python工具庫介紹-pyjnius：訪問java類
摘要：
簡介
Pyjnius是一個用於訪問Java類的Python庫。
適用場景：極個別的加密演算法等內容，用python不方便實現或者實現較耗時，可基於Pyjnius把java類當做python庫使用。
文件：http...
簡介
適用場景：極個別的加密演算法等內容，用python不方便實現或者實現較耗時，可基於Pyjnius把java類當做python庫使用。
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文件：ofollow,noindex">http://pyjnius.readthedocs.io/en/latest/installation.html
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下載地址：https://pypi.python.org/pypi?%3Aaction=search&term=jnius&submit=search
注意jnius的版本管理有點混亂，目前看來選擇jniusx 比較好。
安裝
先安裝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 in /opt/python3.5/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安裝的坑比較多，請參考http://stackoverflow.com/search?q=jnius
如果出現ImportError，一般是java環境變數或者path沒有配置好。
jnius/jnius.c:4:20: fatal error: Python.h 一般為缺python-dev, yum -y install python-devel
pip 安裝不成功可以嘗試setup.py方式。
jnius/jnius.c: No such file or directory 需要利用原來儲存的clone。
快速入門
hello world 例項：
#!/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')
堆疊例項：
#!/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'
呼叫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())
呼叫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
測試：
#!python
# ipython
Python 3.5.2 (default, Nov7 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載入CLASSPATH環境變數。
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'
```
封裝某模組的加密機制為python包例項：
* 拷貝： com cn org 到新建的臨時目錄
* echo Main-Class: AESUtil >manifest.txt
* jar cvfm Test.jar manifest.txt *
測試程式碼：
```python
# -*- coding: utf-8 -*-
# 注意要先把jar載入CLASSPATH環境變數。
from jnius import autoclass
AESUtil = autoclass('com.oppo.sso.util.AESUtil')
email = AESUtil.aesEncrypt("[email protected]","我是一個加密金鑰")
print(email)
注意：以上打包方式和具體環境很相關，建議儘量本機打包，本機執行。