java实现Windows系统进程查询及kill进程和重启进程，适用查看邮件等

 1 /**
 2      * @desc 启动进程
 3      * @author zp
 4      * @date 2018-3-29
 5      */
 6     public static void startProc(String processName) { 
 7          log.info("启动应用程序：" + processName);  
 8          if (StringUtils.isNotBlank(processName)) {  
 9              try {  
10                  Desktop.getDesktop().open(new File(processName));  
11              } catch (Exception e) {  
12                  e.printStackTrace();  
13                  log.error("应用程序：" + processName + "不存在！");  
14              }  
15          }   
16     }
17     /**
18      * @desc 杀死进程
19      * @author zp
20      * @throws IOException 
21      * @date 2018-3-29
22      */
23     public static void killProc(String processName) throws IOException {  
24         log.info("关闭应用程序：" + processName);  
25         if (StringUtils.isNotBlank(processName)) {  
26             executeCmd("taskkill /F /IM " + processName);  
27         } 
28     }
29     /**
30      * @desc 执行cmd命令 
31      * @author zp
32      * @date 2018-3-29
33      */
34     public static String executeCmd(String command) throws IOException {  
35         log.info("Execute command : " + command);  
36         Runtime runtime = Runtime.getRuntime();  
37         Process process = runtime.exec("cmd /c " + command);  
38         BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream(), "UTF-8"));  
39         String line = null;  
40         StringBuilder build = new StringBuilder();  
41         while ((line = br.readLine()) != null) {  
42             log.info(line);  
43             build.append(line);  
44         }  
45         return build.toString();  
46     }  
47     /**
48      * @desc 判断进程是否开启
49      * @author zp
50      * @date 2018-3-29
51      */
52     public static boolean findProcess(String processName) {
53         BufferedReader bufferedReader = null;
54         try {
55             Process proc = Runtime.getRuntime().exec("tasklist -fi " + '"' + "imagename eq " + processName +'"');
56             bufferedReader = new BufferedReader(new InputStreamReader(proc.getInputStream()));
57             String line = null;
58             while ((line = bufferedReader.readLine()) != null) {
59                 if (line.contains(processName)) {
60                     return true;
61                 }
62             }
63             return false;
64         } catch (Exception ex) {
65             ex.printStackTrace();
66             return false;
67         } finally {
68             if (bufferedReader != null) {
69                 try {
70                     bufferedReader.close();
71                 } catch (Exception ex) {}
72             }
73         }
74     }
75     
76      //downfile = "D:\\DownFile\\DownFile.exe";
77     String url = request.getParameter("downfile"); 
78     String procName = url.substring(url.lastIndexOf("\\")+1,url.length());
79     boolean exist= findProcess(procName); 
80     try {
81         if (exist) { 
82             // 存在，那么就先杀死该进程
83             killProc(procName);
84             // 在启动
85             startProc(url);
86         }else {
87             startProc(url);
88         }
89     } catch (Exception e) {
90         // TODO: handle exception
91         log.error("重启/杀死提取程序失败。。。");  
92     }