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问答 nutz能集成redis吗?
发布于 763天前 作者 wendal 1314 次浏览 复制 上一个帖子 下一个帖子
标签: redis

打算在项目里面用redis了

11 回复

基本配置可以参考: http://nutzbook.wendal.net/redis_basic/add_jars.html
至于详细用法嘛, 参考本站的源码, 因为这个站就用了redis哦

这是在兽总实现daocache的redis实现里面扒下来的,把redis的 get set方法封装了一个最简单的小工具

package com.nutztools.utils;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

public class RedisUtil {
private static JedisPool jedisPool;

static {

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.setMaxTotal(10);
    poolConfig.setMinIdle(5);
    poolConfig.setMinEvictableIdleTimeMillis(60000);
    poolConfig.setMaxWaitMillis(1 * 1000);
    poolConfig.setBlockWhenExhausted(true);
    poolConfig.setTestOnBorrow(false);
    jedisPool = new JedisPool(poolConfig, "127.0.0.1", 6379);
}





public static String get(String domain, String key) {
    String obj = null;
    try (Jedis jedis = jedisPool.getResource()) {
        obj = jedis.get(domain + ":" + key);
    }catch (Exception e){
        e.printStackTrace();
    } finally{
        //jedisPool.close();
    }
    if (obj != null) {
        return  obj ;
    }
    return null;
}

public static boolean set(String domain, String key, String obj) {

    if (obj == null) { 
        return false;
    }


    String _key =  domain + ":" + key;
    try (Jedis jedis = jedisPool.getResource()) {
        jedis.set(_key, obj);

    }catch (Exception e){
        e.printStackTrace();
    } finally{

        //jedisPool.close();
    }
    return true;
}

public static void main (String [] args){
for (int i=0;i<100;i++ ){
RedisUtil.set("ab", "张", "家江阴1");
System.out.println(RedisUtil.get("seoword", "张"));
RedisUtil.set("ab", "工", "家江阴2");
System.out.println(RedisUtil.get("seoword", "工"));
RedisUtil.set("ab", "奔", "家江阴3");
System.out.println(RedisUtil.get("seoword", "奔"));
RedisUtil.set("ab", "授与封地", "家江阴4");
System.out.println(RedisUtil.get("seoword", "授与封地"));
}
}

}

package com.nutztools.utils;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

public class RedisUtil {
private static JedisPool jedisPool;

static {

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.setMaxTotal(10);
    poolConfig.setMinIdle(5);
    poolConfig.setMinEvictableIdleTimeMillis(60000);
    poolConfig.setMaxWaitMillis(1 * 1000);
    poolConfig.setBlockWhenExhausted(true);
    poolConfig.setTestOnBorrow(false);
    jedisPool = new JedisPool(poolConfig, "127.0.0.1", 6379);
}





public static String get(String domain, String key) {
    String obj = null;
    try (Jedis jedis = jedisPool.getResource()) {
        obj = jedis.get(domain + ":" + key);
    }catch (Exception e){
        e.printStackTrace();
    } finally{
        //jedisPool.close();
    }
    if (obj != null) {
        return  obj ;
    }
    return null;
}

public static boolean set(String domain, String key, String obj) {

    if (obj == null) { 
        return false;
    }


    String _key =  domain + ":" + key;
    try (Jedis jedis = jedisPool.getResource()) {
        jedis.set(_key, obj);

    }catch (Exception e){
        e.printStackTrace();
    } finally{

        //jedisPool.close();
    }
    return true;
}

public static void main (String [] args){
for (int i=0;i<100;i++ ){
RedisUtil.set("ab", "张", "家江阴1");
System.out.println(RedisUtil.get("seoword", "张"));
RedisUtil.set("ab", "工", "家江阴2");
System.out.println(RedisUtil.get("seoword", "工"));
RedisUtil.set("ab", "奔", "家江阴3");
System.out.println(RedisUtil.get("seoword", "奔"));
RedisUtil.set("ab", "授与封地", "家江阴4");
System.out.println(RedisUtil.get("seoword", "授与封地"));
}
}

}

楼上用完了没返回连接池

@hongliuliao try(....) {} 已经自动关了, jdk7语法

@wendal , 但是这样会依赖jedis的版本,2.5.0之后jedis的版本Jedis.java才有如下代码会自动:

@Override
  public void close() {
    if (dataSource != null) {
      if (client.isBroken()) {
        this.dataSource.returnBrokenResource(this);
      } else {
        this.dataSource.returnResource(this);
      }
    } else {
      client.close();
    }
  }

@hongliuliao

try(Jedis jedis = jedisPool.getResource()) {

}
catch (Exception e){}

注意try后面的小括号,不是花括号, 这种语法已经包含了自动close

@wendal 我知道,但是如果是真的close是会有问题的,因为使用的是连接池,所以jedis在2.5.0之后的版本覆盖了close方法,并不执行真正的close,而是放回连接池

@hongliuliao 2.5.0是好久以前的版本了...

@wendal 话是这么说,不过代码能环保一些不更好么?

@hongliuliao try(....) 看着就很环保

来自炫酷的 NutzCN

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