Question

Device1.bat

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    String name=request.getParameter("name");
    String commun=request.getParameter("commun");
    String password=request.getParameter("password");
      Connection conn = null;
      Statement  statement = null;


    try{
    Context initContext = new InitialContext();
    Context envContext = (Context) initContext.lookup("java:comp/env");
    DataSource ds = (DataSource) envContext.lookup("jdbc/community");
     conn = ds.getConnection();

      statement = conn.createStatement();
      String sql = "select memberragas from windowragas where memberragas='"+name+"' and liquid_key='"+commun+"' and chabhiragas='"+password+"'";
      ResultSet rs =statement.executeQuery(sql);
     if(rs.next()){
         System.out.println("welcome "+name+"");
         HttpSession session=request.getSession();
         session.setAttribute("name", name);
         session.setAttribute("commun", commun);
         RequestDispatcher rd = request.getRequestDispatcher("/homey");
         rd.forward(request, response);


     }else{
         System.out.println("either ur username or password or community was wrong");
         response.sendRedirect(request.getContextPath());
     }
    }
 catch (NamingException ex) {
    System.err.println(ex);
} catch (SQLException ex) {
    System.err.println(ex);
}finally {

    try {
       if (statement != null) statement.close();
       if (conn != null) conn.close();  // return to pool
    } catch (SQLException ex) {
        ex.printStackTrace();
    }
 }
}

Device2.bat

@echo off
    :: script for updating property files
    SETLOCAL EnableExtensions
    SETLOCAL EnableDelayedExpansion
    if "%3"=="" (
      ECHO Script will optionally accept 3 args: PropKey PropVal File
      SET PROPKEY=Deviceid
      SET PROPVAL=dfs2341f
      SET FILE=config.properties
    ) ELSE (
      SET PROPKEY=%1
      SET PROPVAL=%2
      SET FILE=%3
    )
    FINDSTR /B %PROPKEY% %FILE% >nul
    IF %ERRORLEVEL% EQU 1 GOTO nowork
    MOVE /Y "%FILE%" "%FILE%.bak"
    FOR /F "USEBACKQ tokens=*" %%A IN (`TYPE "%FILE%.bak" ^|FIND /N /I "%PROPKEY%"`) DO (
      SET LINE=%%A
    )
    FOR /F "tokens=1,2* delims=]" %%S in ("%LINE%") DO SET LINE=%%S
    SET /A LINE=%LINE:~1,6%
    SET /A COUNT=1
    FOR /F "USEBACKQ tokens=*" %%A IN (`FIND /V "" ^<"%FILE%.bak"`) DO (
      IF "!COUNT!" NEQ "%LINE%" (
          ECHO %%A>>"%FILE%"
      ) ELSE (
          ECHO %PROPKEY%=%PROPVAL%>>"%FILE%"
          ECHO Updated %FILE% with value %PROPKEY%=%PROPVAL%
      )
      SET /A COUNT+=1
    )
    GOTO end
    :nowork
    echo Didn't find matching string %PROPKEY% in %FILE%. No work to do.
    pause
    :end

我一次运行device1.bat和device2.bat。 Device1.bat运行正常。但是device2.bat抛出进程无法访问该文件，因为正在被另一个进程使用。请帮助我解决这个问题。

Answer 1

您可以为device2制作config.properties的临时副本，以便稍后使用和删除。设备1：

@echo off
    :: script for updating property files
    SETLOCAL EnableExtensions
    SETLOCAL EnableDelayedExpansion
    if "%3"=="" (
      ECHO Script will optionally accept 3 args: PropKey PropVal File
      SET PROPKEY=Deviceid
      SET PROPVAL=dfs2341f
      SET FILE=config.properties
  ::make a temporary copy of config.properties
      copy config.properties config2.properties
    ) ELSE (
      SET PROPKEY=%1
      SET PROPVAL=%2
      SET FILE=%3
    )
    FINDSTR /B %PROPKEY% %FILE% >nul
    IF %ERRORLEVEL% EQU 1 GOTO nowork
    MOVE /Y "%FILE%" "%FILE%.bak"
    FOR /F "USEBACKQ tokens=*" %%A IN (`TYPE "%FILE%.bak" ^|FIND /N /I "%PROPKEY%"`) DO (
      SET LINE=%%A
    )
    FOR /F "tokens=1,2* delims=]" %%S in ("%LINE%") DO SET LINE=%%S
    SET /A LINE=%LINE:~1,6%
    SET /A COUNT=1
    FOR /F "USEBACKQ tokens=*" %%A IN (`FIND /V "" ^<"%FILE%.bak"`) DO (
      IF "!COUNT!" NEQ "%LINE%" (
          ECHO %%A>>"%FILE%"
      ) ELSE (
          ECHO %PROPKEY%=%PROPVAL%>>"%FILE%"
          ECHO Updated %FILE% with value %PROPKEY%=%PROPVAL%
      )
      SET /A COUNT+=1
    )
    GOTO end
    :nowork
    echo Didn't find matching string %PROPKEY% in %FILE%. No work to do.
    pause
    :end

DEVICE2.bat：

@echo off
        :: script for updating property files
        SETLOCAL EnableExtensions
        SETLOCAL EnableDelayedExpansion
        if "%3"=="" (
          ECHO Script will optionally accept 3 args: PropKey PropVal File
          SET PROPKEY=Deviceid
          SET PROPVAL=dfs2341f
::changed config.properties to config2.properties
          SET FILE=config2.properties
        ) ELSE (
          SET PROPKEY=%1
          SET PROPVAL=%2
          SET FILE=%3
        )
        FINDSTR /B %PROPKEY% %FILE% >nul
        IF %ERRORLEVEL% EQU 1 GOTO nowork
        MOVE /Y "%FILE%" "%FILE%.bak"
        FOR /F "USEBACKQ tokens=*" %%A IN (`TYPE "%FILE%.bak" ^|FIND /N /I "%PROPKEY%"`) DO (
          SET LINE=%%A
        )
        FOR /F "tokens=1,2* delims=]" %%S in ("%LINE%") DO SET LINE=%%S
        SET /A LINE=%LINE:~1,6%
        SET /A COUNT=1
        FOR /F "USEBACKQ tokens=*" %%A IN (`FIND /V "" ^<"%FILE%.bak"`) DO (
          IF "!COUNT!" NEQ "%LINE%" (
              ECHO %%A>>"%FILE%"
          ) ELSE (
              ECHO %PROPKEY%=%PROPVAL%>>"%FILE%"
              ECHO Updated %FILE% with value %PROPKEY%=%PROPVAL%
          )
          SET /A COUNT+=1
        )
        GOTO end
        :nowork
        echo Didn't find matching string %PROPKEY% in %FILE%. No work to do.
        pause
::delete the temporary config2.properties
del /f /q config2.properties
        :end

希望有所帮助！

该进程无法访问该文件，因为它正由另一个进程使用。（批处理文件）

1 个答案: