从 python 编译 java

发布于 2024-11-29 05:03:20 字数 394 浏览 1 评论 0原文

我正在编写一个脚本来从 python 中编译 .java 文件但错误

import subprocess
def compile_java(java_file):
    cmd = 'javac ' + java_file 
    proc = subprocess.Popen(cmd, shell=True)

compile_java("Test.java")

错误：

javac is not recognized as an internal or external command windows 7

我知道如何解决 Windows 上的 CMD 问题。但是对于python我该如何解决呢？我的意思是：我如何设置路径？

原文

I'm writing a script to compile a .java file from within python
But the error

import subprocess
def compile_java(java_file):
    cmd = 'javac ' + java_file 
    proc = subprocess.Popen(cmd, shell=True)

compile_java("Test.java")

Error:

javac is not recognized as an internal or external command windows 7

I know how to fix the problem for CMD on windows. But how do I solve it for python?
What I mean is: how do i set the path?

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梦回梦里 2024-12-06 05:03:20

proc = subprocess.Popen(cmd, shell=True, env = {'PATH': '/path/to/javac'})

或者

cmd = '/path/to/javac/javac ' + java_file 
proc = subprocess.Popen(cmd, shell=True)

proc = subprocess.Popen(cmd, shell=True, env = {'PATH': '/path/to/javac'})

cmd = '/path/to/javac/javac ' + java_file 
proc = subprocess.Popen(cmd, shell=True)

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眼眸印温柔 2024-12-06 05:03:20

您还可以发送参数：

            variableNamePython = subprocess.Popen(["java", "-jar", "lib/JavaTest.jar", variable1, variable2, variable3], stdout=subprocess.PIPE)
            JavaVariableReturned = variableNamePython.stdout.read()
            print "The Variable Returned by Java is: " + JavaVariableReturned

接收这些变量的 Java 代码如下所示：

public class JavaTest {
    public static void main(String[] args) throws Exception {
        String variable1 = args[0];
        String variable2 = args[1];
        String variable3 = args[2];

You can also send arguments as well:

            variableNamePython = subprocess.Popen(["java", "-jar", "lib/JavaTest.jar", variable1, variable2, variable3], stdout=subprocess.PIPE)
            JavaVariableReturned = variableNamePython.stdout.read()
            print "The Variable Returned by Java is: " + JavaVariableReturned

The Java code to receive these variables will look like:

public class JavaTest {
    public static void main(String[] args) throws Exception {
        String variable1 = args[0];
        String variable2 = args[1];
        String variable3 = args[2];

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