spring-data-redis,jedis和redis主从集成和遇到的问题
Redis主从加哨兵的部署详见http://www.cnblogs.com/dupang/p/6414365.html
spring-data-redis和jedis集成代码总体结构
代码地址https://github.com/dupang/redistestwithspring
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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>redistest</groupId>
<artifactId>springredis</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>springredis Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<springframework.version>4.3.6.RELEASE</springframework.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>1.8.0.RELEASE</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
</dependencies>
<build>
<finalName>springredis</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
RedisTest.java
package com.dupang.redis; import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext; /**
* Created by Administrator on 2017/2/17.
*/
public class RedisTest {
public static void main(String[] args) {
ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/spring-redisSentine.xml");
RedisUtil redisUtil = (RedisUtil) ac.getBean("redisUtil");
String ss = redisUtil.get("user.uid.1");
System.out.printf(ss);
}
}
RedisUtil.java
package com.dupang.redis;
import org.springframework.data.redis.core.StringRedisTemplate;
import java.util.concurrent.TimeUnit;
public class RedisUtil {
private StringRedisTemplate redisTemplate;
public RedisUtil(StringRedisTemplate redisTemplate) {
this.redisTemplate = redisTemplate;
}
public Boolean add(String key,String value){
Boolean rt=Boolean.FALSE;
rt=redisTemplate.boundValueOps(key).setIfAbsent(value);
if(rt) {
redisTemplate.expire(key, 30L, TimeUnit.MINUTES);
}
return rt;
}
public Boolean add(String key,String value,long expire,TimeUnit timeUnit){
Boolean rt=Boolean.FALSE;
rt=redisTemplate.boundValueOps(key).setIfAbsent(value);
if(rt) {
redisTemplate.expire(key, expire, timeUnit);
}
return rt;
}
public String get(String key){
return redisTemplate.boundValueOps(key).get();
}
public void delete(String key){
redisTemplate.delete(key);
}
public String getAndRemove(String key){
String rt=redisTemplate.boundValueOps(key).get();
redisTemplate.delete(key);
return rt;
}
public Boolean hasKey(String key){
return redisTemplate.hasKey(key);
}
}
spring-redisSentine.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:redis="http://www.springframework.org/schema/redis"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/cache
http://www.springframework.org/schema/cache/spring-cache-3.1.xsd
http://www.springframework.org/schema/redis
http://www.springframework.org/schema/redis/spring-redis-1.0.xsd">
<context:property-placeholder location="classpath:app.properties" />
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<!-- 最大空闲连接数 -->
<property name="maxIdle" value="${redis.adapter.maxIdle}" />
<!-- 最小空闲连接数 -->
<property name="minIdle" value="${redis.adapter.minIdle}" />
<!-- 在获取连接的时候检查有效性 -->
<property name="testOnBorrow" value="${redis.adapter.testOnBorrow}" />
<!-- return 一个jedis实例给pool时，是否检查连接可用性 （ping()） -->
<property name="testOnReturn" value="${redis.adapter.testOnReturn}" />
<!-- idle状态监测用异步线程evict进行检查， -->
<property name="testWhileIdle" value="${redis.adapter.testWhileIdle}" />
<!-- 一次最多evict的pool里的jedis实例个数 -->
<property name="numTestsPerEvictionRun" value="${redis.adapter.numTestsPerEvictionRun}" />
<!-- test idle 线程的时间间隔 -->
<property name="timeBetweenEvictionRunsMillis" value="${redis.adapter.timeBetweenEvictionRunsMillis}" />
</bean> <bean id="sentinelConfig"
class="org.springframework.data.redis.connection.RedisSentinelConfiguration">
<!-- master名称 sentinel.conf里面配置的主节点名称 -->
<constructor-arg name="master" value="${redis.adapter.masterName}" />
<!-- sentinel的ip和端口列表 -->
<constructor-arg name="sentinelHostAndPorts">
<set>
<value>${redis.adapter.sentinel1}</value>
<value>${redis.adapter.sentinel2}</value>
<value>${redis.adapter.sentinel3}</value>
</set>
</constructor-arg>
