- \n
- \u9762\u5411\u5bf9\u8c61<\/a>\n
- \n
- \u5c01\u88c5<\/a><\/li>\n
- \u7ee7\u627f<\/a><\/li>\n
- \u591a\u6001<\/a><\/li>\n
- \u6784\u9020\u5668\u987a\u5e8f<\/a><\/li>\n
- \u5355\u6839\u7ee7\u627f<\/a><\/li>\n
- \u6cdb\u578b<\/a><\/li>\n<\/ul>\n<\/li>\n
- final \u5173\u952e\u5b57<\/a><\/li>\n
- \u5e8f\u5217\u5316<\/a><\/li>\n
- \u5185\u5b58\u6ea2\u51fa\u548c\u5185\u5b58\u6cc4\u6f0f<\/a><\/li>\n
- String<\/a>\n
- \n
- String StringBuilder StringBuffer<\/a><\/li>\n<\/ul>\n<\/li>\n
- \u52a8\u6001\u4ee3\u7406\u7b49<\/a><\/li>\n
- python vs java<\/a><\/li>\n
- jvm<\/a><\/li>\n
- \u5bb9\u5668\uff08\u81ea\u5df1\u5b9e\u73b0\u4e00\u904d\uff09<\/a>\n
- \n
- Hashmap<\/a><\/li>\n
- list<\/a>\n
- \n
- list \u5927\u5c0f<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- \u591a\u7ebf\u7a0b<\/a>\n
- \n
- Synchronized<\/a><\/li>\n
- \u539f\u5b50\u64cd\u4f5c aotomic access<\/a><\/li>\n
- volatile vs synchronized<\/a><\/li>\n
- \u6b7b\u9501<\/a><\/li>\n
- \u751f\u4ea7\u8005\u3001\u6d88\u8d39\u8005\u7a0b\u5e8f\u3002wait \u548cnotify<\/a><\/li>\n
- \u9501 Lock<\/a><\/li>\n<\/ul>\n<\/li>\n
- Executor \u6267\u884c\u5668<\/a><\/li>\n
- \u7ebf\u7a0b\u6c60<\/a><\/li>\n<\/ul>\n<\/li>\n
- \u8bbe\u8ba1\u6a21\u5f0f<\/a>\n
- \n
- \u89c2\u5bdf\u8005\u6a21\u5f0f<\/a><\/li>\n
- \u5de5\u5382\u6a21\u5f0f<\/a>\n
- \n
- \u4ec0\u4e48\u662f\u5de5\u5382\u6a21\u5f0f\uff0c\u5177\u4f53\u89e3\u51b3\u54ea\u4e9b\u95ee\u9898<\/a><\/li>\n
- \u4f18\u70b9<\/a><\/li>\n
- \u7f3a\u70b9<\/a><\/li>\n
- \u5de5\u5382\u6a21\u5f0f\u7684\u5e94\u7528<\/a><\/li>\n
- \u5de5\u5382\u6a21\u5f0f\u7684\u5b9e\u73b0<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- WEB<\/a>\n
- \n
- http \u4e0e https \u7684\u533a\u522b<\/a><\/li>\n
- HTTP\u6d41\u7a0b<\/a><\/li>\n<\/ul>\n<\/li>\n
- Socket<\/a><\/li>\n
- spring \u4e0e\u5fae\u670d\u52a1<\/a>\n
- \n
- spring<\/a><\/li>\n
- spring boot<\/a><\/li>\n
- REST<\/a><\/li>\n<\/ul>\n<\/li>\n
- \u6d4b\u8bd5<\/a><\/li>\n
- \u6570\u636e\u5e93<\/a><\/li>\n
- \u7f51\u7edc<\/a><\/li>\n
- \u7b80\u5386<\/a>\n
- \n
- Beego\u7684\u7279\u6027 \u4e0eSpring\u7684\u533a\u522b<\/a><\/li>\n
- Golang\u4e0ejava\u7684\u4e0d\u540c<\/a><\/li>\n
- Golang\u591a\u7ebf\u7a0b<\/a><\/li>\n
- Restful API\u4e0e\u666e\u901aAPI\u533a\u522b\uff0c\u5982\u4f55\u8bbe\u8ba1\uff0cGET\u3001PUT\u5728\u4ec0\u4e48\u573a\u666f\u4e0b\u4f7f\u7528<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
<\/p>\n
java<\/h1>\n
\u901f\u8bb0\u5c0f\u77e5\u8bc6\uff1a
\nbyte 8bit 1\u5b57\u8282
\nint 32\u4f4dbit 4\u5b57\u8282 \u5927\u5c0f 2^31 \u56e0\u4e3a\u6709\u4e00\u4e2a\u7b26\u53f7\u4f4d
\nchar 16\u4f4d 2\u5b57\u8282 65536 2^16 \u4e24\u4e2a\u5b57\u8282<\/p>\n\u9762\u5411\u5bf9\u8c61<\/h2>\n
\u5bf9\u8c61\u662f\u5bf9\u73b0\u5b9e\u793e\u4f1a\u7684\u62bd\u8c61\uff0c\u4f8b\u5982\u72d7\u3001\u5efa\u7b51\u3001\u670d\u52a1\u7b49\u90fd\u53ef\u4ee5\u5c06\u5176\u4f5c\u4e3a\u7a0b\u5e8f\u4e2d\u7684\u5bf9\u8c61\uff0c\u5bf9\u8c61\u5177\u6709\u72b6\u6001\u3001\u884c\u4e3a\u548c\u6807\u8bc6\u3002\u610f\u5473\u7740\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u90fd\u53ef\u4ee5\u62e5\u6709\u5185\u90e8\u6570\u636e\u4ee5\u53ca\u65b9\u6cd5\uff0c\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u90fd\u53ef\u4ee5\u552f\u4e00\u5730\u4e0e\u5176\u4ed6\u5bf9\u8c61\u533a\u5206\u5f00\u6765\uff0c\u5c31\u662f\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u5728\u5185\u5b58\u4e2d\u90fd\u6709\u552f\u4e00\u7684\u5730\u5740\u3002\uff08\u5b58\u50a8\u5728\u6808\u4e0a\uff09\u3002
\n \u6240\u6709\u5bf9\u8c61\u90fd\u662f\u552f\u4e00\u7684\uff0c\u5177\u6709\u4e0d\u540c\u72b6\u6001\uff08\u6570\u636e\uff09\u4f46\u662f\u6709\u76f8\u540c\u7279\u6027\u548c\u884c\u4e3a\u7684\u5bf9\u8c61\u5f52\u5c5e\u4e3a\u7c7b\u5373class\u3002\u4e00\u4e2a\u7c7b\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\uff0c\u7a0b\u5e8f\u901a\u8fc7\u5b9a\u4e49\u7c7b\u6765\u9002\u5e94\u95ee\u9898\uff0c\u800c\u4e0d\u4ec5\u53ef\u4ee5\u4f7f\u7528\u73b0\u6709\u7684\u7528\u6765\u8868\u793a\u673a\u5668\u4e2d\u7684\u5b58\u50a8\u5355\u5143\u7684\u6570\u636e\u7c7b\u578b\u3002\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u901a\u8fc7\u6dfb\u52a0\u65b0\u7684\u6570\u636e\u7c7b\u578b\u6765\u6269\u5c55\u7f16\u7a0b\u8bed\u8a00\uff0c\u50cf\u5bf9\u5185\u7f6e\u7c7b\u578b\u4e00\u6837\u5730\u7167\u7ba1\u4ed6\u4eec\u548c\u8fdb\u884c\u7c7b\u578b\u68c0\u67e5\u3002<\/p>\n\u5c01\u88c5<\/h3>\n
\u901a\u8fc7\u5408\u5e76\u7279\u5f81\u548c\u884c\u4e3a\u6765\u521b\u5efa\u65b0\u7684\u6570\u636e\u7c7b\u578b<\/p>\n
\u7ee7\u627f<\/h3>\n
\u7ee7\u627f\u4f7f\u5f97\u4ece\u540c\u4e00\u57fa\u7c7b\u5bfc\u51fa\u7684\u591a\u79cd\u7c7b\u578b\u89c6\u4e3a\u540c\u4e00\u79cd\u7c7b\u578b\u5904\u7406\uff0c\u540c\u4e00\u4efd\u4ee3\u7801\u53ef\u4ee5\u6beb\u65e0\u5dee\u522b\u7684\u8fd0\u884c\u5728\u8fd9\u4e9b\u4e0d\u540c\u7c7b\u578b\u4e0a<\/p>\n
\u591a\u6001<\/h3>\n
\u8c03\u7528\u540c\u4e00\u79cd\u7c7b\u578b\u4ea7\u751f\u4e0d\u540c\u7684\u65b9\u6cd5\u3002\u4f7f\u4eba\u4eec\u53ef\u4ee5\u7f16\u5199\u51fa\u4e0d\u4f9d\u8d56\u7279\u5b9a\u7c7b\u578b\u7684\u4ee3\u7801\uff0c\u6dfb\u52a0\u7c7b\u578b\u7684\u65f6\u5019\u80fd\u591f\u6267\u884c\u4e0d\u540c\u7684\u4ee3\u7801\u3002\u524d\u63d0\u662f\u8fd9\u4e9b\u4e0d\u540c\u7684\u7c7b\u578b\u90fd\u662f\u540c\u4e00\u4e2a\u57fa\u7c7b\u5bfc\u51fa\u3002\u7a0b\u5e8f\u5458\u53ea\u4e0e\u57fa\u7c7b\u6253\u4ea4\u9053\uff0c\u6839\u636e\u9700\u8981\u6dfb\u52a0\u4efb\u610f\u591a\u7684\u7c7b\u578b\uff0c\u901a\u8fc7\u8c03\u7528\u57fa\u7c7b\u63a5\u53e3\u4ea7\u751f\u5b50\u7c7b\u65b9\u6cd5\u3002<\/p>\n
\u591a\u6001\u7684\u610f\u4e49\uff1a
\n– \u6539\u5584\u4ee3\u7801\u7684\u7ec4\u7ec7\u6027
\n– \u521b\u5efa\u53ef\u6269\u5c55\u7a0b\u5e8f\uff0c\u6d88\u9664\u7c7b\u578b\u4e4b\u95f4\u7684\u8026\u5408\u5173\u7cfb<\/p>\n\u5c06\u5b50\u7c7b\u5bf9\u8c61\u4f5c\u4e3a\u57fa\u7c7b\u7684\u5f15\u7528\u8fdb\u884c\u53c2\u6570\u4f20\u9012\uff0c\u7f16\u8bd1\u5668\u5982\u4f55\u5f97\u77e5\uff1f\u4e0e\u540e\u671f\u7ed1\u5b9a\u76f8\u5173\u3002
\n– \u7ed1\u5b9a\uff1a\u5c06\u65b9\u6cd5\u7684\u8c03\u7528\u548c\u65b9\u6cd5\u4e3b\u4f53\u5173\u8054
\n– \u524d\u671f\u7ed1\u5b9a\uff1a\u7a0b\u5e8f\u8fd0\u884c\u524d\u7ed1\u5b9a\uff0c\u4f8b\u5982\u9762\u5411\u8fc7\u7a0b\u7684\u8bed\u8a00\u3002
