{"id":201312,"date":"2025-05-10T09:34:36","date_gmt":"2025-05-10T01:34:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201312\/"},"modified":"2025-05-10T09:34:36","modified_gmt":"2025-05-10T01:34:36","slug":"%e4%b8%80%e6%96%87%e6%90%9e%e6%87%82redis%e4%b8%adstring%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201312\/","title":{"rendered":"\u4e00\u6587\u641e\u61c2Redis\u4e2dString\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u4e00\u6587\u641e\u61c2Redis\u4e2dString\u6570\u636e\u7c7b\u578b<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300a\u4e00\u6587\u641e\u61c2Redis\u4e2dString\u6570\u636e\u7c7b\u578b\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\u6570\u636e\u7c7b\u578b\u3001redisstring\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n<h2>\u6982\u8ff0\uff1a<\/h2>\n<p>\u5b57\u7b26\u4e32\u7c7b\u578b\u662fRedis\u4e2d\u6700\u4e3a\u57fa\u7840\u7684\u6570\u636e\u5b58\u50a8\u7c7b\u578b\uff0c\u5b83\u5728Redis\u4e2d\u662f\u4e8c\u8fdb\u5236\u5b89\u5168\u7684\uff0c\u8fd9\u4fbf\u610f\u5473\u7740\u8be5\u7c7b\u578b\u53ef\u4ee5\u63a5\u53d7\u4efb\u4f55\u683c\u5f0f\u7684\u6570\u636e\uff0c\u5982JPEG\u56fe\u50cf\u6570\u636e\u6216Json\u5bf9\u8c61\u63cf\u8ff0\u4fe1\u606f\u7b49\u3002\u5728Redis\u4e2d\u5b57\u7b26\u4e32\u7c7b\u578b\u7684Value\u6700\u591a\u53ef\u4ee5\u5bb9\u7eb3\u7684\u6570\u636e\u957f\u5ea6\u662f512M\u3002<\/p>\n<h2>\u76f8\u5173\u547d\u4ee4\u5217\u8868\uff1a<\/h2>\n<table>\n<tbody>\n<tr>\n<td><strong>\u547d\u4ee4\u539f\u578b<\/strong><\/td>\n<td><strong>\u65f6\u95f4\u590d\u6742\u5ea6<\/strong><\/td>\n<td><strong>\u547d\u4ee4\u63cf\u8ff0<\/strong><\/td>\n<td><strong>\u8fd4\u56de\u503c<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>APPEND<\/strong><\/td>\n<td>O(1)&nbsp;<\/td>\n<td>\u5982\u679c\u8be5Key\u5df2\u7ecf\u5b58\u5728\uff0cAPPEND\u547d\u4ee4\u5c06\u53c2\u6570Value\u7684\u6570\u636e\u8ffd\u52a0\u5230\u5df2\u5b58\u5728Value\u7684\u672b\u5c3e\u3002\u5982\u679c\u8be5Key\u4e0d\u5b58\u5728\uff0cAPPEND\u547d\u4ee4\u5c06\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Key\/Value\u3002<\/td>\n<td>\u8ffd\u52a0\u540eValue\u7684\u957f\u5ea6\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>DECR<\/strong><\/td>\n<td>O(1) &nbsp;<\/td>\n<td>\n<p>\u5c06\u6307\u5b9aKey\u7684Value\u539f\u5b50\u6027\u7684\u9012\u51cf1\u3002\u5982\u679c\u8be5Key\u4e0d\u5b58\u5728\uff0c\u5176\u521d\u59cb\u503c\u4e3a0\uff0c\u5728decr\u4e4b\u540e\u5176\u503c\u4e3a-1\u3002\u5982\u679cValue\u7684\u503c\u4e0d\u80fd\u8f6c\u6362\u4e3a\u6574\u578b\u503c\uff0c\u5982Hello\uff0c\u8be5\u64cd\u4f5c\u5c06\u6267\u884c\u5931\u8d25<\/p>\n<p>\u5e76\u8fd4\u56de\u76f8\u5e94\u7684\u9519\u8bef\u4fe1\u606f\u3002\u6ce8\u610f\uff1a\u8be5\u64