从Java代码运行Shell脚本

问题描述

试图解决这个问题，我几乎死了.有人可以帮忙吗...

I am almost dead trying to sort this out.. Can someone help... please?

下面是代码:

import java.io.*;
import java.lang.Runtime;
import java.util.*;

public class WORKBRO {

    public static void main(String args[])
    {
        try
        {
            String target = new String("/home/dhirendra.panwar/Desktop/test.sh");
            Runtime rt = Runtime.getRuntime();
            Process proc = rt.exec(target);

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

推荐答案

您的代码正确，并且我确定您没有异常，如果使用proc.getErrorStream()进行读取，则不会有任何结果.
已经说过，现在命令是100％以这种方式执行，这是因为您正在回显某些内容，您需要使用BufferedReader读回它.

Your code is right and I am sure you are not getting exceptions, if you read using proc.getErrorStream() you will not get anything.
Commands 100% get executed that way, having said that now thing is that you are echo'ing something and you need to read it back using BufferedReader.

检查以下示例，该示例将成功创建一个名为"stackOverflow"的目录并打印您正在回显的内容.恐怕要将其放入日志文件中，恐怕可以使用>"来完成，您可能必须使用一些编辑器命令或使用Java创建文件.

Check below example which will successfully create a directory called "stackOverflow" and print what you are echo'ing. For the putting it into a log file I am afraid that you can do it using ">", you may have to use some editor command or create file using Java.

底线: Runtime.getRuntime().exec("command")是从Java执行Unix命令或脚本的正确且已定义的方法.

Bottom line: Runtime.getRuntime().exec("command") is the correct and defined way to execute Unix commands or scripts from Java and it WORKS.

test.sh

#!/bin/bash
echo "hola"
mkdir stackOverflow

Test.java

import java.io.*;
public class Test {

        public static void main(String[] args) throws Exception {
                try {
                        String target = new String("/home/hagrawal/test.sh");
// String target = new String("mkdir stackOver");
                        Runtime rt = Runtime.getRuntime();
                        Process proc = rt.exec(target);
                        proc.waitFor();
                        StringBuffer output = new StringBuffer();
                        BufferedReader reader = new BufferedReader(new InputStreamReader(proc.getInputStream()));
                        String line = "";
                        while ((line = reader.readLine())!= null) {
                                output.append(line + "\n");
                        }
                        System.out.println("### " + output);
                } catch (Throwable t) {
                        t.printStackTrace();
                }
        }
}

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