\n– \u540e\u671f\u7ed1\u5b9a\uff08\u52a8\u6001\u7ed1\u5b9a\uff09\uff1a\u8fd0\u884c\u65f6\u6839\u636e\u5bf9\u8c61\u7684\u7c7b\u578b\u8fdb\u884c\u7ed1\u5b9a\u3002\u9700\u8981\u67d0\u4e00\u79cd\u673a\u5236\u6765\u5b9e\u73b0\u52a8\u6001\u7ed1\u5b9a\uff0c\u627e\u5230\u6b63\u786e\u7684\u65b9\u6cd5\u4f53\u3002\u5bf9\u8c61\u4e2d\u6709\u67d0\u79cd\u7c7b\u578b\u4fe1\u606f\uff0c\u9664\u4e86static\u548cfinal\u5916\u7684\u65b9\u6cd5<\/code>\u90fd\u662f\u52a8\u6001\u7ed1\u5b9a\uff08\u57df\u4e0d\u662f\uff09\uff1a\u4f8b\u5982\u7c7b\u4e2d\u7684 value=1\uff0c\u548cgetValue{return 1}\uff0c\u5411\u4e0a\u8f6c\u578b\u65f6\u57df\u7684\u503c\u4e0d\u4f1a\u6539\u53d8\u4f9d\u7136\u662f\u57fa\u7c7b\u7684\u503c\uff0c\u4e0d\u662f\u591a\u6001\u7684\uff0c\u800c\u65b9\u6cd5\u5219\u4f1a\u88ab\u8986\u76d6\u3002\u540c\u6837\uff0c\u5982\u679c\u662f\u9759\u6001\u65b9\u6cd5\uff0c\u4e5f\u4e0d\u662f\u591a\u6001\u7684\u3002<\/p>\n\u6784\u9020\u5668\u987a\u5e8f<\/h3>\n
\uff081\uff09\u57fa\u7c7b
\n\uff082\uff09\u7c7b\u4e2d\u7684\u521d\u59cb\u5316\u5bf9\u8c61\uff0c\u6309\u7167\u58f0\u660e\u987a\u5e8f
\n\uff083\uff09\u5b50\u7c7b\u6784\u9020\u5668\u4e3b\u4f53<\/p>\n\u5355\u6839\u7ee7\u627f<\/h3>\n
java\u6240\u6709\u7684\u7c7b\u7ee7\u627f\u4e8eObject\u7c7b\uff0c\u4f18\u52bf\u5728\u4e8e\u5168\u90e8\u7ee7\u627f\u4e8e\u540c\u4e00\u4e2a\u57fa\u7c7b\uff0c\u4fdd\u8bc1\u6240\u6709\u5bf9\u8c61\u90fd\u5177\u6709\u67d0\u4e9b\u529f\u80fd\uff0c\u90fd\u5177\u6709object\u7c7b\u578b\u4fe1\u606f\uff0c\u53ef\u4ee5\u786e\u5b9a\u7c7b\u578b\u5bf9\u8c61\uff0c\u4f7f\u5783\u573e\u56de\u6536\u5668\u7684\u5b9e\u73b0\u53d8\u5f97\u5bb9\u6613\u3002<\/p>\n
\u6cdb\u578b<\/h3>\n
\u56e0\u4e3a\u6240\u6709\u7684\u7c7b\u7684\u57fa\u7c7b\u662fObject\u7c7b\uff0c\u6240\u4ee5\u610f\u5473\u7740\uff0c\u4efb\u4f55\u53ef\u4ee5\u5b58\u50a8object \u7684\u5bb9\u5668\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u4e1c\u897f\u3002\u8fd9\u5e26\u6765\u4e86\u4e00\u4e2a\u95ee\u9898\uff0c\u5bb9\u5668\u7f6e\u5165\u5bf9\u8c61\u7684\u5f15\u7528\u7684\u65f6\u5019\uff0c\u5fc5\u987b\u5411\u4e0a\u8f6c\u578b\u6210Object\u7c7b\u578b\uff0c\u4ece\u5bb9\u5668\u53d6\u51fa\u65f6\u5019\u9700\u8981\u6b63\u786e\u7684\u5411\u4e0b\u8f6c\u578b\uff0c\u56e0\u6b64\u9700\u8981\u77e5\u9053\u5bb9\u5668\u4fdd\u5b58\u7684\u5bf9\u8c61\u7684\u7c7b\u578b\uff0c\u6240\u4ee5\u5728JAVA
\nSE5\u540e\uff0c\u589e\u52a0\u4e86\u6cdb\u578b\uff0c\u4fdd\u5b58\u7c7b\u578b\u4fe1\u606f\u3002<\/p>\nfinal \u5173\u952e\u5b57<\/h2>\n
final\u4fee\u9970\u57df
\nfinal \u4fee\u9970\u7c7b\u4e0e\u65b9\u6cd5 \u9632\u6b62\u7ee7\u627f\u5e26\u6765\u7684\u91cd\u5199\u95ee\u9898<\/p>\n\u5e8f\u5217\u5316<\/h2>\n
\u5c06\u4e00\u4e2a\u5bf9\u8c61\u53d8\u6210\u4e00\u4e2a\u53ef\u4ee5\u4f20\u8f93\u7684\u4e1c\u897f\uff0c\u6bd4\u5982byte\u6570\u7ec4\uff0c\u53ef\u4ee5\u4fdd\u5b58\u5230\u6587\u4ef6\u4e2d<\/p>\n
\u5185\u5b58\u6ea2\u51fa\u548c\u5185\u5b58\u6cc4\u6f0f<\/h2>\n
\u5185\u5b58\u6ea2\u51fa\uff1a\u7b80\u5355\u5730\u8bf4\u5185\u5b58\u6ea2\u51fa\u5c31\u662f\u6307\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u7533\u8bf7\u7684\u5185\u5b58\u5927\u4e8e\u7cfb\u7edf\u80fd\u591f\u63d0\u4f9b\u7684\u5185\u5b58\uff0c\u5bfc\u81f4\u65e0\u6cd5\u7533\u8bf7\u5230\u8db3\u591f\u7684\u5185\u5b58\uff0c\u4e8e\u662f\u5c31\u53d1\u751f\u4e86\u5185\u5b58\u6ea2\u51fa\u3002 \u5185\u5b58\u6cc4\u6f0f\u8d8a\u591a\u6700\u7ec8\u4f1a\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u3002
\n\u5185\u5b58\u6cc4\u6f0f\uff1a\u5185\u5b58\u6cc4\u6f0f\u6307\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u5206\u914d\u5185\u5b58\u7ed9\u4e34\u65f6\u53d8\u91cf\uff0c\u7528\u5b8c\u4e4b\u540e\u5374\u6ca1\u6709\u88abGC\u56de\u6536\uff0c\u59cb\u7ec8\u5360\u7528\u7740\u5185\u5b58\uff0c\u65e2\u4e0d\u80fd\u88ab\u4f7f\u7528\u4e5f\u4e0d\u80fd\u5206\u914d\u7ed9\u5176\u4ed6\u7a0b\u5e8f\uff0c\u4e8e\u662f\u5c31\u53d1\u751f\u4e86\u5185\u5b58\u6cc4\u6f0f\uff0c\u6bd4\u5982\u6b7b\u5faa\u73af\u4ea7\u751f\u5927\u91cf\u5bf9\u8c61\u65e0\u6cd5\u91ca\u653e\u3002<\/p>\nString<\/h2>\n
String s = “abc” \u4e0e String s =new String\uff08”abc”\uff09\u4e0d\u540c\u3002
\n\u524d\u8005\u521b\u5efa\u7684\u5b57\u7b26\u4e32\u503c\u5b58\u50a8\u5728\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u4e2d\uff08\u65b9\u6cd5\u533a\uff09\uff0c\u540e\u8005\u5728\u5806\u4e0a\u3002\u540e\u8005\u521b\u5efa\u540e\uff0c\u5e38\u91cf\u6c60\u4e2d\u6709\u4e00\u4e2a\u201cabc\u201d\uff0c\u5806\u4e0a\u6709\u4e00\u4e2anew (“abc”),\u6808\u4e0a\u6709\u4e00\u4e2a\u5f15\u7528s\u3002
\n\u521b\u5efa\u5b57\u7b26\u4e32\u6c60\u7684\u539f\u56e0\uff1a\u56e0\u4e3a\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u7684\u4ee3\u4ef7\u5f88\u5927\uff0c\u9700\u8981\u4e00\u5b9a\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u800c\u5b57\u7b26\u4e32\u662f\u7ecf\u5e38\u4f7f\u7528\u7684\u7c7b\u578b\uff0c\u6240\u4ee5JVM\u4e3a\u4e86\u51cf\u5c11\u5185\u5b58\u5f00\u9500\uff0c\u4e3a\u5b57\u7b26\u4e32\u5f00\u8f9f\u4e86\u5b57\u7b26\u4e32\u6c60String Pool\u7c7b\u4f3c\u4e8e\u7f13\u5b58\u533a\u3002\u5728\u521b\u5efa\u5b57\u7b26\u4e32\u5e38\u91cf\u65f6\u5019\uff0c\u5148\u5224\u65ad\u5b57\u7b26\u4e32\u6c60\u662f\u5426\u6709\u8be5\u5b57\u7b26\u4e32\uff08s1==s2\uff09\uff0c\u5b58\u5728\u5219\u8fd4\u56de\u5f15\u7528\u5b9e\u4f8b\uff0c\u4e0d\u5b58\u5728\u5219\u5c06\u5b57\u7b26\u4e32\u653e\u8fdbstring pool\u4e2d\u3002
\n<\/p>\n
String StringBuilder StringBuffer<\/h3>\n
String + \u4f1a\u4e0d\u65ad\u4ea7\u751f\u5bf9\u8c61
\nStringBuilder\u662f\u5bf9char\u6570\u7ec4\u6269\u5bb9\uff0c\u6bcf\u6b21\u6269\u5bb9\u539f\u6765\u7684\u4e24\u500d
\nStringBuffer\u7ebf\u7a0b\u5b89\u5168\uff0c\u4f1a\u6709\u989d\u5916\u7684\u6d88\u8017<\/p>\n\u52a8\u6001\u4ee3\u7406\u7b49<\/h2>\n
python vs java<\/h2>\n
- \n
- \u8bed\u6cd5\uff1apython \u65e0\u9700\u5b9a\u4e49\u7c7b\u578b\u3001\u58f0\u660e\u53d8\u91cf\uff0c\u6bd4\u8f83\u65b9\u4fbf\uff08\u9002\u7528\u722c\u866b\u722c\u53d6\u6570\u636e\uff09\uff0cjava\u9700\u8981\u5b9a\u4e49\u7c7b\uff0c\u4e14python\u6df7\u5408\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u4ee5\u53ca\u547d\u4ee4\u8bed\u8a00\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd0\u884c\uff0cjava\u5219\u9700\u8981\u7f16\u8bd1\uff0cpython\u662f\u5728\u8fd0\u884c\u65f6\u5019\u7f16\u8bd1\u3002<\/li>\n
