Tomcat实现自动重启

原文：Tomcat实现自动重启

源代码下载地址：http://www.zuidaima.com/share/1550463736564736.htm

中秋国庆马上来临，由于客户的服务器不是很稳定，导致应用经常崩溃，所以写了个重启tomcat的程序，拿来给大家分享。 java后台程序 上图：

大概思路是这样的： 1.监控服务器端是否能正常访问； 2.如果不能正常访问，则根据配置的信息来重新启动tomct服务 如果能正常访问则隔一段时间在监控。。。 其中用到了doc命令，代码注释很明确，不明白的可以问我

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Properties;
/**
 * @describe:TomcatMonitor.java
 * 
 * @date 2013-9-18
 * @author 小C www.zuidaima.com
 */
public class TomcatMonitor implements Runnable{
    String procName="tomcat6.exe"; //进程名称
    //String fullProcName="C:\\Tomcat6\\bin\\tomcat6.exe";
    String fullProcName=""; //tomcat6.exe绝对物理地址
    //String command="cmd.exe /c start";
    String command=""; //系统命令
    //String testHttp="http://127.0.0.1:8080";
    String testHttp="";  //测试连接地址
    int testIntervalTime=1;//测试连接间隔时间，单位为秒
    int waitIntervalTime=2; //等待测试间隔时间，单位为秒
    int testTotalCount=5; //测试连接总次数
    
    Thread thread=null;
    
	public TomcatMonitor(){
		InputStream in = TomcatMonitor.class.getResourceAsStream("config.properties");
		Properties p = new Properties();
		try {
			p.load(in);
			procName=p.getProperty("procName");
			fullProcName=p.getProperty("fullProcName");
			command=p.getProperty("command");
			testHttp=p.getProperty("testHttp");
			testIntervalTime=Integer.parseInt(p.getProperty("testIntervalTime"));
			waitIntervalTime=Integer.parseInt(p.getProperty("waitIntervalTime"));
			testTotalCount=Integer.parseInt(p.getProperty("testTotalCount"));
			
			System.out.println("初始化成功!");
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		thread=new Thread(this);
		thread.start();		
	}
	
	public void run() {
        String[] cmd = {"tasklist"};
        System.out.println("正在监控中...");   
        int testCount=0;
		while(true){
			testCount=0;
			testCount++;			
            boolean isrun=test();
            System.out.println("正在启动测试连接,尝试连接次数为:"+testCount+",结果为:"+(isrun==false?"失败.":"成功!"));	            
            while(!isrun){
            	if(testCount>=testTotalCount)break;
            	try {
					thread.sleep(testIntervalTime*1000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				testCount++;
				System.out.println("正在启动测试连接,尝试连接次数为:"+testCount+",结果为:"+(isrun==false?"失败.":"成功!"));            	
            	isrun=test();
            }
            
            if(!isrun){
            	System.out.println("测试连接失败,正在重启tomcat");
            	try{        	        
        	        Process proc = Runtime.getRuntime().exec(cmd);
        	        BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));                        
        	        String string_Temp = in.readLine();
        	        while (string_Temp != null)
        	        {
    	                if(string_Temp.toLowerCase().indexOf(procName)!=-1){
    	                    Runtime.getRuntime().exec("Taskkill /f /im "+procName);
    	                    break;
    	                }
    	                string_Temp = in.readLine();
        	        }
        	        thread.sleep(5000);

        	        Process p=Runtime.getRuntime().exec(command+" \"\" \""+fullProcName+"\""); 
        	        //Process p=Runtime.getRuntime().exec("net start tomcat6");	
        	        System.out.println("重启tomcat成功");
        		}catch(Exception e){
        			e.printStackTrace();
        		}            	
            }
			
            try {
				thread.sleep(waitIntervalTime*1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
            
            isrun=test();
		}		
	}
	
	public boolean test(){
		
		URL url=null;		
		try {
			url = new URL(testHttp);
		} catch (MalformedURLException e) {
			e.printStackTrace();
		}
		try {
			URLConnection urlConn=url.openConnection();
			urlConn.setReadTimeout(15000);
			BufferedReader reader = new BufferedReader(new InputStreamReader( urlConn.getInputStream()));            //实例化输入流，并获取网页代码
				   String s;                                       
				   while ((s = reader.readLine()) != null) {
				      return true;   
				   }				   		
		} catch (Exception e) {
          return false;
		}
		return false;
	}
	
	
	public static void main(String[] args) throws Exception{
		TomcatMonitor tm=new TomcatMonitor();
	}
	

}