java操作redis(二):存取对象操作

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最新推荐文章于 2025-03-29 23:46:44 发布

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分类专栏： redis 文章标签： redis 对象存取 java

本文链接：https://blog.youkuaiyun.com/wx5040257/article/details/78463348

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本文介绍如何将Java对象序列化后存储到Redis，并提供完整的示例代码，包括用户实体类定义、Redis工具类及对象操作工具类的实现。

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前提，对象必须要序列化，即对象的实体类要实现序列化接口。

代码如下所示：

用户实体类:

=================UserEntity.java===============

package com.wx.entitys;

import java.io.Serializable;

public class UserEntity implements Serializable{
	private static final long serialVersionUID = 3660009371337848373L;
	private Integer userId;
	private String userName;
	private String passWord;
	private String email;
	
	public UserEntity() {
	}

	public UserEntity(Integer userId, String userName, 
			               String passWord, String email) {
		super();
		this.userId = userId;
		this.userName = userName;
		this.passWord = passWord;
		this.email = email;
	}

	public Integer getUserId() {
		return userId;
	}

	public void setUserId(Integer userId) {
		this.userId = userId;
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public String getPassWord() {
		return passWord;
	}

	public void setPassWord(String passWord) {
		this.passWord = passWord;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}
	
	
}

Redis工具类

=================RedisUtil.java===============

package com.wx.utils;

import redis.clients.jedis.Jedis;

public class RedisUtil {
	private static String ip="169.254.130.122";
	private static int port=6379;
	private static String passWord="test123";
	//把redis连接对象放到本地线程中
	private static ThreadLocal<Jedis> local=new ThreadLocal<Jedis>();
	
	private RedisUtil(){}
	
	//建立连接
	public static Jedis getConn(){
		//Redis对象
        Jedis jedis =local.get();
        try {
			if(jedis==null){
				//根据ip和端口号建立连接
				jedis=new Jedis(ip,port);
				//设置密码
				jedis.auth(passWord);
				local.set(jedis);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
        return jedis;
	}
	
	//关闭连接
	public static void closeConn(){
		//从本地线程中获取
		Jedis jedis =local.get();
		if(jedis!=null){
			jedis.close();
		}
		local.set(null);
	}
}

对象存取工具类

=================RedisObjUtil.java===============

package com.wx.utils;

import java.io.*;
import redis.clients.jedis.Jedis;

public class RedisObjUtil {
	// 存对象
	public static void setObject(Jedis jedis, String key, Object obj) throws Exception {
		ObjectOutputStream oos = null;  //对象输出流
		ByteArrayOutputStream bos = null;  //内存缓冲流
		bos = new ByteArrayOutputStream();
		oos = new ObjectOutputStream(bos);
		oos.writeObject(obj); 
		byte[] byt = bos.toByteArray();
		jedis.set(key.getBytes(), byt);
		bos.close();
		oos.close();
	}

	// 取对象
	public static Object getObject(Jedis jedis, String key) throws Exception {
		byte[] byt = jedis.get(key.getBytes());
		ObjectInputStream ois = null;  //对象输入流
		ByteArrayInputStream bis = null;   //内存缓冲流
		Object obj = null;
		bis = new ByteArrayInputStream(byt);
		ois = new ObjectInputStream(bis);
		obj = ois.readObject();
		bis.close();
		ois.close();
		return obj;
	}
}

测试类

=================TestObjectOpt.java===============

package com.wx.test;

import com.wx.entitys.UserEntity;
import com.wx.utils.RedisObjUtil;
import com.wx.utils.RedisUtil;

import redis.clients.jedis.Jedis;

public class TestObjectOpt {
	public static void main(String[] args) {
		Jedis jedis=RedisUtil.getConn();
		try {
			UserEntity user1=new UserEntity(110, "麻子", "123", "mazi@qq.com");
			RedisObjUtil.setObject(jedis, "user1", user1);
			UserEntity theUser=(UserEntity)RedisObjUtil.getObject(jedis, "user1");
			System.out.println(theUser.getUserName()+","+theUser.getEmail());
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			RedisUtil.closeConn();
		}
	}
}

执行完毕后，发现对象已经正确的存到了服务器上