Spring Data Redis

程序员文章站 2022-06-02 20:06:09

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文章目录

1. Spring Data Redis简介

1.1 Redis
1.2 Jedis
1.3 Spring Data Redis

2 Spring Data Redis Demo

2.1 值类型操作
2.2 Set类型操作
2.3 List类型操作
2.4 Hash类型操作

1. Spring Data Redis简介

1.1 Redis

redis是一款开源的Key-Value数据库，运行在内存中，由ANSI C编写。企业开发通常采用Redis来实现缓存。同类的产品还有memcache 、memcached 、MongoDB等。

1.2 Jedis

Jedis是Redis官方推出的一款面向Java的客户端，提供了很多接口供Java语言调用。可以在Redis官网下载，当然还有一些开源爱好者提供的客户端，如Jredis、SRP等等，推荐使用Jedis。

1.3 Spring Data Redis

Spring-data-redis是spring大家族的一部分，提供了在srping应用中通过简单的配置访问redis服务，对reids底层开发包(Jedis, JRedis, and RJC)进行了高度封装，RedisTemplate提供了redis各种操作、异常处理及序列化，支持发布订阅，并对spring 3.1 cache进行了实现。
spring-data-redis针对jedis提供了如下功能：
1.连接池自动管理，提供了一个高度封装的“RedisTemplate”类
2.针对jedis客户端中大量api进行了归类封装,将同一类型操作封装为operation接口
ValueOperations：简单K-V操作
SetOperations：set类型数据操作
ZSetOperations：zset类型数据操作
HashOperations：针对map类型的数据操作
ListOperations：针对list类型的数据操作

2 Spring Data Redis Demo

1. 创建maven工程,pom.xml中引入依赖
Spring Data Redis

    <!-- 集中定义依赖版本号 -->
    <properties>
        <spring.version>4.2.4.RELEASE</spring.version>
    </properties>

    <dependencies>
        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.9</version>
        </dependency>
        <!-- 缓存 -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.8.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-redis</artifactId>
            <version>1.7.2.RELEASE</version>
        </dependency>

    </dependencies>

2. 在src/main/resources下创建properties文件夹，建立redis-config.properties

# Redis settings 
# server IP 
redis.host=127.0.0.1
# server port 
redis.port=6379
# server pass 
redis.pass= 
# use dbIndex
redis.database=0
# \u63A7\u5236\u4E00\u4E2Apool\u6700\u591A\u6709\u591A\u5C11\u4E2A\u72B6\u6001\u4E3Aidle(\u7A7A\u95F2\u7684)\u7684jedis\u5B9E\u4F8B 
redis.maxIdle=300
# \u8868\u793A\u5F53borrow(\u5F15\u5165)\u4E00\u4E2Ajedis\u5B9E\u4F8B\u65F6\uFF0C\u6700\u5927\u7684\u7B49\u5F85\u65F6\u95F4\uFF0C\u5982\u679C\u8D85\u8FC7\u7B49\u5F85\u65F6\u95F4(\u6BEB\u79D2)\uFF0C\u5219\u76F4\u63A5\u629B\u51FAJedisConnectionException\uFF1B  
redis.maxWait=3000
# \u5728borrow\u4E00\u4E2Ajedis\u5B9E\u4F8B\u65F6\uFF0C\u662F\u5426\u63D0\u524D\u8FDB\u884Cvalidate\u64CD\u4F5C\uFF1B\u5982\u679C\u4E3Atrue\uFF0C\u5219\u5F97\u5230\u7684jedis\u5B9E\u4F8B\u5747\u662F\u53EF\u7528\u7684  
redis.testOnBorrow=true

3. 在src/main/resources下创建spring文件夹，创建applicationContext-redis.xml

<?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:mvc="http://www.springframework.org/schema/mvc" 
  xmlns:cache="http://www.springframework.org/schema/cache"
  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   
            http://www.springframework.org/schema/mvc   
            http://www.springframework.org/schema/mvc/spring-mvc.xsd 
            http://www.springframework.org/schema/cache  
            http://www.springframework.org/schema/cache/spring-cache.xsd">  
  
