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
(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
前台展示结果:
(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:
由此可见,操作成功