Java中使用Jedis操作Redis
请使用jdk1.7版本
Jedis链接池
package com.stephen.redis;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.stephen.utility.DateTool;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
public class RedisUtil {
//Redis服务器IP
private static String ADDR = "127.0.0.1";
//Redis的端口号
private static int PORT = 6379;
//访问密码
private static String AUTH = "admin";
//可用连接实例的最大数目,默认值为8;
//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)。
private static int MAX_ACTIVE = 1024;
//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。
private static int MAX_IDLE = 200;
//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;
private static int MAX_WAIT = 10000;
//超时时间
private static int TIMEOUT = 10000;
//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;
private static boolean TEST_ON_BORROW = true;
//链接池名
private static JedisPool jedisPool = null;
/**
* 初始化Redis连接池
*/
static {
try {
System.out.println(DateTool.date2String()+" 初始化redis链接池:开始");
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(MAX_ACTIVE);//高版本的jedis中使用
// config.setMaxActive(MAX_ACTIVE);//低版本的jedis中使用
config.setMaxIdle(MAX_IDLE);
config.setMaxWaitMillis(MAX_WAIT);//高版本的jedis中使用
// config.setMaxWait(MAX_WAIT);//低版本的jedis中使用
config.setTestOnBorrow(TEST_ON_BORROW);
jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT, AUTH);
System.out.println(DateTool.date2String()+" 初始化redis链接池:成功");
} catch (Exception e) {
e.printStackTrace();
System.out.println(DateTool.date2String()+" 初始化redis链接池:失败,请停止web服务排除故障后重新运行,错误原因:"+e.getMessage());
}
}
/**
* 获取Jedis实例
* @return
*/
public synchronized static Jedis fetch() throws Exception{
return jedisPool.getResource();
}
/**
* 释放Jedis资源
* @param jedis
*/
public static void free(final Jedis jedis) {
if(jedisPool==null||jedis==null) return;
jedisPool.returnResource(jedis);
}
/**
* main
* @param args
*/
public static void main(String[] args) {
Jedis mJedis =null;
try {
mJedis = RedisUtil.fetch();
Map<String,String> map = new HashMap<String,String>();
map.put("name", "xinxin");
map.put("age", "20");
map.put("sex", "male");
mJedis.hmset("user", map);
List<String> data = mJedis.hmget("user", "name","age");
System.out.println(data);
} catch (Exception e) {
e.printStackTrace();
}finally{
RedisUtil.free(mJedis);
}
}
}
基本操作例子
package com.test;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.junit.Before;
import org.junit.Test;
import redis.clients.jedis.Jedis;
public class TestRedis {
private Jedis jedis;
@Before
public void setup() {
//连接redis服务器,192.168.0.100:6379
jedis = new Jedis("192.168.0.100", 6379);
//权限认证
jedis.auth("admin");
}
/**
* redis存储字符串
*/
@Test
public void testString() {
//-----添加数据----------
jedis.set("name","xinxin");//向key-->name中放入了value-->xinxin
System.out.println(jedis.get("name"));//执行结果:xinxin
jedis.append("name", " is my lover"); //拼接
System.out.println(jedis.get("name"));
jedis.del("name"); //删除某个键
System.out.println(jedis.get("name"));
//设置多个键值对
jedis.mset("name","liuling","age","23","qq","476777XXX");
jedis.incr("age"); //进行加1操作
System.out.println(jedis.get("name") + "-" + jedis.get("age") + "-" + jedis.get("qq"));
}
/**
* redis操作Map
*/
@Test
public void testMap() {
//redis的map操作
String key = "user";
mJedis.del(key);
//1.先创建map然后存储到redis
Map<String,String> map = new HashMap<String,String>();
map.put("user1", "1");
map.put("user2", "2");
