jpype2

Posted 2020-11-30 zhangzhaolin

# -*- coding: utf-8 -*-
# @Time : 2020/5/21 0:04
# 从环境变量获取jvm虚拟机安装路径，若为None则获取默认路径
import os

import jpype
from jpype import *
e = jpype.getDefaultJVMPath()
print(e)
p = "-Djava.class.path=F:\codeTools\apache-jmeter-3.1\main.jar"
jpype.startJVM(e,p, **{"convertStrings": False})
# jpype.startJVM(e,p)

jpype.java.lang.System.out.println("helloworld")
jpype.java.lang.System.out.println("222")
javaClass = jpype.JClass(‘test.test03.Test‘)
javaInstance = javaClass()
# try {Test test = new Test();
#             String s = test.CopyFile("d://1.txt","d://3.txt");
#         } catch (IOException e) {
#             e.printStackTrace();
#         }
try:

  s = javaInstance.CopyFile("d://1.txt", "d://5.txt")
  print(s)
except Exception as e:
    print("ERROR")
    pass
# jvm_path = ‘‘
# if "JVM_PATH" in os.environ:
#     jvm_path = os.environ["JVM_PATH"]
#     print(jvm_path)
# else:
#     jvm_path = jpype.getDefaultJVMPath()
# # 从环境变量获取Jar包路径，若为None则获取默认路径
# jar_path = ‘‘
# if "Jar_Path" in os.environ:
#     jar_path = os.environ["Jar_Path"]
# else:
#     # 获取当前的绝对路径
#     jar_path = os.path.abspath(‘.‘)
#
#     # 加载jar包
#     jpype.startJVM(jvm_path, "-ea", "-Djava.class.path=%s" % (jar_path + ‘/Formula.jar‘))
#
# # 指定jar包的main class
# JDClass = jpype.JClass("com.xxx.formula.Calculator")
# # 创建类实例对象
# jd = JDClass()

‘‘‘
# 引用jar包类中的方法 execute，参数一是表达式，参数二是自变量x的值, cost_value应为70
cost_value = jd.execute(‘58+2*x‘, 6)   
‘‘‘

# 关闭Java虚拟机，不写的话JVM会随程序执行完自动关闭
jpype.shutdownJVM()