一步步完成Maven+Spring+Dubbo+Zookeeper的整合示例

本文给出一个整合Maven Spring Dubbo Zookeeper的示例，并且一步步给出完成步骤，并对其中可能遇到的问题进行解决。

一、Maven模块化

创建一个名为dubbo-demo的Maven工程，该工程包含三个模块

• dubbo-demo-interface （定义对外开放接口）
• dubbo-demo-provider （接口实现）
• dubbo-demo-consumer （接口调用）

dubbo-demo工程中的pom.xml文件如下：

代码语言：javascript复制

<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>4.0.0</modelVersion>
  <groupId>com.xxx.dubbo.demo</groupId>
  <artifactId>dubbo-demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
  <modules>
    <module>dubbo-demo-provider</module>
    <module>dubbo-demo-consumer</module>
    <module>dubbo-demo-interface</module>
  </modules>
</project>

接下来，我们就一步一步来完成interface、provider以及consumer模块的内容。

二、模块interface

2.1 定义接口

创建一个接口（GreetingService），包含一个hello接口，如：

代码语言：javascript复制

package com.xxx.dubbo.demo.service;

/**
 * @author wangmengjun
 *
 */
public interface GreetingService {

  String hello(String name);
}

简单的接口就定义好了。

有了接口，就可以在Provider中完成接口的实现，并暴露接口服务为Dubbo服务给其它模块使用（如consumer）。

三、模块Provider

3.1 添加依赖包

• 添加interface依赖包

代码语言：javascript复制

    <dependency>
      <groupId>com.xxx.dubbo.demo</groupId>
      <artifactId>dubbo-demo-interface</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>

• 添加spring依赖包

代码语言：javascript复制

<!--引入Spring依赖包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.framework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.framework.version}</version>
    </dependency>

• 添加dubbo依赖包

代码语言：javascript复制

  <!-- Dubbo相关 -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>dubbo</artifactId>
      <version>2.5.4-snapshot</version>
      <exclusions>
        <exclusion>
          <groupId>org.springframework</groupId>
          <artifactId>spring</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.javassist</groupId>
      <artifactId>javassist</artifactId>
      <version>3.18.1-GA</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/io.netty/netty -->
    <dependency>
      <groupId>io.netty</groupId>
      <artifactId>netty</artifactId>
      <version>3.10.6.Final</version>
    </dependency>

• 添加zk-client依赖包

代码语言：javascript复制

    <!-- ZK-client -->
    <dependency>
      <groupId>com.github.sgroschupf</groupId>
      <artifactId>zkclient</artifactId>
      <version>0.1</version>
    </dependency>

dubbo-demo-provider模块详细的pom.xml文件如下：

代码语言：javascript复制

<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>4.0.0</modelVersion>
  <parent>
    <groupId>com.xxx.dubbo.demo</groupId>
    <artifactId>dubbo-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>dubbo-demo-provider</artifactId>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <spring.framework.version>4.3.6.RELEASE</spring.framework.version>
  </properties>

  <dependencies>

    <dependency>
      <groupId>com.xxx.dubbo.demo</groupId>
      <artifactId>dubbo-demo-interface</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>

    <!--引入Spring依赖包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.framework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.framework.version}</version>
    </dependency>

    <!-- Dubbo -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>dubbo</artifactId>
      <version>2.5.4-snapshot</version>
      <exclusions>
        <exclusion>
          <groupId>org.springframework</groupId>
          <artifactId>spring</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.javassist</groupId>
      <artifactId>javassist</artifactId>
      <version>3.18.1-GA</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/io.netty/netty -->
    <dependency>
      <groupId>io.netty</groupId>
      <artifactId>netty</artifactId>
      <version>3.10.6.Final</version>
    </dependency>

    <!-- ZK-client -->
    <dependency>
      <groupId>com.github.sgroschupf</groupId>
      <artifactId>zkclient</artifactId>
      <version>0.1</version>
    </dependency>
  </dependencies>

</project>

3.2 实现接口

编写GreetingService的实现类GreetingServiceImpl, 并实现hello方法

代码语言：javascript复制

package com.xxx.dubbo.demo.service.impl;

import java.util.Date;

import com.xxx.dubbo.demo.service.GreetingService;

/**
 * @author wangmengjun
 *
 */
public class GreetingServiceImpl implements GreetingService {

  public String hello(String name) {
    System.out.println("Hello Service is calling : "   new Date());
    String greetMessage = "Hello, "   name;
    return greetMessage;
  }

