Java 操作 Redis 高级

/Users/sherry/WorkPath/Git/Web/redisDemo/src/main/java/org/zln/utils/JedisUtils.java

package org.zln.utils;

import org.apache.commons.lang3.StringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

/**
 * Created by sherry on 16/9/13.
 */
public class JedisUtils {

    private static Logger logger = LogManager.getLogger();
    private static JedisPool pool = null;

    private static final String URL = "127.0.0.1";
    private static final int PORT = 6379;

    private static Jedis jedis = null;
    static {
        pool = new JedisPool(new JedisPoolConfig(), URL,PORT);

    }

    public static Jedis getRedisCon(String password){
        jedis = pool.getResource();
        if (StringUtils.isNotEmpty(password)){
            logger.info("以密码:"+password+" 登陆 redis");
            jedis.auth(password);
        }
        logger.info(jedis.ping());
        return jedis;
    }

    public static void closeRedisCon(Jedis jedis){
        if (jedis!=null){
            jedis.close();
        }
    }

    public static void closeApp(){
        //关闭应用程序的时候执行
        pool.destroy();
    }

}

/Users/sherry/WorkPath/Git/Web/redisDemo/src/main/java/org/zln/main/JedisMain.java

package org.zln.main;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.zln.utils.JedisUtils;
import redis.clients.jedis.Jedis;

import java.io.*;
import java.util.*;

/**
 * Created by sherry on 16/9/13.
 */
public class JedisMain {

    private static Logger logger = LogManager.getLogger();

    public static void main(String[] args) {
        Jedis jedis = JedisUtils.getRedisCon("");
//        stringTest(jedis);
//
//        listTest(jedis);
//
//        mapTest(jedis);
//
//        objTest(jedis);

        objListTest(jedis);
//        将这个Jedis实例归还给JedisPool。
        JedisUtils.closeRedisCon(jedis);

    }

    /**
     * 对象列表
     * @param jedis
     */
    private static void objListTest(Jedis jedis) {
        Person person1 = new Person("name1",1);
        Person person2 = new Person("name2",2);
        Person person3 = new Person("name3",3);
        Person person4 = new Person("name4",4);

        List<Person> persons = new ArrayList<>();
        persons.add(person1);
        persons.add(person2);
        persons.add(person3);
        persons.add(person4);

        try {
            for (Person person:persons){
                ByteArrayOutputStream bos =  new ByteArrayOutputStream();
                ObjectOutputStream oos =  new ObjectOutputStream(bos);
                oos.writeObject(person);
                byte [] byteArray = bos.toByteArray();
                oos.close();
                bos.close();

                logger.info("写入对象:"+person);
                jedis.lpush("persons".getBytes(),byteArray);
            }

            List<byte[]> personsBytes = jedis.lrange("persons".getBytes(),0,10);
            for (byte[] bs:personsBytes){
                ByteArrayInputStream bis =  new ByteArrayInputStream(bs);

                ObjectInputStream inputStream =  new ObjectInputStream(bis);

                Person readObject = (Person) inputStream.readObject();

                logger.info( " 读取对象 \t" + readObject.toString());

                inputStream.close();

                bis.close();
            }

        } catch (IOException|ClassNotFoundException e) {
            e.printStackTrace();
        }

        jedis.del("persons".getBytes());

    }

    /**
     * 存储对象
     * @param jedis
     */
    private static void objTest(Jedis jedis) {

        Person person = new Person();
        person.setAge(27);
        person.setName("卡卡卡");

        ByteArrayOutputStream bos =  new ByteArrayOutputStream();

        try {
            ObjectOutputStream oos =  new ObjectOutputStream(bos);
            oos.writeObject(person);

            byte [] byteArray = bos.toByteArray();
            oos.close();
            bos.close();

            String setObjectRet = jedis.set(person.getName().getBytes(), byteArray);

            logger.info( " set object return \t" + setObjectRet);

            byte [] bs = jedis.get( person.getName().getBytes());

            ByteArrayInputStream bis =  new ByteArrayInputStream(bs);

            ObjectInputStream inputStream =  new ObjectInputStream(bis);

            Person readObject = (Person) inputStream.readObject();

            logger.info( " read object \t" + readObject.toString());

            inputStream.close();

            bis.close();

        } catch (IOException|ClassNotFoundException e) {
            e.printStackTrace();
        }

        jedis.del(person.getName());
    }

    /**
     * 存储 Map
     * @param jedis
     */
    private static void mapTest(Jedis jedis) {
        Map<String,String> user =  new HashMap<String,String>();
        user.put( "name" ,  "cd" );
        user.put( "password" ,  "123456" );

        jedis.hmset("user",user);
        // mapkey 个数
        System.out.println(String.format ( "len:%d" , jedis.hlen( "user" )));
//map中的所有键值
        System.out.println(String.format ( "keys: %s" , jedis.hkeys( "user" ) ));
//map中的所有value
        System.out.println(String.format ( "values: %s" , jedis.hvals( "user" ) ));
//取出map中的name字段值
        List<String> rsmap = jedis.hmget( "user" ,  "name" , "password" );
        System.out.println(rsmap);
//删除map中的某一个键值 password
        jedis.hdel( "user" ,  "password" );
        System.out.println(jedis.hmget( "user" ,  "name" ,  "password" ));

        jedis.del("user");
    }

    /**
     * 存储列表
     * @param jedis
     */
    private static void listTest(Jedis jedis) {
        jedis.lpush("tutorial-list", "Redis");
        jedis.lpush("tutorial-list", "Mongodb");
        jedis.lpush("tutorial-list", "Mysql");
        // 获取存储的数据并输出
        List<String> list = jedis.lrange("tutorial-list", 0 ,5);
        for(int i=0; i<list.size(); i++) {
            System.out.println("Stored string in redis:: "+list.get(i));
        }
        jedis.del("tutorial-list");
    }

    /**
     * 存储字符串
     * @param jedis
     */
    private static void stringTest(Jedis jedis) {
        //一次次添加
        jedis.set("string1","一号字符串");
        jedis.set("string2","二号字符串");
        jedis.set("string3","三号字符串");
        jedis.set("string4","四号字符串");

        logger.info("获取string1:"+jedis.get("string1"));
        //在已有 key 上,对 value 进行新增
        jedis.append("string1","添加新字符串");
        logger.info("获取string1:"+jedis.get("string1"));

        //一次性添加多个键值对
        jedis.mset("s1","v1","s2","v2","s3","v3");
        logger.info("获取s1:"+jedis.get("s1"));

        for (Iterator<String> iterator = jedis.keys("*").iterator();iterator.hasNext();){
            String key = iterator.next();
            logger.info(key+":"+jedis.get(key));
            jedis.del(key);
        }

    }
}