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這篇文章主要講解了Python基于pyjnius庫實現訪問java類的方法，內容清晰明了，對此有興趣的小伙伴可以學習一下，相信大家閱讀完之后會有幫助。
簡介
Pyjnius是一個用于訪問Java類的Python庫。
適用場景：極個別的加密算法等內容，用python不方便實現或者實現較耗時，可基于Pyjnius把java類當做python庫使用。
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/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環境變量或者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 需要利用原來保存的clone。
快速入門
hello world 實例：
#!/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')堆棧實例：
#!/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'調用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())調用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*/測試：
#!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加載CLASSPATH環境變量。
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'
``
`
封裝某模塊的加密機制為python包實例：
* 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 *
測試代碼：
`
``
python
# - * -coding: utf - 8 - * -
#注意要先把jar加載CLASSPATH環境變量。
from jnius
import autoclass
AESUtil = autoclass(
'com.oppo.sso.util.AESUtil')
email = AESUtil.aesEncrypt(
"hello@126.com", "我是一個加密密鑰")
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加載CLASSPATH環境變量。
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'
``
`
封裝某模塊的加密機制為python包實例：
* 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 *
測試代碼：
`
``
python
# - * -coding: utf - 8 - * -
#注意要先把jar加載CLASSPATH環境變量。
from jnius
import autoclass
AESUtil = autoclass(
'com.oppo.sso.util.AESUtil')
email = AESUtil.aesEncrypt(
"hello@126.com", "我是一個加密密鑰")
print(email)看完上述內容，是不是對Python基于pyjnius庫實現訪問java類的方法有進一步的了解，如果還想學習更多內容，歡迎關注億速云行業資訊頻道。
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