java 操作redis map_Java操作Redis存储HashMap对象类型数据
背景描述
关于JAVA去操作Redis时，如何存储一个对象的数据，这是大家非常关心的问题，虽然官方提供了存储String，List，Set等等类型，但并不满足我们现在实际应用。存储一个对象是非常常见的。经过网上查找资料以及参考其他网友的代码和实践操作后，整理出Redis如何存储一个Java的HashMap demo代码，如果有错误的地方大家可以留言指出。另外关于如果存储一个java对象可以参考上篇文章【Java操作Redis存储对象类型数据】https://blog.csdn.net/Chris_111X/article/details/85053544
参考资料
参考地址:
Bean代码
package com.obj.bean;
import java.io.Serializable;
public class Person implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
public String userName;
public String password;
public int age;
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 int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
测试代码
package com.java.client;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import com.obj.bean.Person;
import redis.clients.jedis.Jedis;
public class RedisHashMapKey {
public static void main(String[] args) throws IOException, ClassNotFoundException {
// TODO Auto-generated method stub
Jedis redis = new Jedis("10.190.130.143", 6379);
redis.auth("sa123456");
Person p1 = new Person();
p1.setUserName("user1");
p1.setPassword("password1");
p1.setAge(10);
Person p2 = new Person();
p2.setUserName("user2");
p2.setPassword("password2");
p2.setAge(12);
Person p3 = new Person();
p3.setUserName("user3");
p3.setPassword("password3");
p3.setAge(13);
HashMap map = new HashMap();
map.put("p1", p1);
map.put("p2", p2);
map.put("p3", p3);
//转成输出字节流
ByteArrayOutputStream bai = new ByteArrayOutputStream();
ObjectOutputStream obi = new ObjectOutputStream(bai);
obi.writeObject(map);
byte[] byt = bai.toByteArray();
// 将map存入redis中
redis.set("p".getBytes(), byt);
//获取map
byte[] personByte = redis.get("p".getBytes());
ObjectInputStream oii = null;
ByteArrayInputStream bis = null;
//转换成输入字节流
bis = new ByteArrayInputStream(personByte);
oii = new ObjectInputStream(bis);
Map result = (Map) oii.readObject();
for (Entry entry : result.entrySet()) {
System.out.println("key= " + entry.getKey());
Person obj = (Person) entry.getValue();
System.out.println("getUserName: " + obj.getUserName());
System.out.println("getPassword= " + obj.getPassword());
System.out.println("getAge= " + obj.getAge());
}
}
}
运行结果
查看Redis
