java程序监控tomcat中部署的项目的状态以及控制某些项目的启动停止

原文：http://blog.csdn.net/liuyuqin1991/article/details/49280777

步骤如下： 
①：首先授权用户使获得这些权限 
You can find the role names in the web.xml file of the Manager web application. The available roles are:

manager-gui — Access to the HTML interface. 
manager-status — Access to the “Server Status” page only. 
manager-script — Access to the tools-friendly plain text interface that is described in this document, and to the “Server Status” page. 
manager-jmx — Access to JMX proxy interface and to the “Server Status” page.

具体方法：修改/conf目录下的tomcat-users.xml文件，添加如下代码：

<role rolename="manager-status"/>
<role rolename="manager"/>
<role rolename="manager-jmx"/>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="admin"/>
<user username="admin" password="123456" roles="manager,manager-gui,admin,manager-status,manager-jmx,manager-script"/>

这里创建一个admin 密码为123456的用户

②：创建通用tomcatUtil方法：

public class TomcatHTMLUtil {

    public static String message(String operateURL) {

        StringBuffer dataResult = new StringBuffer();
        URL url = null;
        try {
            url = new URL(operateURL);

            URLConnection conn = (URLConnection) url.openConnection();
            //这里我是把admin，123456 这个用户信息放到了一个json文件中以json形式存放，然后取出来，如果不是以这种方式存放，则可以直接设置username = admin ，password =123456
            String data = FileUtil.readJson();

            String username = data.substring(1,data.length()-1).split(",")[0].split(":")[1].substring
                    (1,data.substring(1,data.length()-1).split(",")[0].split(":")[1].length()-1);
            String password =data.substring(1,data.length()-1).split(",")[1].split(":")[1].substring
                    (1,data.substring(1,data.length()-1).split(",")[0].split(":")[1].length());

            String configuration = username+":"+password; // manager角色的用户
            String encodedPassword = new BASE64Encoder().encode(configuration.getBytes());
            conn.setRequestProperty("Authorization", "Basic " + encodedPassword);
            // URL授权访问 -- End

            InputStream is = conn.getInputStream();
            BufferedReader bufreader = new BufferedReader(new InputStreamReader(is));
            String line = null;
            while ((line = bufreader.readLine()) != null) {
                dataResult.append(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dataResult.toString();
    }
}

③：

/**
     * 获取tomcat正在运行的webApp的参数
     * @return
     */
    public ArrayList<WebApp> getTomcatWebAppData(){

        ArrayList<WebApp> webAppArrayList = new ArrayList<WebApp>();

        String data = TomcatHTMLUtil.message("http://localhost:8080/manager/text/list");

        String[] oldDataStrs = data.split("/");

        if(oldDataStrs[0].startsWith("OK")){
            for (int i = 0; i < oldDataStrs.length; i++) {
                String name = oldDataStrs[i].split(":")[0];
                if(name.startsWith("legacy-proxy")){
                    WebApp webApp = new WebApp();
                    webApp.setName(name);
                    if(oldDataStrs[i].split(":")[1].equals("running")){
                        if(oldDataStrs[i].split(":")[2].equals("0")){
                            webApp.setStatus("运行");
                        }
                        else{
                            webApp.setStatus("异常");
                        }
                    }
                    else if(oldDataStrs[i].split(":")[1].equals("stopped")){
                        if(oldDataStrs[i].split(":")[2].equals("0")){
                            webApp.setStatus("停止");
                        }
                        else{
                            webApp.setStatus("异常");
                        }
                    }
                    else{
                        webApp.setStatus("异常");
                    }
                    webAppArrayList.add(webApp);
                }
            }
        }
        return webAppArrayList;
    }

/**
     * 重新部署一个项目
     * @param webAppName
     * @return
     */
    public boolean reloadWebApp(String webAppName){
        String data = TomcatHTMLUtil.message("http://localhost:8080/manager/text/reload?path=/"+webAppName);
        if(data.startsWith("OK")){
            return true;
        }
        else {
            return false;
        }
    }

    /**
     * 停止一个项目
     * @param webAppName
     * @return
     */
    public boolean stopWebApp(String webAppName){
        String data = TomcatHTMLUtil.message("http://localhost:8080/manager/text/stop?path=/"+webAppName);
        if(data.startsWith("OK")){
            return true;
        }
        else {
            return false;
        }
    }

    /**
     * 开始一个项目
     * @param webAppName
     * @return
     */
    public boolean startWebApp(String webAppName){
        String data = TomcatHTMLUtil.message("http://localhost:8080/manager/text/start?path=/"+webAppName);
        if(data.startsWith("OK")){
            return true;
        }
        else {
            return false;
        }
    }

webApp的domain对象：

package domain;

/**
 * Created by Administrator on 2015/10/20.
 * webApp的相关信息
 */

public class WebApp {

    /**
     * 项目名称
     */
    private String name;

    /**
     * 运行状态 "成功" or "停止"
     */
    private String status;

    public String getName() {
        return name;
    }

    public String getStatus() {
        return status;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setStatus(String status) {
        this.status = status;
    }
}

基本上核心功能已经出来了，剩下的就是写桌面swing程序了，我就不贴代码了 
OK，完成收工，其实是很简单的。