Spring集成Redis详解代码示例

本文章从头开始介绍Spring集成Redis的示例。

Eclipse工程结构

如下图为我的示例工程的结构图，采用Maven构建。其中需要集成Spring，因此需要beans.xml文件配置spring的依赖注入，redis.properties配置连接服务器的配置信息。

其中工程中beans.xml和redis.properties文件直接放在了根目录，有需要的读者可以放到resource目录中。

POM依赖

如下为示例POM依赖，Spring集成redis需要依赖的包为：jedis包，spring-context模块及依赖的包，spring-data-redis模块包，spring-test包用于JUnit测试，pom.xml文件内容如下：

<project xmlns="https://maven.apache.org/POM/4.0.0" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation="https://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelversion>4.0.0</modelversion>

<groupid>com.test</groupid>
 JavaTest</artifactid>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>jar</packaging>

<name>JavaTest</name>
 <url>https://maven.apache.org</url>

<properties>
   <project.build.sourceencoding>UTF-8</project.build.sourceencoding>
 </properties>

<dependencies>
   <dependency>
     <groupid>junit</groupid>
     junit</artifactid>
     <version>4.12</version>
     <scope>test</scope>
   </dependency>
   <dependency>
     <groupid>redis.clients</groupid>
     jedis</artifactid>
     <version>2.5.1</version>
   </dependency>
   <dependency>
     <groupid>org.springframework</groupid>
     spring-context</artifactid>
     <version>4.2.6.RELEASE</version>
     <scope>runtime</scope>
   </dependency>
   <dependency>
     <groupid>org.springframework</groupid>
     spring-test</artifactid>
     <version>4.2.6.RELEASE</version>
     <scope>runtime</scope>
   </dependency>
   <dependency>
     <groupid>org.springframework.data</groupid>
     spring-data-redis</artifactid>
     <version>1.7.2.RELEASE</version>
   </dependency>
 </dependencies>
</project>

Spring配置

Spring配置文件beans.xml的配置如下：

<!--?xml version="1.0" encoding="UTF-8"?-->
<beans xmlns="https://www.springframework.org/schema/beans" xmlns:aop="https://www.springframework.org/schema/aop" xmlns:context="https://www.springframework.org/schema/context" xmlns:jee="https://www.springframework.org/schema/jee" xmlns:p="https://www.springframework.org/schema/p" xmlns:tx="https://www.springframework.org/schema/tx" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation="
     https://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
     https://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
 <!-- 加载classpath下的Redis配置文件 -->
 <context:property-placeholder location="classpath:redis.properties">

<bean class="redis.clients.jedis.JedisPoolConfig" id="poolConfig">
   <property name="maxIdle" value="${redis.maxIdle}">
   <property name="testOnBorrow" value="${redis.testOnBorrow}">
 </property></property></bean>

<bean class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" id="connectionFactory" p:host-name="${redis.host}" p:password="${redis.pass}" p:pool-config-ref="poolConfig" p:port="${redis.port}">

<!-- spring提供的模板类 -->
 <bean class="org.springframework.data.redis.core.StringRedisTemplate" id="redisTemplate">
   <property name="connectionFactory" ref="connectionFactory">
 </property></bean>

<bean class="com.redis.test.UserDao" id="userDao">
   <property name="redisTemplate" ref="redisTemplate">
 </property></bean>

</bean></context:property-placeholder></beans>

在beans.xml配置文件中，需要先加载redis.properties文件。

Redis配置信息

Redis的配置信息在redis.properties文件中配置：

# Redis地址和端口和连接密码
redis.host=localhost
redis.port=6379
redis.pass=

redis.maxIdle=300
redis.testOnBorrow=true

此示例，连接Redis服务器时没有设置连接密码，因此不用填值。

Java代码

User.java

package com.redis.test;
import java.io.Serializable;
public class User implements Serializable {
private static final long serialVersionUID = 3409768855488864675L;
private String id;
private String name;
private String password;
public User() {
}
public User(String id, String name, String password) {
this.id = id;
this.name = name;
this.password = password;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String toString() {
return "User [id=" + id + ", name=" + name + ", password=" + password + "]";
}
}

AbstractRedisBaseDao.java

package com.redis.test;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
public abstract class AbstractRedisBaseDao<k, v=""> {
 protected RedisTemplate<k, v=""> redisTemplate;
public RedisTemplate<k, v=""> getRedisTemplate() {
return redisTemplate;
}
public void setRedisTemplate(RedisTemplate<k, v=""> redisTemplate) {
this.redisTemplate = redisTemplate;
}
/**
  * 获取 RedisSerializer
  */
protected RedisSerializer<string> getRedisSerializer() {
return redisTemplate.getStringSerializer();
}
}