}

3.3 配置XML文件

• spring-dubbo-provider.xml

代码语言：javascript复制

<?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:dubbo="http://code.alibabatech.com/schema/dubbo"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://code.alibabatech.com/schema/dubbo
    http://code.alibabatech.com/schema/dubbo/dubbo.xsd
    ">

  <description>Dubbo Demo Service</description>
  <!-- 提供方应用信息，用于计算依赖关系 -->
  <dubbo:application name="dubbo-demo-provider" />

  <!-- 使用zookeeper注册中心暴露服务地址 -->
  <dubbo:registry protocol="zookeeper" address="127.0.0.1:2181"
    client="zkclient" />

  <!-- dubbo缓存 -->
  <dubbo:protocol id="dubbo" name="dubbo" port="20880"
    threadpool="cached" threads="100" />

  <!-- Greeting服务 -->
  <bean id="greetingService" class="com.xxx.dubbo.demo.service.impl.GreetingServiceImpl" />

  <dubbo:service protocol="dubbo"
    interface="com.xxx.dubbo.demo.service.GreetingService" ref="greetingService" />
</beans>

• applicationContext.xml

代码语言：javascript复制

<?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"
  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
        ">
  <!--服务层配置 -->
  <import resource="classpath:spring-dubbo-provider.xml" />
</beans>

3.4 编写启动类

编写一个启动类Main

代码语言：javascript复制

package com.xxx.dubbo.demo.main;

import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

  @SuppressWarnings("resource")
  public static void main(String[] args) throws IOException {
    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
        "applicationContext.xml");
    context.start();
    System.in.read(); 
  }
}

其中，

System.in.read(); 的作用是控制台输入任何字符退出~ 因为本文示例provider不是web工程，这个操作只是保持provider的服务一直开着~

接下来，我们继续来完成模块Consumer的代码和配置。

四、模块Consumer

4.1 添加依赖包

• 添加interface依赖包

代码语言：javascript复制

    <dependency>
      <groupId>com.xxx.dubbo.demo</groupId>
      <artifactId>dubbo-demo-interface</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>

• 添加spring依赖包

代码语言：javascript复制

<!--引入Spring依赖包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.framework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.framework.version}</version>
    </dependency>

• 添加dubbo依赖包

代码语言：javascript复制

        <!-- Dubbo相关 -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>dubbo</artifactId>
      <version>2.5.4-snapshot</version>
      <exclusions>
        <exclusion>
          <groupId>org.springframework</groupId>
          <artifactId>spring</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.javassist</groupId>
      <artifactId>javassist</artifactId>
      <version>3.18.1-GA</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/io.netty/netty -->
    <dependency>
      <groupId>io.netty</groupId>
      <artifactId>netty</artifactId>
      <version>3.10.6.Final</version>
    </dependency>

• 添加zk-client依赖包

代码语言：javascript复制

    <!-- ZK-client -->
    <dependency>
      <groupId>com.github.sgroschupf</groupId>
      <artifactId>zkclient</artifactId>
      <version>0.1</version>
    </dependency>

dubbo-demo-consumer模块详细的pom.xml文件如下：

代码语言：javascript复制

<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>4.0.0</modelVersion>
  <parent>
    <groupId>com.xxx.dubbo.demo</groupId>
    <artifactId>dubbo-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>dubbo-demo-consumer</artifactId>
  
   <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <spring.framework.version>4.3.6.RELEASE</spring.framework.version>
  </properties>

  <dependencies>

    <dependency>
      <groupId>com.xxx.dubbo.demo</groupId>
      <artifactId>dubbo-demo-interface</artifactId>
      <version>0.0.1-SNAPSHOT</version>
    </dependency>

    <!--引入Spring依赖包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.framework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.framework.version}</version>
    </dependency>

    <!-- Dubbo -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>dubbo</artifactId>
      <version>2.5.4-snapshot</version>
      <exclusions>
        <exclusion>
          <groupId>org.springframework</groupId>
          <artifactId>spring</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.javassist</groupId>
      <artifactId>javassist</artifactId>
      <version>3.18.1-GA</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/io.netty/netty -->
    <dependency>
      <groupId>io.netty</groupId>
      <artifactId>netty</artifactId>
      <version>3.10.6.Final</version>
    </dependency>
    
