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。

文档：http://pyjnius.readthedocs.io/en/latest/installation.html

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。

git地址：https://github.com/kivy/pyjnius/blob/master/docs/source/index.rst

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/python

3.5 / lib / python3.5 / site - packages(

from jniusx)

Requirement already satisfied: cython in

/opt/python

3.5 / lib / python3.5 / site - packages(

from 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：

#!/usr/bin/env python

#- * -coding: utf - 8 - * -

#jnius_quick1.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

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

#!/usr/bin/env python

#- * -coding: utf - 8 - * -

#jnius_quick3.py

# Author Rongzhong Xu 2016 - 08 - 02 wechat:

pythontesting

# https: //bitbucket.org/china-testing/python-chinese-library/src

""

"

jnius demo: Call java String 's hashCode

Tested in python2.7

""

"

from jnius

import 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() {

return 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：

#!python

#

ipython

Python 3.5.2(

default, Nov 7 2016, 18: 53: 51)

Type "copyright", "credits"

or "license"

for more information.

IPython 5.1.0--An enhanced Interactive Python

.

? - > Introduction and overview of IPython

's features.

% quickref - > Quick reference.

help - > Python 's own help system.

object ? - > Details about 'object',

use 'object??'

for extra details.

In[2]: #注意要先把jar加载CLASSPATH环境变量。

In[3]: from jnius

import autoclass

In[4]: Bla = autoclass(

'com.sample.Beach')

In[5]: s = Bla("Tom", "Shenzhen")

In[6]: s.getName()

Out[6]: 'Tom'

``

`

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

# - * -coding: utf - 8 - * -

#注意要先把jar加载CLASSPATH环境变量。

from jnius

import autoclass

AESUtil = autoclass(

'com.oppo.sso.util.AESUtil')

email = AESUtil.aesEncrypt(

"hello@126.com", "我是一个加密密钥")

print(email)# !python

# ipython

Python 3.5.2(

default, Nov 7 2016, 18: 53: 51)

Type "copyright", "credits"

or "license"

for more information.

IPython 5.1.0--An enhanced Interactive Python

.

? - > Introduction and overview of IPython

's features.

% quickref - > Quick reference.

help - > Python 's own help system.

object ? - > Details about 'object',

use 'object??'

for extra details.

In[2]: #注意要先把jar加载CLASSPATH环境变量。

In[3]: from jnius

import autoclass

In[4]: Bla = autoclass(

'com.sample.Beach')

In[5]: s = Bla("Tom", "Shenzhen")

In[6]: s.getName()

Out[6]: 'Tom'

``

`

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

# - * -coding: utf - 8 - * -

#注意要先把jar加载CLASSPATH环境变量。

from jnius

import autoclass

AESUtil = autoclass(

'com.oppo.sso.util.AESUtil')

email = AESUtil.aesEncrypt(

"hello@126.com", "我是一个加密密钥")

print(email)

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本文标题: Python基于pyjnius库实现访问java类

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