6.4 定制化

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需求：保存一个 Person 对象到 redis

• 创建 Person 类

package com.zhong.redis.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;
import java.util.Date;

/**
 * @ClassName : Person
 * @Description :
 * @Author : zhx
 * @Date: 2024-06-14 16:11
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Person implements Serializable {
    // implements Serializable 实现序列化接口不然会报错
    private Long id;
    private String name;
    private Integer age;
    private Date birthday;
}

• 创建 RedisTestController 接口

package com.zhong.redis.controller;

import com.zhong.redis.entity.Person;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import java.util.Date;

/**
 * @ClassName : RedisTestController
 * @Description :
 * @Author : zhx
 * @Date: 2024-06-14 15:13
 */
@RestController
public class RedisTestController {

    @Autowired  // 如果给 redis 中保存数据会使用默认序列化机制，导致 redis 中保存对象不合适
    RedisTemplate redisTemplate;

    @GetMapping("/person/save")
    public String savePerson() {

        Person person = new Person(1L,"小钟",23,new Date());

        redisTemplate.opsForValue().set("person", person);

        return "ok";
    }

    @GetMapping("/person/get")
    public Person getPerson() {
        return (Person) redisTemplate.opsForValue().get("person");
    }
}

• 浏览器依次访问接口测试

http://localhost:8080/person/save

http://localhost:8080/person/get

• 查看 Redis 数据库发现乱码

• 开始定制

1、创建 RedisConfiguartion 配置类将 对象 序列化为 JSON

package com.zhong.redis.config;

import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnSingleCandidate;
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.GenericJackson2JsonRedisSerializer;

/**
 * @ClassName : RedisConfiguartion
 * @Description :
 * @Author : zhx
 * @Date: 2024-06-14 16:33
 */

@Configuration
public class RedisConfiguration {

    /**
     * template.setDefaultSerializer(new GenericJackson2JsonRedisSerializer()); 所有使用 JSON 存储
     * @param redisConnectionFactory 自动配置好了连接工程
     * @return
     */
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
        // 将对象转换为 JSON 字符串的序列化工具
        template.setDefaultSerializer(new GenericJackson2JsonRedisSerializer());
        return template;
    }

}

2、重新启动项目并按上述流程访问 接口