前言：上一篇文章我們用的是StringredisTemplate，但是它存在一點(diǎn)問題，也迫使我重新寫了代碼，問題是：在我們往緩存中存入數(shù)字形式的String類型時(shí)，我們?cè)诶肧pring could將獲取到的數(shù)據(jù)發(fā)送到另一服務(wù)時(shí)，我們發(fā)現(xiàn)數(shù)據(jù)已經(jīng)被強(qiáng)轉(zhuǎn)為Integer類型了，因?yàn)槲覀兛赡軅鬏數(shù)臄?shù)據(jù)龐大，類型多樣，為了統(tǒng)一類型，以及開發(fā)方便，所以我將緩存改成RedisTemplate這種類型，進(jìn)行增刪改查的操作，文中沒有特別舉例更新操作，其更新操作與添加操作一樣，當(dāng)key一樣時(shí)進(jìn)行添加就會(huì)覆蓋原value值，完成更新。RedisTemplate需要我們自己去配置它并進(jìn)行實(shí)例化。接下來，舉例子，上代碼：
首先建立Spring boot項(xiàng)目添加Redis依賴

下載導(dǎo)入IDE,我們觀察pom.xml文件：

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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
            
        
    

1.配置application.properties

#redis
spring.redis.host=主機(jī)地址
spring.redis.password=admin
spring.redis.port=6379
spring.redis.timeout=10000
spring.redis.jedis.pool.max-idle=200 
spring.redis.jedis.pool.min-idle=300000    
spring.redis.jedis.pool.max-active=400
spring.redis.jedis.pool.max-wait=10000

2.我們寫配置配置類實(shí)例化RedisTemplate

package com.test.redis.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.data.redis.connection.RedisConnectionFactory;

@Configuration
public class RedisConfig {

    /**
     * 實(shí)例化 RedisTemplate 對(duì)象
     *
     * @return
     */
    @Bean
    public RedisTemplate functionDomainRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate redisTemplate = new RedisTemplate<>();
        initDomainRedisTemplate(redisTemplate, redisConnectionFactory);
        return redisTemplate;
    }

    /**
     * 設(shè)置數(shù)據(jù)存入 redis 的序列化方式,并開啟事務(wù)
     * 
     * @param redisTemplate
     * @param factory
     */
    private void initDomainRedisTemplate(RedisTemplate redisTemplate, RedisConnectionFactory factory) {
        // 如果不配置Serializer，那么存儲(chǔ)的時(shí)候缺省使用String，如果用User類型存儲(chǔ)，那么會(huì)提示錯(cuò)誤User can't cast to
        // String！
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
        // 開啟事務(wù)
        redisTemplate.setEnableTransactionSupport(true);
        redisTemplate.setConnectionFactory(factory);
    }

}

3.寫緩存操作的Service層，進(jìn)行增刪改查方法的定義：

package cn.com.dhcc.idatabus.admin.console.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.RedisTemplate;
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
import org.springframework.stereotype.Service;

@Service
public class RedisService {

    @Resource
    private RedisTemplate template;

    /**
     * 存儲(chǔ)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(shí)先序列化template
        template.setKeySerializer(new JdkSerializationRedisSerializer());
        template.delete(keys);
    }

}

4.本次例子的實(shí)體類

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 + "]";
    }

}

5.編寫Controller層，來實(shí)現(xiàn)緩存的操作

package com.test.redis.web;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
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( "/templateAdd.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;
    }

    @GetMapping( "/templateDelete.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;
    }

}

接下來，我們?cè)L問Controller路徑
（1）http://localhost:8081/templateAdd.do
結(jié)果：

（2）http://localhost:8081/templateDelete.do
結(jié)果：