cd\u4f5c\u7684\u53d6\u503c\u8303\u56f4\u662f64\u4f4d\u6709\u7b26\u53f7\u6574\u578b\u3002<\/p>\n<\/td>\n<td>\u9012\u51cf\u540e\u7684Value\u503c\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>INCR<\/strong><\/td>\n<td>O(1) &nbsp;<\/td>\n<td>\n<p>\u5c06\u6307\u5b9aKey\u7684Value\u539f\u5b50\u6027\u7684\u9012\u589e1\u3002\u5982\u679c\u8be5Key\u4e0d\u5b58\u5728\uff0c\u5176\u521d\u59cb\u503c\u4e3a0\uff0c\u5728incr\u4e4b\u540e\u5176\u503c\u4e3a1\u3002\u5982\u679cValue\u7684\u503c\u4e0d\u80fd\u8f6c\u6362\u4e3a\u6574\u578b\u503c\uff0c\u5982Hello\uff0c\u8be5\u64cd\u4f5c\u5c06\u6267\u884c\u5931\u8d25<\/p>\n<p>\u5e76\u8fd4\u56de\u76f8\u5e94\u7684\u9519\u8bef\u4fe1\u606f\u3002\u6ce8\u610f\uff1a\u8be5\u64cd\u4f5c\u7684\u53d6\u503c\u8303\u56f4\u662f64\u4f4d\u6709\u7b26\u53f7\u6574\u578b\u3002&nbsp;<\/p>\n<\/td>\n<td>\u9012\u589e\u540e\u7684Value\u503c\u3002&nbsp;<\/td>\n<\/tr>\n<tr>\n<td><strong>DECRBY<\/strong>&nbsp;<\/td>\n<td>O(1)<\/td>\n<td>\n<p>\u5c06\u6307\u5b9aKey\u7684Value\u539f\u5b50\u6027\u7684\u51cf\u5c11decrement\u3002\u5982\u679c\u8be5Key\u4e0d\u5b58\u5728\uff0c\u5176\u521d\u59cb\u503c\u4e3a0\uff0c\u5728decrby\u4e4b\u540e\u5176\u503c\u4e3a-decrement\u3002\u5982\u679cValue\u7684\u503c\u4e0d\u80fd\u8f6c\u6362\u4e3a\u6574\u578b\u503c\uff0c<\/p>\n<p>\u5982Hello\uff0c\u8be5\u64cd\u4f5c\u5c06\u6267\u884c\u5931\u8d25\u5e76\u8fd4\u56de\u76f8\u5e94\u7684\u9519\u8bef\u4fe1\u606f\u3002\u6ce8\u610f\uff1a\u8be5\u64cd\u4f5c\u7684\u53d6\u503c\u8303\u56f4\u662f64\u4f4d\u6709\u7b26\u53f7\u6574\u578b\u3002&nbsp;<\/p>\n<\/td>\n<td>\u51cf\u5c11\u540e\u7684Value\u503c\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>INCRBY<\/strong><\/td>\n<td>O(1)&nbsp;<\/td>\n<td>\n<p>\u5c06\u6307\u5b9aKey\u7684Value\u539f\u5b50\u6027\u7684\u589e\u52a0increment\u3002\u5982\u679c\u8be5Key\u4e0d\u5b58\u5728\uff0c\u5176\u521d\u59cb\u503c\u4e3a0\uff0c\u5728incrby\u4e4b\u540e\u5176\u503c\u4e3aincrement\u3002\u5982\u679cValue\u7684\u503c\u4e0d\u80fd\u8f6c\u6362\u4e3a\u6574\u578b\u503c\uff0c\u5982Hello\uff0c<\/p>\n<p>\u8be5\u64cd\u4f5c\u5c06\u6267\u884c\u5931\u8d25\u5e76\u8fd4\u56de\u76f8\u5e94\u7684\u9519\u8bef\u4fe1\u606f\u3002\u6ce8\u610f\uff1a\u8be5\u64cd\u4f5c\u7684\u53d6\u503c\u8303\u56f4\u662f64\u4f4d\u6709\u7b26\u53f7\u6574\u578b\u3002&nbsp;<\/p>\n<\/td>\n<td>\u589e\u52a0\u540e\u7684Value\u503c\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>GET<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\u83b7\u53d6\u6307\u5b9aKey\u7684Value\u3002\u5982\u679c\u4e0e\u8be5Key\u5173\u8054\u7684Value\u4e0d\u662fstring\u7c7b\u578b\uff0cRedis\u5c06\u8fd4\u56de\u9519\u8bef\u4fe1\u606f\uff0c\u56e0\u4e3aGET\u547d\u4ee4\u53ea\u80fd\u7528\u4e8e\u83b7\u53d6string