在Python中实际使用Java类/ JAR？

我花了大量时间寻找这个问题,并探索了许多解决方案.

这与此线程有关.
Calling Java from Python

最后,经过测试：

Pyjnius：无法在Windows中安装.

Py4J：可以在Windows上安装,但是使用Gateway有点繁琐.

JPype：5分钟内安装了Python 3,可以加载50Mo JAR,没有任何问题.
    好消息是语法已与Python语法完全合并…
    https://github.com/tcalmant/jpype-py3

只是想知道,是否有人开发了具有大型JAR的Python(即在生产服务器上运行)的Java实际包装应用程序？

解决方法:

为了节省很多人的时间,我发布了用于JPype的模块,可以很好地加载JAR.

import jpype as jp; import numpy as np; import os as os
jarpath= r"D:\zjavajar\\"
mavenurl= r"http://mvnrepository.com/artifact/"



# StartJVM (add "-Xmx" option with 1024M if crash due to not enough memory )
def importJAR(path1="", path2="", path3="", path4=""):
   classpath = path1
   if path2 != "":  classpath = os.pathsep.join((classpath, path2))   
   if path3 != "":  classpath = os.pathsep.join((classpath, path3))
   if path4 != "":  classpath = os.pathsep.join((classpath, path4))        
   jp.startJVM(jp.getJVMPath(),"-ea", "-Djava.class.path=%s" % classpath)


def showLoadedClass(): #Code to see the JAR loaded.
   classloader = jp.java.lang.ClassLoader.getSystemClassLoader(); vv= []; 
   for x in classloader.getURLs():  vv.append(x.toString());         
   return vv


def loadSingleton(class1):  single= jp.JClass(class1);  return Single.getInstance()


def java_print(x):  jp.java.lang.System.out.println(x)   #Print in Java Console

标签：java,python,jar,jpype,pyjnius
来源： https://codeday.me/bug/20191012/1897961.html