SSM+Redis采用spring-data方式整合

SSM整合redis ,将redis整合作为第三方缓存。

思路：

1、首先安装Redis (点击打开链接)http://www.runoob.com/redis/redis-tutorial.html

2、创建SSM项目。附上pom文件

3、在MyBatis配置文件中开启二级缓存

4、在需要使用缓存的mapper中引用

话不多说直接上源码：

目录结构：

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pom.xml

<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>SSMRedis2</groupId>
<artifactId>SSMRedis2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name />
<description />
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- spring版本号 -->
<spring.version>4.3.7.RELEASE</spring.version>
<!-- mybatis版本号 -->
<mybatis.version>3.4.1</mybatis.version>
<!-- log4j日志文件管理包版本 -->
<slf4j.version>1.7.7</slf4j.version>
<log4j.version>1.2.17</log4j.version>
<!-- mybatis和spring整合的jar -->
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<!-- mysql链接的jar -->
<mysql.connector.version>5.0.8</mysql.connector.version>
<!-- json版本号 -->
<jackson.version>2.8.2</jackson.version>
<!-- Spring aop依赖的包 -->
<aspectj.version>1.6.12</aspectj.version>
<!-- hibernate数据校验的包 -->
<hibernate.validator.version>5.1.1.Final</hibernate.validator.version>
<!-- jstl -->
<jstl.version>1.2</jstl.version>
<!-- servlet版本 -->
<Servlet-version>2.5</Servlet-version>
<!-- sqlServer connector -->
<sqljdbc4-version>4.0</sqljdbc4-version>
<!-- C3P0连接池 版本 -->
<c3p0-version>0.9.2.1</c3p0-version>
</properties>

<dependencies>
<!-- aspectjweaver aop start -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${aspectj.version}</version>
</dependency>
<!-- aspectjweaver aop start -->

<!-- hibernate-validator -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${hibernate.validator.version}</version>
</dependency>

<!-- 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 start -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>

<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!--mybatis end -->

<!-- mysql-connector -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.connector.version}</version>
</dependency>
<!-- mysql-connector -->

<!-- sqlServer-connector -->
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>sqljdbc4</artifactId>
<version>${sqljdbc4-version}</version>
</dependency>
<!-- sqlServer-connector -->

<!-- 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>
<!-- log end -->

<!-- jackson star -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.3</version>
</dependency>

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- jackson star -->

<!-- c3p0 star -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>${c3p0-version}</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>mchange-commons-java</artifactId>
<version>0.2.12</version>
</dependency>
<!-- c3p0 star -->

<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>

<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>

<!-- jedis start -->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
<!-- jedis end -->

<!-- spring-data-redis start -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons</artifactId>
<version>1.8.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>1.8.4.RELEASE</version>
</dependency>
<!-- spring-data-redis end -->

<!-- Servlet 标准版本 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${Servlet-version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-war-plugin</artifactId>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

Mybatis配置文件：

Mapper文件：

 <cache type="com.SSMRedis2.utils.RedisCache" />  

需要使用缓存的话 只要添加 useCache="true"

applicationContext-redis.xml：

RedisCache：

package com.SSMRedis2.utils;

import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;

import org.apache.ibatis.cache.Cache;
import org.springframework.data.redis.connection.jedis.JedisConnection;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;

import redis.clients.jedis.exceptions.JedisConnectionException;

/**
* 通过重写Cache类中的方法，将mybatis中默认的缓存空间映射到redis空间中。
* 
* @author Administrator
* 
*/
public class RedisCache implements Cache {

private static JedisConnectionFactory jedisConnectionFactory;

private final String id;

private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();

public RedisCache(final String id) {
if (id == null) {
throw new IllegalArgumentException("Cache instances require an ID");
}
this.id = id;
}

@Override
public void clear() {
JedisConnection connection = null;
try {
connection = (JedisConnection) jedisConnectionFactory
.getConnection(); // 连接清除数据
connection.flushDb();
connection.flushAll();
} catch (JedisConnectionException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.close();
}
}
}

@Override
public String getId() {
return this.id;
}

@Override
public Object getObject(Object key) {
Object result = null;
JedisConnection connection = null;
try {
connection = (JedisConnection) jedisConnectionFactory
.getConnection();
RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer(); // 借用spring_data_redis.jar中的JdkSerializationRedisSerializer.class
result = serializer.deserialize(connection.get(serializer
.serialize(key))); // 利用其反序列化方法获取值
} catch (JedisConnectionException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.close();
}
}
return result;
}

@Override
public ReadWriteLock getReadWriteLock() {
return this.readWriteLock;
}

@Override
public int getSize() {
int result = 0;
JedisConnection connection = null;
try {
connection = (JedisConnection) jedisConnectionFactory
.getConnection();
result = Integer.valueOf(connection.dbSize().toString());
} catch (JedisConnectionException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.close();
}
}
return result;
}

@Override
public void putObject(Object key, Object value) {
JedisConnection connection = null;
try {
connection = (JedisConnection) jedisConnectionFactory
.getConnection();
RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer(); // 借用spring_data_redis.jar中的JdkSerializationRedisSerializer.class
connection.set(serializer.serialize(key),
serializer.serialize(value)); // 利用其序列化方法将数据写入redis服务的缓存中

} catch (JedisConnectionException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.close();
}
}
}

@Override
public Object removeObject(Object key) {
JedisConnection connection = null;
Object result = null;
try {
connection = (JedisConnection) jedisConnectionFactory
.getConnection();
RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer();
result = connection.expire(serializer.serialize(key), 0);
} catch (JedisConnectionException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.close();
}
}
return result;
}

public static void setJedisConnectionFactory(
JedisConnectionFactory jedisConnectionFactory) {
RedisCache.jedisConnectionFactory = jedisConnectionFactory;
}
}

RedisCacheTransfer类

SMM的整合就不多说了，第二次查询数据不会再走数据库，而是读取缓存，成功！