Value\u3002&nbsp;<\/td>\n<td>\u4e0e\u8be5Key\u76f8\u5173\u7684Value\uff0c\u5982\u679c\u8be5Key\u4e0d\u5b58\u5728\uff0c\u8fd4\u56denil\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>SET<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\u8bbe\u5b9a\u8be5Key\u6301\u6709\u6307\u5b9a\u7684\u5b57\u7b26\u4e32Value\uff0c\u5982\u679c\u8be5Key\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u8986\u76d6\u5176\u539f\u6709\u503c\u3002<\/td>\n<td>\u603b\u662f\u8fd4\u56de&#8221;OK&#8221;\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>GETSET<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\u539f\u5b50\u6027\u7684\u8bbe\u7f6e\u8be5Key\u4e3a\u6307\u5b9a\u7684Value\uff0c\u540c\u65f6\u8fd4\u56de\u8be5Key\u7684\u539f\u6709\u503c\u3002\u548cGET\u547d\u4ee4\u4e00\u6837\uff0c\u8be5\u547d\u4ee4\u4e5f\u53ea\u80fd\u5904\u7406string Value\uff0c\u5426\u5219Redis\u5c06\u7ed9\u51fa\u76f8\u5173\u7684\u9519\u8bef\u4fe1\u606f\u3002<\/td>\n<td>\u8fd4\u56de\u8be5Key\u7684\u539f\u6709\u503c\uff0c\u5982\u679c\u8be5Key\u4e4b\u524d\u5e76\u4e0d\u5b58\u5728\uff0c\u5219\u8fd4\u56denil\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>STRLEN<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\u8fd4\u56de\u6307\u5b9aKey\u7684\u5b57\u7b26\u503c\u957f\u5ea6\uff0c\u5982\u679cValue\u4e0d\u662fstring\u7c7b\u578b\uff0cRedis\u5c06\u6267\u884c\u5931\u8d25\u5e76\u7ed9\u51fa\u76f8\u5173\u7684\u9519\u8bef\u4fe1\u606f\u3002<\/td>\n<td>\u8fd4\u56de\u6307\u5b9aKey\u7684Value\u5b57\u7b26\u957f\u5ea6\uff0c\u5982\u679c\u8be5Key\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de0\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>SETEX<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\u539f\u5b50\u6027\u5b8c\u6210\u4e24\u4e2a\u64cd\u4f5c\uff0c\u4e00\u662f\u8bbe\u7f6e\u8be5Key\u7684\u503c\u4e3a\u6307\u5b9a\u5b57\u7b26\u4e32\uff0c\u540c\u65f6\u8bbe\u7f6e\u8be5Key\u5728Redis\u670d\u52a1\u5668\u4e2d\u7684\u5b58\u6d3b\u65f6\u95f4(\u79d2\u6570)\u3002\u8be5\u547d\u4ee4\u4e3b\u8981\u5e94\u7528\u4e8eRedis\u88ab\u5f53\u505aCache\u670d\u52a1\u5668\u4f7f\u7528\u65f6\u3002<\/td>\n<td>&nbsp;<\/td>\n<\/tr>\n<tr>\n<td><strong>SETNX<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\u5982\u679c\u6307\u5b9a\u7684Key\u4e0d\u5b58\u5728\uff0c\u5219\u8bbe\u5b9a\u8be5Key\u6301\u6709\u6307\u5b9a\u5b57\u7b26\u4e32Value\uff0c\u6b64\u65f6\u5176\u6548\u679c\u7b49\u4ef7\u4e8eSET\u547d\u4ee4\u3002\u76f8\u53cd\uff0c\u5982\u679c\u8be5Key\u5df2\u7ecf\u5b58\u5728\uff0c\u8be5\u547d\u4ee4\u5c06\u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c\u5e76\u8fd4\u56de\u3002<\/td>\n<td>1\u8868\u793a\u8bbe\u7f6e\u6210\u529f\uff0c\u5426\u52190\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>SETRANGE &nbsp;<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\n<p>\u66ff\u6362\u6307\u5b9aKey\u7684\u90e8\u5206\u5b57\u7b26\u4e32\u503c\u3002\u4eceoffset\u5f00\u59cb\uff0c\u66ff\u6362\u7684\u957f\u5ea6\u4e3a\u8be5\u547d\u4ee4\u7b2c\u4e09\u4e2a\u53c2\u6570value\u7684\u5b57\u7b26\u4e32\u957f\u5ea6\uff0c\u5176\u4e2d\u5982\u679coffset\u7684\u503c\u5927\u4e8e\u8be5Key\u7684\u539f\u6709\u503cValue\u7684\u5b57\u7b26\u4e32\u957f\u5ea6\uff0c<\/p>\n<p>Redis\u5c06\u4f1a\u5728Value\u7684\u540e\u9762\u8865\u9f50(offset &#8211; strlen(value))\u6570\u91cf\u76840x00\uff0c\u4e4b\u540e\u518d\u8ffd\u52a0\u65b0\u503c\u3002\u5982\u679c\u8be5\u952e\u4e0d\u5b58\u5728\uff0c\u8be5\u547d\u4ee4\u4f1a\u5c06\u5176\u539f\u503c\u7684\u957f\u5ea6\u5047\u8bbe\u4e3a0\uff0c\u5e76\u5728\u5176\u540e\u6dfb\u8865offset\u4e2a<\/p>\n<p>0x00\u540e\u518d\u8ffd\u52a0\u65b0\u503c\u3002\u9274\u4e8e\u5b57\u7b26\u4e32Value\u7684\u6700\u5927\u957f\u5ea6\u4e3a512M\uff0c\u56e0\u6b64offset\u7684\u6700\u5927\u503c\u4e3a536870911\u3002\u6700\u540e\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u8be5\u547d\u4ee4\u5728\u6267\u884c\u65f6\u81f4\u4f7f\u6307\u5b9aKey\u7684\u539f\u6709\u503c<\/p>\n<p>\u957f\u5ea6\u589e\u52a0\uff0c\u8fd9\u5c06\u4f1a\u5bfc\u81f4Redis\u91cd\u65b0\u5206\u914d\u8db3\u591f\u7684\u5185\u5b58\u4ee5\u5bb9\u7eb3\u66ff\u6362\u540e\u7684\u5168\u90e8\u5b57\u7b26\u4e32\uff0c\u56e0\u6b64\u5c31\u4f1a\u5e26\u6765\u4e00\u5b9a\u7684\u6027\u80fd\u6298\u635f\u3002&nbsp;<\/p>\n<\/td>\n<td>\u4fee\u6539\u540e\u7684\u5b57\u7b26\u4e32Value\u957f\u5ea6\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>GETRANGE<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\n<p>\u5982\u679c\u622a\u53d6\u7684\u5b57\u7b26\u4e32\u957f\u5ea6\u5f88\u77ed\uff0c\u6211\u4eec\u53ef\u4ee5\u8be5\u547d\u4ee4\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u89c6\u4e3aO(1)\uff0c\u5426\u5219\u5c31\u662fO(N)\uff0c\u8fd9\u91ccN\u8868\u793a\u622a\u53d6\u7684\u5b50\u5b57\u7b26\u4e32\u957f\u5ea6\u3002\u8be5\u547d\u4ee4\u5728\u622a\u53d6\u5b50\u5b57\u7b26\u4e32\u65f6\uff0c\u5c06\u4ee5\u95ed\u533a\u95f4\u7684\u65b9<\/p>\n<p>\u5f0f\u540c\u65f6\u5305\u542bstart(0\u8868\u793a\u7b2c\u4e00\u4e2a\u5b57\u7b26)\u548cend\u6240\u5728\u7684\u5b57\u7b26\uff0c\u5982\u679cend\u503c\u8d85\u8fc7Value\u7684\u5b57\u7b26\u957f\u5ea6\uff0c\u8be5\u547d\u4ee4\u5c06\u53ea\u662f\u622a\u53d6\u4ecestart\u5f00\u59cb\u4e4b\u540e\u6240\u6709\u7684\u5b57\u7b26\u6570\u636e\u3002<\/p>\n<\/td>\n<td>\u5b50\u5b57\u7b26\u4e32&nbsp;<\/td>\n<\/tr>\n<tr>\n<td><strong>SETBIT<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\n<p>\u8bbe\u7f6e\u5728\u6307\u5b9aOffset\u4e0aBIT\u7684\u503c\uff0c\u8be5\u503c\u53ea\u80fd\u4e3a1\u62