Question

我正在编写一个脚本来编译python中的.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。但是我如何为python解决它？我的意思是：我如何设置路径？

Answer 1

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

或

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

Answer 2

您也可以发送参数：

            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];

从python编译java

2 个答案: