spring+springmvc+mybatis整合redis快取
阿新 • • 發佈：2021-01-01
spring springmvc mybatis整合redis快取
一、搭建基礎的mvc框架
1.1新建maven專案
- 注：本文使用idea最新版可以直接建立web專案
1.2新增專案相關依賴
- 為了方便起見，在pom檔案中統一配置各個依賴版本號
<maven.compiler.target>1.8</maven.compiler.target> <maven.compiler.source>1.8</maven.compiler.source> <junit.version>5.7.0</junit.version> <spring.version>5.2.0.RELEASE</spring.version> <mybatis.version>3.4.6</mybatis.version> <mysql.version>8.0.22</mysql.version> <druid.version>1.2.4</druid.version> <jedis.version>3.4.1</jedis.version> <fastjson.version>1.2.75</fastjson.version> <mybatis.spring.version>1.3.2</mybatis.spring.version> <spring.data.redis.version>2.4.2</spring.data.redis.version>
- 新增相關依賴
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis.spring.version}</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>${jedis.version}</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>${spring.data.redis.version}</version> </dependency>
- 完整pom檔案
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>codetiger.ssmredis</groupId> <artifactId>ssm-redis</artifactId> <version>1.0-SNAPSHOT</version> <name>ssm-redis</name> <packaging>war</packaging> <properties> <maven.compiler.target>1.8</maven.compiler.target> <maven.compiler.source>1.8</maven.compiler.source> <junit.version>5.7.0</junit.version> <spring.version>5.2.0.RELEASE</spring.version> <mybatis.version>3.4.6</mybatis.version> <mysql.version>8.0.22</mysql.version> <druid.version>1.2.4</druid.version> <jedis.version>3.4.1</jedis.version> <fastjson.version>1.2.75</fastjson.version> <mybatis.spring.version>1.3.2</mybatis.spring.version> <spring.data.redis.version>2.4.2</spring.data.redis.version> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis.spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>${jedis.version}</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>${spring.data.redis.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-api</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-engine</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>3.3.0</version> </plugin> </plugins> </build> </project>
1.3新增配置檔案
1.3.1 新增spring 基礎配置
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置包自動掃描-->
<context:component-scan base-package="codetiger.ssmredis.ssm_redis">
<!-- 排除檢視層-->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>
1.3.2 新增mybatis配置檔案
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 引入jdbc配置檔案-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 配置連線池-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<!-- 配置基本屬性-->
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- 其他屬性-->
<!-- 初始化大小-->
<property name="initialSize" value="5"/>
<!-- 最小連線池數量-->
<property name="minIdle" value="5"/>
<!-- 最大連線池數量-->
<property name="maxActive" value="20"/>
<!-- 獲取連線時最大等待時間，單位毫秒-->
<property name="maxWait" value="60000"/>
<!-- 配置間隔多久才進行一次檢測，檢測需要關閉的空閒連線，單位是毫秒-->
<property name="timeBetweenEvictionRunsMillis" value="60000"/>
<!-- 配置一個連線在池中最小生存的時間，單位是毫秒-->
<property name="minEvictableIdleTimeMillis" value="300000"/>
<!-- 測試連線-->
<property name="validationQuery" value="SELECT 1 from DUAL"/>
<!-- 申請連線的時候檢測，建議配置為true，不影響效能，並且保證安全性-->
<property name="testWhileIdle" value="true"/>
<!-- 獲取連線時執行檢測，建議關閉，影響效能-->
<property name="testOnBorrow" value="false"/>
<!-- 歸還連線時執行檢測，建議關閉，影響效能-->
<property name="testOnReturn" value="false"/>
<!-- 是否開啟PSCache，PSCache對支援遊標的資料庫效能提升巨大，oracle建議開啟，mysql下建議關閉-->
<property name="poolPreparedStatements" value="false"/>
<!-- 開啟poolPreparedStatements後生效-->
<property name="maxPoolPreparedStatementPerConnectionSize" value="20"/>
<!-- 配置擴充套件外掛，常用的外掛有=>stat:監控統計 slf4j:日誌 wall:防禦sql注入-->
<property name="filters" value="stat,wall,slf4j"/>
<property name="connectionProperties" value="druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000"/>
</bean>
<!-- 配置SqlSession的工廠-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 注入資料庫連線池 -->
<property name="dataSource" ref="dataSource" />
<!-- 配置MyBaties全域性配置檔案:mybatis-config.xml -->
<property name="configLocation" value="classpath:mybatis-config.xml" />
<!--配置Mybatis的對映xml檔案路徑-->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
</bean>
<!--指定Mybatis的mapper介面掃描包-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--指定剛才我們配置好的sqlSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!--指定mapper介面掃描包-->
