简介
Pyjnius是一个用于访问Java类的Python库。
适用场景:极个别的加密算法等内容,用python不方便实现或者实现较耗时,可基于Pyjnius把java类当做python库使用。
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文档:http://pyjnius.readthedocs.io/en/latest/installation.html
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下载地址:https://pypi.python.org/pypi?%3Aaction=search&term=jnius&submit=search
注意jnius的版本管理有点混乱,目前看来选择jniusx比较好。
安装
先安装Java JDK 和JRE、Cython
# pip3 install cython pip3 install jniusx Collecting jniusx Downloading jniusx-1.0.5.tar.gz Requirement already satisfied: six>=1.7.0 in /opt/python3.5/lib/python3.5/site-packages (from jniusx) Requirement already satisfied: cython jniusx) Installing collected packages: jniusx Running setup.py install for jniusx ... done Successfully installed jniusx-1.0.5
注意:jnius安装的坑比较多,请参考http://stackoverflow.com/search?q=jnius
如果出现ImportError,一般是java环境变量或者path没有配置好。
jnius/jnius.c:4:20: fatal error: Python.h 一般为缺python-dev,yum -y install python-devel
pip 安装不成功可以尝试 setup.py方式。
jnius/jnius.c: No such file or directory 需要利用原来保存的clone。
快速入门
hello world 实例:
!/usr/bin/env python -*- coding: utf-8 -*- jnius_quick2.py Author Rongzhong Xu 2016-08-02 wechat: pythontesting https://bitbucket.org/china-testing/python-chinese-library/src """ jnius demo Tested in python2.7 """ from jnius import autoclass System = autoclass('java.lang.System') System.out.println(Hello World')
堆栈实例:
jnius_quick1.py autoclass Stack = autoclass(java.util.Stack) stack = Stack() stack.push(hello) stack.push(world) print(stack.pop()) --> 'world' print(stack.pop()) --> 'hello'
调用java String的hashCode
jnius_quick3.py jnius demo: Call java String's hashCode Tested in python2.7 autoclass String = autoclass(java.lang.String) print(String("hello").hashCode())
调用jar包
!python vi com/sample/Beach.java package com.sample; public class Beach { private String name; private String city; public Beach(String name,String city){ this.name = name; this.city = city; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getCity() { city; } public void setCity(String city) { this.city = city; } } echo Main-Class: Beach >manifest.txt jar cvfm Test.jar manifest.txt com/sample/*.class
测试:
ipython Python 3.5.2 (default,Nov 7 2016,18:53:51) Type "copyright",credits" or license more information. IPython 5.1.0 -- An enhanced Interactive Python. ? -> Introduction and overview of IPythons features. %quickref -> Quick reference. help -> Pythons own help system. object? -> Details about object',use object??' extra details. In [2]: 注意要先把jar加载CLASSPATH环境变量。 In [3]: autoclass In [4]: Bla = autoclass(com.sample.Beach) In [5]: s = Bla(TomShenzhen") In [6]: s.getName() Out[6]: ``` 封装某模块的加密机制为python包实例: * 拷贝: com cn org 到新建的临时目录 * echo Main-Class: AESUtil >manifest.txt * jar cvfm Test.jar manifest.txt * 测试代码: ```python 注意要先把jar加载CLASSPATH环境变量。 autoclass AESUtil = autoclass(com.oppo.sso.util.AESUtil) email = AESUtil.aesEncrypt(hello@126.com我是一个加密密钥print(email)
注意:以上打包方式和具体环境很相关,建议尽量本机打包,本机执行。