- \u6027\u80fd\uff1apython\u5f31\u4e8ejava<\/li>\n
- \u9002\u7528\u573a\u666f\uff1ajava\u9002\u5408web\u5f00\u53d1\u3001\u5927\u6570\u636e\u5f00\u53d1\u7b49\uff1bpython\u9002\u5408\u6570\u636e\u5206\u6790\u4eba\u5de5\u667a\u80fd\u3001\u6d4b\u8bd5\u7b49\u5177\u6709\u5f88\u591a\u4eba\u5de5\u667a\u80fd\u76f8\u5173\u5e93\u3002<\/li>\n<\/ul>\n
jvm<\/h2>\n
jvm\u5c06\u5185\u5b58\u533a\u57df\u5206\u4e3a\uff1a
\n1. \u7ebf\u7a0b\u5171\u4eab\uff1a
\n– \u65b9\u6cd5\u533a\uff1a\u7c7b\u7684\u4fe1\u606f\uff08\u4ee3\u7801\u3001\u5c5e\u6027\u3001\u65b9\u6cd5\u3001\u53d8\u91cf\u7b49\uff09\uff0cClass\u53cd\u5c04\u83b7\u53d6\u7684\u7c7b\u4fe1\u606f\u6765\u81ea\u65b9\u6cd5\u533a\u3002\u7ebf\u7a0b\u5171\u4eab\uff0c\u968f\u7740\u7a0b\u5e8f\u7684\u7ed3\u675f\u88abjvm\u7684GC\u56de\u6536\u3002
\n– \u5806\uff1anew\u51fa\u6765\u7684\u5bf9\u8c61\uff08\u5c5e\u6027\u3001\u65b9\u6cd5\uff09
\n2. \u7ebf\u7a0b\u4e0d\u5171\u4eab\uff1a\uff08\u968f\u7740\u7ebf\u7a0b\u7684\u7ed3\u675f\u800c\u6d88\u4ea1\uff0c\u65e0\u9700\u8fc7\u591a\u8003\u8651\u56de\u6536\u95ee\u9898\uff0c\u7f16\u8bd1\u7684\u65f6\u5019\u786e\u5b9a\u6240\u9700\u5185\u5b58\u7684\u5927\u5c0f\uff09
\n– \u7a0b\u5e8f\u8ba1\u6570\u5668\u3001
\n– \u865a\u62df\u673a\u3001
\n– \u6808\uff1a\u5bf9\u8c61\u7684\u5730\u5740<\/p>\n\u5bb9\u5668\uff08\u81ea\u5df1\u5b9e\u73b0\u4e00\u904d\uff09<\/h2>\n
\u6570\u7ec4\u7684\u95ee\u9898\uff1a\u5c3a\u5bf8\u56fa\u5b9a\uff0c\u4e0d\u7075\u6d3b\uff0c\u6548\u7387\u4f4e\u3002
\nHashSet\uff1a\u65e0\u5e8f
\nLinkedHashSet\uff1a\u6309\u7167\u63d2\u5165\u987a\u5e8f
\nTreeSet\uff1a\u5e95\u5c42\u6811\u7ed3\u6784\uff0c\u5b9e\u73b0comparable\u63a5\u53e3\uff0c\u6309\u7167\u5927\u5c0f\u6392\u5217\u3002<\/p>\nHashmap<\/h3>\n
\u6563\u5217\u7684\u4ef7\u503c\u5728\u4e8e\u67e5\u627e\u7684\u901f\u5ea6\uff0c\u800c\u952e\u7684\u67e5\u8be2\u6bd4\u8f83\u6162\uff0c\u56e0\u6b64\u9700\u8981\u4fdd\u6301\u952e\u7684\u6392\u5e8f\u4e13\u9898\u3002
\n\u54c8\u5e0c\u662f\u4ec0\u4e48\uff1f
\n\u54c8\u5e0c\u8868\u662f\u4e00\u79cd\u6620\u5c04\u8868\uff0c\u4e3a\u4e86\u51cf\u5c11\u987a\u5e8f\u67e5\u627e\u6240\u9700\u7684\u6bd4\u8f83\u65f6\u95f4\uff0c\u6211\u4eec\u5e0c\u671b\u4e0d\u7ecf\u8fc7\u7ed9\u4efb\u4f55\u7684\u6bd4\u8f83\uff0c\u4e00\u6b21\u5b58\u53d6\u5c31\u80fd\u5f97\u5230\u503c\uff0c\u5c31\u8981\u5728\u67e5\u627e\u7684\u6570\u503c\u548c\u5b58\u50a8\u4f4d\u7f6e\u4e0a\u5efa\u7acb\u4e00\u4e2a\u6620\u5c04\u8868\uff0c\u6bcf\u4e00\u4e2a\u6570\u503c\u90fd\u6709\u552f\u4e00\u7684\u5730\u5740\u4e0e\u5176\u5bf9\u5e94\u3002\u901a\u8fc7\u6620\u5c04\u5173\u7cfbf\uff0c\u627e\u5230\u7ed9\u5b9a\u503c\u6570\u503c\u7684\u5730\u5740f\uff08k\uff09\u3002\u8fd9\u6837\u4e0d\u9700\u8981\u6bd4\u8f83\u5c31\u80fd\u76f4\u63a5\u53d6\u5f97\u503c\u3002<\/p>\n\u597d\u7684\u54c8\u5e0c\u51fd\u6570\uff1f
\n\u597d\u7684\u54c8\u5e0c\u51fd\u6570\u6620\u5c04\u51fa\u7684\u6570\u503c\u53ef\u4ee5\u5747\u5300\u5730\u5206\u5e03\u5728\u4e00\u4e2a\u5730\u5740\u96c6\u5408\u91cc\u9762\u3002\u6362\u53e5\u8bdd\u8bf4\u5c31\u662f\uff0c\u6570\u503c\u7ecf\u8fc7\u54c8\u5e0c\u5f97\u5230\u7684\u6570\u636e\u662f\u968f\u673a\u7684\uff0c\u4e24\u4e2a\u4e0d\u540c\u6570\u503c\u5f97\u5230\u540c\u4e00\u4e2a\u54c8\u5e0c\u503c\u7684\u60c5\u51b5 \u4e5f\u5c31\u662f\u51b2\u7a81\u8981\u5c3d\u53ef\u80fd\u5730\u5c11\u3002<\/p>\n\u5c06\u81ea\u5df1\u5199\u7684\u7c7b\u4f5c\u4e3aHashMap\u7684\u952e\uff0c\u5fc5\u987b\u91cd\u8f7dhashCode()\u548cequals()\u3002\u4e0d\u91cd\u8f7d\u7684\u8bdd\uff0c\u8c03\u7528\u7684\u662fObject\u7c7b\u7684hashCode\u548cequals\uff0c\u8fd4\u56de\u5bf9\u8c61\u5730\u5740\u7684\u54c8\u5e0c\u7801\u4ee5\u53ca\u6bd4\u8f83\u7684\u662f\u5bf9\u8c61\u7684\u5730\u5740\u662f\u5426\u4e00\u81f4\u3002\uff08HashSet\u4e5f\u662f\uff09<\/code><\/p>\nHashMap\u7684\u904d\u5386
\n\u4f7f\u7528Map.Entry\u4fdd\u5b58\u952e\u503c\u5bf9\uff0centrySet()\u4f7f\u7528HashSet\u6765\u4fdd\u5b58Entry\u3002<\/p>\n\u53d1\u751f\u51b2\u7a81\u65f6\u5019\uff1f
\n\u53ef\u4ee5\u901a\u8fc7\u5916\u90e8\u94fe\u8868\u89e3\u51b3\uff0c\u6570\u7ec4\u4e0d\u4fdd\u5b58\u503c\u4fdd\u5b58\u503c\u7684list\u3002key\u7684hash\u503c\u4f5c\u4e3a\u6570\u7ec4\u7684\u7d22\u5f15<\/p>\n\n \u95ee\u9898\u4e00\uff1a\u4ec0\u4e48\u65f6\u5019\u4f7f\u7528hashmap\uff1f\u6709\u4ec0\u4e48\u7279\u70b9\uff1f\n<\/p><\/blockquote>\n
hashmap\u57fa\u4e8emap\u63a5\u53e3\u5b9e\u73b0\uff0c\u53ef\u4ee5\u5b58\u50a8\u952e\u503c\u5bf9\uff0c\u5e76\u4e14\u5bf9\u5b58\u50a8\u5730\u5740\u8fdb\u884c\u54c8\u5e0c\u64cd\u4f5c\uff0c\u76f8\u6bd4\u8f83\u4e8e\u6570\u7ec4\uff0c\u53ef\u4ee5\u66f4\u5feb\u5730\u901a\u8fc7key\u503c\u67e5\u627evalue\u3002\u5141\u8bb8null\u503c\uff0c\u975e\u540c\u6b65\uff0c\u4e0d\u4fdd\u8bc1\u6709\u5e8f\uff08LinkedHashMap\u53ef\u4ee5\u4fdd\u8bc1\u63d2\u5165\u987a\u5e8f\uff0c\u4f7f\u7528\u94fe\u8868\u7ef4\u62a4\u5185\u90e8\u987a\u5e8f\uff09<\/p>\n
\n \u95ee\u9898\u4e8c\uff1a hashmap\u5de5\u4f5c\u539f\u7406\uff1f\n<\/p><\/blockquote>\n
Hashmap\u5b58\u50a8\u8bbf\u95ee\u952e\u503c\u5bf9\u53ef\u4ee5\u7531put get \u65b9\u6cd5\u5b9e\u73b0\u3002\u4e3b\u8981\u662f\u7531\u6570\u7ec4\u548c\u94fe\u8868\u5b58\u50a8\u6570\u636e\uff0c\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u662f\u94fe\u8868\u7684\u8282\u70b9\uff0c\u53d1\u751f\u54c8\u5e0c\u51b2\u7a81\u7684\u8bdd\uff0c\u76f4\u63a5\u4ee5\u94fe\u8868\u7684\u5f62\u5f0f\u6dfb\u52a0\u8282\u70b9\u5373\u53ef\uff08\u94fe\u8868\u5982\u679c\u8fc7\u957f\u5219\u8f6c\u4e3a\u7ea2\u9ed1\u6811\u5f62\u5f0f\u5b58\u50a8\uff09\u3002put\u65b9\u6cd5\u5bf9\u5b58\u5165\u7684\u952e\u503c\u5bf9\u7684key\u8fdb\u884c\u54c8\u5e0c\u64cd\u4f5c\u5f97\u5230\u54c8\u5e0c\u503c\u540e\uff0c\u901a\u8fc7\u6309\u4f4d\u4e0e\u64cd\u4f5c\u5f97\u5230\u5b58\u50a8\u7684\u6570\u7ec4index\uff0c\u67e5\u770b\u662f\u5426\u6709Node\u8282\u70b9\uff08Node\u7c7b\u7ee7\u627fMap.Entry\uff09 \u5982\u679c\u6ca1\u6709\u5219\u5728\u8be5\u5730\u5740\u65b0\u5efaNode\uff1b\u5982\u679c\u6709\u904d\u5386\u8be5\u4e0b\u6807\u5b58\u50a8\u7684\u94fe\u8868\uff0c\u627e\u5230\u76f8\u5e94\u7684key\u503c\uff0c\u65b0\u6570\u636e\u66ff\u6362\u65e7\u6570\u636e\u6765\u5b58\u50a8\u6570\u636e\u3002