<property name="basePackage" value="codetiger.ssmredis.ssm_redis.dao"/>
</bean>
<!--配置事務管理器，如果不配置這個，不啟動事務掃描的話，那麼發生了異常也不會觸發回滾-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--還得指定資料來源-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!--啟動事務的掃描-->
<tx:annotation-driven/>
</beans>
1.3.3 新增springmvc配置檔案
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:cache="http://www.springframework.org/schema/cache"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--配置檢視解析器，這樣控制器裡就直接返回檔名就好了-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--字首-->
<property name="prefix" value="/WEB-INF/views/"/>
<!--字尾-->
<property name="suffix" value=".jsp"/>
</bean>
<!--配置靜態資源過濾，不然靜態資源比如css是訪問不到的-->
<mvc:default-servlet-handler/>
<!--配置掃描的包-->
<context:component-scan base-package="nn.apartment" use-default-filters="false">
<!--只掃描controller,這邊MVC就只掃描controller，就不會IOC那邊衝突，否則事務會被覆蓋，IOC那邊就要排除這個controller-->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--啟用MVC的註解-->
<mvc:annotation-driven/>
</beans>
1.3.4新增mybatis控制檔案
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!--配置全域性設定-->
<settings>
<!--啟用日誌，並指定日誌實現方式-->
<setting name="logImpl" value="SLF4J"/>
<!--啟用主鍵生成策略-->
<setting name="useGeneratedKeys" value="true"/>
<!--配置啟用下劃線轉駝峰的對映-->
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!--啟用二級快取-->
<setting name="cacheEnabled" value="true"/>
</settings>
</configuration>
1.3.5修改web.xml 檔案
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!--1.配置Spring IOC容器的建立，如果不配置這個，Mybatis就在web應用裡無法使用-->
<context-param>
<param-name>contextConfigLocation</param-name>
<!--spring配置檔案路徑-->
<param-value>classpath:spring/spring-*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--2.配置SpringMVC的前端控制器-->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!--SpringMVC整合配置檔案路徑-->
<param-value>classpath:spring/springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--3.配置字元編碼過濾器-->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
1.3.6新增資料來源
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://db:3306/apartment?useUnicode=true&characterEncoding=utf-8
jdbc.username=
jdbc.password=
1.3.7 新增redis相關配置，使用Java檔案配置
RedisConfig.java
package codetiger.ssmredis.ssm_redis.utils;
import com.alibaba.fastjson.support.spring.FastJsonRedisSerializer;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import redis.clients.jedis.JedisPoolConfig;
import java.time.Duration;
/**
* @program: ssm-redis
* @description:
* @author: Mr.Nie
* @create: 2020-12-31 18:35
**/
@Configuration
public class RedisConfig {
String redishost = "program";
int port = 6379;
//配置jedispool
@Bean("JedisPoolConfig")
public JedisPoolConfig getJedisPoolConfig(){
JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
// 配置最大連線數
jedisPoolConfig.setMaxTotal(10);
// 配置最大空閒連線數
jedisPoolConfig.setMaxIdle(5);
// 配置最小空閒連線數
jedisPoolConfig.setMinIdle(0);
// 配置是否需要等待
jedisPoolConfig.setBlockWhenExhausted(true);
// 配置最大等待時間毫秒
jedisPoolConfig.setMaxWaitMillis(60000);
// 是否進行連線有效性檢測
jedisPoolConfig.setTestOnBorrow(true);
// 是否進行釋放有效性檢測
jedisPoolConfig.setTestOnReturn(true);
// 是否開啟JMX監控
jedisPoolConfig.setJmxEnabled(true);
return jedisPoolConfig;
}
//配置連線工廠
@Bean("JedisConnectionFactory")
public JedisConnectionFactory getJedisConnectionFactory(@Qualifier("JedisPoolConfig") JedisPoolConfig jedisPoolConfig){
try {
//單機版jedis
RedisStandaloneConfiguration redisStandaloneConfiguration =
new RedisStandaloneConfiguration();
//設定redis伺服器的host或者ip地址
redisStandaloneConfiguration.setHostName(redishost);
//設定預設使用的資料庫
// redisStandaloneConfiguration.setDatabase(0);
//設定密碼
// redisStandaloneConfiguration.setPassword(RedisPassword.of("123456"));
//設定redis的服務的埠號
redisStandaloneConfiguration.setPort(port);
//獲得預設的連線池構造器(怎麼設計的，為什麼不抽象出單獨類，供使用者使用呢)
JedisClientConfiguration.JedisPoolingClientConfigurationBuilder jpcb =
(JedisClientConfiguration.JedisPoolingClientConfigurationBuilder)JedisClientConfiguration.builder();
//指定jedisPoolConifig來修改預設的連線池構造器（真麻煩，濫用設計模式！）
jpcb.poolConfig(jedisPoolConfig);
//通過構造器來構造jedis客戶端配置
JedisClientConfiguration jedisClientConfiguration = jpcb.build();
//單機配置 + 客戶端配置 = jedis連線工廠
return new JedisConnectionFactory(redisStandaloneConfiguration, jedisClientConfiguration);
}
catch (Exception e){
