Question

我的问题涉及Process和Runtime，并尝试在允许主Java Swing GUI更新状态栏的同时运行它，所以这里是：

过去三个月，我一直在为我的软件开发小组开发内部开发工具。基础是它根据用户的条目接受GUI定义的一些变量。然后，它将这些编译成批处理文件，供命令行工具解释。点击“补丁”按钮后，只需让GUI运行命令行就相当有趣了，但我无法读取执行过程中可能出现的任何错误，这在很大程度上归功于我使用的事实runtimeVar.exec（）的参数中的“start”。我能够找到一个常驻Java人来帮助我，但它从分支进程切换到另一个线程，在同一个线程中运行进程，阻止GUI响应其他任何事情。虽然该工具运行良好，但beta测试人员仍在抱怨，因为他们不知道它是否正常工作。

总而言之：我需要将runtimeVar.exec（）分叉到另一个进程以允许状态栏更新，但这样做需要一些重大的返工，因为这是我的代码目前看来像：

    private void runPatchTool(File directory, String batchName) throws Exception{
    /*************************************************************************** 
     * Method: runPatchTool
     * Tab: Both
     * Status: Completed, as of 1/10/12
     * 
     * This method will read in a directory and batch file name and output
     * these commands to the command line, running the batch file while reading
     * in the output via the the InputStreamReader and parsing this to check
     * for any errors that may have occurred during the patching.
     * 
     **************************************************************************/
    String tempOFP = null;
    Boolean labType = false;
    String tmpCountry = null;

    int yesNo;
    String s = " ";
    String er = " ";
    String[] query = new String[]{"cmd.exe","/c",directory.getPath() + "\\" + batchName};
//    displayStatus("Running Patch_tool.exe . . . ");    
    ProcessBuilder pb = new ProcessBuilder(query);
    pb.directory(directory);
    try{
        Process proc = pb.start();
        InputStreamReader inStrmRd = new InputStreamReader(proc.getInputStream());
        InputStreamReader erStrmRd = new InputStreamReader(proc.getErrorStream());
        BufferedReader commandResult = new BufferedReader(inStrmRd);
        BufferedReader errResult = new BufferedReader(erStrmRd);
        String line = " ";
        String erLine = " ";
        try {
            while ((line = commandResult.readLine()) != null) {
                s += line + "\n";
            }
            while((erLine = errResult.readLine()) != null){
                er += erLine + "\n";
            }
        } catch (Exception e) {
            JOptionPane.showMessageDialog(this,"Path Tool Error: " + e, "ERROR", JOptionPane.ERROR_MESSAGE);
        }
//        readOutputFiles();
    } catch(IOException e){
        JOptionPane.showMessageDialog(this,"Path Tool Error: " + e, "ERROR", JOptionPane.ERROR_MESSAGE);
    }
    StringBuffer erMsg = new StringBuffer("at least one assembler error has occurred");
    CharSequence erMsgSeq = erMsg;
    try{
        PrintWriter outputFile = new PrintWriter(new FileOutputStream(directory.getPath() + "\\cmdout.txt"));
        outputFile.print(s);
        outputFile.close();
        PrintWriter erFile = new PrintWriter(new FileOutputStream(directory.getPath() + "\\errout.txt"));
        erFile.print(er);
        erFile.close();
    } catch(Exception ex){
        System.out.println("Something happened in PrintWriter: " + ex);
    }
    }

我省略了更多代码，但它与手头的具体问题无关。

好的，尽管如此，有没有一种方法可以在不阻止GUI的情况下运行此进程，并在执行下一步之前等待进程结束（使用回调或其他方法）？

Java进程线程问题

0 个答案: