前言：最近工作中使用到了redis緩存，故分享一點自己總結(jié)的東西，這篇文章使用的是StringRedisTemplate進(jìn)行學(xué)習(xí)，這里值的說的是，（1）StringRedisTemplate在進(jìn)行批量刪除操作時我們需對template進(jìn)行序列化，（2）更新操作與添加操作一樣，接下來上代碼：
1.建立Spring boot項目，引入Redis依賴（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.編寫spring boot配置文件，這里我配置的內(nèi)容簡單，如需要其他的配置可以進(jìn)官網(wǎng)去查

#Redis 
spring.redis.host=主機(jī)地址
spring.redis.password=admin
spring.redis.port=6379

server.port=8081

3.接下里我們開始寫測試
（1）建立實體類：
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層，主要對redis的各種操作方法進(jìn)行定義
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;

    /**
     * 存儲數(shù)據(jù)或修改數(shù)據(jù)
     * 
     * @param modelMap
     * @param mapName
     */
    public void setKey(String mapName, Map modelMap) {
        HashOperations hps = template.opsForHash();
        hps.putAll(mapName, modelMap);
    }

    /**
     * 獲取數(shù)據(jù)Map
     * 
     * @param mapName
     * @return
     */
    public Map getMapValue(String mapName) {
        HashOperations hps = this.template.opsForHash();
        return hps.entries(mapName);

    }

    /**
     * 獲取數(shù)據(jù)value
     * 
     * @param mapName
     * @param hashKey
     * @return
     */
    public Object getValue(String mapName, String hashKey) {
        HashOperations hps = this.template.opsForHash();
        return hps.get(mapName, hashKey);

    }

    /**
     * 批量刪除緩存數(shù)據(jù)
     * 
     * @param keys
     */
    public void deleteData(List keys) {
        // 執(zhí)行批量刪除操作時先序列化template
        template.setKeySerializer(new JdkSerializationRedisSerializer());
        template.delete(keys);
    }
}

（3）controller層代碼，演示操作（添加與獲取值）：

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);
        //獲取map集合
        Map modelMap1= redisService.getMapValue(mapName);
        Object value= redisService.getValue(mapName, "name");
        System.out.println(" value : "+value);
        modelMap1.put("從緩存中根據(jù)key取到的value", value);
        return modelMap1;
    }

}

前臺展示結(jié)果：

（4）刪除以及獲取值操作：

@GetMapping( "/delete.do")
    @ResponseBody
    public Map deleteUser(HttpServletRequest request){
        //獲取即將刪除的key值，這里我們做的批量刪除
        List keys=new ArrayList<>();
        keys.add("heheanme");
        //開始執(zhí)行刪除操作
        redisService.deleteData(keys);
        //獲取map集合
        Map modelMap1= redisService.getMapValue(mapName);
        Object value= redisService.getValue(mapName, "name");
        System.out.println(" value : "+value);
        modelMap1.put("從緩存中根據(jù)key取到的value", value);
        return modelMap1;
    }

前臺顯示結(jié)果：

由此可見，操作成功