Spring整合Redis

Spring整合Redis

1.引入redis jar包

2.配置spring配置文件applicationContext.xml

<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" />

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

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

    
    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
        <property name="connectionFactory" ref="connectionFactory" />
    bean>

    <bean id="studentDao" class="impl.StudentDaoImpl">
        <property name="redisTemplate" ref="redisTemplate" />
    bean>

beans>

3.redis设置

# Redis settings  
#服务器ip，下面是本地
host=127.0.0.1 
#端口，默认6379
port=6379  
#redis连接密码，默认没有设
pass= 

#最大能够保持idel状态的对象数 
maxIdle=300 
#最大分配的对象数   
maxActive=600  
#当池内没有返回对象时，最大等待时间 
maxWait=1000  
#当调用borrow Object方法时，是否进行有效性检查 
testOnBorrow=true  

4.BaseRedisDao

import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;

public abstract class BaseRedisDao {

    protected RedisTemplate redisTemplate;

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

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

5.StudentDao

import java.util.List;

import entity.Student;

public interface StudentDao {

    /**
     * 新增
     * 
     * @param user
     * @return
     */
    boolean add(Student student);

    /**
     * 批量新增 使用pipeline方式
     * 
     * @param list
     * @return
     */
    boolean add(List list);

    /**
     * 删除
     * 
     * @param key
     */
    void delete(String key);

    /**
     * 删除多个
     * 
     * @param keys
     */
    void delete(List keys);

    /**
     * 修改
     * 
     * @param user
     * @return
     */
    boolean update(Student student);

    /**
     * 通过key获取
     * 
     * @param keyId
     * @return
     */
    Student get(String keyId);
}

6.StudentDao实现，继承了BaseRedisDao抽象类，其中redisTemplate在spring配置文件中已经注入了值。实现方法中使用了匿名内部类，和回调函数，将要缓存的数据进行序列化处理。Java8之前要求匿名内部类中操作外部类成员变量或局部变量的时候要定义为final，Java8后就更加灵活，不要求是final。后面还有删除更新，查询的操作都是一样的，可以自己试着写写。

public class StudentDaoImpl extends BaseRedisDao<String, Student> implements StudentDao {

    @Override
    public boolean add(final Student student) {
    boolean result = redisTemplate.execute(new RedisCallback() {
        public Boolean doInRedis(RedisConnection connection) throws DataAccessException {
        RedisSerializer serializer = getRedisSerializer();
        byte[] key = serializer.serialize(student.getId());
        byte[] name = serializer.serialize(student.getName());
        return connection.setNX(key, name);
        }
    });
    return result;
    }

    @Override
    public boolean add(List list) {
    // TODO Auto-generated method stub
    return false;
    }

    @Override
    public void delete(String key) {
    // TODO Auto-generated method stub

    }

    @Override
    public void delete(List keys) {
    // TODO Auto-generated method stub

    }

    @Override
    public boolean update(Student student) {
    // TODO Auto-generated method stub
    return false;
    }

    @Override
    public Student get(String keyId) {
    // TODO Auto-generated method stub
    return null;
    }

}

7.测试

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import dao.StudentDao;
import entity.Student;

public class Test {

    public static void main(String[] args) {
      ApplicationContext atc = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
      StudentDao dao = (StudentDao)atc.getBean("studentDao");
      Student student = new Student();
      student.setId("1");
      student.setName("zhangsan");
      dao.add(student);
    }
}

8.在redis客户端获得key对应的value值