   <context:property-placeholder location="classpath*:properties/*.properties" />   
  
   <!-- redis 相关配置 --> 
   <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">  
     <property name="maxIdle" value="${redis.maxIdle}" />   
     <property name="maxWaitMillis" value="${redis.maxWait}" />  
     <property name="testOnBorrow" value="${redis.testOnBorrow}" />  
   </bean>  
  
   <bean id="JedisConnectionFactory" 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.RedisTemplate">  
    	<property name="connectionFactory" ref="JedisConnectionFactory" />  
   </bean>  
      
</beans>

maxIdle ：最大空闲数
maxWaitMillis:连接时的最大等待毫秒数
testOnBorrow：在提取一个jedis实例时，是否提前进行验证操作；如果为true，则得到的jedis实例均是可用的；
下面测试运行的时候可能会报下面的错误

org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
	at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:198)
	...........
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
	at redis.clients.util.Pool.getResource(Pool.java:53)
	at redis.clients.jedis.JedisPool.getResource(JedisPool.java:99)
	at redis.clients.jedis.JedisPool.getResource(JedisPool.java:12)
	at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:191)
	... 38 more
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.UnknownHostException: 127.0.0.1 
	at redis.clients.jedis.Connection.connect(Connection.java:164)
	at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:80)
	at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1677)
	at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:87)
	at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:868)
	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435)
	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363)
	at redis.clients.util.Pool.getResource(Pool.java:49)
	... 41 more
Caused by: java.net.UnknownHostException: 127.0.0.1 
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at redis.clients.jedis.Connection.connect(Connection.java:158)
	... 48 more

出错原因redis-config.properties配置中出现了不必要的空格,删除就可以了
Spring Data Redis

2.1 值类型操作

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:spring/applicationContext-redis.xml")
public class TestValue {

    @Autowired
    private RedisTemplate redisTemplate;

    //存值
    @Test
    public void setValue(){
        redisTemplate.boundValueOps("name").set("laowang");
    }

    //取值
    @Test
    public void getValue(){
        String name = (String) redisTemplate.boundValueOps("name").get();
        System.out.println(name);
    }

    //删除
    @Test
    public void deleteValue(){
        redisTemplate.delete("name");
    }
}

2.2 Set类型操作

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.Set;

/**
 * Created by : wyc
 * Created time 2020/3/17 15:56
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:spring/applicationContext-redis.xml")
public class TestSet {

    @Autowired
    private RedisTemplate redisTemplate;

    //存值
    @Test
    public void setValue(){
        redisTemplate.boundSetOps("nameSet").add("古力娜扎");
        redisTemplate.boundSetOps("nameSet").add("迪丽热巴");
        redisTemplate.boundSetOps("nameSet").add("马尔扎哈");
    }

    //取值
    @Test
    public void getValue(){
        Set nameSet = redisTemplate.boundSetOps("nameSet").members();
        System.out.println(nameSet);
    }

    //移除某一项值
    @Test
    public void removeValue(){
        redisTemplate.boundSetOps("nameSet").remove("马尔扎哈");
    }

    //删除整个set
    @Test
    public void deleteValue(){
        redisTemplate.delete("nameSet");
    }
}

2.3 List类型操作

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

/**
 * Created by : wyc
 * Created time 2020/3/17 16:11
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:spring/applicationContext-redis.xml")
public class TestList {

    @Autowired
    private RedisTemplate redisTemplate;

    //右压栈:后添加的对象排在后面
    @Test
    public void testSetValue1(){
        redisTemplate.boundListOps("namelist1").rightPush("古力娜扎");
        redisTemplate.boundListOps("namelist1").rightPush("迪丽热巴");
        redisTemplate.boundListOps("namelist1").rightPush("马尔扎哈");
    }

    //显示右压栈集合
    @Test
    public void testGetValue1(){
        List list = redisTemplate.boundListOps("namelist1").range(0, 10);
        System.out.println(list);
    }

    //左压栈：后添加的对象排在前边
    @Test
    public void testSetValue2(){
        redisTemplate.boundListOps("namelist2").leftPush("古力娜扎");
        redisTemplate.boundListOps("namelist2").leftPush("迪丽热巴");
        redisTemplate.boundListOps("namelist2").leftPush("马尔扎哈");
    }

    //显示左压栈集合
    @Test
    public void testGetValue2(){
        //没有查询全部的方法,要想查询全部只能把后面值写的级大
        List list = redisTemplate.boundListOps("namelist2").range(0, 10);
        System.out.println(list);
    }

