Redis Hget\u7528\u6cd5\u6df1\u5ea6\u63a2\u7d22<\/p>\n<\/p>\n
Redis\u662f\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684key-value\u5b58\u50a8\u7cfb\u7edf\uff0c\u5b83\u652f\u6301\u4e30\u5bcc\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5176\u4e2dHash\u662f\u4e00\u79cd\u975e\u5e38\u5b9e\u7528\u7684\u6570\u636e\u7ed3\u6784\u3002Redis Hash \u5b58\u50a8\u7684\u662f\u952e\u503c\u5bf9\uff0c\u4f46\u76f8\u5bf9\u4e8e\u7b80\u5355\u7684\u5b57\u7b26\u4e32\u503c\uff0cHash\u80fd\u591f\u5b58\u50a8\u591a\u4e2a\u952e\u503c\u5bf9\u3002 \u5728Redis\u4e2d\u4f7f\u7528Hash\uff0c\u53ef\u4ee5\u4f7f\u7528Hset\u65b9\u6cd5\u5c06\u65b0\u7684\u503c\u6dfb\u52a0\u5230Hash\u4e2d\uff0c\u4f7f\u7528Hget\u65b9\u6cd5\u83b7\u53d6Hash\u4e2d\u7684\u503c\u3002\u672c\u6587\u7740\u91cd\u4ecb\u7ecdRedis Hget\u7684\u7528\u6cd5\u3002<\/p>\n<\/p>\n
\u4e00\u3001Redis Hget\u4ecb\u7ecd<\/p>\n<\/p>\n
Redis Hget\u547d\u4ee4\u7528\u4e8e\u83b7\u53d6\u54c8\u5e0c\u8868\u4e2d\u6307\u5b9a\u5b57\u6bb5\u7684\u503c\u3002Hget\u65b9\u6cd5\u9700\u8981\u6307\u5b9a\u54c8\u5e0c\u8868\u540d\u548c\u5b57\u6bb5\u540d\uff0c\u5982\u679c\u6307\u5b9a\u7684\u5b57\u6bb5\u4e0d\u5b58\u5728\uff0c\u90a3\u4e48\u8fd4\u56de\u7684\u7ed3\u679c\u4e3anil\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n
HGET key field
<\/pre>\n<\/p>\n\u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n<\/p>\n
\u2013 key\uff1a\u54c8\u5e0c\u8868\u540d\uff1b<\/p>\n
\u2013 field\uff1a\u5b57\u6bb5\u540d\uff1b<\/p>\n<\/p>\n
\u5728Redis\u4e2d\uff0cHget\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u53ef\u4ee5\u662f\u5b57\u7b26\u4e32\u3001\u6574\u6570\u6216\u6d6e\u70b9\u6570\uff0c\u56e0\u6b64\u5728\u4f7f\u7528Hget\u65b9\u6cd5\u65f6\u9700\u8981\u6ce8\u610f\u6570\u636e\u7c7b\u578b\u7684\u8f6c\u6362\u3002<\/p>\n<\/p>\n
\u4e8c\u3001Redis Hget\u4f7f\u7528\u793a\u4f8b<\/p>\n<\/p>\n
\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a\u201cuser\u201d\u7684\u54c8\u5e0c\u8868\uff0c\u5e76\u5728\u5176\u4e2d\u6dfb\u52a0\u5b57\u6bb5\u201cname\u201d\u548c\u201cage\u201d\uff1a<\/p>\n<\/p>\n
127.0.0.1:6379> HSET user name Alice
(integer) 1
127.0.0.1:6379> HSET user age 20
(integer) 1
<\/pre>\n<\/p>\n\u4f7f\u7528Hget\u65b9\u6cd5\u83b7\u53d6\u54c8\u5e0c\u8868\u4e2d\u7684\u503c\uff1a<\/p>\n<\/p>\n
127.0.0.1:6379> HGET user name
\"Alice\"
127.0.0.1:6379> HGET user age
\"20\"
<\/pre>\n<\/p>\n\u5982\u679c\u83b7\u53d6\u7684\u5b57\u6bb5\u4e0d\u5b58\u5728\uff0c\u5219\u8fd4\u56denil\uff1a<\/p>\n<\/p>\n
127.0.0.1:6379> HGET user gender
(nil)
