redis_demo

redis安装：Redis 安装 | 菜鸟教程 (runoob.com)

redis概念：Jedis入门 - 知乎 (zhihu.com)

jedis参考demo：Jedis入门教程_jedis教程-CSDN博客

模块目录结构：

 pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.example</groupId>
  <artifactId>redis_demo</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>redis_demo</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
      <version>4.2.3</version>
    </dependency>
    <!--Jackson包-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.9.0</version>
    </dependency>
      <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-databind</artifactId>
          <version>2.9.8</version>
          <scope>compile</scope>
      </dependency>
  </dependencies>
</project>

　　User.java:

package com.hmb;

import java.io.Serial;
import java.io.Serializable;

public class User implements Serializable {
    @Serial
    private static final long serialVersionUID = 2366153045258667761L;

    private int id;
    private String name;

    public User(int id, String name) {
        this.id = id;
        this.name = name;
    }

    public User() {
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }
}

　　jedis.properties

host=127.0.0.1
port=6379
maxTotal=50
maxIdle=10

　　JedisPoolUtils.java

package com.hmb;

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

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class JedisPoolUtils {
    private static JedisPool jedisPool;

    static {
        InputStream is = JedisPoolUtils.class.getClassLoader().getResourceAsStream("jedis.properties");
        Properties properties = new Properties();
        try {
            properties.load(is);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        JedisPoolConfig config = new JedisPoolConfig();
        config.setMaxTotal(Integer.parseInt(properties.getProperty("maxTotal")));
        config.setMaxIdle(Integer.parseInt(properties.getProperty("maxIdle")));
        jedisPool = new JedisPool(config, properties.getProperty("host"),
                Integer.parseInt(properties.getProperty("port")));
    }

    public static Jedis getJedis() {
        return jedisPool.getResource();
    }
}

　　Main.java

package com.hmb;

import com.fasterxml.jackson.databind.ObjectMapper;
import redis.clients.jedis.Jedis;

import java.io.IOException;

public class Main {
    public static void main(String[] args) throws IOException {
        Jedis jedis = JedisPoolUtils.getJedis();
        User user = new User(1, "zhangsan");
        System.out.println(user);
        ObjectMapper objectMapper = new ObjectMapper();
        String json = objectMapper.writeValueAsString(user);
        String key = "zhangsan";
        jedis.set(key, json);
        json = jedis.get(key);
        User user1 = objectMapper.readValue(json, User.class);
        System.out.println(user1);
    }
}

　　运行效果：