160\uff0c\u5728\u8bbe\u5b9a\u540e\u8be5\u547d\u4ee4\u8fd4\u56de\u8be5Offset\u4e0a\u539f\u6709\u7684BIT\u503c\u3002\u5982\u679c\u6307\u5b9aKey\u4e0d\u5b58\u5728\uff0c\u8be5\u547d\u4ee4\u5c06\u521b\u5efa\u4e00\u4e2a\u65b0\u503c\uff0c\u5e76\u5728\u6307\u5b9a<\/p>\n<p>\u7684Offset\u4e0a\u8bbe\u5b9a\u53c2\u6570\u4e2d\u7684BIT\u503c\u3002\u5982\u679cOffset\u5927\u4e8eValue\u7684\u5b57\u7b26\u957f\u5ea6\uff0cRedis\u5c06\u62c9\u957fValue\u503c\u5e76\u5728\u6307\u5b9aOffset\u4e0a\u8bbe\u7f6e\u53c2\u6570\u4e2d\u7684BIT\u503c\uff0c\u4e2d\u95f4\u6dfb\u52a0\u7684BIT\u503c\u4e3a0\u3002\u6700\u540e\u9700\u8981<\/p>\n<p>\u8bf4\u660e\u7684\u662fOffset\u503c\u5fc5\u987b\u5927\u4e8e0\u3002&nbsp;<\/p>\n<\/td>\n<td>\u5728\u6307\u5b9aOffset\u4e0a\u7684BIT\u539f\u6709\u503c\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>GETBIT<\/strong><\/td>\n<td>O(1)<\/td>\n<td>\u8fd4\u56de\u5728\u6307\u5b9aOffset\u4e0aBIT\u7684\u503c\uff0c0\u62161\u3002\u5982\u679cOffset\u8d85\u8fc7string value\u7684\u957f\u5ea6\uff0c\u8be5\u547d\u4ee4\u5c06\u8fd4\u56de0\uff0c\u6240\u4ee5\u5bf9\u4e8e\u7a7a\u5b57\u7b26\u4e32\u59cb\u7ec8\u8fd4\u56de0\u3002<\/td>\n<td>\u5728\u6307\u5b9aOffset\u4e0a\u7684BIT\u503c\u3002&nbsp;<\/td>\n<\/tr>\n<tr>\n<td><strong>MGET<\/strong><\/td>\n<td>O(N)<\/td>\n<td>N\u8868\u793a\u83b7\u53d6Key\u7684\u6570\u91cf\u3002\u8fd4\u56de\u6240\u6709\u6307\u5b9aKeys\u7684Values\uff0c\u5982\u679c\u5176\u4e2d\u67d0\u4e2aKey\u4e0d\u5b58\u5728\uff0c\u6216\u8005\u5176\u503c\u4e0d\u4e3astring\u7c7b\u578b\uff0c\u8be5Key\u7684Value\u5c06\u8fd4\u56denil\u3002<\/td>\n<td>\u8fd4\u56de\u4e00\u7ec4\u6307\u5b9aKeys\u7684Values\u7684\u5217\u8868\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>MSET<\/strong><\/td>\n<td>O(N)<\/td>\n<td>N\u8868\u793a\u6307\u5b9aKey\u7684\u6570\u91cf\u3002\u8be5\u547d\u4ee4\u539f\u5b50\u6027\u7684\u5b8c\u6210\u53c2\u6570\u4e2d\u6240\u6709key\/value\u7684\u8bbe\u7f6e\u64cd\u4f5c\uff0c\u5176\u5177\u4f53\u884c\u4e3a\u53ef\u4ee5\u770b\u6210\u662f\u591a\u6b21\u8fed\u4ee3\u6267\u884cSET\u547d\u4ee4\u3002&nbsp;<\/td>\n<td>\u8be5\u547d\u4ee4\u4e0d\u4f1a\u5931\u8d25\uff0c\u59cb\u7ec8\u8fd4\u56deOK\u3002 &nbsp;<\/td>\n<\/tr>\n<tr>\n<td><strong>MSETNX<\/strong><\/td>\n<td>O(N)<\/td>\n<td>\n<p>N\u8868\u793a\u6307\u5b9aKey\u7684\u6570\u91cf\u3002\u8be5\u547d\u4ee4\u539f\u5b50\u6027\u7684\u5b8c\u6210\u53c2\u6570\u4e2d\u6240\u6709key\/value\u7684\u8bbe\u7f6e\u64cd\u4f5c\uff0c\u5176\u5177\u4f53\u884c\u4e3a\u53ef\u4ee5\u770b\u6210\u662f\u591a\u6b21\u8fed\u4ee3\u6267\u884cSETNX\u547d\u4ee4\u3002\u7136\u800c\u8fd9\u91cc\u9700\u8981\u660e\u786e\u8bf4\u660e\u7684\u662f\uff0c<\/p>\n<p>\u5982\u679c\u5728\u8fd9\u4e00\u6279Keys\u4e2d\u6709\u4efb\u610f\u4e00\u4e2aKey\u5df2\u7ecf\u5b58\u5728\u4e86\uff0c\u90a3\u4e48\u8be5\u64cd\u4f5c\u5c06\u5168\u90e8\u56de\u6eda\uff0c\u5373\u6240\u6709\u7684\u4fee\u6539\u90fd\u4e0d\u4f1a\u751f\u6548\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>String\uff08\u5b57\u7b26\u4e32\uff09<\/h2>\n<p>append