使用Php exec函数在Azure上运行jar文件

Question

I will give some background first. I have three files: test.php, test.txt, myJar.jar . Here are the code inside each of them

test.php:

<?php
exec("java -cp myJar.jar Hello test.txt", $o);
print_r($o);
?>

the actual code that was used to make the myJar.jar file:

import java.io.*;
public class Hello
{
    public static void main(String[] args) throws Exception
    {
        FileReader file = new FileReader(args[0]);
        BufferedReader reader = new BufferedReader(file);
        String line = reader.readLine();
        while (line != null)
        {
            System.out.println(line);
            line = reader.readLine();
        }
    }
}

test.txt:

hello hello dinosir
this is a test
testing to the extreme
adding more crap here
and here

now I put these files in htdocs and run localhost/test.php using chrome I get:

Perfect exactly what I wanted. The problem is when I upload these files to github and link it to a website on azure, I go to the website but I only see Array(). I assume its because Azure doesnt have jre to run the "java -cp myJar.jar Hello test.txt" command. Any idea on how I could install/enable jre on azure to make the test.php run the same way as on my localhost

Answer 1

Have you checked your website configurations? Make sure that Java isn't set to "off" (the default)

Answer 2

The only way to make this work in Azure as PHP app is to create .bat file. Just like this:

example.bat should contain folowing:

set PATH=%PATH%;%JAVA_HOME%/bin
java -jar %~dp0java-file.jar %*

Its important to realize that the only thing you should change is java-file.jar and it needs to be wrapped with %~dp0 and %* .

Then execute .bat file with php :

exec("example.bat", $output);

Thats it. Works for me.