2018-11-26 python调用jar包模块

import jpype
import os
from platform import system
from utils.config import LIB_PATH


def get_jars():
    # 此方法获取LIB_PATH下所有jar包并拼成字符串返回
    jars = list()
    for root, dirs, files in os.walk(LIB_PATH):
        for f in files:
            if os.path.splitext(f)[1] == '.jar':
                jars.append(os.path.join(LIB_PATH, f))
    sep = ';' if system() == 'Windows' else ':'
    return sep.join(jars)


class JVM(object):
    @staticmethod
    def start_jvm(jar_path=None):
        if not jpype.isJVMStarted():
            # 如果没有传入jar包路径，则使用默认路径，添加LIB_PATH下所有jar包
            if not jar_path:
                jar_path = get_jars()
            # 获取虚拟机地址
            jvm_path = jpype.getDefaultJVMPath()
            # 使用jvm调jar包，jar包传入相对路径
            jpype.startJVM(jvm_path, "-ea", "-Djava.class.path=" + jar_path)

    @staticmethod
    def shutdown_jvm():
        jpype.shutdownJVM()


if __name__ == '__main__':
    j = get_jars()
    # print(j)
    JVM().start_jvm()
    jpype.JClass('SimpleStringCypher')