Jedis连接Redis三种模式

Posted 2020-10-13

这里说的三种工作模式是指：

1、单机模式

2、分片模式

3、集群模式（since 3.0）

说明图详见以下：

使用单机模式连接：

1 private String addr="192.168.1.1";
2 private String port="6236";
3 private String key="key";
4 private Jedis jedis=new Jedis(addr,port);//Jedis获取到的Redis数据在jedis里,
jedis.set("a","b");//更改key为a的值
jedis.hmset(key,hash);
5 System.out.println(jedis.get(key));

使用分片模式连接：

GenericObjectPoolConfig config=new GenericObjectPoolConfig();

        config.setMaxIdle(32); 
        config.setMinIdle(12);
        config.setTestOnBorrow(true); 
        config.setTestOnReturn(rtrue);
        config.setTestWhileIdle(true);
        List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>(); 
        for (int i = 0; i < shareds.size(); i++) {
            shards.add(new JedisShardInfo("192.168.0.100", 6379, 200)); 
    }
        // 构造池 
        ShardedJedisPool shardedJedisPool= new ShardedJedisPool(config, shards);
        ShardedJedis jedis=shardedJedisPool.getResource();
        jedis.set("a","b");
        jedis.hmset(key, hash);

使用集群模式:

　　　　 String[] ADDRs = conf.getString("redisIP", "10.244.84.33").split(",");//conf是读取的配置

        String[] PORTs = conf.getString("redisPort", "6379").split(","); 
        for (int i = 0; i < length; i++) {
            HostAndPort hostAndPort = new HostAndPort(ADDRs[i], Integer.parseInt(PORTs[i]));
            haps.add(hostAndPort);
        }
        JedisCluster myJedisCluster = new JedisCluster(haps, TIMEOUT);  
　　　　　Map<String, String> gather = new HashMap<>(); //Redis中的数据是<key,value>形式，也可以是其他类型的数据
        gather =myJedisCluster.hgetAll(key) ; 

补充：使用JedisPool连接Redis：

public class RedisUtils {

    static {

        String configurationFileName = "xxx.properties";
        Configuration conf = Configuration.getConfiguration(configurationFileName);
        if (conf == null) {
            System.out.println("reading " + configurationFileName + " is failed.");
            System.exit(-1);
        }
        String[] ADDRs = conf.getString("redisIP", "10.100.56.33").split(",");
        String[] PORTs = conf.getString("redisPort", "6379").split(",");

        if (ADDRs.length == 0 || PORTs.length == 0) {
            System.out.println("definition redisIP is not found in " + configurationFileName);
            System.exit(-1);
        }
        JedisPoolConfig config = new JedisPoolConfig();
        config.setMaxIdle(MAX_IDLE);
        config.setTestOnBorrow(TEST_ON_BORROW);
        jedisPool = new JedisPool(config, ADDRs[0], PORT, TIMEOUT);
    }

    public synchronized static Jedis getJedis() {
        if (jedisPool != null) {
            //获取资源
            Jedis resource = jedisPool.getResource();
            return resource;
        } else {
            return null;
        }
    }

    public static void returnBrokenResource(Jedis jedis) {
        if (jedis != null) {
            //释放资源
            jedisPool.returnBrokenResource(jedis);

        }
    }

    public static void returnResource(Jedis jedis) {
        if (jedis != null) {
            //释放资源
            jedisPool.returnResource(jedis);
        }
    }
}

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