</bean> <bean id="jedisConnectionFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
<constructor-arg ref="sentinelConfig" />
<constructor-arg ref="jedisPoolConfig" />
</bean> <bean id="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer"/> <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory" />
</bean> <bean id="redisUtil" class="com.dupang.redis.RedisUtil">
<constructor-arg name="redisTemplate" ref="redisTemplate"/>
</bean> </beans>
app.properties
#redis
redis.adapter.maxIdle=
redis.adapter.minIdle=
redis.adapter.testOnBorrow=true
redis.adapter.testOnReturn=true
redis.adapter.testWhileIdle=true
redis.adapter.numTestsPerEvictionRun=
redis.adapter.timeBetweenEvictionRunsMillis=
redis.adapter.masterName=mymaster
redis.adapter.sentinel1=127.0.0.1:
redis.adapter.sentinel2=127.0.0.1:
redis.adapter.sentinel3=127.0.0.1:
遇到的问题
在运行测试类时报错，内容如下
/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/bin/java -Didea.launcher.port=7533 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA.app/Contents/bin" -Dfile.encoding=UTF-8 -classpath "/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/lib/tools.jar:/Users/duguanxin/IdeaProjects/redistestwithspring/target/classes:/Users/duguanxin/.m2/repository/org/springframework/spring-context/4.3.6.RELEASE/spring-context-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-aop/4.3.6.RELEASE/spring-aop-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-beans/4.3.6.RELEASE/spring-beans-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-core/4.3.6.RELEASE/spring-core-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/commons-logging/commons-logging/1.2/commons-logging-1.2.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-expression/4.3.6.RELEASE/spring-expression-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-context-support/4.3.6.RELEASE/spring-context-support-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-tx/4.3.6.RELEASE/spring-tx-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-web/4.3.6.RELEASE/spring-web-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/junit/junit/4.12/junit-4.12.jar:/Users/duguanxin/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-test/4.3.6.RELEASE/spring-test-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/data/spring-data-redis/1.8.0.RELEASE/spring-data-redis-1.8.0.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/data/spring-data-keyvalue/1.2.0.RELEASE/spring-data-keyvalue-1.2.0.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/data/spring-data-commons/1.13.0.RELEASE/spring-data-commons-1.13.0.RELEASE.jar:/Users/duguanxin/.m2/repository/org/springframework/spring-oxm/4.3.6.RELEASE/spring-oxm-4.3.6.RELEASE.jar:/Users/duguanxin/.m2/repository/org/slf4j/slf4j-api/1.7.22/slf4j-api-1.7.22.jar:/Users/duguanxin/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.22/jcl-over-slf4j-1.7.22.jar:/Users/duguanxin/.m2/repository/redis/clients/jedis/2.9.0/jedis-2.9.0.jar:/Users/duguanxin/.m2/repository/org/apache/commons/commons-pool2/2.4.2/commons-pool2-2.4.2.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar" com.intellij.rt.execution.application.AppMain com.dupang.redis.RedisTest
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
二月 19, 2017 10:34:30 上午 redis.clients.jedis.JedisSentinelPool initSentinels
信息: Trying to find master from available Sentinels...
二月 19, 2017 10:34:35 上午 redis.clients.jedis.JedisSentinelPool initSentinels
警告: Cannot get master address from sentinel running @ 192.168.2.101:26379. Reason: redis.clients.jedis.exceptions.JedisDataException: DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.. Trying next one.
二月 19, 2017 10:34:35 上午 redis.clients.jedis.JedisSentinelPool initSentinels
警告: Cannot get master address from sentinel running @ 192.168.2.101:26389. Reason: redis.clients.jedis.exceptions.JedisDataException: DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.. Trying next one.
