java编写service详细笔记 - centos7.2实战笔记(windows类似就不在重复了)

java编写service详细笔记 - centos7.2实战笔记(windows类似就不在重复了) 

目标效果(命令行启动服务)：

service xxxxd start #启动服务 

service xxxxd stop  #停止服务





详细步骤

一、编译并安装jsvc

    官网 https://commons.apache.org/daemon/

    1)建立目录

      cd /

      mkdir jsvc

    2)下载jsvc源码

      wget https://mirrors.tuna.tsinghua.edu.cn/apache//commons/daemon/source/commons-daemon-1.0.15-src.tar.gz

    3)解压源码

      tar zxvf commons-daemon-1.0.15-src.tar.gz

    4)编译源码

      编译器为了省事，先给目录下所有文件设置可执行权限

      chmod -R 777 *

cd /jsvc/commons-daemon-1.0.15-src/src/native/unix

      ./support/buildconf.sh

      ./configure --with-java=/opt/jdk #注 /opt/jdk 是我的java安装目录

      make #编译

    5)编译后

     会在 /jsvc/commons-daemon-1.0.15-src/src/native/unix 生成 可执行文件jsvc

     设置一下执行权限

     chmod 777 /jsvc/commons-daemon-1.0.15-src/src/native/unix/jsvc

二、实战编写一个小小的javasocket服务,代码如下：

    1)test_service.java

    ========================================================================

package com.xiaobaijiuxing.jsvc;





import org.apache.commons.daemon.Daemon;

import org.apache.commons.daemon.DaemonContext;

import org.apache.commons.daemon.DaemonInitException;





/** 

* @date 2017-5-2 

* @author 小白救星 

*/

public class test_service implements Daemon {

public static boolean isstop = false;

   public static void main(String args[]) { 

System.out.println("Hello World2!"); 

   }

   /* (non-Javadoc) 

    * @see org.apache.commons.daemon.Daemon#destroy() 

    */

   @Override

   public void destroy() {

// TODO Auto-generated method stub  

System.out.println("JsvcTest destory method...");

   }





   /* (non-Javadoc) 

    * @see org.apache.commons.daemon.Daemon#init(org.apache.commons.daemon.DaemonContext) 

    */

   @Override

   public void init(DaemonContext ctx) throws DaemonInitException, Exception {

// TODO Auto-generated method stub  

System.out.println("JsvcTest init method..." + ctx.toString());

   }





   /* (non-Javadoc) 

    * @see org.apache.commons.daemon.Daemon#start() 

    */

   @Override

   public void start() throws Exception {

// TODO Auto-generated method stub  

int i =0;

//while (!isstop)

//{

Server server = new Server();

server.init();

System.out.println("JsvcTest start method..." + i);

i = i +1;

//}

   }





   /* (non-Javadoc) 

    * @see org.apache.commons.daemon.Daemon#stop() 

    */

   @Override

   public void stop() throws Exception {

// TODO Auto-generated method stub 

isstop = true;

System.out.println("JsvcTest stop method...");

   }





}

    ========================================================================

    2)Server.java

    ========================================================================

package com.xiaobaijiuxing.jsvc; 

  

import java.io.BufferedReader;  

import java.io.DataInputStream;  

import java.io.DataOutputStream;  

import java.io.InputStreamReader;  

import java.net.ServerSocket;  

import java.net.Socket;  

 

public class Server {  

   public static final int PORT = 12345;//监听的端口号     

     

   //public static void main(String[] args) {    

   //    System.out.println("服务器启动...\n");    

   //    Server server = new Server();    

   //    server.init();    

   //}    

   

   public void init() {  

System.out.println("服务器启动...\n"); 

try {    

   ServerSocket serverSocket = new ServerSocket(PORT);    

   //while (true) {    

// 一旦有堵塞, 则表示服务器与客户端获得了连接    

Socket client = serverSocket.accept();    

// 处理这次连接    

new HandlerThread(client);    

   //}    

} catch (Exception e) {    

   System.out.println("服务器异常: " + e.getMessage());    

}    

   }    

   

   private class HandlerThread implements Runnable {    

private Socket socket;    

public HandlerThread(Socket client) {    

   socket = client;    

   new Thread(this).start();    

}    

   

public void run() {    

   try {    

// 读取客户端数据    

DataInputStream input = new DataInputStream(socket.getInputStream());  

String clientInputStr = input.readUTF();//这里要注意和客户端输出流的写方法对应,否则会抛 EOFException  

// 处理客户端数据    

System.out.println("客户端发过来的内容:" + clientInputStr);    

   

// 向客户端回复信息    

DataOutputStream out = new DataOutputStream(socket.getOutputStream());    

System.out.print("请输入:\t");    

// 发送键盘输入的一行    

String s = new BufferedReader(new InputStreamReader(System.in)).readLine();    

out.writeUTF(s);    

 

out.close();    

input.close();    

   } catch (Exception e) {    

System.out.println("服务器 run 异常: " + e.getMessage());    

   } finally {    

if (socket != null) {    

   try {    

socket.close();    

   } catch (Exception e) {    

socket = null;    

