理很简单。 在机器上做一个测试的文件。如果我们的程序能够读取到这个文件,则证明运行正常 import java.net.URL; import java.net.URLConnection; import java.util.Date; /** * * */ public class Detector { private static void keepTomcatAlive() throws NullPointerException { String s; String t = new String("tomcat5.exe"); boolean isTomcatAlive = false; java.io.BufferedReader in; try { URL url = new URL("http://localhost/heartbeat.htm"); URLConnection con = url.openConnection(); in = new java.io.BufferedReader(new java.io.InputStreamReader(con.getInputStream())); con.setConnectTimeout(1000); con.setReadTimeout(4000); while ((s = in.readLine()) != null) { if (s.length() > 0) { // 如果能够读取到页面则证明可用 return; } } in.close(); } catch (Exception ex) { } try { java.lang.Process p = java.lang.Runtime.getRuntime().exec("tasklist"); in = new java.io.BufferedReader(new java.io.InputStreamReader(p.getInputStream())); while ((s = in.readLine()) != null) { if (s.startsWith(t)) { isTomcatAlive = true; break; } } in.close(); } catch (Exception e) { e.printStackTrace(); } if (isTomcatAlive) { System.out.println("<" + new Date() + "> Tomcat is alive but not response!"); stopTomcat(); } startTomcat(); } public static void stopTomcat() { try { java.lang.Process p = java.lang.Runtime.getRuntime().exec("net stop \"Apache Tomcat\""); java.io.BufferedReader in = new java.io.BufferedReader(new java.io.InputStreamReader(p.getInputStream())); String s; String t = "成功停止"; boolean restart = false; while ((s = in.readLine()) != null) { if (s.indexOf(t) != -1) { restart = true; break; } } System.out.println("<" + new Date() + "> Tomcat is stop " + (restart ? "OK" : "ERROR")); } catch (Exception e) { e.printStackTrace(); } } public static void startTomcat() { try { java.lang.Process p = java.lang.Runtime.getRuntime().exec("net stop \"Apache Tomcat\""); } catch (Exception e) { e.printStackTrace(); } try { java.lang.Process p = java.lang.Runtime.getRuntime().exec("net start \"Apache Tomcat\""); java.io.BufferedReader in = new java.io.BufferedReader(new java.io.InputStreamReader(p.getInputStream())); String s; String t = "启动成功"; boolean restart = false; while ((s = in.readLine()) != null) { if (s.indexOf(t) != -1) { restart = true; break; } } System.out.println("<" + new Date() + "> Tomcat is start " + (restart ? "OK" : "ERROR")); } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) { while (true) { try { Detector.keepTomcatAlive(); Thread.sleep(30000); } catch (Exception ex) { } } } }
远程重启 tomcat
测试成功,jsp 代码如下: <%@ page language="java" contentType="text/html; charset=GB18030" pageEncoding="GB18030"%> <% Runtime run = Runtime.getRuntime(); Process pro = run.exec("d:\\tomcat\\bin\\restart.bat"); // 替换为你的路径,linux下为.sh , 如果单独调用 shutdown.bat 就关闭了。 单独启动没戏,因为tomcat已经停了 %> restart.bat call shutdown.bat delay.exe 5 call startup.bat 唯一的问题,你需要一个延迟程序,就是那个 delay.exe 5, 否则可能还没有关闭就启动了,80端口被占用 如果是服务,就更简单了,restart.bat 里面写上 net stop Tomcat 和 net start Tomcat 就可以了!