Java下如何启动windows 的程序

Java的java.lang.Runtime类提供了运行 Windows下cmd环境的方法exec(String command)，所有在Windows cmd命令窗口下执行的程序，都能利用这个方法执行。

下边提供两个封装后的代码，一个是查看程序是否在运行，另一个是启动程序：

1、查看程序是否在运行：其中tasklist /FI "IMAGENAME eq processName.exe"是在Windows CMD命令下执行的命令

/**
	 * 判断某个进程是否在运行中
	 * @param processName
	 * @return
	 */
	public static boolean isRunning(String processName)
    {

        BufferedReader bufferedReader = null;
        try
        {
            Process proc = Runtime.getRuntime().exec("tasklist /FI \"IMAGENAME eq "
                    + processName
                    + "\"");
            bufferedReader = new BufferedReader(new InputStreamReader(proc.getInputStream()));
            String line = null;
            while ((line = bufferedReader.readLine()) != null)
            {
                if (line.contains(processName)) //判断是否存在
                {
                    return true;
                }
            }
            return false;
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
            return false;
        }
        finally
        {
            if (bufferedReader != null)
            {
                try
                {
                    bufferedReader.close();
                }
                catch (Exception ex)
                {
                }
            }
        }
    }

2、执行某个程序，comand例为：start "" "E:\\CardListen\\CardReaderServer.exe"  "127.0.0.1" "8080"，详情可看CMD start命令

/**
	 * 执行Cmd命令
	 * @param command
	 * @return
	 * @throws IOException
	 */
	public static String executeCmd(String command) throws IOException {
	    Runtime runtime = Runtime.getRuntime();
	    Process process = runtime.exec("cmd /c " + command);
	    BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream(), "UTF-8"));
	    String line = null;
	    StringBuilder build = new StringBuilder();
	    while ((line = br.readLine()) != null) {
	        build.append(line);
	    }
	    return build.toString();
	}  

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