map.put("user3", "3");
mJedis.hmset(key, map);
Log.out(mJedis.hgetAll(key).toString());
//输出:{user1=1, user2=2, user3=3}
mJedis.del(key);
//2.直接将key-value值存到redis中
mJedis.hset(key, "man01", "01");
mJedis.hset(key, "man02", "02");
mJedis.hset(key, "man03", "03");
Log.out(mJedis.hgetAll(key).toString());
//输出:{man03=03, man02=02, man01=01}
//判断map中的key是否存在
Log.out("map中存在man01吗?"+mJedis.hexists(key, "man01"));
Log.out("map中存在man02吗?"+mJedis.hexists(key, "man02"));
Log.out("map中存在man03吗?"+mJedis.hexists(key, "man03"));
Log.out("map中存在man04吗?"+mJedis.hexists(key, "man04"));
//输出:map中存在man01吗?true
//输出:map中存在man02吗?true
//输出:map中存在man03吗?true
//输出:map中存在man04吗?false
//-----添加数据----------
Map<String, String> map = new HashMap<String, String>();
map.put("name", "xinxin");
map.put("age", "22");
map.put("qq", "123456");
jedis.hmset("user",map);
//取出user中的name,执行结果:[minxr]-->注意结果是一个泛型的List
//第一个参数是存入redis中map对象的key,后面跟的是放入map中的对象的key,后面的key可以跟多个,是可变参数
List<String> rsmap = jedis.hmget("user", "name", "age", "qq");
System.out.println(rsmap);
//删除map中的某个键值
jedis.hdel("user","age");
System.out.println(jedis.hmget("user", "age")); //因为删除了,所以返回的是null
System.out.println(jedis.hlen("user")); //返回key为user的键中存放的值的个数2
System.out.println(jedis.exists("user"));//是否存在key为user的记录 返回true
System.out.println(jedis.hkeys("user"));//返回map对象中的所有key
System.out.println(jedis.hvals("user"));//返回map对象中的所有value
Iterator<String> iter=jedis.hkeys("user").iterator();
while (iter.hasNext()){
String key = iter.next();
System.out.println(key+":"+jedis.hmget("user",key));
}
}
/**
* jedis操作List
*/
@Test
public void testList(){
//开始前,先移除所有的内容
jedis.del("java framework");
System.out.println(jedis.lrange("java framework",0,-1));
//先向key java framework中存放三条数据
jedis.lpush("java framework","spring");
jedis.lpush("java framework","struts");
jedis.lpush("java framework","hibernate");
//再取出所有数据jedis.lrange是按范围取出,
// 第一个是key,第二个是起始位置,第三个是结束位置,jedis.llen获取长度 -1表示取得所有
System.out.println(jedis.lrange("java framework",0,-1));
jedis.del("java framework");
jedis.rpush("java framework","spring");
jedis.rpush("java framework","struts");
jedis.rpush("java framework","hibernate");
System.out.println(jedis.lrange("java framework",0,-1));
}
/**
* jedis操作Set
*/
@Test
public void testSet(){
//添加
jedis.sadd("user","liuling");
jedis.sadd("user","xinxin");
jedis.sadd("user","ling");
jedis.sadd("user","zhangxinxin");
jedis.sadd("user","who");
//移除noname
jedis.srem("user","who");
System.out.println(jedis.smembers("user"));//获取所有加入的value
System.out.println(jedis.sismember("user", "who"));//判断 who 是否是user集合的元素
System.out.println(jedis.srandmember("user"));
System.out.println(jedis.scard("user"));//返回集合的元素个数
}
@Test
public void test() throws InterruptedException {
//jedis 排序
//注意,此处的rpush和lpush是List的操作。是一个双向链表(但从表现来看的)
jedis.del("a");//先清除数据,再加入数据进行测试
jedis.rpush("a", "1");
jedis.lpush("a","6");
jedis.lpush("a","3");
jedis.lpush("a","9");
System.out.println(jedis.lrange("a",0,-1));// [9, 3, 6, 1]
System.out.println(jedis.sort("a")); //[1, 3, 6, 9] //输入排序后结果
System.out.println(jedis.lrange("a",0,-1));
}
@Test
public void testRedisPool() {
RedisUtil.getJedis().set("newname", "中文测试");
System.out.println(RedisUtil.getJedis().get("newname"));
}
}
标签:map,Java,Redis,Jedis,user,key,println,jedis,out From: https://blog.51cto.com/u_16160131/6473913