\nget()\u65b9\u6cd5\uff0c\u83b7\u53d6key\u7684hash\u503c\uff0c\u67e5\u627e\u76f8\u5e94\u7684\u6570\u503c\u3002<\/p>\n\n \u95ee\u9898\u4e09\uff1ahashcode\u65b9\u6cd5\u548cequals\uff08\uff09\u65b9\u6cd5\n<\/p><\/blockquote>\n
hashcode\u65b9\u6cd5\u63d0\u4f9b\u4e00\u79cd\u54c8\u5e0c\u7b97\u6cd5\u5bf9key\u8fdb\u884c\u54c8\u5e0c\u64cd\u4f5c\uff0c\u83b7\u5f97\u4e00\u4e2a\u54c8\u5e0c\u503c\uff0c\u901a\u8fc7\u8ba1\u7b97\u53ef\u4ee5\u5f97\u5230\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u7684\u4e0b\u6807\u3002equals\u65b9\u6cd5\u9996\u5148\u6bd4\u8f83\u4e24\u4e2a\u5bf9\u8c61\u7684\u5730\u5740\uff0c\u5982\u679c\u5bf9\u8c61\u5730\u5740\u76f8\u7b49\u5219\u4e00\u5b9a\u76f8\u7b49\uff0c\u5982\u679c\u5730\u5740\u4e0d\u7b49\u6bd4\u8f83key\u4e0eValue\u7684\u503c\uff0c\u901a\u8fc7Map.Entry\u6bd4\u8f83<\/p>\n
list<\/h3>\n
Arrays.asList \u8fd4\u56deArrays\u5185\u90e8\u5b9e\u73b0\u7684ArrayList\uff0c\u672a\u5b9e\u73b0add\u65b9\u6cd5\uff08\u5b9e\u73b0\u7684\u662f\u629b\u51faunsupportedOperationException\u5f02\u5e38\uff09\uff0c\u5e76\u975ejava util\u4e2d\u7684ArrayList\u7c7b\u3002\u82e5\u60f3\u5c06\u6570\u7ec4\u8f6c\u4e3aList\u5e76\u4e14\u6539\u53d8\u5927\u5c0f\uff0c\u5219\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528addAll\u65b9\u6cd5\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u3002<\/p>\n
list \u5927\u5c0f<\/h4>\n
\u7b2c 10 : 10
\n\u7b2c 15 : 15
\n\u7b2c 22 : 22
\n\u7b2c 33 : 33
\n\u7b2c 49 : 49
\n\u7b2c 73 : 73
\n\u7b2c 100 : 109
\n5 7 11 16 24 36<\/p>\n\u6bcf\u6b21\u6dfb\u52a0\u539f\u6765\u957f\u5ea6\u76841\/2,\u6269\u5bb9\u4e3a\u539f\u6765\u957f\u5ea6\u76841.5\u500d<\/p>\n
java\u4ee3\u7801\u662f\u53f3\u79fb\u4e00\u4f4d\uff0c\u9664\u4ee52\u3002\u53f3\u79fb\u662f\u56e0\u4e3a\u5e95\u5c42\u901f\u5ea6\u66f4\u5feb
\n int newCapacity = oldCapacity + (oldCapacity >> 1);<\/p>\n\u591a\u7ebf\u7a0b<\/h2>\n
- \n
- Thread<\/li>\n
- Runnable<\/li>\n
- Callable \u53ef\u4ee5\u6709\u8fd4\u56de\u503c\uff0c\u8fd4\u56de\u503c\u901a\u8fc7 FutureTask \u8fdb\u884c\u5c01\u88c5\uff0cnew Thread\uff08new FutureTask<\u8fd4\u56de\u503c\u7c7b\u578b>\uff08\u8fd4\u56de\u503c\u53d8\u91cf\uff09\uff09<\/li>\n<\/ul>\n
Synchronized<\/h3>\n
Synchronized \u53ef\u4ee5\u89e3\u51b3\u591a\u7ebf\u7a0b\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\u65f6\u5019\u5e26\u6765\u7684\u7ebf\u7a0b\u5e72\u6270Thread Interference \u4ee5\u53ca \u5185\u5b58\u4e00\u81f4\u6027\u95ee\u9898 Memory Consistency\uff08\u591a\u7ebf\u7a0b\u5bf9\u540c\u4e00\u6570\u636e\u7684\u89c6\u56fe\u4e0d\u4e00\u81f4\uff0c\u901a\u8fc7\u5236\u5b9a\u7ebf\u7a0b\u8bfb\u53d6\u7684\u5148\u540e\u987a\u5e8f\u53ef\u4ee5\u89e3\u51b3\uff0c\u6bd4\u5982join\uff09\u3002\u8fd9\u79cd\u65b9\u6cd5\u662f\u9ad8\u6548\u7684\uff0c\u4f46\u662f\u4f9d\u7136\u6709\u95ee\u9898\u3002
\nSynchronized \u60ef\u7528\u8bed\u6cd5\uff1a\u540c\u6b65\u65b9\u6cd5\u548c\u540c\u6b65\u8bed\u53e5\u3002\uff08\u6784\u9020\u65b9\u6cd5\u9664\u5916\uff09\uff08final\u4fee\u9970\u7684\u5b57\u6bb5\u53ef\u4ee5\u901a\u8fc7\u975e\u540c\u6b65\u65b9\u6cd5\u5b89\u5168\u8bfb\u53d6\uff09\uff0c\u5f3a\u5236\u5bf9\u5bf9\u8c61\u72b6\u6001\u8fdb\u884c\u72ec\u5360\u8bbf\u95ee\uff0c\u4ee5\u53ca\u4e0e\u968f\u540e\u5bf9\u540c\u4e00\u5bf9\u8c61\u7684\u540c\u6b65\u65b9\u6cd5\u7684\u4efb\u4f55\u8c03\u7528\u5efa\u7acb\u5148\u540e\u53d1\u751f\u7684\u5173\u7cfb\uff0c\u4fdd\u8bc1\u5bf9\u8c61\u7684\u72b6\u6001\u5bf9\u6240\u6709\u7ebf\u7a0b\u662f\u53ef\u89c1\u7684\u3002
\n\u540c\u6b65\u8bed\u53e5\uff1aSynchronized\uff08\u5bf9\u8c61\uff09\u6307\u5b9a\u5185\u90e8\u9501\u5bf9\u8c61\uff0c\u5bf9\u8c61\u63d0\u4f9b\u5185\u90e8\u6240\u3002<\/p>\nsynchronized static \u65b9\u6cd5\u53ef\u4ee5\u5728\u7c7b\u7684\u8303\u56f4\u5185\u9632\u6b62\u5bf9static \u6570\u636e\u7684\u5e76\u53d1\u8bbf\u95ee\u3002<\/p>\n
public class MsLunch {\n private long c1 = 0;\n private long c2 = 0;\n private Object lock1 = new Object();\n private Object lock2 = new Object();\n\n public void inc1() {\n synchronized(lock1) {\n c1++;\n }\n }\n\n public void inc2() {\n synchronized(lock2) {\n c2++;\n }\n }\n}\n<\/code><\/pre>\n\u4ee5\u4e0a\u4ee3\u7801\u56e0\u4e3a\u4e0d\u9700\u8981\u963b\u6b62C1\u4e0eC2\u7684\u66f4\u65b0\u4ea4\u7ec7\uff0c\u4f46\u662f\u5b57\u6bb5\u7684\u66f4\u65b0\u5fc5\u987b\u540c\u6b65\uff0c\u56e0\u6b64\u4e0d\u7528synchronized(this)\uff0c\u53e6\u5916\u521b\u5efa\u4e24\u4e2a\u5bf9\u8c61\u6765\u63d0\u4f9b\u5185\u90e8\u9501\u3002<\/p>\n
\n \u8c03\u7528wait\u65b9\u6cd5 \u4e5f\u53ef\u4ee5\u83b7\u5f97\u5bf9\u8c61\u7684\u5185\u90e8\u9501<\/p>\n
\u4ec0\u4e48\u65f6\u5019\u540c\u6b65\u65b9\u6cd5 \u4ec0\u4e48\u65f6\u5019\u540c\u6b65\u8bed\u53e5\uff1f\n<\/p><\/blockquote>\n
\u6839\u636eBrain\u7684\u540c\u6b65\u89c4\u5219\uff1a\u5982\u679c\u4f60\u6b63\u5728\u5199\u4e00\u4e2a\u53d8\u91cf\uff0c\u5b83\u53ef\u80fd\u63a5\u4e0b\u6765\u88ab\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u8bfb\u53d6\uff0c\u6216\u8005\u6b63\u5728\u8bfb\u53d6\u4e00\u4e2a\u4e0a\u4e00\u6b21\u5df2\u7ecf\u88ab\u4fee\u6539\u7684\u53d8\u91cf\uff0c\u90a3\u4e48\u5219\u9700\u8981\u540c\u6b65\u3002\u8bfb\u5199\u8fdb\u7a0b\u90fd\u5fc5\u987b\u7528\u76f8\u540c\u7684\u76d1\u89c6\u5668\u9501\u540c\u6b65\u3002<\/p>\n
\n \u53ef\u91cd\u5165\u540c\u6b65\uff1f
\n \u53ef\u4ee5\u591a\u6b21\u8c03\u7528\u540c\u6b65\uff0c\u800c\u4e0d\u4f1a\u81ea\u6211\u963b\u585e\u3002\u5728\u4e0d\u5bb9\u6613\u638c\u63e1\u662f\u5426\u5df2\u7ecf\u62e5\u6709\u9501\u7684\u60c5\u51b5\u4e0b\u975e\u5e38\u6709\u7528\u3002<\/p>\njava monitor \u76d1\u89c6\u5668\n<\/p><\/blockquote>\n
\u662f\u6307\u88ab\u591a\u4e2a\u7ebf\u7a0b\u5b89\u5168\u4f7f\u7528\u7684\u7c7b\u6216\u8005\u6a21\u5757\u3002\u4f8b\u5982\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u5757\u4e2d\u7684 \u7b49\u5f85\u901a\u77e5\u65b9\u6cd5\u5757\u3002<\/p>\n
\u539f\u5b50\u64cd\u4f5c aotomic access<\/h3>\n
long,double\u7531\u4e8e\u662f64\u4f4d\u56e0\u6b64\u8bfb\u5199\u4e0d\u662f\u539f\u5b50\u7684\uff08\u82e5\u64cd\u4f5c\u7cfb\u7edf\u662f64\u4f4d\u5219\u662f\u539f\u5b50\u7684\uff09\uff0c\u9700\u8981\u7528volatile\u64cd\u4f5c\u3002\u56e0\u4e3a32\u4f4d\u64cd\u4f5c\u7cfb\u7edf\u5904\u7406\u7684\u6700\u957f\u957f\u5ea6\u662f32\u4f4d\uff0c\u82e5\u8981\u5904\u740664\u4f4d\uff0c\u9700\u8981\u989d\u5916\u64cd\u4f5c\u3002