IUserDao.java

package com.redis.test;
import java.util.List;
public interface IUserDao {
/** 新增 */
Boolean add(User user);
/** 批量新增，pipeline方式 */
Boolean add(List<user> list);
/** 删除 */
void delete(String key);
/** 批量删除 */
void delete(List<string> keys);
/** 更新 */
Boolean update(User user);
/** 读取 */
User get(String keyId);
}

UserDao.java

package com.redis.test;
import java.util.List;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.util.Assert;
public class UserDao extends AbstractRedisBaseDao<string, user=""> implements IUserDao {
 public Boolean add(final User user) {
Boolean result = redisTemplate.execute(new RedisCallback<Boolean>() {
public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
RedisSerializer<string> serializer = getRedisSerializer();
byte[] key = serializer.serialize(user.getId());
// 将ID序列化成key
byte[] value = serializer.serialize(user.getName());
return connection.setNX(key, value);
}
}
);
return result;
}
public Boolean add(final List<user> list) {
Assert.notEmpty(list);
Boolean result = redisTemplate.execute(new RedisCallback<Boolean>() {
public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
RedisSerializer<string> serializer = getRedisSerializer();
for (int i = 0; i < list.size(); i++) {
User user = list.get(i);
byte[] key = serializer.serialize(user.getId());
// 将ID序列化成key
byte[] value = serializer.serialize(user.getName());
connection.setNX(key, value);
}
return true;
}
}
, false, true);
return result;
}
public void delete(String key) {
redisTemplate.delete(key);
}
public void delete(List<string> keys) {
redisTemplate.delete(keys);
}
public Boolean update(final User user) {
String key = user.getId();
if(get(key) == null) {
throw new NullPointerException("数据行不存在,key = " + key);
}
Boolean result = redisTemplate.execute(new RedisCallback<Boolean>() {
public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
RedisSerializer<string> serializer = getRedisSerializer();
byte[] key = serializer.serialize(user.getId());
// 将ID序列化成key
byte[] value = serializer.serialize(user.getName());
connection.set(key, value);
return true;
}
}
);
return result;
}
public User get(final String keyId) {
User user = redisTemplate.execute(new RedisCallback<user>() {
public User doInRedis(RedisConnection connection) throws DataAccessException {
RedisSerializer<string> serializer = getRedisSerializer();
byte[] key = serializer.serialize(keyId);
byte[] value = connection.get(key);
if(value == null) {
return null;
}
String name = serializer.deserialize(value);
return new User(keyId, name, null);
}
}
);
return user;
}
}

RedisTest.java（JUnit测试类）

package com.redis.test;
import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
import org.springframework.util.Assert;
/**
* junit在Spring context环境下测试
*/
@ContextConfiguration(locations={"classpath*:beans.xml"})
public class RedisTest extends AbstractJUnit4SpringContextTests {
@Autowired
 private IUserDao userDao;
/** 增加单个用户 */
@Test
 public void testAddUser() {
User user = new User("user1", "password1", null);
Boolean result = userDao.add(user);
Assert.isTrue(result);
System.out.println("添加结果：" + result);
}
/** 批量新增普通方式,5286ms */
@Test
 public void testAddUsers1() {
List<user> list = new ArrayList<user>();
for (int i = 10; i < 50000; i++) {
User user = new User();
user.setId("user" + i);
user.setName("password" + i);
list.add(user);
}
long begin = System.currentTimeMillis();
for (User user : list) {
userDao.add(user);
}
System.out.println(System.currentTimeMillis() - begin);
}
/** 批量新增pipeline方式,484ms */
@Test
 public void testAddUsers2() {
List<user> list = new ArrayList<user>();
for (int i = 50000; i < 100000; i++) {
User user = new User();
user.setId("user" + i);
user.setName("password" + i);
list.add(user);
}
long begin = System.currentTimeMillis();
Boolean result = userDao.add(list);
Assert.isTrue(result);
System.out.println(System.currentTimeMillis() - begin);
}
/** 更新 */
@Test
 public void testUpdate() {
User user = new User();
user.setId("user1");
user.setName("new_password");
Boolean result = userDao.update(user);
Assert.isTrue(result);
}
/** 删除 */
@Test
 public void testDelete() {
String key = "user1";
userDao.delete(key);
}
/** 批量删除 */
@Test
 public void testDeletes() {
List<string> list = new ArrayList<string>();
for (int i = 0; i < 10; i++) {
list.add("user" + i);
}
userDao.delete(list);
}
/** 读取 */
@Test
 public void testGetUser() {
String id = "user1";
User user = userDao.get(id);
Assert.notNull(user);
System.out.println(user);
}
}

总结

浅谈spring 常用注解

spring中的FactoryBean代码示例

浅谈Spring的两种配置容器

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