key value \u5728\u539f\u6709\u7684value\u4e0a\u6dfb\u52a0\u503c\uff0c\u5982\u679ckey\u539f\u5148\u4e0d\u5b58\u5728\u5c31\u65b0\u5efa\u4e00\u4e2akey\u548cvalue\u4e0d\u662f\u8ffd\u52a0<\/p>\n<p>substr key start len \u622a\u53d6key\uff0c\u4ecestart\u5f00\u59cb\uff0c\u622a\u53d6len\u7684\u957f\u5ea6<\/p>\n<p>strlen key \u83b7\u53d6key\u7684\u957f\u5ea6<\/p>\n<p>incr key \u81ea\u589e1<\/p>\n<p>decr key \u81ea\u51cf1<\/p>\n<p>incrby key num \u589e\u52a0key \uff0c\u589e\u52a0num<\/p>\n<p>decrby key num \u51cf\u5c11key\uff0c\u51cf\u5c11num<\/p>\n<p>getrange key start end \u622a\u53d6\u5b57\u7b26key [start\uff0cend] \u5305\u5934\u4e5f\u5305\u5c3e<\/p>\n<p>setrange key offset value \u66ff\u6362offset\u4f4d\u7f6e\u7684\u6570\u636e\u6539\u6210value \uff08offset\u662fkey\u7684\u7d22\u5f15)<\/p>\n<p>setex key seconds value \u8bbe\u7f6ekey\u7684\u8fc7\u671f\u65f6\u95f4<\/p>\n<p>setnx key value \u4e0d\u5b58\u5728\u8bbe\u7f6ekey\u3001value \u5982\u679ckey\u5b58\u5728\u518d\u6b21\u6dfb\u52a0value\u4f1a\u5931\u8d25<\/p>\n<p>mset key1 value key2 value \u4e00\u6b21\u6027\u8bbe\u7f6e\u591a\u4e2akey\u3001value<\/p>\n<p>mget key1 key2 \u4e00\u6b21\u6027\u83b7\u53d6\u591a\u4e2akey\u7684value<\/p>\n<p>msetnx key1 value key2 value \u4e00\u6b21\u6027\u8bbe\u7f6e\u591a\u4e2akey\u3001value \u5982\u679c\u5176\u4e2d\u4e00\u4e2akey\u5b58\u5728\u5219\u5168\u90e8\u521b\u5efa\u5931\u8d25\uff08\u539f\u5b50\u6027\uff09<\/p>\n<p>getset key value \u5982\u679c\u4e0d\u5b58\u5728\u83b7\u53d6nil,\u7136\u540e\u8bbe\u7f6e\u503c\uff0c\u5982\u679c\u6307\u5b58\u5728\u83b7\u53d6\u4e4b\u524d\u7684\u503c\uff0c\u5728\u8bbe\u7f6e\u540e\u9762\u7684value\uff08\u66f4\u65b0\u7684\u64cd\u4f5c\uff09<\/p>\n<pre>###############################################\n127.0.0.1:6379&gt; set key1 v\nOK\n127.0.0.1:6379&gt; get key1\n\"v\"\n127.0.0.1:6379&gt; keys *\n1) \"key1\"\n127.0.0.1:6379&gt; exists key1\n(integer) 1\n127.0.0.1:6379&gt; append key1 v1\n(integer) 3\n127.0.0.1:6379&gt; get key1\n\"vv1\"\n127.0.0.1:6379&gt; substr key1 0 3\n\"vv1\"\n127.0.0.1:6379&gt; strlen key1\n(integer) 3\n127.0.0.1:6379&gt; append key1 \"hello1\"\n(integer) 9\n127.0.0.1:6379&gt; substr key1 1 2\n\"v1\"\n127.0.0.1:6379&gt; substr key1 1 1\n\"v\"\n127.0.0.1:6379&gt; append key2 \"lisi\"\n(integer) 4\n127.0.0.1:6379&gt; get key2\n\"lisi\"\n###############################################\n127.0.0.1:6379&gt; set views 0\nOK\n127.0.0.1:6379&gt; get