\n\u7ebf\u7a0b\u5728\u5177\u4f53\u6267\u884c\u65f6\u5019\uff0c\u4f1a\u5148\u62f7\u8d1d\u4e3b\u5b58\u6570\u636e\u5230\u7ebf\u7a0b\u672c\u5730\uff08CPU\u7f13\u5b58\uff09\uff0c\u64cd\u4f5c\u5b8c\u540e\u628a\u7ed3\u679c\u4ece\u7ebf\u7a0b\u4f20\u5230\u8d2e\u5b58\u4e2d\u3002volatile\u4e0d\u5141\u8bb8\u5177\u6709\u4e0e\u8d2e\u5b58\u4e2d\u4fdd\u5b58\u503c\u4e0d\u540c\u7684\u53d8\u91cf\u7684\u672c\u5730\u526f\u672c\u3002volatile\u58f0\u660e\u7684\u53d8\u91cf\u5fc5\u987b\u5728\u6240\u7528\u7ebf\u7a0b\u4e2d\u540c\u6b65\uff0c\u56e0\u6b64\u4e0d\u8bba\u4f55\u65f6\u4fee\u6539\u6216\u8005\u8bbf\u95ee\u6570\u636e\uff0c\u6240\u6709\u7684\u7ebf\u7a0b\u770b\u5230\u7684\u90fd\u662f\u540c\u4e00\u4e2a\u503c\u3002
\nvolatile\u64cd\u4f5c\u53ef\u4ee5\u964d\u4f4e\u5185\u5b58\u4e00\u81f4\u6027\u9519\u8bef\uff0c\u7ebf\u7a0b\u8bfb\u53d6volatile\u53d8\u91cf\u603b\u662f\u5bf9\u5176\u4ed6\u7ebf\u7a0b\u53ef\u89c1\uff0c\u53ef\u4ee5\u770b\u5230\u6700\u65b0\u4fee\u6539\u3002volatile\u4ec5\u80fd\u5b9e\u73b0\u57fa\u672c\u7c7b\u578b\u53d8\u91cf\u7684\u539f\u5b50\u6027\uff0c\u4e0d\u80fd\u4fdd\u8bc1\u590d\u5408\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u6bd4\u5982i++\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u810f\u6570\u636e\u7684\u60c5\u51b5\u3002<\/p>\nvolatile vs synchronized<\/h3>\n
- \n
- volatile \u4fee\u9970\u5b57\u6bb5\uff0c\u800csynchronized\u4fee\u9970\u65b9\u6cd5\u548c\u4ee3\u7801\u5757\uff1b<\/li>\n
- synchronized \u83b7\u5f97\u5f53\u524d\u5bf9\u8c61\u7684\u5185\u5728\u9501\uff0c\u963b\u6b62\u5176\u4ed6\u7ebf\u7a0b\u8bbf\u95ee\u76f8\u540c\u7684\u8d44\u6e90\u3002\u5e76\u4e14\u5bf9\u8bbf\u95ee\u7684\u7ebf\u7a0b\u521b\u5efa happens-before\u5173\u7cfb\u786e\u5b9a\u5148\u540e\u987a\u5e8f\uff0c\u4f7f\u5f97\u6240\u6709\u7684\u7ebf\u7a0b\u5bf9\u4e8e\u5171\u4eab\u7684\u8d44\u6e90\u5177\u6709\u76f8\u540c\u7684\u89c6\u56fe\uff0c\u5c06\u6240\u6709CPU\u7f13\u5b58\u7684\u526f\u672c\u5237\u65b0\u5230\u4e3b\u5b58\u4e2d\u3002\u56e0\u6b64synchronized\u64cd\u4f5c\u6d88\u8017\u8d44\u6e90\u66f4\u591a\u3002volatile\u64cd\u4f5c\u5f3a\u5236\u6240\u6709\u7684\u53d8\u91cf\u6240\u6709\u7684\u8bbf\u95ee\u90fd\u5728\u4e3b\u5185\u5b58\u4e2d\uff0cvolatile\u5c31\u80fd\u6ee1\u8db3\u4e00\u4e9b\u5bf9\u53d8\u91cf\u53ef\u89c1\u6027\u6709\u8981\u6c42\u800c\u5bf9\u8bfb\u53d6\u987a\u5e8f\u6ca1\u6709\u8981\u6c42\u7684\u9700\u6c42\u3002<\/li>\n
- volatile\u4e0d\u4f1a\u9020\u6210\u7ebf\u7a0b\u7684\u963b\u585e\uff1bsynchronized\u53ef\u80fd\u4f1a\u9020\u6210\u7ebf\u7a0b\u7684\u963b\u585e\u3002<\/li>\n
- volatile\u4ec5\u80fd\u4fdd\u8bc1\u57fa\u672c\u7c7b\u578b\u53d8\u91cf\u7684\u539f\u5b50\u6027\uff0c\u5176\u4ed6\u590d\u5408\u64cd\u4f5c\u4e0d\u53ef\u4ee5\uff0csynchronized\u53ef\u4ee5\u4fdd\u8bc1\u539f\u5b50\u6027\u3002<\/li>\n<\/ol>\n
\u6b7b\u9501<\/h3>\n
public class DeadLockTest {\n public static Object lock1=new Object();\n public static Object lock2=new Object();\n\n\n public static void main(String[] args) {\n\n new Thread(new Runnable() {\n @Override\n public void run() {\n synchronized (lock1){\n System.out.println(\"hold lock1!\");\n try { Thread.sleep(10); }\n catch (InterruptedException e) {}\n System.out.println(\"wait lock2\");\n synchronized (lock2){\n System.out.println(\"hold lock2&1\");\n }\n\n }\n }\n }).start();\n new Thread(new Runnable() {\n @Override\n public void run() {\n synchronized (lock2){\n System.out.println(\"hold lock12\");\n try { Thread.sleep(10); }\n catch (InterruptedException e) {}\n System.out.println(\"wait lock1\");\n synchronized (lock1){\n System.out.println(\"hold lock1&2\");\n }\n\n }\n }\n }).start();\n }\n}\n\n<\/code><\/pre>\n\u6b7b\u9501\u7684\u56db\u4e2a\u6761\u4ef6\uff1a
\n1. \u4e92\u65a5\u6761\u4ef6\u3002\u4efb\u52a1\u4f7f\u7528\u7684\u8d44\u6e90\u81f3\u5c11\u6709\u4e00\u4e2a\u662f\u4e0d\u80fd\u5171\u4eab\u7684\u3002
\n2. \u81f3\u5c11\u6709\u4e00\u4e2a\u4efb\u52a1\u5fc5\u987b\u6301\u6709\u4e00\u4e2a\u8d44\u6e90\u4e14\u6b63\u5728\u7b49\u5f85\u83b7\u53d6\u4e00\u4e2a\u5f53\u524d\u88ab\u522b\u7684\u4efb\u52a1\u6240\u6301\u6709\u7684\u8d44\u6e90\u3002
\n3. \u8d44\u6e90\u4e0d\u80fd\u88ab\u4efb\u52a1\u62a2\u5360\uff0c\u4efb\u52a1\u5fc5\u987b\u628a\u8d44\u6e90\u91ca\u653e\u5f53\u4f5c\u666e\u901a\u4e8b\u4ef6\u3002
\n4. \u5faa\u73af\u7b49\u5f85\uff0c\u4e00\u4e2a\u4efb\u52a1\u7b49\u5f85\u5176\u4ed6\u4efb\u52a1\u6301\u6709\u7684\u8d44\u6e90\uff0c\u5176\u4ed6\u4efb\u52a1\u7b49\u5f85\u53e6\u4e00\u4e2a\u4efb\u52a1\u6301\u6709\u7684\u8d44\u6e90<\/p>\n\u751f\u4ea7\u8005\u3001\u6d88\u8d39\u8005\u7a0b\u5e8f\u3002wait \u548cnotify<\/h3>\n
import java.util.ArrayList;\n\npublic class ProducerAndCosumer {\n public static void main(String[] args) {\n SharedResource sharedResource = new SharedResource();\n new Thread(new Producer(sharedResource)).start();\n new Thread(new Consumer(sharedResource)).start();\n }\n\n}\n\nclass SharedResource {\n \/\/\u4ece\u751f\u4ea7\u8005\u53d1\u9001\u7ed9\u6d88\u8d39\u8005\u7684\u4fe1\u606f\n String message;\n \/\/\u5982\u679c\u6d88\u8d39\u8005\u7b49\u5f85\u751f\u4ea7\u8005\u751f\u4ea7 \u5219\u4e3atrue\uff1b \u5982\u679c\u751f\u4ea7\u8005\u7b49\u5f85\u6d88\u8d39\u8005\u62ff\u8d70\u6570\u636e\u5219\u8fd4\u56de false\n boolean empty = true;\n\n synchronized String take() {\n while (empty) {\n try {\n wait();\n } catch (InterruptedException e) {\n e.printStackTrace();\n }\n }\n \/\/\u72b6\u6001\u6539\u53d8\n empty = true;\n \/\/\u901a\u77e5\u751f\u4ea7\u8005\n notifyAll();\n return message;\n }\n\n\n synchronized void put(String msg) {\n \/\/\u6d88\u8d39\u8005\u672a\u68c0\u7d22\u5230\u6570\u636e\u524d\u4e0d\u5f97\u4f20\u9012\u65b0\u6570\u636e\n while (!empty) {\n try {\n wait();\n } catch (InterruptedException e) {\n e.printStackTrace();\n }\n }\n \/\/\u72b6\u6001\u6539\u53d8\n empty = false;\n \/\/\u5b58\u50a8\u6570\u636e\n this.message = msg;\n \/\/\u901a\u77e5\u6d88\u8d39\u8005\n notifyAll();\n }\n}\n\n\nclass Producer implements Runnable {\n SharedResource sharedResource = new SharedResource();\n\n public Producer(SharedResource sharedResource) {\n this.sharedResource = sharedResource;\n }\n\n @Override\n public void run() {\n String[] msgs = {\"a\", \"b\", \"c\", \"d\"};\n for (int i = 0; i < msgs.length; i++) {\n sharedResource.put(msgs[i]);\n System.out.println(\"producer is put : \" + msgs[i]);\n\n }\n sharedResource.put(\"Done\");\n }\n}\n\nclass Consumer implements Runnable {\n SharedResource sharedResource = new SharedResource();\n\n public Consumer(SharedResource sharedResource) {\n this.sharedResource = sharedResource;\n }\n\n @Override\n public void run() {\n while (true) {\n String msg = sharedResource.take();\n if (msg.equals(\"Done\")) break;\n else {\n System.out.println(\"consumer is take \uff1a\" + msg);\n\n }\n try {\n Thread.sleep(1000);\n } catch (InterruptedException e) {\n e.printStackTrace();\n }\n\n }\n\n }\n}\n<\/code><\/pre>\n\u9501 Lock<\/h3>\n
