Python基于pyjnius库实现访问java类

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：

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：

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://*.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(
	"[e-mail]", "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(
	"[e-mail]", "我是一个加密密钥")
print(email)

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