System.out.println("服务端 finally 异常:" + e.getMessage());    

   }    

}    

   }   

}    

   }    

} 

    ========================================================================

三、将我们的java代码打包到test_service.jar

我采用ant打包，因为我感觉ant最简单，写代码只要用好了EditPlus+ant就可以，不需要其它开发工具

    1)ant编译配置文件build.xml

    ========================================================================

    <?xml version="1.0" encoding="UTF-8" ?>

<project name="test_service" default="run" basedir=".">

<property name="src" value="src"/>

<property name="dest" value="classes"/>

<property name="doc.dir" value="doc"/>

<property name="test_services_jar" value="test_service.jar"/>

<property name="main.class" value="com.xiaobaijiuxing.jsvc.test_service"/>

   <path id="lib_classpath">

       <fileset dir="lib/">

           <include name="*.jar"/>

       </fileset>  

   </path>


<target name="init">

  <mkdir dir="${dest}"/>

</target>

<target name="compile" depends="init">

  <javac encoding="utf-8" srcdir="${src}" destdir="${dest}" includeantruntime="on">

    <classpath refid="lib_classpath"/>

  </javac>





</target>

<target name="build" depends="compile">

  <jar encoding="utf-8" jarfile="${test_services_jar}" basedir="${dest}">

  <manifest>

<!--<attribute name="Main-Class" value="${main.class}"/>-->

<attribute name="Class-Path" value="lib/commons-daemon-1.0.15.jar"/>

  </manifest>

  </jar>

</target>

<target name="run" depends="clean,build">

</target>

<target name="clean">

  <delete dir="${dest}" />

  <delete file="test_services_jar" />

</target>

<target name="rerun" depends="clean,run">

  <ant target="clean" />

  <ant target="run" />

</target>

<target name="createdoc">

     <delete dir="${doc.dir}" />

     <mkdir dir="${doc.dir}"/>

     <javadoc destdir="${doc.dir}" encoding="UTF-8" docencoding="UTF-8">

      <packageset dir="${src}">

       <include name="**"/>

      </packageset>

     </javadoc>

    </target>

</project>

    ========================================================================

    2)编译生成test_service.jar包

    命令行运行 ant回车即可

    3)建立目录

    mkdir /jsvc/commons-daemon-1.0.15-src/app

    mkdir /jsvc/commons-daemon-1.0.15-src/log

    mkdir /jsvc/commons-daemon-1.0.15-src/tmp

    chmod -R 777  *

    4)将编译出来的jar包及要用到的lib目录拷贝到 /jsvc/commons-daemon-1.0.15-src/app 目录下

    app目录下是 test_service.jar

    app/lib目录下是 commons-daemon-1.0.15.jar

四、编写linux centos7.2 service 脚本并运行

    1)cd /etc/init.d/

    2)vi testserviced #内容如下

    ========================================================================

#!/bin/sh





RETVAL=0

prog="jsvc"

JAVA_HOME=/opt/jdk

APP_HOME=/jsvc/commons-daemon-1.0.15-src/app





#jsvc所在的目录  

DAEMON_HOME=/jsvc/commons-daemon-1.0.15-src/src/native/unix





APP_USER=root

TMP_DIR=/jsvc/commons-daemon-1.0.15-src/app/tmp

PID=/jsvc/commons-daemon-1.0.15-src/app/testserviced.pid

CLASSPATH=/jsvc/commons-daemon-1.0.15-src/app/test_service.jar:/jsvc/commons-daemon-1.0.15-src/app/lib/commons-daemon-1.0.15.jar





case "$1" in





start)

#echo $DAEMON_HOME

# Start Serivce

$DAEMON_HOME/jsvc -user $APP_USER -home $JAVA_HOME -Djava.io.tmpdir=$TMP_DIR -wait 5000 -pidfile $PID -outfile $APP_HOME/log/jsvc.out -errfile '&1' -cp $CLASSPATH com.jason.jsvc.test_service &





# To get a verbose JVM  

 

#-verbose \  

 

# To get a debug of jsvc.  

 

#-debug \  

 

exit $?

 

;;





 





stop)





#  

 

# Stop Serivce  

 

#  

 

#$DAEMON_HOME/jsvc -stop -pidfile $PID com.jason.jsvc.test_service

 

exit $?





;;









*)

 

echo "Usage service testserviced start/stop"

 

exit 1;;

 

esac

:wq #保存

    ========================================================================

    3)添加centos系统服务

chmod 777 /etc/init.d/testserviced

chkconfig --add testserviced

    4)启动和关闭服务

    service testserviced start

查看我们服务启动后的socket服务端口是否启动了监听

lsof -i:12345

返回结果：

[root@xiaobaijiuxing ~]# lsof -i:12345

[root@xiaobaijiuxing ~]# service testserviced start

[root@xiaobaijiuxing ~]# lsof -i:12345

COMMAND    PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME

jsvc    171926 root    9u  IPv6 5672748      0t0  TCP *:italk (LISTEN)

    service testserviced stop

五、大功告成

   作者：小白救星 原创，未经许可可以随意转发