1，利用spring-data-redis整合
项目使用的pom.xml：
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<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>com.x.redis</groupId> <artifactId>Spring_redis</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <name>Spring_redis</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.0.2.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>3.1.2.RELEASE</version> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.1.0</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.8.2</version> <scope>test</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.1</version> </dependency> <!-- 将现有的jakarta commons logging的调用转换成lsf4j的调用。 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.6.1</version> </dependency> <!-- Hack：确保commons-logging的jar包不被引入，否则将和jcl-over-slf4j冲突 --> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.1</version> <scope>provided</scope> </dependency> <!-- slf4j的实现：logback，用来取代log4j。更快、更强！ --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.24</version> <scope>runtime</scope> </dependency> </dependencies></project> |
除了log部分，只有一个spring core 和 spring-data-redis了
项目文件目录结构：
applicationContext.xml：
1，context:property-placeholder 标签用来导入properties文件。从而替换${redis.maxIdle}这样的变量。
2，context:component-scan 是为了在com.x.redis.dao报下的类能够实用spring的注解注入的方式。
3，事实上我们只需要把JedisPoolConfig配数来就好了，接下来就是spring的封装了。所以直接看UserDAOImpl的实现就明白了。
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<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:property-placeholder location="classpath:redis.properties" /> <context:component-scan base-package="com.x.redis.dao"> </context:component-scan> <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxIdle" value="${redis.maxIdle}" /> <property name="maxActive" value="${redis.maxActive}" /> <property name="maxWait" value="${redis.maxWait}" /> <property name="testOnBorrow" value="${redis.testOnBorrow}" /> </bean> <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:pool-config-ref="poolConfig"/> <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate"> <property name="connectionFactory" ref="connectionFactory" /> </bean> <bean id="userDAO" class="com.x.redis.dao.impl.UserDAOImpl" /> </beans> |
redis.properties：
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# Redis settings#redis.host=192.168.20.101#redis.port=6380#redis.pass=foobaredredis.host=127.0.0.1redis.port=6379redis.pass= redis.maxIdle=300redis.maxActive=600redis.maxWait=1000redis.testOnBorrow=true |
UserDAOImpl：
1，spring对dao层的封装很多用了类似于下面代码的模板方式。
2，RedisTemplate就是spring对redis的一个封装而已。
java" id="highlighter_839733">
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public class UserDAOImpl implements UserDAO { @Autowired protected RedisTemplate<Serializable, Serializable> redisTemplate; public void saveUser(final User user) { redisTemplate.execute(new RedisCallback<Object>() { @Override public Object doInRedis(RedisConnection connection) throws DataAccessException { connection.set(redisTemplate.getStringSerializer().serialize("user.uid." + user.getId()), redisTemplate.getStringSerializer().serialize(user.getName())); return null; } }); } @Override public User getUser(final long id) { return redisTemplate.execute(new RedisCallback<User>() { @Override public User doInRedis(RedisConnection connection) throws DataAccessException { byte[] key = redisTemplate.getStringSerializer().serialize("user.uid." + id); if (connection.exists(key)) { byte[] value = connection.get(key); String name = redisTemplate.getStringSerializer().deserialize(value); User user = new User(); user.setName(name); user.setId(id); return user; } return null; } }); } } |
其他：
User：
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public class User { private long id; private String name; public long getId() { return id; } public void setId(long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }} |
测试代码：
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public static void main(String[] args) { ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/applicationContext.xml"); UserDAO userDAO = (UserDAO)ac.getBean("userDAO"); User user1 = new User(); user1.setId(1); user1.setName("obama"); userDAO.saveUser(user1); User user2 = userDAO.getUser(1); System.out.println(user2.getName()); } |
2，不利用spring-data-redis整合
个人觉得这样整合灵活度更大，能够更加明了的完成任务。
pom.xml:
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<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>com.d.work</groupId> <artifactId>Redis_Templete</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <name>Redis_Templete</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.1.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>3.1.2.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>3.1.2.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>3.1.2.RELEASE</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.1</version> </dependency> <!-- 将现有的jakarta commons logging的调用转换成lsf4j的调用。 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.6.1</version> </dependency> <!-- Hack：确保commons-logging的jar包不被引入，否则将和jcl-over-slf4j冲突 --> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.1</version> <scope>provided</scope> </dependency> <!-- slf4j的实现：logback，用来取代log4j。更快、更强！ --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.24</version> <scope>runtime</scope> </dependency> </dependencies></project> |
