java连接redis数据库简单操作（小白）

第一步：在pom.xml中加入redis依赖包

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

第二步：创建config配置类RedisConfig

package com.tedu.redisdemo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.io.Serializable;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * Spring的配置类，用于配置Redis
 * 在里面维护一个RedisTemple，用于让Spring IOC容器帮我们在需要的地方自动注入该类
 */
@Configuration
public class RedisConfig {
    @Bean
    public RedisTemplate<String, Serializable> initRedisTemplate(
            RedisConnectionFactory redisConnectionFactory){
        //初始化Redis的模板类
        RedisTemplate<String, Serializable> redisTemplate = new RedisTemplate<>();
        //为模板类设置链接工厂
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        //key序列化为字符串形式
        redisTemplate.setKeySerializer(RedisSerializer.string());
        /**
         * set("张三",person)
         * class Person{
         *     private String name;
         *     private int age;
         * }
         * set 张三 {"name": "张三","age": "22"}
         *
         */
        redisTemplate.setValueSerializer(RedisSerializer.json());
        //设置hash的序列化器
        redisTemplate.setHashKeySerializer(RedisSerializer.json());
        redisTemplate.setHashValueSerializer(RedisSerializer.json());

        return redisTemplate;
    }

}

第三步：在application.properties中加入连接

server.port=8080

//连接liux远程redis服务
spring.redis.host=192.168.175.128
spring.redis.port=6379
spring.redis.password=123456
spring.redis.database=0

//连接本地redis服务
spring.redis.host=localhost
spring.redis.port=6379

第四步：写测试类

//首先先注入
@Autowired
    private RedisTemplate<String, Serializable> redisTemplate;

//实现
@Test
    void contextLoads() {
        //创建一个用于操作SET GET命令的操作对象，进行普通的SET key value 和 GET key操作
        ValueOperations<String,Serializable> ops = redisTemplate.opsForValue();
        //SET hello world
        ops.set("hello","world");
        //GET hello
        System.out.println(ops.get("hello"));

        User user = new User(1,"张三","123456");
        ops.set("张三",user);

        User u = (User)ops.get("张三");
        System.out.println(u);

    }