Java操作Redis

Posted 2020-11-05 jugglee

使用连接池

 1 public class Test {
 2 
 3     /**
 4      * Redis地址
 5      */
 6     private static final String ADDR = "10.124.133.184";
 7 
 8     /**
 9      * Redis端口
10      */
11     private static final Integer PORT = 6379;
12 
13     /**
14      * Redis访问密码
15      */
16     private static final String AUTH = "icloud20180514160728";
17 
18     /**
19      * 可用连接实例的最大数目，默认值为8
20      * 如果赋值为-1，则表示不限制；如果pool已经分配了maxActive个jedis实例，则此时pool的状态为exhausted(耗尽)
21      */
22     private static final Integer MAX_ACTIVE = 1024;
23 
24     /**
25      * 控制一个pool最多有多少个状态为idle(空闲的)的jedis实例，默认值也是8。
26      */
27     private static final Integer MAX_IDLE = 200;
28 
29     /**
30      * 等待可用连接的最大时间，单位毫秒，默认值为-1，表示永不超时。如果超过等待时间，则直接抛出JedisConnectionException；
31      */
32     private static int MAX_WAIT = 10000;
33 
34     private static final Integer TIMEOUT = 10000;
35 
36     /**
37      * 在borrow一个jedis实例时，是否提前进行validate操作；如果为true，则得到的jedis实例均是可用的
38      */
39     private static final Boolean TEST_ON_BORROW = true;
40 
41     private static JedisPool jedisPool = null;
42 
43 
44     /**
45      * 初始化Redis连接池
46      */
47     static {
48         try {
49             JedisPoolConfig config = new JedisPoolConfig();
50             config.setMaxIdle(MAX_IDLE);
51             config.setTestOnBorrow(TEST_ON_BORROW);
52             jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT, AUTH);
53         } catch (Exception e) {
54             e.printStackTrace();
55         }
56     }
57 
58     /**
59      * 获取Jedis实例
60      * @return
61      */
62     private static synchronized Jedis getJedis() {
63         try {
64             if (jedisPool != null) {
65                 return jedisPool.getResource();
66             } else {
67                 return null;
68             }
69         } catch (Exception e) {
70             e.printStackTrace();
71             return null;
72         }
73     }
74     public static void main(String[] args) {
75 
76         Jedis jedis = null;
77         jedis = getJedis();
78         if(null != jedis){
79             List<String> configList = jedis.configGet("*");
80             Map<String, String> confMap = new HashMap<String, String>();
81             Integer step = 2;
82             for(int i = 0; i < configList.size(); i = i + step){
83                 String paramName = configList.get(i);
84                 String paramValue = configList.get(i + 1);
85                 confMap.put(paramName, paramValue);
86             }
87             jedis.close();
88         }else{
89             System.out.println("jedis is null");
90         }
91     }
92 }

不用连接池

    public static void main(String[] args) {

        Jedis jedis = null;
        jedis = new Jedis(ADDR, PORT);
        jedis.auth(AUTH);

        Map<String, String> confMap = new HashMap<String, String>();
        List<String> configList = jedis.configGet("*");
        Integer step = 2;
        for(int i = 0; i < configList.size(); i = i + step){
            String paramName = configList.get(i);
            String paramValue = configList.get(i + 1);
            confMap.put(paramName, paramValue);
        }
        for(Map.Entry entry : confMap.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }
        //        jedis.configSet("hash-max-ziplist-entries","256");
        System.out.println("hash-max-ziplist-entries: " + jedis.configGet("hash-max-ziplist-entries"));
        jedis.close();

    }