Java 执行终端命令实现，调用执行另外一个Java文件-优快云博客

本文介绍了一个Java程序内部实现编译和运行另一个Java程序的示例。通过使用Runtime类执行外部命令，该程序能够编译并运行Test.java文件，并捕获输出结果。

Test.java

package com.journaldev.files;
 
public class Test {
 
    public static void main(String[] args) {
        System.out.println("Start");
        for(String str : args){
            System.out.println(str);
        }
 
    }
 
}

CompileRunJavaProgram.java

package com.journaldev.files;
 
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
 
public class CompileRunJavaProgram {
 
    public static void main(String[] args) {
        try {
            runProcess("pwd");
            System.out.println("**********");
            runProcess("javac -cp src src/com/journaldev/files/Test.java");
            System.out.println("**********");
            runProcess("java -cp src com/journaldev/files/Test Hi Pankaj");
        } catch (Exception e) {
            e.printStackTrace();
        }
         
    }
 
    private static void printLines(String cmd, InputStream ins) throws Exception {
        String line = null;
        BufferedReader in = new BufferedReader(
            new InputStreamReader(ins));
        while ((line = in.readLine()) != null) {
            System.out.println(cmd + " " + line);
        }
      }
 
      private static void runProcess(String command) throws Exception {
        Process pro = Runtime.getRuntime().exec(command);
        printLines(command + " stdout:", pro.getInputStream());
        printLines(command + " stderr:", pro.getErrorStream());
        pro.waitFor();
        System.out.println(command + " exitValue() " + pro.exitValue());
      }
 
}

运行结果：

pwd stdout: /Users/pankaj/CODE/JavaPrograms
pwd exitValue() 0
**********
javac -cp src src/com/journaldev/files/Test.java exitValue() 0
**********
java -cp src com/journaldev/files/Test Hi Pankaj stdout: Start
java -cp src com/journaldev/files/Test Hi Pankaj stdout: Hi
java -cp src com/journaldev/files/Test Hi Pankaj stdout: Pankaj
java -cp src com/journaldev/files/Test Hi Pankaj exitValue() 0

转自：http://www.journaldev.com/937/how-to-compile-and-run-java-program-in-another-java-program

转载于:https://www.cnblogs.com/spring87/p/6070471.html