    <!-- ZK-client -->
    <dependency>
      <groupId>com.github.sgroschupf</groupId>
      <artifactId>zkclient</artifactId>
      <version>0.1</version>
    </dependency>

  </dependencies>
  
</project>

4.2 配置XML文件

• spring-dubbo-consume.xml

代码语言：javascript复制

<?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:dubbo="http://code.alibabatech.com/schema/dubbo"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://code.alibabatech.com/schema/dubbo
    http://code.alibabatech.com/schema/dubbo/dubbo.xsd
    ">

  <description>Dubbo Demo Service</description>
  <!-- 提供方应用信息，用于计算依赖关系 -->
  <dubbo:application name="DemoProvider" />


  <!-- 使用zookeeper注册中心暴露服务地址 -->
  <dubbo:registry protocol="zookeeper" address="172.0.0.1:2181"
    client="zkclient" />

  <!-- dubbo缓存 -->
  <dubbo:protocol id="dubbo" name="dubbo" port="20880"
    threadpool="cached" threads="100" />

  <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
  <dubbo:reference id="greetingService"
    interface="com.xxx.dubbo.demo.service.GreetingService" />

    
</beans>

• applicationContext.xml

代码语言：javascript复制

<?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"
  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
        ">
  <!--服务层配置 -->
  <import resource="classpath:spring-dubbo-consumer.xml" />
</beans>

4.3 编写测试类

在dubbo-demo-consumer模块下，创建一个调用interface接口的方法。

代码语言：javascript复制

package com.xxx.dubbo.demo.main;

import java.io.IOException;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.xxx.dubbo.demo.service.GreetingService;

public class Main {

  @SuppressWarnings("resource")
  public static void main(String[] args) throws IOException {
    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    context.start();
    GreetingService greetingService = (GreetingService) context.getBean("greetingService");
    String greetMessage = greetingService.hello("Eric");
    System.out.println("Consumer ==> "   greetMessage);
    context.destroy();
  }
}

五、Zookeeper安装和配置

5.1 安装

可以从zookeeper官网下载zookeeper安装包~ 本文使用的版本是3.4.6， 将下载的安装包解压缩即可。

5.2 配置

进入Zookeeper安装目录下的conf目录。

复制zoo_sample.conf文件，并将复制的配置文件取名为zoo.conf。其内容如下：

代码语言：javascript复制

# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=/tmp/zookeeper
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1

简单使用的话，可以不做修改。

至此，interface，provider以及consumer模块已经准备好，zookeeper也已经准备好~ 接下来就可以做相关的测试了~

六、测试 & 结果

6.1 启动Zookeeper

进入Zookeeper安装路径下的bin目录。

window系统中，启动zkServer.cmd，Linux中，启动zkServer.sh~

启动zookeeper服务，

6.2 启动提供者

运行dubbo-demo-provider模块中的Main类。

• 运行之后，出现如下问题：

代码语言：javascript复制

log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.

• 根据描述 ，解决方法很简单，配置一个log4j.properties文件在resouce下即可

log4j.properties的内容简单如下：

代码语言：javascript复制

# Rules reminder:
# DEBUG < INFO < WARN < ERROR < FATAL

# Global logging configuration
log4j.rootLogger=INFO,stdout

## Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%-5p][%d{yyyy-MM-dd HH:mm:ss,SSS}] %l - %m%n