二月 19, 2017 10:34:35 上午 redis.clients.jedis.JedisSentinelPool initSentinels
警告: Cannot get master address from sentinel running @ 192.168.2.101:26399. Reason: redis.clients.jedis.exceptions.JedisDataException: DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.. Trying next one.
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jedisConnectionFactory' defined in class path resource [spring-redisSentine.xml]: Invocation of init method failed; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at com.dupang.redis.RedisTest.main(RedisTest.java:11)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...
at redis.clients.jedis.JedisSentinelPool.initSentinels(JedisSentinelPool.java:180)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:95)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:76)
at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.createRedisSentinelPool(JedisConnectionFactory.java:263)
at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.createPool(JedisConnectionFactory.java:248)
at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.afterPropertiesSet(JedisConnectionFactory.java:237)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
... 17 more Process finished with exit code 1
居然报所有哨兵都down掉的错误，而我确认所有这些哨兵都正常着，百度看看，说是防火墙的问题。但是我的防火墙就没开，看来也不是这个问题。后来发现了上面打印的警告信息。
Cannot get master address from sentinel running @ 192.168.2.101:26399. Reason: redis.clients.jedis.exceptions.JedisDataException: DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.. Trying next one
这是因为哨兵的配置文件里的保护模式启动了。所以又因为没有绑定可以访问的ip和设置访问密码，就不允许从外部访问。
我们的哨兵明明是127的地址，应该访问127.0.0.1:26379才对啊，这是因为redis内部把127的地址转换成了192.168.2.101了，也就是你的本机的ip地址。所以访问192的地址就相当于从外部访问你的哨兵。
根据它的1，2，3，4的提示，你只要满足其中一个就行。于是我就把三个哨兵的sentinel.conf配置文件中的保护模式改为禁用就行了
# *** IMPORTANT ***
#
# By default Sentinel will not be reachable from interfaces different than
# localhost, either use the 'bind' directive to bind to a list of network
# interfaces, or disable protected mode with "protected-mode no" by
# adding it to this configuration file.
#
# Before doing that MAKE SURE the instance is protected from the outside
# world via firewalling or other means.
#
# For example you may use one of the following:
#
# bind 127.0.0.1 192.168.1.1
#
protected-mode no
这样再访问就ok了。
插播个广告
老丈人家的粉皮儿，农产品，没有乱七八糟的添加剂，欢迎惠顾
spring-data-redis,jedis和redis主从集成和遇到的问题的更多相关文章
- Spring Data JPA系列2：SpringBoot集成JPA详细教程，快速在项目中熟练使用JPA
大家好,又见面了. 这是Spring Data JPA系列的第2篇,在上一篇<Spring Data JPA系列1:JDBC.ORM.JPA.Spring Data JPA,傻傻分不清楚?给你个 ...
- Redis-07.Spring Data整合Jedis
Spring整合Jedis 1.单实例(想节约时间的请直接拖到下面跳过1.2部分) step1:毫无疑问,首先需要在pom.xml中配置Jedis依赖 <dependency> <g ...
- 征服 Redis + Jedis + Spring （一）—— 配置&常规操作（GET SET DEL）
有日子没写博客了,真的是忙得要疯掉. 完成项目基础架构搭建工作,解决了核心技术问题,接着需要快速的调研下基于Spring框架下的Redis操作. 相关链接: 征服 Redis 征服 Redis + J ...
- 征服 Redis + Jedis + Spring （三）—— 列表操作【转】
一开始以为Spring下操作哈希表,列表,真就是那么土.恍惚间发现“stringRedisTemplate.opsForList()”的强大,抓紧时间恶补下. 相关链接: 征服 Redis 征服 Re ...
- 使用Spring Data Redis时，遇到的几个问题
需求: 1,保存一个key-value形式的结构到redis 2,把一个对象保存成hash形式的结构到redis 代码如下: // 保存key-value值 pushFrequency ...
