Springboot集成Redis(1)—进行增加,更新,查询,批量删除等操作

前言:最近工作中使用到了redis缓存,故分享一点自己总结的东西,这篇文章使用的是StringRedisTemplate进行学习,这里值的说的是,(1)StringRedisTemplate在进行批量删除操作时我们需对template进行序列化,(2)更新操作与添加操作一样,接下来上代码:
1.建立Spring boot项目,引入Redis依赖(pom.xml如下):

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    4.0.0

    com.test
    redis
    0.0.1-SNAPSHOT
    jar

    redis
    Demo project for Spring Boot

    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.0.RELEASE
         
    

    
        UTF-8
        UTF-8
        1.8
    

    
        
            org.springframework.boot
            spring-boot-starter-data-redis
        

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-test
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    


2.编写spring boot配置文件,这里我配置的内容简单,如需要其他的配置可以进官网去查

#Redis 
spring.redis.host=主机地址
spring.redis.password=admin
spring.redis.port=6379

server.port=8081

3.接下里我们开始写测试
(1)建立实体类:
User:

package com.test.redis.entity;

public class User {
    private Integer id;
    private String name;
    private String password;

    public User() {
        super();
    }

    public User(Integer id, String name, String password) {
        super();
        this.id = id;
        this.name = name;
        this.password = password;
    }

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", password=" + password + "]";
    }

}

(2)service层,主要对redis的各种操作方法进行定义
RedisService:

package com.test.redis.service;

import java.util.List;
import java.util.Map;

import javax.annotation.Resource;

import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
import org.springframework.stereotype.Service;

@Service
public class RedisService {
    @Resource
    private StringRedisTemplate template;

    /**
     * 存储数据或修改数据
     * 
     * @param modelMap
     * @param mapName
     */
    public void setKey(String mapName, Map modelMap) {
        HashOperations hps = template.opsForHash();
        hps.putAll(mapName, modelMap);
    }

    /**
     * 获取数据Map
     * 
     * @param mapName
     * @return
     */
    public Map getMapValue(String mapName) {
        HashOperations hps = this.template.opsForHash();
        return hps.entries(mapName);

    }

    /**
     * 获取数据value
     * 
     * @param mapName
     * @param hashKey
     * @return
     */
    public Object getValue(String mapName, String hashKey) {
        HashOperations hps = this.template.opsForHash();
        return hps.get(mapName, hashKey);

    }

    /**
     * 批量删除缓存数据
     * 
     * @param keys
     */
    public void deleteData(List keys) {
        // 执行批量删除操作时先序列化template
        template.setKeySerializer(new JdkSerializationRedisSerializer());
        template.delete(keys);
    }
}

(3)controller层代码,演示操作(添加与获取值):

package com.test.redis.web;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.test.redis.entity.User;
import com.test.redis.service.RedisService;

@Controller
public class UserController {

    private static final String mapName="mapName";
    @Autowired
    private RedisService redisService;

    @GetMapping( "/add.do")
    @ResponseBody
    public Map addUser(HttpServletRequest request){
        Map modelMap=new HashMap();
        User user=new User();
        user.setName("hehename");
        user.setPassword("hehePassword");
        //存放hash值
        modelMap.put("name", user.getName());
        modelMap.put("password", user.getPassword());
        redisService.setKey(mapName, modelMap);
        //获取map集合
        Map modelMap1= redisService.getMapValue(mapName);
        Object value= redisService.getValue(mapName, "name");
        System.out.println(" value : "+value);
        modelMap1.put("从缓存中根据key取到的value", value);
        return modelMap1;
    }

}

前台展示结果:
Spring boot集成Redis(1)—进行增加,更新,查询,批量删除等操作

(4)删除以及获取值操作:

@GetMapping( "/delete.do")
    @ResponseBody
    public Map deleteUser(HttpServletRequest request){
        //获取即将删除的key值,这里我们做的批量删除
        List keys=new ArrayList<>();
        keys.add("heheanme");
        //开始执行删除操作
        redisService.deleteData(keys);
        //获取map集合
        Map modelMap1= redisService.getMapValue(mapName);
        Object value= redisService.getValue(mapName, "name");
        System.out.println(" value : "+value);
        modelMap1.put("从缓存中根据key取到的value", value);
        return modelMap1;
    }

前台显示结果:
Spring boot集成Redis(1)—进行增加,更新,查询,批量删除等操作

由此可见,操作成功


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