重新运行Main类，可以看出来，provider已经成功启动。

代码语言：javascript复制

[INFO ][2017-05-18 21:06:13,577] org.springframework.context.support.AbstractApplicationContext.prepareRefresh(AbstractApplicationContext.java:582) - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@46309a10: startup date [Thu May 18 21:06:13 CST 2017]; root of context hierarchy
[INFO ][2017-05-18 21:06:13,626] org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:317) - Loading XML bean definitions from class path resource [applicationContext.xml]
[INFO ][2017-05-18 21:06:13,717] org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:317) - Loading XML bean definitions from class path resource [spring-dubbo-provider.xml]
[INFO ][2017-05-18 21:06:13,779]  - using logger: com.alibaba.dubbo.common.logger.log4j.Log4jLoggerAdapter
[INFO ][2017-05-18 21:06:14,097] com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:107) -  [DUBBO] The service ready on spring started. service: com.xxx.dubbo.demo.service.GreetingService, dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1
[INFO ][2017-05-18 21:06:14,213] com.alibaba.dubbo.config.ServiceConfig.exportLocal(ServiceConfig.java:513) -  [DUBBO] Export dubbo service com.xxx.dubbo.demo.service.GreetingService to local registry, dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1
[INFO ][2017-05-18 21:06:14,213] com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:473) -  [DUBBO] Export dubbo service com.xxx.dubbo.demo.service.GreetingService to url dubbo://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=dubbo-demo-provider&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=18448&side=provider&threadpool=cached&threads=100&timestamp=1495112774127, dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1
[INFO ][2017-05-18 21:06:14,214] com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:484) -  [DUBBO] Register dubbo service com.xxx.dubbo.demo.service.GreetingService url dubbo://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=dubbo-demo-provider&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=18448&side=provider&threadpool=cached&threads=100&timestamp=1495112774127 to registry registry://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=dubbo-demo-provider&client=zkclient&dubbo=2.5.4-SNAPSHOT&pid=18448&registry=zookeeper&timestamp=1495112774106, dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1
[INFO ][2017-05-18 21:06:14,397] com.alibaba.dubbo.remoting.transport.AbstractServer.<init>(AbstractServer.java:69) -  [DUBBO] Start NettyServer bind /0.0.0.0:20880, export /192.168.102.51:20880, dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1
[INFO ][2017-05-18 21:06:14,434] org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:64) - Starting ZkClient event thread.
[INFO ][2017-05-18 21:06:14,443] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:zookeeper.version=3.3.3-1073969, built on 02/23/2011 22:27 GMT
[INFO ][2017-05-18 21:06:14,443] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:host.name=wangmengjun-PC
[INFO ][2017-05-18 21:06:14,443] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.version=1.7.0_79
[INFO ][2017-05-18 21:06:14,443] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.vendor=Oracle Corporation
[INFO ][2017-05-18 21:06:14,444] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.home=C:Program FilesJavajre7
[INFO ][2017-05-18 21:06:14,444] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.class.path=F:JavaDeveloperworkspacesSpringMVCDubboExampledubbo-demodubbo-demo-providertargetclasses;F:JavaDeveloperworkspacesSpringMVCDubboExampledubbo-demodubbo-demo-interfacetargetclasses;D:java_toolsReponsitoriesMavenorgspringframeworkspring-core4.3.6.RELEASEspring-core-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavencommons-loggingcommons-logging1.2commons-logging-1.2.jar;D:java_toolsReponsitoriesMavenorgspringframeworkspring-context4.3.6.RELEASEspring-context-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavenorgspringframeworkspring-aop4.3.6.RELEASEspring-aop-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavenorgspringframeworkspring-beans4.3.6.RELEASEspring-beans-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavenorgspringframeworkspring-expression4.3.6.RELEASEspring-expression-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavencomalibabadubbo2.5.4-snapshotdubbo-2.5.4-snapshot.jar;D:java_toolsReponsitoriesMavenorgjavassistjavassist3.18.1-GAjavassist-3.18.1-GA.jar;D:java_toolsReponsitoriesMavenionettynetty3.10.6.Finalnetty-3.10.6.Final.jar;D:java_toolsReponsitoriesMavencomgithubsgroschupfzkclient.1zkclient-0.1.jar;D:java_toolsReponsitoriesMavenorgapachezookeeperzookeeper3.3.3zookeeper-3.3.3.jar;D:java_toolsReponsitoriesMavenjlinejline.9.94jline-0.9.94.jar;D:java_toolsReponsitoriesMavenjunitjunit3.8.1junit-3.8.1.jar;D:java_toolsReponsitoriesMavenlog4jlog4j1.2.14log4j-1.2.14.jar