- springboot(七).springboot整合jedis实现redis缓存
我们在使用springboot搭建微服务的时候,在很多时候还是需要redis的高速缓存来缓存一些数据,存储一些高频率访问的数据,如果直接使用redis的话又比较麻烦,在这里,我们使用jedis来实现r ...
- Java 使用Jedis连接Redis数据库（-）
redis 安装: Linux 安装redis 1)下载jar包: 使用Jedis需要以下两个jar包: jedis-2.8.0.jar commons-pool2-2.4.2.jar 2)测试red ...
- 【ORM框架】Spring Data JPA（一）-- 入门
本文参考:spring Data JPA入门 [原创]纯干货,Spring-data-jpa详解,全方位介绍 Spring Data JPA系列教程--入门 一.Spring Data JPA介 ...
- Spring Data JPA系列3：JPA项目中核心场景与进阶用法介绍
大家好,又见面了. 到这里呢,已经是本SpringData JPA系列文档的第三篇了,先来回顾下前面两篇: 在第1篇<Spring Data JPA系列1:JDBC.ORM.JPA.Spring ...
- Spring Data JPA系列4——Spring声明式数事务处理与多数据源支持
大家好,又见面了. 到这里呢,已经是本SpringData JPA系列文档的第四篇了,先来回顾下前面三篇: 在第1篇<Spring Data JPA系列1:JDBC.ORM.JPA.Spring ...
随机推荐
- 【CS231N】2、多类SVM
一.疑问 1. assignments1 linear_svm.py文件的函数 svm_loss_naive中,使用循环的方式实现梯度计算 linear_svm.py文件的函数 svm_loss_ve ...
- eg_7
1. 给定Map,根据Map中的值从大到小排列 package com.studentmanager.www; import java.util.ArrayList; import java.util ...
- JAVA学习IO(1)
面向过程和面向对象的区别:面向过程:把问题分析成一个一个步骤组成的过程面向对象:从一个问题中分析出各个功能对象,并描述各个功能在整个解决问题的步骤的行为.面向对象的3大特征:封装,继承,多态封装:把多 ...
- Linux上两种网络连接方式
模式一:NAT方式好处:路由器更换,或者交换机更换,网络仍然可以使用,所用使用最多 准备工作: 查看VMware服务器启动情况,五个全开模式 vmnet8开启模式 1 配置VMware交换机的ip地址 ...
- [转贴]systemd 编写服务管理脚本
[转贴]sparkdev大神的博客, 关于 systemd的配置文件的 介绍, 自己之前二进制安装 k8s 时 超过一个 service文件 但是当时不明不白的. 现在再学习一下大神的文章 的确牛B ...
- isset与empty 的区别
isset()与empty()函数的区别,isset()只需要验证一个值是否存在: 而empty()不但需验证这个值是否存在,还需检验它的值是否非空和非0: 注:isset()只检验一个变量是否已经设 ...
- maven依赖jar包时版本冲突的解决
https://blog.csdn.net/sinat_39789638/article/details/78005945 共有四种解决方式: 1.第一声明优先原则: 在pom.xml配置文件中,如果 ...
- BZOJ3270 博物馆（高斯消元+概率期望）
将两个人各自所在点视为状态,新建一个图.到达某个终点的概率等于其期望次数.那么高斯消元即可. #include<iostream> #include<cstdio> #incl ...
- Jackson 使用
// 序列化出来的 JSON, 不包含值为 NULL 类型字段. mapper.setSerializationInclusion(Include.NON_NULL); Jackson provide ...
- 一些$LCT$的瓜皮题目
一些瓜皮 放几个比较优(she)秀(pi)的\(LCT\)题. 老惯例,每一题代码因为一些未知原因消失了(如果要的话私我好了,虽然会咕咕咕). 嘴巴\(AC\)真香! [SP16580] QTREE7 ...