    //查询集合某个元素
    @Test
    public void testSearchByIndex(){
        String s = (String) redisTemplate.boundListOps("namelist1").index(1);
        System.out.println(s);
    }

    //移除集合某个元素
    @Test
    public void testRemoveByIndex(){
        //参数1是移除的个数,不是元素索引
        redisTemplate.boundListOps("namelist1").remove(1, "马尔扎哈");
    }
    
    //删除所有
    @Test
    public void deleteValue(){
        redisTemplate.delete("namelist1");
    }
}

2.4 Hash类型操作

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;
import java.util.Set;

/**
 * Created by : wyc
 * Created time 2020/3/17 16:22
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:spring/applicationContext-redis.xml")
public class TestHash {

    @Autowired
    private RedisTemplate redisTemplate;

    //存值
    @Test
    public void setValue(){
        redisTemplate.boundHashOps("namehash").put("a", "古力娜扎");
        redisTemplate.boundHashOps("namehash").put("b", "迪丽热巴");
        redisTemplate.boundHashOps("namehash").put("c", "马尔扎哈");
    }

    //提取所有的KEY
    @Test
    public void testGetKeys(){
        Set s = redisTemplate.boundHashOps("namehash").keys();
        System.out.println(s);
    }

    //提取所有的值
    @Test
    public void testGetValues(){
        List values = redisTemplate.boundHashOps("namehash").values();
        System.out.println(values);
    }

    //根据KEY提取值
    @Test
    public void testGetValueByKey(){
        Object object = redisTemplate.boundHashOps("namehash").get("b");
        System.out.println(object);
    }

    //根据KEY移除值
    @Test
    public void testRemoveValueByKey(){
        redisTemplate.boundHashOps("namehash").delete("c");
    }
    @Test
    public void deleteValue(){
        redisTemplate.delete("namehash");
    }
}

Spring Data Redis

文章目录

1. Spring Data Redis简介

1.1 Redis

1.2 Jedis

1.3 Spring Data Redis

2 Spring Data Redis Demo

2.1 值类型操作

2.2 Set类型操作

2.3 List类型操作

2.4 Hash类型操作

Redis 主从复制

Mybaits 源码解析（十一）----- 设计模式精妙使用：静态代理和动态代理结合使用：@MapperScan将Mapper接口生成代理注入到Spring

缓存管理之MemoryCache与Redis的使用

Spring,SpringMvc,MyBatis用到的设计模式

Laravel 下配置 Redis 让缓存、Session 各自使用不同的 Redis 数据库

Mybaits 源码解析（十二）----- Mybatis的事务如何被Spring管理？Mybatis和Spring事务中用的Connection是同一个吗？

结合Spring Security进行web应用会话安全管理

Swoole和Redis实现的并发队列处理系统

Spring Boot 配置元数据指南

Spring Boot → 07：错误处理机制

Spring Data Redis

文章目录

1. Spring Data Redis简介

1.1 Redis

1.2 Jedis

1.3 Spring Data Redis

2 Spring Data Redis Demo

2.1 值类型操作

2.2 Set类型操作

2.3 List类型操作

2.4 Hash类型操作

Redis 主从复制

Mybaits 源码解析 （十一）----- 设计模式精妙使用：静态代理和动态代理结合使用：@MapperScan将Mapper接口生成代理注入到Spring

缓存管理之MemoryCache与Redis的使用

Spring,SpringMvc,MyBatis用到的设计模式

Laravel 下配置 Redis 让缓存、Session 各自使用不同的 Redis 数据库

Mybaits 源码解析 （十二）----- Mybatis的事务如何被Spring管理？Mybatis和Spring事务中用的Connection是同一个吗？

结合Spring Security进行web应用会话安全管理

Swoole和Redis实现的并发队列处理系统

Spring Boot 配置元数据指南

Spring Boot → 07：错误处理机制

Mybaits 源码解析（十一）----- 设计模式精妙使用：静态代理和动态代理结合使用：@MapperScan将Mapper接口生成代理注入到Spring

Mybaits 源码解析（十二）----- Mybatis的事务如何被Spring管理？Mybatis和Spring事务中用的Connection是同一个吗？