SSM整合redis
redis是一种非关系型数据库，与mongoDB不同的是redis是内存数据库，所以访问速度很快。常用作缓存和发布-订阅式的消息队列。
这里用的是ssm框架+maven构建的项目。开发工具是idea
首先是需要引入的pom.xml文件：
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<!-- mybatis版本号 -->
<mybatis.version>3.2.4</mybatis.version>
<!-- log4j日志文件管理包版本 -->
<slf4j.version>1.6.6</slf4j.version>
<log4j.version>1.2.12</log4j.version>
<spring.version>4.2.5.RELEASE</spring.version>
</properties>
<dependencies>
<!-- 引入redis -->
<!-- redis cache related.....start -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>1.6.0.RELEASE</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.4.2</version>
</dependency>
<!-- spring核心包 -->
<!-- springframe start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- springframe end -->
<!-- mybatis核心包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!-- mybatis/spring包 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<!-- commons -->
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.5.6</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.8.3</version>
</dependency>
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>jsr250-api</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>net.sf.ezmorph</groupId>
<artifactId>ezmorph</artifactId>
<version>1.0.6</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- 日志文件管理包 -->
<!-- log start -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-1.2-api</artifactId>
<version>2.8.2</version>
</dependency>
<!-- log end -->
<!--log4j -->
<!--mysql数据库-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>
<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2.1-b03</version>
<scope>provided</scope>
</dependency>
<!-- servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<!-- junit测试包 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!--jackJson-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.geronimo.bundles</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.8_2</version>
</dependency>
<dependency>
<groupId>aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.5.4</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
我的项目结构如下:
然后引入各个配置文件:
1,数据库:
2.redis.properties
# Redis settings
redis.host=127.0.0.1
redis.port=6379
#redis.pass=password
redis.dbIndex=0
redis.expiration=3000
redis.maxIdle=300
redis.maxActive=600
redis.maxWait=1000
redis.testOnBorrow=true
3,spring的配置文件appcalitionContext.xml
<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
<mvc:annotation-driven/>
<context:component-scan base-package="com.springredis"/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/user?useSSL=true"/>
<property name="username" value="root"/>
<property name="password" value="1234"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 数据源 -->
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:sqlmap/*Mapper.xml"/>
<property name="typeAliasesPackage" value="com.springredis.entity"/>
</bean>
<!-- 在spring容器中配置mapper的扫描器产生的动态代理对象在spring的容器中自动注册，bean的id就是mapper类名（首字母小写）-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 指定扫描包的路径，就是mapper接口的路径，多个包中间以 半角逗号隔开 -->
<property name="basePackage" value="com.springredis.dao"/>
<!-- 配置sqlSessionFactoryBeanName -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEb-INF/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
4,编写spring-redis.xml
<?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: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/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:properties/redis.properties</value>
</list>
</property>
</bean>
<!--配置redis的参数-->
<bean class="redis.clients.jedis.JedisPoolConfig" id="poolConfig">
<property name="maxIdle" value="${redis.maxIdle}"/>
<property name="maxTotal" value="${redis.maxActive}"/>
<property name="maxWaitMillis" value="${redis.maxWait}"/>
<property name="testOnBorrow" value="${redis.testOnBorrow}"/>
</bean>
<!--配置redis的连接参数 如需要密码,请配置,database是redis的指定哪个库-->
<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
<property name="hostName" value="${redis.host}"/>
<property name="port" value="${redis.port}"/>
<!--<property name="password" value="${redis.password}"/>-->
<property name="database" value="${redis.dbIndex}"/>
<property name="poolConfig" ref="poolConfig"/>
</bean>
<!--redis操作模版,使用该对象可以操作redis -->
<bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory"/>
<property name="keySerializer">
<bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
</property>
<property name="valueSerializer">
<bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
</property>
<!--开启事务-->
<property name="enableTransactionSupport" value="true"/>
</bean>
<!-- 配置redis缓存管理器 -->
<bean id="redisCacheManager" class="org.springframework.data.redis.cache.RedisCacheManager">
<constructor-arg name="redisOperations" ref="redisTemplate"/>
<property name="defaultExpiration" value="${redis.expiration}"/>
</bean>
<!-- 配置RedisCacheConfig -->
<bean id="redisCacheConfig" class="com.springredis.config.redis.RedisCacheConfig">
<constructor-arg ref="jedisConnectionFactory"/>
<constructor-arg ref="redisTemplate"/>
<constructor-arg ref="redisCacheManager"/>
</bean>
<bean id="keyGenerator" class="com.springredis.config.redis.KeyGenerator"/>
<cache:annotation-driven cache-manager="redisCacheManager" key-generator="keyGenerator"/>
</beans>
5,在config的redis文件下新建RedisCacheConfig类
package com.springredis.config.redis; import org.springframework.cache.annotation.CachingConfigurerSupport; import org.springframework.cache.interceptor.KeyGenerator; import org.springframework.context.annotation.Bean; import org.springframework.data.redis.cache.RedisCacheManager; import org.springframework.data.redis.connection.jedis.JedisConnectionFactory; import org.springframework.data.redis.core.RedisTemplate; import java.lang.reflect.Method; /** * 文件描述: * 创建用户:emotion * 创建时间:2018/6/22 */
public class RedisCacheConfig extends CachingConfigurerSupport { private volatile JedisConnectionFactory jedisConnectionFactory; private volatile RedisTemplate<String, String> redisTemplate; private volatile RedisCacheManager redisCacheManager; public RedisCacheConfig() { super(); } /** * 带参数的构造方法 初始化所有的成员变量 * * @param jedisConnectionFactory * @param redisTemplate * @param redisCacheManager */
public RedisCacheConfig(JedisConnectionFactory jedisConnectionFactory, RedisTemplate<String, String> redisTemplate, RedisCacheManager redisCacheManager) { this.jedisConnectionFactory = jedisConnectionFactory; this.redisTemplate = redisTemplate; this.redisCacheManager = redisCacheManager; } public JedisConnectionFactory getJedisConnecionFactory() { return jedisConnectionFactory; } public RedisTemplate<String, String> getRedisTemplate() { return redisTemplate; } public RedisCacheManager getRedisCacheManager() { return redisCacheManager; } }
6,在redis下新建KeyGenerator类
package com.springredis.config.redis; import java.lang.reflect.Method; /** * 文件描述: * 创建用户:emotion * 创建时间:2018/6/22 */
public class KeyGenerator implements org.springframework.cache.interceptor.KeyGenerator { @Override public Object generate(Object o, Method method, Object... params) { //规定 本类名+方法名+参数名 为key
StringBuilder sb = new StringBuilder(); sb.append(o.getClass().getName()); sb.append("-"); sb.append(method.getName()); sb.append("-"); for (Object param : params) { sb.append(param.toString()); } return sb.toString(); } }
7,在spring的applicationContext.xml中引入spring-redis.xml
<import resource="spring-redis.xml"/>
8,编写web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/applicationContext.xml</param-value>
</context-param>
<!-- 配置编码方式-->
<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>
<!-- 配置springmvc的前端控制器 指向spring-mvc.xml 程序在启动的时候就加载springmvc 可以接受所有请求 load-on-startup：表示启动容器时初始化该Servlet； -->
<servlet>
<servlet-name>springServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 可以自定义servlet.xml配置文件的位置和名称， 默认为WEB-INF目录下，名称为[<servlet-name>]-servlet.xml，如spring-servlet.xml -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 将前端URL请求和后台处理方法controller建立对应关系-->
<servlet-mapping>
<servlet-name>springServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--<!– Spring配置 –>-->
<listener>
<listener-class> org.springframework.web.context.ContextLoaderListener </listener-class>
</listener>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
</web-app>
9,编写对应的实体类,mapper接口,controller控制器,service业务
9.1,User实体类
import com.fasterxml.jackson.core.SerializableString;
import java.io.Serializable;
public class User implements Serializable {//如果不实现Serializable接口会报错
private Integer id;
private String name;
private String sex;
private Integer age;
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 getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
9.2,编写mapper接口
package com.springredis.dao; import com.springredis.entity.User; import java.util.List; public interface UserDao { List<User> getLists(); Integer add(User user); }
9.4,在Sqlmap下编写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="com.springredis.dao.UserDao" > <select id="getLists" resultType="com.springredis.entity.User"> SELECT * FROM users </select> <insert id="add" parameterType="com.springredis.entity.User"> INSERT INTO users (name,sex,age)VALUES (#{name},#{sex},#{age}) </insert> </mapper>
9.5,编写service业务层
9.5.1:编写service接口
package com.springredis.service; import com.springredis.entity.User; import java.util.List; public interface IUserService { List<User> getLists(); Integer add(User user); }
9.5.2编写service实现类
package com.springredis.service; import com.springredis.entity.User; import com.springredis.dao.UserDao; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cache.annotation.CacheEvict; import org.springframework.cache.annotation.Cacheable; import org.springframework.stereotype.Service; import java.util.List; /** * 文件描述: * 创建用户:emotion * 创建时间:2018/6/22 */ @Service public class UserServiceImpl implements IUserService { @Autowired private UserDao userDao; @Cacheable(value="user") @Override public List<User> getLists() { System.out.println("打印语句则没有走缓存"); return userDao.getLists(); } @CacheEvict(value= "user",allEntries=true)//清空缓存， @Override public Integer add(User user) { return userDao.add(user); } }
缓存机制说明：
所有的查询结果都放进了缓存，也就是把MySQL查询的结果放到了redis中去，
然后第二次发起该条查询时就可以从redis中去读取查询的结果，从而不与MySQL交互，从而达到优化的效果，
redis的查询速度之于MySQL的查询速度相当于 内存读写速度 /硬盘读写速度
@Cacheable("users")注解的意义就是把该方法的查询结果放到redis中去，下一次再发起查询就去redis中去取，存在redis中的数据的key就是users；
要是写增加一个用户则需要把原来的key(users)清除掉
@CacheEvict(value={"users","users1"},allEntries=true) 的意思就是执行该方法后要清除redis中key名称为a,b的数据；
9.6,编写Controller控制器
package com.springredis.controller; import com.springredis.entity.User; import com.springredis.service.IUserService; 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; import org.springframework.web.bind.annotation.RestController; import java.util.List; @Controller public class UserController { @Autowired private IUserService userService; @RequestMapping("/list") @ResponseBody public List<User> getLists(){ return userService.getLists(); } @RequestMapping("/add") @ResponseBody public boolean add(User user){ return userService.add(user)>0; } }
此文章制作案例,不做具体的详解,下一篇文章做具体讲解,,