java.util.concurrent\u7c7b
\n\u521b\u5efa\uff1anew ReentrantLock()
\n\u9501\u5b9a\uff1aLock.lock()
\n\u91ca\u653e\uff1alokc.unlock(),\u5728finally\u8bed\u53e5\u4e2d<\/p>\n\n lock \u7684\u4f18\u52bf
\n 1. Lock\u53ef\u4ee5\u663e\u793a\u5730\u88ab\u521b\u5efa\u3001\u9501\u5b9a\u3001\u91ca\u653e\uff0c\u6bd4synchronized\u66f4\u52a0\u7075\u6d3b\u3002
\n 2. \u4f7f\u7528Synchronized\uff0c\u5982\u679c\u4e8b\u52a1\u5931\u8d25\uff0c\u5c31\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u4f46\u662f\u6ca1\u6709\u673a\u4f1a\u505a\u4efb\u4f55\u6e05\u7406\u5de5\u4f5c\uff0clock\u5728finally\u8bed\u53e5\u4e2d\u53ef\u4ee5unluck\uff0c\u5c06\u7cfb\u7edf\u7ef4\u62a4\u5728\u6b63\u786e\u7684\u72b6\u6001\u3002
\n 3. ReentrantLock\u5141\u8bb8\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u5982\u679c\u5176\u4ed6\u4eba\u5df2\u7ecf\u83b7\u53d6\u4e86\u4f60\u53ef\u4ee5\u51b3\u5b9a\u79bb\u5f00\u505a\u5176\u4ed6\u4e8b\u60c5\uff0c\u76f4\u81f3\u9501\u91ca\u653e\uff0c\u800c\u4e0d\u662f\u4e00\u76f4\u7b49\u5f85\u3002\n<\/p><\/blockquote>\nExecutor \u6267\u884c\u5668<\/h2>\n
\n \u4e0eThread\u3001Runnable\u521b\u5efa\u7ebf\u7a0b\u7684\u533a\u522b\uff1a\n<\/p><\/blockquote>\n
Thread\u3001Runnable\u9002\u7528\u4e8e\u5c0f\u578b\u5e94\u7528\uff0c\u4f46\u662f\u5728\u5927\u89c4\u6a21\u5e94\u7528\u4e2d\uff0c\u9700\u8981\u5c06\u7ebf\u7a0b\u7ba1\u7406\u548c\u521b\u5efa\u4e0e\u5e94\u7528\u7a0b\u5e8f\u7684\u5176\u4f59\u90e8\u5206\u5206\u5f00\uff0cExecutor\u5bf9\u8c61\u5c01\u88c5\u7ba1\u7406\u7ebf\u7a0b\u7684\u529f\u80fd\u3002<\/p>\n
\n \u4e09\u4e2a\u521b\u5efaExecutor\u5bf9\u8c61\u7684\u63a5\u53e3
\n 1. Executor \uff1anew Executor().execute(new Runnable),\u7b80\u5355\u7684\u63a5\u53e3
\n 2. ExecutorService \uff0cExecutor\u7684\u5b50\u63a5\u53e3\uff0c\u6dfb\u52a0\u4e86\u6709\u52a9\u4e8e\u7ba1\u7406\u751f\u547d\u5468\u671f\u7684\u529f\u80fd
\n 3. ScheduledExecutorService\u662fExecutorService\u7684\u5b50\u63a5\u53e3\uff0c\u652f\u6301\u5c06\u6765\u548c\/\u6216\u5b9a\u671f\u6267\u884c\u4efb\u52a1\u3002\n<\/p><\/blockquote>\n\u7ebf\u7a0b\u6c60<\/h2>\n
\n \u7ebf\u7a0b\u6c60\u662f\u4ec0\u4e48\uff1f\n<\/p><\/blockquote>\n
\u7ebf\u7a0b\u6c60\u5c31\u662f\u4e00\u7ec4\u7b49\u5f85\u4f5c\u4e1a\u7684\u5de5\u4f5c\u7ebf\u7a0b\u3002\u7ebf\u7a0b\u6c60\u4f1a\u521b\u5efa\u4e00\u7ec4\u56fa\u5b9a\u6570\u91cf\u7684\u7ebf\u7a0b\uff0c\u670d\u52a1\u5546\u4ece\u7ebf\u7a0b\u6c60\u4e2d\u62c9\u51fa\u4e00\u6761\u7ebf\u7a0b\u4e3a\u5176\u5206\u914d\u4f5c\u4e1a\u3002<\/p>\n
\n \u4e3a\u4ec0\u4e48\u8981\u7528\u7ebf\u7a0b\u6c60\uff1f\n<\/p><\/blockquote>\n
\u7ebf\u7a0b\u6c60\u56e0\u4e3a\u53ef\u4ee5\u521b\u5efa\u56fa\u5b9a\u7684\u7ebf\u7a0b\u6570\u91cf\uff0c\u56e0\u6b64\u4e0d\u7528\u4e3a\u6bcf\u4e2a\u4efb\u52a1\u90fd\u56fa\u5b9a\u5730\u4ed8\u51fa\u521b\u5efa\u7ebf\u7a0b\u7684\u5f00\u9500\uff0c\u56e0\u4e3a\u521b\u5efa\u7684\u7ebf\u7a0b\u6570\u91cf\u5f97\u5230\u9650\u5236\uff0c\u6240\u4ee5\u4e0d\u4f1a\u6ee5\u7528\u53ef\u83b7\u5f97\u7684\u8d44\u6e90\uff0c\u53ef\u4ee5\u5c3d\u5feb\u5730\u4e3a\u7cfb\u7edf\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n
\n \u7ebf\u7a0b\u6c60\u600e\u4e48\u521b\u5efa\uff1f\u600e\u4e48\u4f7f\u7528\uff1f\n<\/p><\/blockquote>\n
ExecutorService exec =Exectors.newFixedThreadPool(5);\nfor(int i = 0;i<5;i++>){\n exec.execute(new Runnable());\n}\nexec.shutdown()\n<\/code><\/pre>\n\u8bbe\u8ba1\u6a21\u5f0f<\/h1>\n
\u89c2\u5bdf\u8005\u6a21\u5f0f<\/h2>\n
\u5de5\u5382\u6a21\u5f0f<\/h2>\n
\u4ec0\u4e48\u662f\u5de5\u5382\u6a21\u5f0f\uff0c\u5177\u4f53\u89e3\u51b3\u54ea\u4e9b\u95ee\u9898<\/h3>\n
\u5de5\u5382\u987e\u540d\u601d\u4e49\u5c31\u662f\u5728\u5de5\u5382\u91cc\u521b\u5efa\u4ea7\u54c1\u7684\u6a21\u5f0f\uff0c\u5728\u7f16\u7a0b\u4e2d\u53ef\u4ee5\u5c06\u5de5\u5382\u7406\u89e3\u4e3a\u4e00\u4e2a\u63a5\u53e3\u6216\u8005\u62bd\u8c61\u7c7b\uff0c\u4ea7\u54c1\u53ef\u4ee5\u7406\u89e3\u4e3a\u9700\u8981\u521b\u5efa\u7684\u4e00\u4e2a\u6216\u4e00\u7ec4\u5bf9\u8c61\u3002\u5b9a\u4e49\u4e00\u4e2a\u5171\u540c\u7684\u5de5\u5382\u63a5\u53e3\uff0c\u901a\u8fc7\u5176\u5b50\u7c7b\u6765\u521b\u5efa\u4e0d\u540c\u7684\u5bf9\u8c61\u4ea7\u54c1\u3002\u4e3b\u8981\u5e94\u7528\u5728\uff1a\u6211\u4eec\u6709\u660e\u786e\u7684\u8ba1\u5212\u5728\u4e0d\u540c\u6761\u4ef6\u4e0b\u9700\u8981\u521b\u5efa\u4e0d\u4e00\u6837\u7684\u5b9e\u4f8b\u3002
\n\uff08\u62bd\u8c61\u5de5\u5382\u7c7b\uff1a\u4e3a\u521b\u5efa\u4e00\u7ec4\u76f8\u5173\u6216\u8005\u76f8\u4e92\u4f9d\u8d56\u7684\u5bf9\u8c61\u63d0\u4f9b\u4e00\u4e2a\u63a5\u53e3\uff0c\u5c24\u5176\u5b50\u7c7b\u9009\u62e9\u5b9e\u4f8b\u5316\uff09<\/p>\n\u4f18\u70b9<\/h3>\n
- \n
- \u4e00\u4e2a\u8c03\u7528\u8005\u60f3\u8981\u521b\u5efa\u5bf9\u8c61\uff0c\u53ea\u8981\u77e5\u9053\u5176\u540d\u5b57\u5c31\u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u6765\u521b\u5efa\u3002<\/li>\n
- \u6269\u5c55\u6027\u5f3a\uff0c\u5982\u679c\u589e\u52a0\u4e00\u4e2a\u4ea7\u54c1\uff0c\u53ea\u8981\u6269\u5c55\u5de5\u5382\u7c7b\u5c31\u53ef\u4ee5\u3002<\/li>\n
- \u5c4f\u853d\u4ea7\u54c1\u7684\u5177\u4f53\u5b9e\u73b0\uff0c\u8c03\u7528\u8005\u53ea\u9700\u8981\u5173\u5fc3\u4ea7\u54c1\u7684\u63a5\u53e3\u3002\uff08\u6846\u67b6-\u63d2\u4ef6\uff09<\/li>\n<\/ol>\n
\u7f3a\u70b9<\/h3>\n
\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u589e\u52a0\u4e86\u7cfb\u7edf\u7684\u590d\u6742\u5ea6\uff0c\u589e\u52a0\u4e86\u7c7b\u7684\u4f9d\u8d56\u3002\u5982\u679c\u662f\u7b80\u5355\u7684\u5bf9\u8c61\u53ea\u9700\u8981new\u5373\u53ef\u3002<\/p>\n
\u5de5\u5382\u6a21\u5f0f\u7684\u5e94\u7528<\/h3>\n
- \n
- \u6846\u67b6-\u63d2\u4ef6\uff0c\u6846\u67b6\u9009\u62e9\u8fd0\u884c\u54ea\u4e2a\u63d2\u4ef6<\/li>\n<\/ol>\n
