一些脚本程序的备注

1、关于linux启动应用程序脚本，自动获取PID并存入文件

 

#!/bin/bash
DIRNAME=`dirname $0`
AppRoot=`cd $DIRNAME/../App; pwd`
pid=$AppRoot/pid_0
if [ -s $pid ] && kill -0 `cat $pid` 2>/dev/null
	then
		echo "[Warning: Service is Running Now]"
	else
		echo "[Sevice Starting...]"
		"$JAVA" XXX.jar 2>> /dev/null & echo $! > $pid
fi

 2、对应关闭脚本

 

#!/bin/bash
DIRNAME=`dirname $0`
AppRoot=`cd $DIRNAME/../App; pwd`
pid=$AppRoot/pid_0
echo "Shutdown Service..."
kill -9 `cat $pid`

 

3.java程序内获取当前应用PID

FileWriter fw = null;
		try {
			String name = ManagementFactory.getRuntimeMXBean().getName();
			String pid = name.split("@")[0];
			File directory = new File("");//设定为当前文件夹
			String path = directory.getAbsolutePath();
			fw = new FileWriter(path + "/pid_0");
			fw.write(pid);
			fw.flush();
		} catch (IOException e) {
			logger.fatal(e);
		} finally {
			try {
				if (null != fw) {
					fw.close();
				}
			} catch (IOException e) {
				logger.fatal(e);
			}
		}