[INFO ][2017-05-18 21:06:14,444] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.library.path=C:Program FilesJavajre7bin;C:WINDOWSSunJavabin;C:WINDOWSsystem32;C:WINDOWS;C:Program Files (x86)InteliCLS Client;C:Program FilesInteliCLS Client;C:Program Files (x86)NVIDIA CorporationPhysXCommon;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:WINDOWSSystem32WindowsPowerShellv1.0;C:Program FilesIntelIntel(R) Management Engine ComponentsDAL;C:Program FilesIntelIntel(R) Management Engine ComponentsIPT;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsDAL;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsIPT;C:Program Files (x86)Common Fileslenovoeasyplussdkbin;.;C:Program FilesJavajdk1.7.0_79bin;D:developapache-jmeter-2.13bin;C:Program FilesTortoiseSVNbin;D:developDatabasesMysqlmysql-5.6.20bin;D:developSonarsonar-runner-2.4bin;D:developSonarsonarqube-5.1.1bin;D:developpythonpython-2.7.10python.exe;C:Program FilesTortoiseGitbin;D:developZeroCZeroCIce-3.6.2bin;D:developapache-maven-3.3.3bin;D:developSonarsonar-scanner-2.8bin;F:JavaDeveloperSQLmysql-5.7.17-winx64bin;F:JavaDeveloperNodejsnodejs7;C:UserswangmengjunAppDataLocalProgramsPythonPython36Scripts;C:UserswangmengjunAppDataLocalProgramsPythonPython36;C:UserswangmengjunAppDataLocalProgramsPythonPython35Scripts;C:UserswangmengjunAppDataLocalProgramsPythonPython35;C:Program Files (x86)OpenV**bin;C:UserswangmengjunAppDataLocalMicrosoftWindowsApps;C:UserswangmengjunAppDataRoamingnpm;.
[INFO ][2017-05-18 21:06:14,444] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.io.tmpdir=C:UsersWANGME~1AppDataLocalTemp
[INFO ][2017-05-18 21:06:14,444] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.compiler=<NA>
[INFO ][2017-05-18 21:06:14,444] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:os.name=Windows 8.1
[INFO ][2017-05-18 21:06:14,445] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:os.arch=amd64
[INFO ][2017-05-18 21:06:14,445] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:os.version=6.3
[INFO ][2017-05-18 21:06:14,445] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:user.name=wangmengjun
[INFO ][2017-05-18 21:06:14,445] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:user.home=C:Userswangmengjun
[INFO ][2017-05-18 21:06:14,445] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:user.dir=F:JavaDeveloperworkspacesSpringMVCDubboExampledubbo-demodubbo-demo-provider
[INFO ][2017-05-18 21:06:14,446] org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:373) - Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=30000 watcher=org.I0Itec.zkclient.ZkClient@7251c1ad
[INFO ][2017-05-18 21:06:14,454] org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:1041) - Opening socket connection to server /127.0.0.1:2181
[INFO ][2017-05-18 21:06:14,456] org.apache.zookeeper.ClientCnxn$SendThread.primeConnection(ClientCnxn.java:949) - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
[INFO ][2017-05-18 21:06:14,608] org.apache.zookeeper.ClientCnxn$SendThread.readConnectResult(ClientCnxn.java:738) - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x15c1ba12c860000, negotiated timeout = 30000
[INFO ][2017-05-18 21:06:14,610] org.I0Itec.zkclient.ZkClient.processStateChanged(ZkClient.java:449) - zookeeper state changed (SyncConnected)
[INFO ][2017-05-18 21:06:14,611] com.alibaba.dubbo.registry.support.AbstractRegistry.register(AbstractRegistry.java:302) -  [DUBBO] Register: dubbo://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=dubbo-demo-provider&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=18448&side=provider&threadpool=cached&threads=100&timestamp=1495112774127, dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1
[INFO ][2017-05-18 21:06:14,699] com.alibaba.dubbo.registry.support.AbstractRegistry.subscribe(AbstractRegistry.java:325) -  [DUBBO] Subscribe: provider://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=dubbo-demo-provider&category=configurators&check=false&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=18448&side=provider&threadpool=cached&threads=100&timestamp=1495112774127, dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1
[INFO ][2017-05-18 21:06:14,758] com.alibaba.dubbo.registry.support.AbstractRegistry.notify(AbstractRegistry.java:422) -  [DUBBO] Notify urls for subscribe url provider://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=dubbo-demo-provider&category=configurators&check=false&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=18448&side=provider&threadpool=cached&threads=100&timestamp=1495112774127, urls: [empty://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=dubbo-demo-provider&category=configurators&check=false&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=18448&side=provider&threadpool=cached&threads=100&timestamp=1495112774127], dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1

