[Python知识库]python调用Java代码

• 第一步　把Java代码打成jar包

• 第二步 安装python 模块 jpype ，安装方法 如下：

  pip install JPype1
  

• 第三步 写代码，代码我以封装，如下

  import jpype
  from jpype._core import startJVM, shutdownJVM
  from jpype._jvmfinder import getDefaultJVMPath
  
  class AES(object):
  
      def __init__(self,jarpath,classname):
          """
          :param jarpath: jar 包的位置
          :param classname: 报名.类名
          """
          startJVM(getDefaultJVMPath(), "-ea", "-Djava.class.path=%s" % jarpath)
          # 创建对象
          JDClass = jpype.JClass(classname)
          # 实例化对象
          self.aes = JDClass()
  
      def encrypt(self,string,key):
          """aes 加密"""
          return self.aes.encrypt(string,key)
  
      def decrypt(self,string,key):
          """aes解密"""
          return self.aes.decrypt(string,key)
      def close_jvm(self):
          """关掉java虚拟机"""
          shutdownJVM()
  

• 调用方法如下：

  if __name__ == '__main__':
      aes = AES("encryptdecrypt.jar","TEST.ENCRYPT")
      string = "hell0world"
      key = '6666'
      print(aes.encrypt(string,key))
  
      try:
          print(aes.decrypt("sdDyvlgwwUt89ENom6R4pA==",key))
      except Exception as e:
          print(e)
      finally:
          # 关闭虚拟机
          aes.close_jvm()