用Java中的ProcessBuilder读取输出git-bash

Question

在使用ProcessBuilder的Java应用程序中，我无法读取在git bash中运行的git命令的输出。

OS：Windows 8.1---IDE：IntelliJ

cd C:/Users/Utente/Documents/Repository-SVN-Git/Bookkeeper && git ls-files | grep .java | wc -l

Result in git-bash :
 2140
Result in IntelliJ :
 --- Command run successfully
 --- Output=

public class SelectMetrics {

public static final String path_bash = "C:/Program Files/Git/git-bash.exe";    
public static final String path_repository = "cd C:/Users/Utente/Documents/Bookkeeper";        
public static final String git_command = "git ls-files | grep .java | wc -l";        
public static final String command_pipe = path_repository + " && " + git_command;

public static void main(String[] args) {       
    runCommandPIPE(command_pipe);
}

public static void runCommandPIPE(String command) {
    try {
        ProcessBuilder processBuilder = new ProcessBuilder();
        processBuilder.command(path_bash, "-c", command);

        Process process = processBuilder.start();
        StringBuilder output = new StringBuilder();
        BufferedReader reader = new BufferedReader(
          new InputStreamReader(process.getInputStream()));

        String line;
        while ((line = reader.readLine()) != null) {
            output.append(line + "\n");
        }
        int exitVal = process.waitFor();
        if (exitVal == 0) {
            System.out.println(" --- Command run successfully");
            System.out.println(" --- Output=" + output);
        } else {
            System.out.println(" --- Command run unsuccessfully");
        }
    } catch (IOException | InterruptedException e) {
        System.out.println(" --- Interruption in RunCommand: " + e);
        // Restore interrupted state
        Thread.currentThread().interrupt();
    }
}
  
}

使用processBuilder打开git bash并在其中执行命令

但是，我仍然不明白为什么不能用ProcessBuilder读取输出

Answer 1

问题应该在使用

C:/Program Files/Git/git-bash.exe

因为它打开了用户用于工作的窗口，但在java应用程序的运行时，您应该使用

C:/Program Files/Git/bin/bash.exe

这样，ProcessBuilder就可以读取git操作的结果。

ProcessBuilder无法从git-bash.exe窗口读取，正确的做法是读取的结果为NULL。如果在运行时在git-bash.exe中运行命令，结果将只显示在窗口git-bash.exe中，java应用程序无法读取它。

public static final String path_bash = "C:/Program Files/Git/bin/bash.exe";

然后

Result in git-bash :
2183
Result in IntelliJ :
 --- Command run successfully
 --- Output=2183