return null;
}
}
//配置redis模板
@Bean
public RedisTemplate<String, String> redisTemplate(@Qualifier("JedisConnectionFactory") JedisConnectionFactory cf) {
RedisTemplate<String, String> redisTemplate = new RedisTemplate<String, String>();
redisTemplate.setConnectionFactory(cf);
return redisTemplate;
}
@Bean
public CacheManager cacheManager(JedisConnectionFactory factory) {
FastJsonRedisSerializer<Object> fastJsonUtil = new FastJsonRedisSerializer<>(Object.class);
// 生成兩套預設配置，通過 Config 物件即可對快取進行自定義配置
RedisCacheConfiguration cacheConfig = RedisCacheConfiguration.defaultCacheConfig()
// 設定過期時間 10 分鐘
.entryTtl(Duration.ofMinutes(10))
// 設定快取字首
.prefixKeysWith("luyu:")
// 禁止快取 null 值
.disableCachingNullValues()
.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(fastJsonUtil));
// 設定 key 序列化
// .serializeKeysWith()
// // 設定 value 序列化
// .serializeValuesWith();
// 返回 Redis 快取管理器
return RedisCacheManager.builder(factory)
.withCacheConfiguration("user", cacheConfig).build();
}
}
序列化工具：
FastJsonRedisSerializer.java
package codetiger.ssmredis.ssm_redis.utils;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import java.nio.charset.StandardCharsets;
/**
* @program: ssm-redis
* @description:
* @author: Mr.Nie
* @create: 2020-12-31 18:38
**/
public class FastJsonRedisSerializer<T> implements RedisSerializer<T> {
private final Class<T> clazz;
public FastJsonRedisSerializer(Class<T> clazz) {
super();
this.clazz = clazz;
}
@Override
public byte[] serialize(T t) throws SerializationException {
if (t == null) {
return new byte[0];
}
return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(StandardCharsets.UTF_8);
}
@Override
public T deserialize(byte[] bytes) throws SerializationException {
//新增fastjson白名單
ParserConfig.getGlobalInstance().addAccept("codetiger.ssmredis.ssm_redis.entily");
if (bytes == null || bytes.length <= 0) {
return null;
}
String str = new String(bytes, StandardCharsets.UTF_8);
return JSON.parseObject(str, clazz);
}
}
檔案結構如下：
二、編寫測試用例
2.1 使用者實體
package codetiger.ssmredis.ssm_redis.entily;
/**
* @program: ssm-redis
* @description:
* @author: Mr.Nie
* @create: 2020-12-31 18:43
**/
public class User {
int id;
String username;
String password;
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
2.2資料庫對映
UserDao.java
package codetiger.ssmredis.ssm_redis.dao;
import codetiger.ssmredis.ssm_redis.entily.User;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* @program: ssm-redis
* @description:
* @author: Mr.Nie
* @create: 2020-12-31 18:45
**/
@Repository
public interface UserDao {
List<User> selectAll();
}
2.3使用者服務
UserService.java
package codetiger.ssmredis.ssm_redis.service;
import codetiger.ssmredis.ssm_redis.dao.UserDao;
import codetiger.ssmredis.ssm_redis.entily.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @program: ssm-redis
* @description:
* @author: Mr.Nie
* @create: 2020-12-31 18:45
**/
@Service
public class UserService {
@Autowired
UserDao userDao;
public List<User> selectAll(){
return userDao.selectAll();
}
}
2.4檢視層
UserController.java
package codetiger.ssmredis.ssm_redis.controller;
import codetiger.ssmredis.ssm_redis.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
/**
* @program: ssm-redis
* @description:
* @author: Mr.Nie
* @create: 2020-12-31 18:48
**/
@Controller
public class UserController {
@Autowired
UserService userService;
@RequestMapping("/user/selectAll")
@ResponseBody
public String seltctAll(){
return userService.selectAll().toString();
}
}
2.5 mybatis對映檔案
UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="codetiger.ssmredis.ssm_redis.dao.UserDao">
<!--開啟快取-->
<cache/>
<!--從資料庫中查詢出所有的User物件-->
<select id="selectAll" resultType="codetiger.ssmredis.ssm_redis.entily.User">
select * from user
</select>
</mapper>
專案目錄結構：
2.6 執行測試是否成功
三、改造實現redis快取
3.1 改造service層
package codetiger.ssmredis.ssm_redis.service;
import codetiger.ssmredis.ssm_redis.dao.UserDao;
import codetiger.ssmredis.ssm_redis.entily.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @program: ssm-redis
* @description:
* @author: Mr.Nie
* @create: 2020-12-31 18:45
**/
@Service
public class UserService {
@Autowired
UserDao userDao;
@Cacheable(value = "user", key = "'test'")
public List<User> selectAll(){
return userDao.selectAll();
}
}
3.2 執行專案檢查redis是否有資料存入
