Java exec executeCommand(final ProcessBuilder pb)

Description

execute Command

License

Open Source License

Declaration

public static String executeCommand(final ProcessBuilder pb) 

Method Source Code

//package com.java2s;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static String executeCommand(final ProcessBuilder pb) {

        final StringBuffer output = new StringBuffer();

        Process p;/*from ww  w. java 2 s  .  c om*/
        try {
            // System.out.println("Before start");
            p = pb.start();
            // System.out.println("after start");
            // p.waitFor(); // not work for dir, not work sometimes for all
            // commands, never comes back
            // System.out.println("after waitFor");
            final BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
            /*
            String line = reader.readLine();
            while (line != null && line.length() > 0) {
            output.append(line + "\n");
            line = reader.readLine();
            }
            */

            String line = "";
            // System.out.println("Before read while");
            while ((line = reader.readLine()) != null) {
                output.append(line + "\n");
                // System.out.println("inside reade while");
                if (!reader.ready()) {
                    // System.out.println("inside not ready");
                    Thread.sleep(3000);
                    if (!reader.ready()) {
                        // System.out.println("not ready break");
                        break;
                    }

                    /*
                    if (p.exitValue() == 0) {
                    System.out.println("ready break");
                    break;
                    } else {
                    // reader.wait(3000);
                    if (!reader.ready()) {
                    System.out.println("not ready break");
                    break;
                    }
                    }*/
                }

            }
            final int i = p.exitValue();
            System.out.println("Retrun code: " + i);
            // if (i != 0)
            // throw new Exception("failed to call the CMD.");

        } catch (final Exception e) {
            e.printStackTrace();
        }

        System.out.println(output.toString());
        return output.toString();

    }

    public static String executeCommand(final Runtime r, final String command) {

        final StringBuffer output = new StringBuffer();

        Process p;
        try {
            System.out.println(command);
            p = r.exec("cmd /C " + command);
            // p.waitFor();//not work for dir

            final BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));

            String line = reader.readLine();
            while (line != null && line.length() > 0) {
                output.append(line + "\n");
                line = reader.readLine();
            }

            /*
            final BufferedReader readerErr =
            new BufferedReader(
                    new InputStreamReader(p.getErrorStream()));
                
            if (readerErr == null) {
            String lineErr = "";
            while ((lineErr = readerErr.readLine()) != null) {
            output.append(lineErr + "\n");
            }
            }
            */
        } catch (final Exception e) {
            e.printStackTrace();
        }

        return output.toString();

    }
}

Related

1. executeBatFile(String batFile)
2. executeCD(String dirPath)
3. executeCmdCommand(String command)
4. executeCmdForReader(String cmd)
5. executeComand(String[] comand)
6. executeCommand(final String cmd)
7. executeCommand(List cmdArray)
8. executeCommand(List command)
9. executeCommand(String cmd)