Spring+SpringMVC+Mybatis整合redis

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>
  <!--&lt;!&ndash; Spring配置 &ndash;&gt;-->

  <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,,