\u5de5\u5382\u6a21\u5f0f\u7684\u5b9e\u73b0<\/h3>\n
\u5305\u62ec\u56db\u4e2a\u7c7b\uff1a
\n1. \u62bd\u8c61\u5de5\u5382\u7c7b\uff0cabstract class Factory\uff0c\u5b9a\u4e49\u65b9\u6cd5createProduct\uff1b
\n2. \u5177\u4f53\u5de5\u5382\u7c7b\uff0cclass Factory1\uff0c\u5b9e\u73b0createProduct\u65b9\u6cd5
\n3. \u62bd\u8c61\u4ea7\u54c1\u7c7b\uff0cabstract Porduct\uff0c\u5b9a\u4e49\u4ea7\u54c1\u76f8\u5173\u7684\u65b9\u6cd5method
\n4. \u5177\u4f53\u4ea7\u54c1\u7c7b\uff0cclass ProductA\uff0c\u5b9e\u73b0\u5177\u4f53\u65b9\u6cd5\u3002<\/p>\n\u5728\u5ba2\u6237\u7aef\u4e2d\uff0c\u5c06Factory\u57fa\u7c7b\u5bf9\u8c61\u7684\u5f15\u7528\u6307\u5411\u5177\u4f53\u5b50\u7c7b\uff0c\u8c03\u7528createProduct\u65b9\u6cd5\uff0c\u5b9e\u4f8b\u5316\u4ea7\u54c1\u7c7b\u3002\u4ea6\u53ef\u5c06\u4ea7\u54c1class\u540d\u79f0\u4f20\u5165createProduct\u53c2\u6570
,\u901a\u8fc7\u53cd\u5c04\u5b8c\u6210\u3002<\/p>\n WEB<\/h1>\n
http \u4e0e https \u7684\u533a\u522b<\/h2>\n
HTTP\u662f\u4e00\u79cd\u5ba2\u6237\u7aef-\u670d\u52a1\u5668\u534f\u8bae\uff1a\u8bf7\u6c42\u7531\u4e00\u4e2a\u5b9e\u4f53\uff0c\u7528\u6237\u4ee3\u7406\uff08\u6216\u4ee3\u8868\u5b83\u7684\u4ee3\u7406\uff09\u53d1\u9001\u3002 \u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u7528\u6237\u4ee3\u7406\u662fWeb\u6d4f\u89c8\u5668\uff0c\u4f46\u4e5f\u53ef\u4ee5\u662f\u4efb\u4f55\u4e1c\u897f\uff0c\u4f8b\u5982\uff0c\u53ef\u4ee5\u722c\u7f51\u4ee5\u586b\u5145\u548c\u7ef4\u62a4\u641c\u7d22\u5f15\u64ce\u7d22\u5f15\u7684\u673a\u5668\u4eba\u3002 \u6bcf\u4e2a\u5355\u72ec\u7684\u8bf7\u6c42\u90fd\u53d1\u9001\u5230\u670d\u52a1\u5668\uff0c\u7531\u8be5\u670d\u52a1\u5668\u5904\u7406\u5e76\u63d0\u4f9b\u7b54\u6848\uff08\u79f0\u4e3a\u54cd\u5e94\uff09\u3002 \u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u6709\u8bb8\u591a\u5b9e\u4f53\uff08\u7edf\u79f0\u4e3a\u4ee3\u7406\uff09\uff0c\u5b83\u4eec\u6267\u884c\u4e0d\u540c\u7684\u64cd\u4f5c\u5e76\u5145\u5f53\u7f51\u5173\u6216\u7f13\u5b58\u3002<\/p>\n
\u5b9e\u9645\u4e0a\uff0c\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u6709\u66f4\u591a\u5904\u7406\u8bf7\u6c42\u7684\u8ba1\u7b97\u673a\uff1a\u8def\u7531\u5668\uff0c\u8c03\u5236\u89e3\u8c03\u5668\u7b49\u3002 \u7531\u4e8eWeb\u7684\u5206\u5c42\u8bbe\u8ba1\uff0c\u8fd9\u4e9b\u9690\u85cf\u5728\u7f51\u7edc\u548c\u4f20\u8f93\u5c42\u4e2d\u3002 HTTP\u5728\u5e94\u7528\u7a0b\u5e8f\u5c42\u4e4b\u4e0a\u3002 \u5c3d\u7ba1\u5bf9\u4e8e\u8bca\u65ad\u7f51\u7edc\u95ee\u9898\u5f88\u91cd\u8981\uff0c\u4f46\u662f\u5e95\u5c42\u51e0\u4e4e\u4e0eHTTP\u7684\u63cf\u8ff0\u65e0\u5173\u3002<\/p>\n
http \u5e94\u7528\u5c42\u534f\u8bae \u53ef\u6269\u5c55\u7684\u534f\u8bae header\u4e2d\u6269\u5c55\u529f\u80fd\u3002
\n\u53d1\u9001\u8bf7\u6c42\u65f6\u5019\uff0c\u5148\u53d1\u9001\u7b80\u5355\u7684\u8bf7\u6c42\uff0c\u7136\u540e\u6d4f\u89c8\u5668\u8fdb\u884c\u89e3\u6790\uff0c\u89e3\u6790\u51fa\u811a\u672c\u3001CSS\u4ee5\u53caImage\u3001videos\u7b49\u8d44\u6e90\u89e3\u6790\u51fa\u6765\uff0c\u7ee7\u7eed\u53d1\u9001\u8bf7\u6c42\u3002Web\u5c06\u8fd9\u4e9b\u8d44\u6e90\u8d44\u6e90\u6574\u5408\u5c55\u73b0\u7ed9\u7528\u6237
\n\u670d\u52a1\u5668\u4e0d\u4f1a\u53d1\u8d77\u8bf7\u6c42<\/p>\nhttp2.0 \u53d1\u9001\u7684\u4fe1\u606f\u4e0d\u53ef\u8bfb\uff0c\u5bf9http1.0\u8fdb\u884c\u5c01\u88c5<\/p>\n
HTTP\u6d41\u7a0b<\/h2>\n
\n \u6d4f\u89c8\u5668\u8f93\u5165google.com\u540e\u4f1a\u51fa\u73b0\u4ec0\u4e48\uff1f\n<\/p><\/blockquote>\n
- \n
- \u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u4f1a\u5efa\u7acb\u4e00\u4e2aTCP\u8fde\u63a5\u3002\u5f53\u8f93\u5165google.com\u65f6\uff0c\u6d4f\u89c8\u5668\u8ba4\u4e3a\u8f93\u5165\u7684\u662f\u4e00\u4e2aURL\uff0c\u5e76\u6dfb\u52a0HTTP\u534f\u8bae\uff0c\u91c7\u7528\u9ed8\u8ba4\u503c\u4f8b\u5982\u7aef\u53e380\uff0cGET\u65b9\u6cd5\uff0c\u57fa\u672c\u8eab\u4efd\u9a8c\u8bc1\u3002\u7136\u540e\u521b\u5efaHTTP\u8bf7\u6c42\uff0cDNS\u89e3\u6790\u57df\u540d \u83b7\u5f97IP\u5730\u5740\uff0cIP\u5730\u5740\u4e0d\u6b62\u4e00\u4e2a\uff0c\u4f46\u662f\u6d4f\u89c8\u5668\u4f1a\u6709\u9ed8\u8ba4\u7684IP\uff0c\u7136\u540e\u6d4f\u89c8\u5668\u4e0e\u670d\u52a1\u5668\u5efa\u7acbTCP\u8fde\u63a5\uff0c\u6709\u53ef\u80fd\u4f1a\u8fd4\u56de301\u72b6\u6001\u7684\u54cd\u5e94\uff0c\u8bf4\u660e\u7f51\u9875\u9700\u8981\u91cd\u5b9a\u5411\uff0cHTTP\u5c06\u4f1a\u6839\u636eheader\u91cc\u9762\u7684location\u503c\u786e\u5b9a\u8df3\u8f6c\u7684\u7f51\u9875\u3002<\/li>\n
- \u53d1\u9001\u4e00\u4e2aHTTPmessage\uff0chttp1.0\u53ef\u8bfb http2.0\u4e0d\u53ef\u8bfb\u3002\u53ef\u80fd\u9700\u8981\u4e00\u4e9b\u989d\u5916\u7684\u7f51\u7edc\u8bf7\u6c42-\u6211\u53ef\u80fd\u5df2\u7ecf\u6709\u4e00\u4e2aCookie\u6216\u5e26\u6709OAuth\u4ee4\u724c\u7684\u672c\u5730\u5b58\u50a8-\u6216\u6211\u6b63\u5728\u4f7f\u7528Chrome\uff0c\u5b83\u5df2\u7ecf\u77e5\u9053\u6211\u662f\u8c01\uff0c\u5e76\u4e14\u5e26\u6709\u8eab\u4efd\u9a8c\u8bc1\u7684\u8bf7\u6c42\u4f1a\u53d1\u9001\u5230\u4ed6\u4eec\u7684Google+ API\uff0c\u8be5\u4fe1\u606f\u4f1a\u544a\u8bc9Google\u641c\u7d22\u9875\u9762\u5e94\u7528\u7a0b\u5e8f\u6211\u662f\u8c01\u3002<\/li>\n
- \u670d\u52a1\u5668\u7aef\u8fd4\u56deresponse\uff0c\u6d4f\u89c8\u5668\u4f1a\u89e3\u6790\u8fd9\u4e2aresponse\uff0c\u89e3\u6790\u51fa\u5176\u4e2d\u53ef\u6267\u884c\u811a\u672c\u3001\u56fe\u7247\u89c6\u9891\u7b49\uff0c\u5bf9\u5176\u8fdb\u884c\u6e32\u67d3\uff0c\u89e3\u6790\u5b8c\u540e\u4f1a\u5c06\u6240\u6709\u7684response\u6574\u5408\u3002<\/li>\n
- \u5982\u679c\u662fhttp1.0\u4f1a\u5173\u95ed\u8fde\u63a5\uff0c2.0\u548c1.1\u4e0d\u4f1a\u5173\u95ed \u4f1a\u6839\u636eheader\u4e2dconnecion\u786e\u8ba4\u662f\u5426\u5173\u95ed\u3002<\/li>\n<\/ol>\n
Socket<\/h1>\n
spring \u4e0e\u5fae\u670d\u52a1<\/h1>\n
spring<\/h2>\n
- \n
- spring \u7684\u4f18\u52bf\uff1f