views\n\"0\"\n127.0.0.1:6379&gt; incr views\n(integer) 1\n127.0.0.1:6379&gt; incr views\n(integer) 2\n127.0.0.1:6379&gt; get views\n\"2\"\n127.0.0.1:6379&gt; decr views\n(integer) 1\n127.0.0.1:6379&gt; decr views\n(integer) 0\n127.0.0.1:6379&gt; incrby views 10\n(integer) 10\n127.0.0.1:6379&gt; decrby views 5\n(integer) 5\n####################################\n127.0.0.1:6379&gt; set key1 \"hello,world\"\nOK\n127.0.0.1:6379&gt; GETRANGE key1 0 3\n\"hell\"\n127.0.0.1:6379&gt; GETRANGE key1 0 -1\n\"hello,world\"\n127.0.0.1:6379&gt; SETRANGE key2 3 2\n(integer) 7\n127.0.0.1:6379&gt; get key2\n\"abc2efg\"\n########################################\n127.0.0.1:6379&gt; setex key3 30 hello\nOK\n127.0.0.1:6379&gt; get key3\n\"hello\"\n127.0.0.1:6379&gt; ttl key3\n(integer) 24\n127.0.0.1:6379&gt; SETNX mykey redis\n(integer) 1\n127.0.0.1:6379&gt; keys *\n1) \"mykey\"\n2) \"key2\"\n3) \"key1\"\n127.0.0.1:6379&gt; SETNX mykey \"MongoDB\"\n(integer) 0\n127.0.0.1:6379&gt; get mykey\n\"redis\"\n####################################\n127.0.0.1:6379&gt; mset k1 v1 k2 v2\nOK\n127.0.0.1:6379&gt; mget k1 k2\n1) \"v1\"\n2) \"v2\"\n127.0.0.1:6379&gt; MSETNX k1 v1 k3 v3\n(integer) 0\n# \u5bf9\u8c61\n# \u8fd9\u91cc\u7684key\u662f\u4e00\u4e2a\u5de7\u5999\u7684\u8bbe\u8ba1 user:{id}:{filed} \n127.0.0.1:6379&gt; msetnx user:1:name \"zhangsan\" user:1:age 2\n(integer) 1\n127.0.0.1:6379&gt; mget user:1:name user:1:age\n1) \"zhangsan\"\n2) \"2\"\n127.0.0.1:6379&gt; set article:101:views 0\nOK\n127.0.0.1:6379&gt; incr article:101:views\n(integer) 1\n127.0.0.1:6379&gt; get article:101:views\n\"1\"\n###########################################################\n127.0.0.1:6379&gt; getset db redis\n(nil)\n127.0.0.1:6379&gt; get db\n\"redis\"\n127.0.0.1:6379&gt; getset db 10\n\"redis\"<\/pre>\n<blockquote>\n<p>String\u7c7b\u4f3c\u7684\u573a\u666f\uff1avalue\u9664\u4e86\u662f\u6211\u4eec\u7684\u5b57\u7b26\u4e32\u8fd8\u53ef\u4ee5\u662f\u6211\u4eec\u7684\u6570\u5b57\uff01<\/p>\n<\/blockquote>\n<ul>\n<li>\u8ba1\u6570\u5668<\/li>\n<li>\u7edf\u8ba1\u591a\u5355\u4f4d\u7684\u6570\u91cf uid:1923:follow 0<\/li>\n<li>\u7c89\u4e1d\u6570<\/li>\n<li>\u5bf9\u8c61\u7f13\u5b58\u5b58\u50a8<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u6587\u641e\u61c2Redis\u4e2dString&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201312","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201312","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201312"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201312\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201312"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201312"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}