目录结构：
data-source.xml
1，context:property-placeholder 和 context:component-scan 前面解释过啦。
2，配置了一个ShardedJedisPool，在jdeis里 还有个JedisPool。这两个的区别:
一个是分片形式，可以连接有主备的redis服务端，一个是单个的。详细后续学习
3，因为不使用spring-data-redis的封装，所以自己要自己封装一个
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<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" 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"> <context:property-placeholder location="classpath:redis.properties" /> <context:component-scan base-package="com.d.work.main"> </context:component-scan> <context:component-scan base-package="com.d.work.redis"> </context:component-scan> <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxActive" value="50" /> <property name="maxIdle" value="8" /> <property name="maxWait" value="1000" /> <property name="testOnBorrow" value="true"/> <property name="testOnReturn" value="true"/> <!-- <property name="testWhileIdle" value="true"/> --> </bean> <bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool" scope="singleton"> <constructor-arg index="0" ref="jedisPoolConfig" /> <constructor-arg index="1"> <list> <bean class="redis.clients.jedis.JedisShardInfo"> <constructor-arg name="host" value="${redis.host}" /> <constructor-arg name="port" value="${redis.port}" /> <constructor-arg name="timeout" value="${redis.timeout}" /> <constructor-arg name="weight" value="1" /> </bean> </list> </constructor-arg> </bean></beans> |
RedisDataSource:定义三个方法
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public interface RedisDataSource { public abstract ShardedJedis getRedisClient(); public void returnResource(ShardedJedis shardedJedis); public void returnResource(ShardedJedis shardedJedis,boolean broken);} |
实现redisDataSource:
1, 注入配置好的ShardedJedisPool，这三个方法的作用：
- getRedisClient() ： 取得redis的客户端，可以执行命令了。
- returnResource(ShardedJedis shardedJedis) ： 将资源返还给pool
- returnResource(ShardedJedis shardedJedis, boolean broken) : 出现异常后，将资源返还给pool （其实不需要第二个方法）
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@Repository("redisDataSource")public class RedisDataSourceImpl implements RedisDataSource { private static final Logger log = LoggerFactory.getLogger(RedisDataSourceImpl.class); @Autowired private ShardedJedisPool shardedJedisPool; public ShardedJedis getRedisClient() { try { ShardedJedis shardJedis = shardedJedisPool.getResource(); return shardJedis; } catch (Exception e) { log.error("getRedisClent error", e); } return null; } public void returnResource(ShardedJedis shardedJedis) { shardedJedisPool.returnResource(shardedJedis); } public void returnResource(ShardedJedis shardedJedis, boolean broken) { if (broken) { shardedJedisPool.returnBrokenResource(shardedJedis); } else { shardedJedisPool.returnResource(shardedJedis); } }} |
第二层的封装：RedisClientTemplate，例子实现了放值和取值。最后代码提供了全部命令的实现。
代码就是映射性质的又一次调用jedis的方法而已，用了个broken来做标示符，决定返还资源的方式。
这一层的目的主要也是让再上层的调用不需要关心pool中链接的取得和返还问题了。
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@Repository("redisClientTemplate")public class RedisClientTemplate { private static final Logger log = LoggerFactory.getLogger(RedisClientTemplate.class); @Autowired private RedisDataSource redisDataSource; public void disconnect() { ShardedJedis shardedJedis = redisDataSource.getRedisClient(); shardedJedis.disconnect(); } /** * 设置单个值 * * @param key * @param value * @return */ public String set(String key, String value) { String result = null; ShardedJedis shardedJedis = redisDataSource.getRedisClient(); if (shardedJedis == null) { return result; } boolean broken = false; try { result = shardedJedis.set(key, value); } catch (Exception e) { log.error(e.getMessage(), e); broken = true; } finally { redisDataSource.returnResource(shardedJedis, broken); } return result; } /** * 获取单个值 * * @param key * @return */ public String get(String key) { String result = null; ShardedJedis shardedJedis = redisDataSource.getRedisClient(); if (shardedJedis == null) { return result; } boolean broken = false; try { result = shardedJedis.get(key); } catch (Exception e) { log.error(e.getMessage(), e); broken = true; } finally { redisDataSource.returnResource(shardedJedis, broken); } return result; }} |
测试代码：
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public static void main(String[] args) { ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/data-source.xml"); RedisClientTemplate redisClient = (RedisClientTemplate)ac.getBean("redisClientTemplate"); redisClient.set("a", "abc"); System.out.println(redisClient.get("a"));} |
附上RedisClientTemplate全部实现：
RedisClientTemplate代码太多，附上下载地址：RedisClientTemplate.rar
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/tankaixiong/p/3660075.html