\n\u4e00\u822c\u7684\u7cfb\u7edf\u4e4b\u95f4\u7c7b\u4e0e\u7c7b\u7684\u8054\u7cfb\u662f\u901a\u8fc7\u8c03\u7528\u7c7b\u5bf9\u8c61\u7684\u6784\u9020\u5668\uff0c\u786c\u7f16\u7801\u5728\u4ee3\u7801\u4e2d\uff0c\u8fd9\u6837\u7684\u4ee3\u7801\u8026\u5408\u5ea6\u9ad8\uff0c\u53ef\u590d\u7528\u6027\u4ee5\u53ca\u6269\u5c55\u6027\u5dee\uff0c\u4e00\u65e6\u4fee\u6539\u4e00\u4e2a\u7c7b\u5176\u4ed6\u7684\u7c7b\u5c31\u6709\u5f71\u54cd\u3002Spring\u901a\u8fc7\u4f9d\u8d56\u6ce8\u5165\u7684\u65b9\u5f0f\uff0c\u901a\u8fc7\u4e00\u4e9b\u7ea6\u5b9a\uff0c\u6bd4\u5982XML\u6620\u5c04\u7c7b\u540d\u4e0e\u7c7b\u6587\u4ef6\u3001\u6216\u8005\u6ce8\u89e3\u7684\u65b9\u5f0f\uff0c\u901a\u8fc7\u53cd\u5c04\u673a\u5236\uff0c\u52a8\u6001\u5730\u521b\u5efa\u7c7b\u5bf9\u8c61\uff0c\u4f7f\u5f97\u6846\u67b6\u7684\u6269\u5c55\u6027\u5f97\u5230\u63d0\u9ad8\u3002\u540c\u65f6Spring\u652f\u6301JDBC\u673a\u5236\uff0c\u63d0\u9ad8\u6570\u636e\u5e93\u8bbf\u95ee\u6548\u7387\u3002<\/p>\n<\/li>\n - \n
spring \u600e\u4e48\u5b9e\u73b0\u8fd9\u4e2a\u4f18\u52bf\uff1f
\n\u4f9d\u8d56\u6ce8\u5165<\/p>\n<\/li>\n - spring\u4e3a\u4ec0\u4e48\u53ef\u4ee5\u5fae\u670d\u52a1\uff1f
\n\u4f18\u52bf\uff0c\u4f9d\u8d56\u6ce8\u5165\u3001\u53cd\u5c04\u3001AOP\uff0cioc<\/li>\n<\/ol>\nSpring AOP\u652f\u6301\u5728Spring\u5e94\u7528\u7a0b\u5e8f\u4e2d\u8fdb\u884c\u9762\u5411\u65b9\u9762\u7684\u7f16\u7a0b\u3002\u5728AOP\u4e2d\uff0c\u5404\u65b9\u9762\u53ef\u5b9e\u73b0\u5173\u6ce8\u7684\u6a21\u5757\u5316\uff0c\u4f8b\u5982\u4e8b\u52a1\u7ba1\u7406\uff0c\u65e5\u5fd7\u8bb0\u5f55\u6216\u8de8\u591a\u79cd\u7c7b\u578b\u548c\u5bf9\u8c61\u7684\u5b89\u5168\u6027\uff08\u901a\u5e38\u79f0\u4e3a\u6a2a\u5207\u5173\u6ce8\uff09\u3002<\/p>\n
AOP\u63d0\u4f9b\u4e86\u4e00\u79cd\u4f7f\u7528\u7b80\u5355\u7684\u53ef\u63d2\u62d4\u914d\u7f6e\u5728\u5b9e\u9645\u903b\u8f91\u4e4b\u524d\uff0c\u4e4b\u540e\u6216\u5468\u56f4\u52a8\u6001\u6dfb\u52a0\u6a2a\u5207\u5173\u6ce8\u70b9\u7684\u65b9\u6cd5\u3002\u73b0\u5728\u548c\u73b0\u5728\uff0c\u7ef4\u62a4\u4ee3\u7801\u90fd\u5f88\u5bb9\u6613\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u66f4\u6539\u914d\u7f6e\u6587\u4ef6\u6765\u6dfb\u52a0\/\u5220\u9664\u5173\u6ce8\u70b9\uff0c\u800c\u65e0\u9700\u91cd\u65b0\u7f16\u8bd1\u5b8c\u6574\u7684\u6e90\u4ee3\u7801\uff08\u5982\u679c\u60a8\u8981\u4f7f\u7528\u8981\u6c42XML\u914d\u7f6e\u7684\u65b9\u9762\uff09\u3002<\/p>\n
spring boot<\/h2>\n
- \n
- \u4f18\u52bf\uff1a<\/li>\n<\/ol>\n
– \u5185\u5d4c\u4e86servlet\u5bb9\u5668\uff0c\u964d\u4f4e\u4e86\u5bf9\u73af\u5883\u7684\u8981\u6c42\u3002
\n– \u907f\u514d\u4e86\u7f16\u5199XML\u914d\u7f6e\uff0c\u901a\u8fc7\u6807\u6ce8\u5b8c\u6210\u4f9d\u8d56\u6ce8\u5165\u3002
\n– \u4e0eSpring\u751f\u6001\u66f4\u5bb9\u6613\u96c6\u6210
\n1. \u8fc7\u7a0b<\/p>\nREST<\/h2>\n
\u6d4b\u8bd5<\/h1>\n
Juit<\/p>\n
\u6570\u636e\u5e93<\/h1>\n
\u67e5\u627e\u5927\u6570\u636e\uff0c\u5982\u4f55\u4f18\u5316\u6027\u80fd\uff1f
\n1. \u8868\u8bbe\u8ba1\uff1a\u8bed\u6cd5\u65b9\u9762\u6bd4\u5982\u907f\u514d\u51fa\u73b0null\uff0c\u75280\u4ee3\u66ff\u3002\u4f7f\u7528int\u4ee3\u66ffbigint\uff0c\u7528\u679a\u4e3e\u6574\u578b\u4ee3\u66ff\u5b57\u7b26\u4e32\u7b49
\n2. \u5efa\u7acb\u7d22\u5f15\uff0c\u5728where\u6216\u8005orderby\u547d\u4ee4\u4e0a\u6d89\u53ca\u7684\u5217\u5efa\u7acb\u7d22\u5f15\u3002
\n3. \u6570\u636e\u5e93\u5f15\u64ce\uff0cmyISAM\u4ee5\u53caINNODB\uff0c\u524d\u8005\u901f\u5ea6\u5feb\u4f46\u662f\u529f\u80fd\u5c11\uff0c\u4e0d\u652f\u6301\u4e8b\u52a1\u5916\u952e\u7b49\u3002innodb\u652f\u6301\u3002
\n4. \u5206\u533a\uff0c\u6570\u636e\u5e93\u4e00\u5f20\u8868\u5bf9\u5e94\u4e86\u4e09\u4e2a\u6587\u4ef6\uff0c\u5206\u522b\u5b58\u653e\u8868\u7ed3\u6784\u3001\u8868\u6570\u636e\u3001\u8868\u7d22\u5f15\uff0c\u5982\u679c\u4e00\u5f20\u8868\u7684\u6570\u636e\u91cf\u592a\u5927\u7684\u8bdd\uff0c\u90a3\u4e48myd,myi\u5c31\u4f1a\u53d8\u7684\u5f88\u5927\uff0c\u67e5\u627e\u6570\u636e\u5c31\u4f1a\u53d8\u7684\u5f88\u6162\uff0c\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u53ef\u4ee5\u5229\u7528mysql\u7684\u5206\u533a\u529f\u80fd\uff0c\u5728\u7269\u7406\u4e0a\u5c06\u8fd9\u4e00\u5f20\u8868\u5bf9\u5e94\u7684\u4e09\u4e2a\u6587\u4ef6\uff0c\u5206\u5272\u6210\u8bb8\u591a\u4e2a\u5c0f\u5757\uff0c\u8fd9\u6837\u5462\uff0c\u6211\u4eec\u67e5\u627e\u4e00\u6761\u6570\u636e\u65f6\uff0c\u5c31\u4e0d\u7528\u5168\u90e8\u67e5\u627e\u4e86\uff0c\u53ea\u8981\u77e5\u9053\u8fd9\u6761\u6570\u636e\u5728\u54ea\u4e00\u5757\uff0c\u7136\u540e\u5728\u90a3\u4e00\u5757\u627e\u5c31\u884c\u4e86\u3002<\/p>\n\u7f51\u7edc<\/h1>\n
\u7b80\u5386<\/h1>\n
Beego\u7684\u7279\u6027 \u4e0eSpring\u7684\u533a\u522b<\/h2>\n
Golang\u4e0ejava\u7684\u4e0d\u540c<\/h2>\n
go\u8bed\u8a00\u6027\u80fd\u597d \u56e0\u4e3a\u5b83\u662f\u57fa\u4e8eC\u8bed\u8a00\u5f00\u53d1\u7684\uff0c\u76f4\u63a5\u7f16\u8bd1\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u800c\u4e0d\u4f9d\u8d56\u4e8e\u865a\u62df\u673a\u3002\u4f46\u662f\u865a\u62df\u673a\u5e2e\u52a9java\u652f\u6301\u8de8\u5e73\u53f0\u8fd0\u884c\uff0cGo\u5219\u9700\u8981\u5bf9\u6bcf\u4e2a\u5e73\u53f0\u7f16\u5199\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002<\/p>\n
Golang\u591a\u7ebf\u7a0b<\/h2>\n
golang\u591a\u7ebf\u7a0b\u5b9e\u73b0\u673a\u5236\u53eb\u505agoruntine\uff0c\u521b\u5efa\u591a\u7ebf\u7a0b\u7684\u8bed\u6cd5\u7b80\u5355\u3002go +\u7ebf\u7a0b\u65b9\u6cd5\uff0cgo\u521b\u5efa\u7684\u662f\u8f7b\u91cf\u7ea7\u7ebf\u7a0b\uff0c\u79f0\u4e3a\u534f\u7a0b\uff0c\u662f\u5bf9\u5e95\u5c42IO\u64cd\u4f5c\u7684\u5305\u88c5\uff0c\u4ece\u800c\u51cf\u5c11\u7ebf\u7a0b\u521b\u5efa\u7684\u6d88\u8017\u3002\u56e0\u6b64\u548cjava\u6bd4\u8d77\u6765\uff0c\u5728\u591a\u7ebf\u7a0b\u65b9\u9762go\u5185\u5b58\u5360\u7528\u5c0f\u3002<\/p>\n
Restful API\u4e0e\u666e\u901aAPI\u533a\u522b\uff0c\u5982\u4f55\u8bbe\u8ba1\uff0cGET\u3001PUT\u5728\u4ec0\u4e48\u573a\u666f\u4e0b\u4f7f\u7528<\/h2>\n","protected":false},"excerpt":{"rendered":"
java \u9762\u5411\u5bf9\u8c61 \u5c01\u88c5 \u7ee7\u627f \u591a\u6001 \u6784\u9020\u5668\u987a\u5e8f \u5355\u6839\u7ee7\u627f \u6cdb\u578b final \u5173\u952e\u5b57 \u5e8f\u5217\u5316 \u5185\u5b58\u6ea2\u51fa\u548c\u5185\u5b58\u6cc4…<\/p>\n
- \u4f18\u52bf\uff1a<\/li>\n<\/ol>\n
- spring \u7684\u4f18\u52bf\uff1f
- \u6846\u67b6-\u63d2\u4ef6\uff0c\u6846\u67b6\u9009\u62e9\u8fd0\u884c\u54ea\u4e2a\u63d2\u4ef6<\/li>\n<\/ol>\n
- Golang\u4e0ejava\u7684\u4e0d\u540c<\/a><\/li>\n
- spring boot<\/a><\/li>\n
- HTTP\u6d41\u7a0b<\/a><\/li>\n<\/ul>\n<\/li>\n
- \u4f18\u70b9<\/a><\/li>\n
- \u5de5\u5382\u6a21\u5f0f<\/a>\n
- \u539f\u5b50\u64cd\u4f5c aotomic access<\/a><\/li>\n
- \u591a\u7ebf\u7a0b<\/a>\n
- list<\/a>\n
- \u52a8\u6001\u4ee3\u7406\u7b49<\/a><\/li>\n
- \u7ee7\u627f<\/a><\/li>\n
- \u5c01\u88c5<\/a><\/li>\n