Spring Data Redis 使用

Spring Data Redis使用

Spring Data Redis 使用键值对存储数据方式及提供了高度抽象的模板对Redis接收/发送消息进行管理,和其他Spring Data系列的操作差不多。由于Redis是基于键值对存储数据,Spring Data Redis依赖于Spring Data Common和Spring Data KeyValue。以下内容基于今年发布的1.7.2版本的SPring Data Redis。


Spring Data Redis 配置

首先在idea中创建maven项目,不选择模板,如下图配置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>4.0.0modelVersion>

    <groupId>com.luzhugroupId>
    <artifactId>redis2artifactId>
    <version>1.0-SNAPSHOTversion>
    <dependencies>
        
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>3.8.1version>
        dependency>
        
        <dependency>
            <groupId>redis.clientsgroupId>
            <artifactId>jedisartifactId>
            <version>2.7.3version>
        dependency>
        
        <dependency>
            <groupId>org.springframework.datagroupId>
            <artifactId>spring-data-redisartifactId>
            <version>1.7.2.RELEASEversion>
        dependency>
    dependencies>

project>

选择项目右键 make moudle,自动处理依赖。

基于Template方式

  • 首先在resouce下右键新建xml,选择是spring Config,名字为spring-redis.xml,配置如下:

<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"
       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:property-placeholder>
    
    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxIdle" value="${redis.maxIdle}">property>
        <property name="maxWaitMillis" value="${redis.maxWaitMillis}">property>
        <property name="testOnBorrow" value="${redis.testOnBorrow}">property>
    bean>
    
    <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
            p:hostName="${redis.host}"
            p:port="${redis.port}"
            p:password="${redis.password}"
            p:poolConfig-ref="jedisPoolConfig">
    bean>
    
    <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
        <property name="connectionFactory" ref="jedisConnectionFactory">property>
    bean>
    
    <context:component-scan base-package="com.luzhu.*">context:component-scan>
beans>

redis 连接配置Property如下:

redis.maxIdle=10
redis.maxWaitMillis=6000
redis.testOnBorrow=true
redis.host=127.0.0.1
redis.port=6379
redis.password=root
  • 模型类
public class User {
    private String id;
    private String name;
    private String 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;
    }
}
  • BaseRedisDao
public class BaseRedisDao<K,V> {
    @Resource
    protected RedisTemplate redisTemplate;

    public RedisTemplate getRedisTemplate() {
        return redisTemplate;
    }

    public void setRedisTemplate(RedisTemplate redisTemplate) {
        this.redisTemplate = redisTemplate;
    }

    protected RedisSerializer getRedisSerializer(){
        return redisTemplate.getStringSerializer();
    }

}
  • UserDao
public interface UserDao {
    public boolean addUser(User user);
}
  • UserDaoImpl
@Component
public class UserDaoImpl extends BaseRedisDao<String,User> implements UserDao{


    public boolean addUser(final User user) {
        boolean result=redisTemplate.execute(new RedisCallback() {
            public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
                RedisSerializer serializer=getRedisSerializer();
                byte[] key=serializer.serialize(user.getId());
                byte[] name=serializer.serialize(user.getName());
                return connection.setNX(key,name);
            }
        });
        return result;
    }
}
  • 测试类 UserDaoImplTest
@ContextConfiguration(locations = {"classpath:spring-redis.xml"})
public class UserDaoTest extends AbstractJUnit4SpringContextTests{
    @Autowired
    private UserDao userDao;

    @Test
    public void testAddUser(){
        User user=new User();
        user.setId("usedffr341");
        user.setName("userName34");
        user.setPassword("zxc");
        boolean result=userDao.addUser(user);
        Assert.assertTrue(result);
    }
}

基于Template方式,基本上是调用redisTemplate或是RedisConnection的方法,
RedisConnection提供了对Redis的大部分操作。这种方式操作Redis比较方便,但有时比较麻烦,下面的方式基于repository,这种方式和Spring Data JPA/MongoDB方式差不多,用起来基本方便。

基于Repository的方式

基于Repository的方式目前只提供Class配置的方式(官网上没找到基于xml配置),所以一开始根据新建一个AppConfig类,在类上新增注解@EnableRedisRepositories,设置repository包所在,开启RedisRepository方式,在类中配置了connectionFactory和redisTemplate。如下:

@Configuration
@EnableRedisRepositories(basePackages = {"com.luzhu.*"},redisTemplateRef="redisTemplate")
public class AppConfig {
    @Bean
    public RedisConnectionFactory connectionFactory(){
        return new JedisConnectionFactory();
    }
    @Bean()
    public RedisTemplate redisTemplate(){
        RedisTemplate<byte[],byte[]> template=new RedisTemplate<byte[], byte[]>();
        template.setConnectionFactory(connectionFactory());
        return template;
    }
}

创建模型类,在模型类中添加@RedisHash注解,可以设置有效时间,在key上写@Id注解。

@RedisHash(value = "work")
public class Work {
    @Id
    private String id;
    @Indexed
    private String name;

    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;
    }
}

创建WorkDao 接口,让其继承spring data common 的CrudRepository接口,这个接口实现了基本的增删查改方法。

public interface WorkDao extends CrudRepository<Work,String> {
}

可以测试以下了,如下:

@ContextConfiguration(classes={AppConfig.class})
public class WorkDaoTest extends AbstractJUnit4SpringContextTests {
    @Autowired
    private WorkDao workDao;
    @Test
    public void test(){
        Work work=new Work();
//        work.setName("work_nfdfddfame");
//        work.setId("dssdfdkfdkdfdfdffdk");
//        workDao.save(work);
        Iterable works=workDao.findAll();
        for(Work tWork:works){
            System.out.println(tWork.getId()+" "+tWork.getName());
        }

    }
}

基于Repository的方式目前只在高版本的Spring Data Redis才实现。

总结

在俩种方式中,基于Template方式使用起来比较自由,实现的功能比较多,而Repository方式目前实现功能较少。具体使用文档可以参照http://docs.spring.io/spring-data/redis/docs/1.7.2.RELEASE/reference/html/。

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