Redis,算是java中最常用的非关系型数据库之一了,至于和MongoDB的比较这里不做讨论,由于运行在内存中实在是强大,打开就跑不用过多的麻烦配置.
也有面向java的客户端Jedis可以使用.Spring也对其做了整合,大概打开Redis能找到1W+的帖子,但是笔记终归还是自己的好.Jedis不多说应用比较少,基本都是使用Spring集成:
Maven坐标:
<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>
配置文件:
<?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:dubbo="http://code.alibabatech.com/schema/dubbo" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:property-placeholder location="classpath*:properties/redis-config.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="true"/>
</bean>
<bean id="JedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
<property name="hostName" value="${redis.host}"/>
<property name="port" value="${redis.port}"/>
<property name="password" value="${redis.pass}"/>
<property name="poolConfig" ref="poolConfig"/>
</bean>
<bean class="org.springframework.data.redis.core.RedisTemplate" id="redisTemplate">
<property name="connectionFactory" ref="JedisConnectionFactory"/>
</bean>
</beans>
说明:
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；
host:redis地址
port:端口号
连接池自动管理，提供了一个高度封装的“RedisTemplate”类
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
//存 public void setValue(){ redisTemplate.boundValueOps("name").set("itcast"); } //取 public void getValue(){ String str = (String) redisTemplate.boundValueOps("name").get(); System.out.println(str); } //删除 public void deleteValue(){ redisTemplate.delete("name");; }
SetOperations：set类型数据操作
//存 public void setValue(){ redisTemplate.boundSetOps("name").add("111"); redisTemplate.boundSetOps("name").add("222"); redisTemplate.boundSetOps("name").add("333"); } //取 public void getValue(){ Set members = redisTemplate.boundSetOps("name").members(); System.out.println(members); } //删单个值 public void deleteValue(){ redisTemplate.boundSetOps("nameset").remove("111"); } //删集合 public void deleteAllValue(){ redisTemplate.delete("name"); }
ZSetOperations：zset类型数据操作
/** * 存 */ @Test public void setSet(){ Long add = redisTemplate.boundSetOps("gg").add("go"); System.out.println(add); } /** * 取 */ @Test public void getSet(){ // 取所有成员 Set set = redisTemplate.boundSetOps("gg").members(); System.out.println(set); }
HashOperations：针对map类型的数据操作
Hash方式是开发中最常用的方式
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; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = "classpath:spring/applicationContext-redis.xml") public class TestHash { @Autowired private RedisTemplate redisTemplate; /** * 存 */ @Test public void setHash(){ redisTemplate.boundHashOps("eva").put("初号机","碇真嗣"); redisTemplate.boundHashOps("eva").put("零号机","绫波丽"); redisTemplate.boundHashOps("eva").put("二号机","明日香"); } /** * 取key */ @Test public void getKey(){ Set eva = redisTemplate.boundHashOps("eva").keys(); System.out.println(eva); } /** * 取值 */ @Test public void getValue(){ String s = (String) redisTemplate.boundHashOps("eva").get("初号机"); System.out.println(s); } /** * 取所有值 */ @Test public void getAllValue(){ List<String> list = redisTemplate.boundHashOps("eva").values(); System.out.println(list); } /** * 删 */ @Test public void delete(){ redisTemplate.boundHashOps("eva").delete("二号机"); } }
ListOperations：针对list类型的数据操作
右压栈方式是将后添加的元素添加在集合的尾部,而左压栈方式是将新添加的元素插入到集合的首索引位置.
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;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:spring/applicationContext-redis.xml")
public class Testlist {
@Autowired
private RedisTemplate redisTemplate;
/**
* 压入右栈
*/
@Test
public void testSetRightValue(){
redisTemplate.boundListOps("namelist1").rightPush("仓木麻衣");
redisTemplate.boundListOps("namelist1").rightPush("新垣结衣");
redisTemplate.boundListOps("namelist1").rightPush("钉宫理惠");
}
/**
* 显示右栈集合
*/
@Test
public void showRight() {
List range = redisTemplate.boundListOps("namelist1").range(0, 10);
System.out.println(range);
}
/**
* 左压栈
*/
@Test
public void testSetLeftValue(){
redisTemplate.boundListOps("namelist2").leftPush("花泽香菜");
redisTemplate.boundListOps("namelist2").leftPush("小仓唯");
redisTemplate.boundListOps("namelist2").leftPush("民民");
}
/**
* 显示左压栈
*/
@Test
public void showLeft() {
String index1 = (String)redisTemplate.boundListOps("namelist2").index(1);
System.out.println(index1);
String index2 = (String)redisTemplate.boundListOps("namelist2").index(2);
System.out.println(index2);
String index3 = (String)redisTemplate.boundListOps("namelist2").index(3);
System.out.println(index3);
}
/**
* 移除元素
*/
@Test
public void testRemoveByIndex(){
redisTemplate.boundListOps("namelist2").remove(2,"花泽香菜");
}
/**
* 显示namelist2集合
*/
@Test
public void showLeftList(){
List namelist2 = redisTemplate.boundListOps("namelist2").range(0, 10);
System.out.println(namelist2);
}
}
原文：https://www.cnblogs.com/YuaoSun/p/9248258.html