java - 将 .bat 文件中的值返回给调用应用程序

Question

我使用以下代码来执行 .bat 文件并读取响应。

java.lang.ProcessBuilder pb = new ProcessBuilder("cmd.exe", "/C", "C:\\main.bat");
    java.lang.Process p = pb.start();            
    String line;
    BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
    while ((line = r.readLine()) != null) {
        System.out.println(line); <--this works
    }
    r.close();
}
}

main.bat 只会回显该值

call sample.bat c:\sample.txt value1
echo %value1% <---this works

但是现在我想从java代码传递一个参数，该参数将在批处理文件中设置并可以在java代码中打印。

java.lang.ProcessBuilder pb = new ProcessBuilder("cmd.exe", "/C", "C:\\main.bat" +s1);
java.lang.Process p = pb.start(); 
System.out.println(s1); <--- this does not work

有人可以告诉我如何将 .bat 文件中的值返回到任何调用应用程序吗？

Answer 1

请尝试以下代码

第 1 步:创建新类 CommandStreamReader

        import java.io.BufferedReader;
        import java.io.IOException;
        import java.io.InputStream;
        import java.io.InputStreamReader;
        class CommandStreamReader extends Thread
        {
            InputStream is;
            String type;

            CommandStreamReader(InputStream is, String type)
            {
                this.is = is;
                this.type = type;
            }

            public void run()
            {
                try
                {
                    InputStreamReader isr = new InputStreamReader(is);
                    BufferedReader br = new BufferedReader(isr);
                    String line=null;
                    while ( (line = br.readLine()) != null)
                        System.out.println(type + ">" + line);    
                    } catch (IOException ioe)
                      {
                        ioe.printStackTrace();  
                      }
            }
        }

第 2 步:使用您的内容在 C 目录中创建 main.bat 文件，例如

回声桑托什辛德

第 3 步:创建新类 CmdTest

        public class CmdTest { 
            public static void main(String[] args) throws Exception {
            try{
                        String[] cmd = new String[3];
                        cmd[0] = "cmd.exe" ;
                        cmd[1] = "/C" ;
                        cmd[2] = "C:/main.bat";
                        Runtime rt = Runtime.getRuntime();
                        System.out.println("Execing " + cmd[0] + " " + cmd[1]  + " " + cmd[2]);
                        Process proc = rt.exec(cmd);
                        // any error message?
                        CommandStreamReader errorStream = new CommandStreamReader(proc.getErrorStream(), "ERROR");            

                        // any output? Here We take return or output value from bach file
                        CommandStreamReader outputStream = new CommandStreamReader(proc.getInputStream(), "OUTPUT");

                        // kick them off
                        errorStream.start();
                        outputStream.start();

                        // any error???
                        int exitVal = proc.waitFor();
                        System.out.println("ExitValue: " + exitVal);   

                    } catch(Throwable t){
                        t.printStackTrace();
                }  
            }

            }
        }

第 4 步:输出

  Execing cmd.exe /C F:/main.bat
  OUTPUT>
  OUTPUT>C:\Users\Admin\workspace\BuilAPKAnt>echo santosh 
  OUTPUT>santosh shinde
  ExitValue: 0