6.3 消费者调用

接下来，最后一个步骤就是在dubbo-demo-consumer中，调用Dubbo服务即可。

运行中的Main类，结果如下：

代码语言：javascript复制

[INFO ][2017-05-18 21:08:45,916] org.springframework.context.support.AbstractApplicationContext.prepareRefresh(AbstractApplicationContext.java:582) - Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@6ff58334: startup date [Thu May 18 21:08:45 CST 2017]; root of context hierarchy
[INFO ][2017-05-18 21:08:45,966] org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:317) - Loading XML bean definitions from class path resource [applicationContext.xml]
[INFO ][2017-05-18 21:08:46,059] org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:317) - Loading XML bean definitions from class path resource [spring-dubbo-consumer.xml]
[INFO ][2017-05-18 21:08:46,118]  - using logger: com.alibaba.dubbo.common.logger.log4j.Log4jLoggerAdapter
[INFO ][2017-05-18 21:08:46,533] com.alibaba.dubbo.registry.support.AbstractRegistry.loadProperties(AbstractRegistry.java:232) -  [DUBBO] Load registry store file C:Userswangmengjun.dubbodubbo-registry-127.0.0.1.cache, data: {com.xxx.dubbo.demo.service.GreetingService=empty://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=dubbo-demo-provider&category=configurators&check=false&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=18448&side=provider&threadpool=cached&threads=100&timestamp=1495112774127}, dubbo version: 2.5.4-SNAPSHOT, current host: 127.0.0.1
[INFO ][2017-05-18 21:08:46,545] org.I0Itec.zkclient.ZkEventThread.run(ZkEventThread.java:64) - Starting ZkClient event thread.
[INFO ][2017-05-18 21:08:46,554] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:zookeeper.version=3.3.3-1073969, built on 02/23/2011 22:27 GMT
[INFO ][2017-05-18 21:08:46,554] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:host.name=wangmengjun-PC
[INFO ][2017-05-18 21:08:46,554] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.version=1.7.0_79
[INFO ][2017-05-18 21:08:46,554] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.vendor=Oracle Corporation
[INFO ][2017-05-18 21:08:46,554] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.home=C:Program FilesJavajre7
[INFO ][2017-05-18 21:08:46,555] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.class.path=F:JavaDeveloperworkspacesSpringMVCDubboExampledubbo-demodubbo-demo-consumertargetclasses;F:JavaDeveloperworkspacesSpringMVCDubboExampledubbo-demodubbo-demo-interfacetargetclasses;D:java_toolsReponsitoriesMavenorgspringframeworkspring-core4.3.6.RELEASEspring-core-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavencommons-loggingcommons-logging1.2commons-logging-1.2.jar;D:java_toolsReponsitoriesMavenorgspringframeworkspring-context4.3.6.RELEASEspring-context-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavenorgspringframeworkspring-aop4.3.6.RELEASEspring-aop-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavenorgspringframeworkspring-beans4.3.6.RELEASEspring-beans-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavenorgspringframeworkspring-expression4.3.6.RELEASEspring-expression-4.3.6.RELEASE.jar;D:java_toolsReponsitoriesMavencomalibabadubbo2.5.4-snapshotdubbo-2.5.4-snapshot.jar;D:java_toolsReponsitoriesMavenorgjavassistjavassist3.18.1-GAjavassist-3.18.1-GA.jar;D:java_toolsReponsitoriesMavenionettynetty3.10.6.Finalnetty-3.10.6.Final.jar;D:java_toolsReponsitoriesMavencomgithubsgroschupfzkclient.1zkclient-0.1.jar;D:java_toolsReponsitoriesMavenorgapachezookeeperzookeeper3.3.3zookeeper-3.3.3.jar;D:java_toolsReponsitoriesMavenjlinejline.9.94jline-0.9.94.jar;D:java_toolsReponsitoriesMavenjunitjunit3.8.1junit-3.8.1.jar;D:java_toolsReponsitoriesMavenlog4jlog4j1.2.14log4j-1.2.14.jar