<\/pre>\n<\/p>\n\u4e09\u3001Redis Hget\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f7f\u7528<\/p>\n<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cRedis Hget\u7528\u6cd5\u975e\u5e38\u7075\u6d3b\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06\u54c8\u5e0c\u8868\u4f5c\u4e3a\u7f13\u5b58\uff0c\u5b58\u50a8\u6570\u636e\u91cf\u8f83\u5927\u4f46\u8bfb\u53d6\u9891\u7387\u8f83\u4f4e\u7684\u6570\u636e\u3002\u6b64\u65f6\uff0c\u4f7f\u7528Hget\u65b9\u6cd5\u53ef\u4ee5\u5feb\u901f\u83b7\u53d6\u6307\u5b9a\u5b57\u6bb5\u7684\u503c\uff0c\u907f\u514d\u4e86\u591a\u6b21\u67e5\u8be2\u6570\u636e\u5e93\u7684\u5f00\u9500\u3002<\/p>\n<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u4f7f\u7528Redis Hget\u65b9\u6cd5\u5b9e\u73b0\u7f13\u5b58\u529f\u80fd\uff1a<\/p>\n<\/p>\n
const Redis = require('redis');
const client = Redis.createClient();
function getArticle(id) {
const key = `article:${id}`;
\/\/ \u5148\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u6587\u7ae0\u6570\u636e
client.hgetall(key, function(err, val) {
if(err) {
console.log('Redis error:', err);
}
if(val) {
console.log('\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u6587\u7ae0\u6570\u636e', val);
return val;
} else {
\/\/ \u5982\u679c\u7f13\u5b58\u4e2d\u4e0d\u5b58\u5728\uff0c\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u6587\u7ae0\u6570\u636e
const article = db.getArticle(id);
\/\/ \u5c06\u6570\u636e\u5b58\u5165\u7f13\u5b58
client.HSET(key, article, Redis.print);
console.log('\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u6587\u7ae0\u6570\u636e', article);
return article;
}
})
}
<\/pre>\n<\/p>\n\u5728\u4ee5\u4e0a\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528Hget\u65b9\u6cd5\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u4e86\u6587\u7ae0\u6570\u636e\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u5219\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\uff0c\u5e76\u5c06\u83b7\u53d6\u5230\u7684\u6570\u636e\u5b58\u5165\u7f13\u5b58\uff0c\u4e0b\u6b21\u67e5\u8be2\u65f6\u53ea\u9700\u8981\u4ece\u7f13\u5b58\u4e2d\u53d6\u51fa\u6570\u636e\u5373\u53ef\uff0c\u65e2\u63d0\u9ad8\u4e86\u67e5\u8be2\u901f\u5ea6\uff0c\u4e5f\u907f\u514d\u4e86\u6570\u636e\u5e93\u538b\u529b\u8fc7\u5927\u3002<\/p>\n<\/p>\n
\u56db\u3001\u603b\u7ed3<\/p>\n<\/p>\n
Redis Hget\u7528\u6cd5\u975e\u5e38\u7075\u6d3b\uff0c\u53ef\u4ee5\u5c06\u54c8\u5e0c\u8868\u4f5c\u4e3a\u7f13\u5b58\uff0c\u5b58\u50a8\u6570\u636e\u91cf\u8f83\u5927\u7684\u6570\u636e\uff0c\u4f7f\u7528Hget\u65b9\u6cd5\u53ef\u4ee5\u5feb\u901f\u83b7\u53d6\u6307\u5b9a\u5b57\u6bb5\u7684\u503c\uff0c\u907f\u514d\u591a\u6b21\u67e5\u8be2\u6570\u636e\u5e93\u7684\u5f00\u9500\u3002\u5728\u4f7f\u7528Hget\u65b9\u6cd5\u65f6\u9700\u8981\u6ce8\u610f\u6570\u636e\u7c7b\u578b\u7684\u8f6c\u6362\uff0c\u4ee5\u514d\u51fa\u73b0\u6570\u636e\u7c7b\u578b\u9519\u8bef\u3002<\/p>\n