Java 在JNA和spwaning childprocess中以静默方式重定向输出（无弹出命令窗口）

我已经为spwan子java进程编写了一个java程序。当它生成子进程时，会打开一个命令提示符窗口，输出重定向到命令提示符。您能告诉我如何在没有额外命令窗口的情况下生成/创建子进程，并将该进程的输出重定向到文件中吗。我正在使用Java6和JNA3.5.2

下面是创建进程的命令

cmd = "c:\\jdk1.6.0_30\\bin\\java.exe -Xmx256m -Xss1024k  -cp <classpath jars>; 
-Dorg.omg.CORBA.ORBClass=org.jacorb.orb.ORB com.xyz.test.MainProgram <program arguments>

---

在windows上，调用

javaw.exe

而不是

java.exe

。这将避免出现“控制台”窗口

至于重定向到文件，最简单的方法可能是向Java子进程传递一个参数以指示所需的文件，然后重定向

System.out

和

System.err

以写入该文件

---

System.out

和

System.err

是

PrintStream

s，因此启动时您只需创建自己的（映射到

FileOutputStream

）即可重定向所有控制台输出。有关详细信息，请参阅。

我可以在创建进程选项中使用以下修改创建静默进程（无控制台）但仍需要您的帮助来重定向流程输出

---

javaw不能解决我的问题。请参阅下面我关于创建静默进程的回答。为什么运行javaw.exe不会阻止控制台窗口显示？顺便说一句，您应该编辑原始问题，而不是添加部分“答案”。您是否阅读了上面描述如何重定向Java进程输出的StackOverflow链接？

    int STARTF_USESTDHANDLES = 0x00000100;

    WinBase.PROCESS_INFORMATION.ByReference processInformation = new WinBase.PROCESS_INFORMATION.ByReference();
    STARTUPINFO startupInfo = new STARTUPINFO();

    // Create the child process. 
    if (!Kernel32.INSTANCE.CreateProcess(
            null, 
            cmd, 
            null, 
            null, 
            true, 
            new DWORD(0x00000020), //new DWORD(0x00000001)
            null, 
            null, 
            startupInfo, 
            processInformation)){
        System.err.println(Kernel32Util.formatMessageFromLastErrorCode(Kernel32.INSTANCE.GetLastError()));
        return false;

    }else {
        System.out.println("Created Process :"+processInformation.dwProcessId.intValue());
        processData.setProcessId(processInformation.dwProcessId.intValue());
        //processData.sethProcess(processInformation.hProcess);
        //com.sun.jna.platform.win32.Kernel32.INSTANCE.WaitForSingleObject(processInformation.hProcess, 0xFFFFFFFF);
        com.sun.jna.platform.win32.Kernel32.INSTANCE.CloseHandle(processInformation.hProcess);
        com.sun.jna.platform.win32.Kernel32.INSTANCE.CloseHandle(processInformation.hThread);
        return true;
    }
} </pre>

private boolean createChildProcess(ProcessData processData,String cmd,String appName){

    //Tried with Output to file
    HANDLEByReference childStdInRead = new HANDLEByReference();
    HANDLEByReference childStdInWrite = new HANDLEByReference();
    HANDLEByReference childStdOutRead = new HANDLEByReference();
    HANDLEByReference childStdOutWrite = new HANDLEByReference();

    int STARTF_USESTDHANDLES = 0x00000100;

    WinBase.PROCESS_INFORMATION.ByReference processInformation = new WinBase.PROCESS_INFORMATION.ByReference();
    STARTUPINFO startupInfo = new STARTUPINFO();
    startupInfo.cb = new DWORD(processInformation.size());
    startupInfo.hStdError = childStdOutWrite.getValue();
    startupInfo.hStdOutput = childStdOutWrite.getValue();
    startupInfo.hStdInput = childStdInRead.getValue();
    startupInfo.dwFlags |= STARTF_USESTDHANDLES;

    SECURITY_ATTRIBUTES saAttr = new SECURITY_ATTRIBUTES();
    saAttr.dwLength = new DWORD(saAttr.size());
    saAttr.bInheritHandle = true;
    saAttr.lpSecurityDescriptor = null;

    // Create a pipe for the child process's STDOUT. 
    if (!com.sun.jna.platform.win32.Kernel32.INSTANCE.CreatePipe(childStdOutRead, childStdOutWrite, saAttr, 0)){
        System.err.println(Kernel32.INSTANCE.GetLastError());
    }

    // Ensure the read handle to the pipe for STDOUT is not inherited.
    if (!com.sun.jna.platform.win32.Kernel32.INSTANCE.SetHandleInformation(childStdOutRead.getValue(), HANDLE_FLAG_INHERIT, 0)){
        System.err.println(Kernel32.INSTANCE.GetLastError());;
    }

    // Create the child process. 
    if (!Kernel32.INSTANCE.CreateProcess(
            null, 
            cmd, 
            null, 
            null, 
            true, 
            new DWORD(0x00000020), //new DWORD(0x00000001)
            null, 
            null, 
            startupInfo, 
            processInformation)){
        System.err.println(Kernel32Util.formatMessageFromLastErrorCode(Kernel32.INSTANCE.GetLastError()));
        return false;

    }else {
        System.out.println("Created Process :"+processInformation.dwProcessId.intValue());
        processData.setProcessId(processInformation.dwProcessId.intValue());
        //processData.sethProcess(processInformation.hProcess);
        //com.sun.jna.platform.win32.Kernel32.INSTANCE.WaitForSingleObject(processInformation.hProcess, 0xFFFFFFFF);

        HANDLE inputFile = com.sun.jna.platform.win32.Kernel32.INSTANCE.CreateFile(
                "c:\\"+processInformation.dwProcessId.intValue()+".txt", 
                GENERIC_READ, 
                0, 
                null, 
                OPEN_EXISTING, 
                FILE_ATTRIBUTE_READONLY, 
                null);
        //ReadFromPipe(childStdOutRead,childStdOutWrite);
        com.sun.jna.platform.win32.Kernel32.INSTANCE.CloseHandle(processInformation.hProcess);
        com.sun.jna.platform.win32.Kernel32.INSTANCE.CloseHandle(processInformation.hThread);
        return true;
    }
}

Kernel32.INSTANCE.CreateProcess(
            null, 
            cmd, 
            null, 
            null, 
            true, 
            new DWORD(WinBase.CREATE_NO_WINDOW),
            null, 
            null, 
            startupInfo, 
            processInformation)