[INFO ][2017-05-18 21:08:46,555] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.library.path=C:Program FilesJavajre7bin;C:WINDOWSSunJavabin;C:WINDOWSsystem32;C:WINDOWS;C:Program Files (x86)InteliCLS Client;C:Program FilesInteliCLS Client;C:Program Files (x86)NVIDIA CorporationPhysXCommon;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:WINDOWSSystem32WindowsPowerShellv1.0;C:Program FilesIntelIntel(R) Management Engine ComponentsDAL;C:Program FilesIntelIntel(R) Management Engine ComponentsIPT;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsDAL;C:Program Files (x86)IntelIntel(R) Management Engine ComponentsIPT;C:Program Files (x86)Common Fileslenovoeasyplussdkbin;.;C:Program FilesJavajdk1.7.0_79bin;D:developapache-jmeter-2.13bin;C:Program FilesTortoiseSVNbin;D:developDatabasesMysqlmysql-5.6.20bin;D:developSonarsonar-runner-2.4bin;D:developSonarsonarqube-5.1.1bin;D:developpythonpython-2.7.10python.exe;C:Program FilesTortoiseGitbin;D:developZeroCZeroCIce-3.6.2bin;D:developapache-maven-3.3.3bin;D:developSonarsonar-scanner-2.8bin;F:JavaDeveloperSQLmysql-5.7.17-winx64bin;F:JavaDeveloperNodejsnodejs7;C:UserswangmengjunAppDataLocalProgramsPythonPython36Scripts;C:UserswangmengjunAppDataLocalProgramsPythonPython36;C:UserswangmengjunAppDataLocalProgramsPythonPython35Scripts;C:UserswangmengjunAppDataLocalProgramsPythonPython35;C:Program Files (x86)OpenV**bin;C:UserswangmengjunAppDataLocalMicrosoftWindowsApps;C:UserswangmengjunAppDataRoamingnpm;.
[INFO ][2017-05-18 21:08:46,555] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.io.tmpdir=C:UsersWANGME~1AppDataLocalTemp
[INFO ][2017-05-18 21:08:46,555] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:java.compiler=<NA>
[INFO ][2017-05-18 21:08:46,556] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:os.name=Windows 8.1
[INFO ][2017-05-18 21:08:46,556] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:os.arch=amd64
[INFO ][2017-05-18 21:08:46,556] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:os.version=6.3
[INFO ][2017-05-18 21:08:46,556] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:user.name=wangmengjun
[INFO ][2017-05-18 21:08:46,556] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:user.home=C:Userswangmengjun
[INFO ][2017-05-18 21:08:46,557] org.apache.zookeeper.Environment.logEnv(Environment.java:97) - Client environment:user.dir=F:JavaDeveloperworkspacesSpringMVCDubboExampledubbo-demodubbo-demo-consumer
[INFO ][2017-05-18 21:08:46,558] org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:373) - Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=30000 watcher=org.I0Itec.zkclient.ZkClient@4c52f14d
[INFO ][2017-05-18 21:08:46,576] org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:1041) - Opening socket connection to server /127.0.0.1:2181
[INFO ][2017-05-18 21:08:46,578] org.apache.zookeeper.ClientCnxn$SendThread.primeConnection(ClientCnxn.java:949) - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
[INFO ][2017-05-18 21:08:46,605] org.apache.zookeeper.ClientCnxn$SendThread.readConnectResult(ClientCnxn.java:738) - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x15c1ba12c860001, negotiated timeout = 30000
[INFO ][2017-05-18 21:08:46,607] org.I0Itec.zkclient.ZkClient.processStateChanged(ZkClient.java:449) - zookeeper state changed (SyncConnected)
[INFO ][2017-05-18 21:08:46,628] com.alibaba.dubbo.registry.support.AbstractRegistry.register(AbstractRegistry.java:302) -  [DUBBO] Register: consumer://192.168.102.51/com.xxx.dubbo.demo.service.GreetingService?application=DemoProvider&category=consumers&check=false&dubbo=2.5.4-SNAPSHOT&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=21572&side=consumer&timestamp=1495112926463, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51
[INFO ][2017-05-18 21:08:46,702] com.alibaba.dubbo.registry.support.AbstractRegistry.subscribe(AbstractRegistry.java:325) -  [DUBBO] Subscribe: consumer://192.168.102.51/com.xxx.dubbo.demo.service.GreetingService?application=DemoProvider&category=providers,configurators,routers&dubbo=2.5.4-SNAPSHOT&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=21572&side=consumer&timestamp=1495112926463, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51
