Spring整合redis
jar包地址：
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.7.3</version>
</dependency>配置文件：
<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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<!-- class annotation related... start -->
<context:component-scan base-package="com.ssm.service.impl" />
<context:component-scan base-package="com.ssm.utils" />
<!-- class annotation related... end -->
<!-- mybatis related... start -->
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:jdbc.properties</value>
<value>classpath:redis.properties</value>
</list>
</property>
</bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource "
destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl"
value="jdbc:mysql://${jdbc.host}:${jdbc.port}/${jdbc.database}?useUnicode=true&characterEncoding=utf8" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="acquireIncrement" value="1" />
<property name="initialPoolSize" value="5" />
<property name="maxPoolSize" value="20" />
<property name="minPoolSize" value="5" />
<property name="maxStatements" value="100" />
<property name="testConnectionOnCheckout" value="true" />
</bean>
<!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 <property name="mapperLocations" value="classpath:com/ssm/mapper/*.xml"></property> -->
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ssm.dao" />
</bean>
<!-- mybatis related... end -->
<!-- transaction config related... start -->
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- transaction config related... end -->
<!-- redis config start -->
<!-- 配置JedisPoolConfig实例 -->
<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxIdle" value="${redis.maxIdle}" />
<property name="maxTotal" value="${redis.maxActive}" />
<property name="maxWaitMillis" value="${redis.maxWait}" />
<property name="testOnBorrow" value="${redis.testOnBorrow}" />
</bean>
<!-- 配置JedisConnectionFactory -->
<bean id="jedisConnectionFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
<property name="hostName" value="${redis.host}" />
<property name="port" value="${redis.port}" />
<!-- <property name="password" value="${redis.pass}" /> -->
<property name="database" value="${redis.dbIndex}" />
<property name="poolConfig" ref="poolConfig" />
</bean>
<!-- 配置RedisTemplate -->
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory" />
</bean>
<!-- 配置RedisCacheManager -->
<bean id="redisCacheManager" class="org.springframework.data.redis.cache.RedisCacheManager">
<constructor-arg name="redisOperations" ref="redisTemplate" />
<property name="defaultExpiration" value="${redis.expiration}" />
</bean>
<!-- 配置RedisCacheConfig -->
<bean id="redisCacheConfig" class="com.ssm.utils.RedisCacheConfig">
<constructor-arg ref="jedisConnectionFactory" />
<constructor-arg ref="redisTemplate" />
<constructor-arg ref="redisCacheManager" />
</bean>
<!-- redis config end -->
</beans>测试代码：
public static void main(String[] args) {
//连接本地的 Redis 服务
Jedis jedis = new Jedis("localhost");
System.out.println("连接成功");
//查看服务是否运行
System.out.println("服务正在运行: "+jedis.ping());
//设置 redis 字符串数据Exception in thread "main" redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused: connect
jedis.get("redis");
// 获取存储的数据并输出
System.out.println("redis 存储的字符串为: "+ jedis.get("redis"));
}如图表示连接成功：
redis在项目中应用
Controller实现：以Json形式返回，这里进行读取并存储，仅供参考
@Controller
@RequestMapping("/uesrrdeis/")
public class UserController {
@Autowired
private UserService userService;
/**
*
* @Title: showUser
* @Description: 查询用户
* @param @param model
* @param @return 参数
* @return String 返回类型
* @throws
*/
@RequestMapping("showUser")
public void showUser(Model model,HttpServletRequest req,HttpServletResponse res)throws Exception{
System.out.println("----showUser----");
List<User> userList = new ArrayList<User>();
userList = userService.getAllUser();
Jedis jedis = new Jedis("localhost");
model.addAttribute("userList",userList);
JSONArray jsonArr = JSONArray.fromObject(userList);
//设置 redis 字符串数据
jedis.set("redis", userList.toString());
//获取存储的数据并输出
System.out.println("redis 存储的字符串为: "+ jedis.get("redis"));
res.setCharacterEncoding("utf-8");
PrintWriter writer = res.getWriter();
writer.write(jsonArr.toString());
writer.close();
//return "showUser";
}Service实现：
/**
*
* @ClassName: UserServiceImpl
* @Description: 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("a")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a；
* @CacheEvict(value={"a","b"},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；
* @author yang hai ji
* @date 2018年4月19日
*/
@Service("userService")
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
@Cacheable("getAllUser") //标注该方法查询的结果进入缓存，再次访问时直接读取缓存中的数据
@Override
public List<User> getAllUser() {
return this.userMapper.selectAllUser();
}1.页面展示：
2.redis展示：
3.控制台展示：
