[Python]Python3调用java代码

环境：Ubuntu16.04 桌面版

Ubuntu安装java的详细教程：https://www.cnblogs.com/ttkl/p/11933884.html

安装JPype1

pip3 install JPype1

1、java文件编译成class文件

javac -encoding UTF-8 -Djava.ext.dirs=/(*.jar) *.java

2、打包class文件

jar cvf *.jar *.class

示例代码：

# -*- coding:utf-8 -*-
from jpype import *
import os

# 启动Java环境
startJVM("/opt/java/jdk1.8.0_231/jre/lib/amd64/server/libjvm.so", "-ea", \
         "-Djava.class.path=%s" % ("*.jar"), "-Djava.ext.dirs=%s" % （"../jar/(*.jar)"）)

# 加载自定义的Java Class
JClass = JClass("HmacUtil")
jc = JClass()

# 调用HmacUtil类中的main()方法获取sign
try:
    sign = jc.main()
except Exception as e:
    print(e)

print(sign)

# 关闭Java环境
shutdownJVM()