[INFO ][2017-05-18 21:08:46,853] com.alibaba.dubbo.registry.support.AbstractRegistry.notify(AbstractRegistry.java:422) -  [DUBBO] Notify urls for subscribe url consumer://192.168.102.51/com.xxx.dubbo.demo.service.GreetingService?application=DemoProvider&category=providers,configurators,routers&dubbo=2.5.4-SNAPSHOT&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=21572&side=consumer&timestamp=1495112926463, urls: [dubbo://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=dubbo-demo-provider&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=18448&side=provider&threadpool=cached&threads=100&timestamp=1495112774127, empty://192.168.102.51/com.xxx.dubbo.demo.service.GreetingService?application=DemoProvider&category=configurators&dubbo=2.5.4-SNAPSHOT&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=21572&side=consumer&timestamp=1495112926463, empty://192.168.102.51/com.xxx.dubbo.demo.service.GreetingService?application=DemoProvider&category=routers&dubbo=2.5.4-SNAPSHOT&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=21572&side=consumer&timestamp=1495112926463], dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51
[INFO ][2017-05-18 21:08:46,974] com.alibaba.dubbo.remoting.transport.AbstractClient.connect(AbstractClient.java:287) -  [DUBBO] Successed connect to server /192.168.102.51:20880 from NettyClient 192.168.102.51 using dubbo version 2.5.4-SNAPSHOT, channel is NettyChannel [channel=[id: 0x5830ab5f, /192.168.102.51:59578 => /192.168.102.51:20880]], dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51
[INFO ][2017-05-18 21:08:46,975] com.alibaba.dubbo.remoting.transport.AbstractClient.<init>(AbstractClient.java:105) -  [DUBBO] Start NettyClient wangmengjun-PC/192.168.102.51 connect to the server /192.168.102.51:20880, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51
[INFO ][2017-05-18 21:08:47,030] com.alibaba.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:423) -  [DUBBO] Refer dubbo service com.xxx.dubbo.demo.service.GreetingService from url zookeeper://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=DemoProvider&check=false&dubbo=2.5.4-SNAPSHOT&generic=false&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=21572&side=consumer&timestamp=1495112926463, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51
Consumer ==> Hello, Eric
[INFO ][2017-05-18 21:08:47,140] org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:987) - Closing org.springframework.context.support.ClassPathXmlApplicationContext@6ff58334: startup date [Thu May 18 21:08:45 CST 2017]; root of context hierarchy
[INFO ][2017-05-18 21:08:47,140] com.alibaba.dubbo.registry.support.AbstractRegistry.unsubscribe(AbstractRegistry.java:343) -  [DUBBO] Unsubscribe: consumer://192.168.102.51/com.xxx.dubbo.demo.service.GreetingService?application=DemoProvider&category=providers,configurators,routers&dubbo=2.5.4-SNAPSHOT&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=21572&side=consumer&timestamp=1495112926463, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51
[INFO ][2017-05-18 21:08:47,141] com.alibaba.dubbo.remoting.transport.netty.NettyChannel.close(NettyChannel.java:135) -  [DUBBO] Close netty channel [id: 0x5830ab5f, /192.168.102.51:59578 => /192.168.102.51:20880], dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51
[INFO ][2017-05-18 21:08:47,143] com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.disconnected(DubboProtocol.java:130) -  [DUBBO] disconected from /192.168.102.51:20880,url:dubbo://192.168.102.51:20880/com.xxx.dubbo.demo.service.GreetingService?anyhost=true&application=DemoProvider&check=false&codec=dubbo&dubbo=2.5.4-SNAPSHOT&generic=false&heartbeat=60000&interface=com.xxx.dubbo.demo.service.GreetingService&methods=hello&pid=21572&side=consumer&timestamp=1495112926463, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.102.51

从上述日志中可以看出，hello接口已经成功调用，并输出了Consumer ==> Hello, Eric

当然，我们可以切换到provider的输出日志，包含hello方法被调用执行的时间信息。

代码语言：javascript复制

Hello Service is calling : Thu May 18 21:08:47 CST 2017

至此，一个简单的Maven Spring Dubbb Zookeeper整合示例就完成了。后续，可以将provider变成一个Web工程，如springMVC实现等，其中可以和MySQL或者NoSQL（如MongoDB等）集成，进一步完成其它功能。

七、问题解决参考

7.1 No appenders could be found for logger

代码语言：javascript复制

log4j:WARN No appenders could be found for logger (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.

根据描述 ，解决方法很简单，配置一个log4j.properties文件在resouce下即可。

log4j.properties的内容简单如下：

代码语言：javascript复制

# Rules reminder:
# DEBUG < INFO < WARN < ERROR < FATAL

# Global logging configuration
log4j.rootLogger=INFO,stdout

## Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%-5p][%d{yyyy-MM-dd HH:mm:ss,SSS}] %l - %m%n

八、整个工程结构

xml spring zookeeper dubbo maven

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