1

pip3 install JPype1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

import jpype

#jar绝对包路径

jar_path = '/Users/qinhaili/Desktop/MathUtil.jar'

print(jar_path)

#获取默认的 JVM 路径

jvmPath = jpype.getDefaultJVMPath()

#启动 JAVA 虚拟机

jpype.startJVM(jvmPath,"-ea",f"-Djava.class.path={jar_path}")

#环境测试代码,#成功输出说明安装环境成功

jpype.java.lang.System.out.println( "hello world!" )

#获取java类

java_class = jpype.JClass('MathUtil')

#类调用静态方法(类.方法名())

result1 = java_class.sayHello()

print(result1)

#调用对象方法(类实例.方法名())

#实话java类

class_obj = java_class()

result2 = class_obj.add(1,2)

print(result2)

#关闭JAVA虚拟机

jpype.shutdownJVM()

1

2

3

4

5

6

7

8

9

10

11

12

13

14

class MathUtil{

    public static String sayHello() {

        return "Hello How are you";

    }

    public MathUtil() {

    }

    public int add(int a, int b) {

        return a + b;

    }

}

1

javac Hello.java

1

jar cf xxxx.jar xxx.class

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

import subprocess

java_path = "/usr/bin/java"  # Java 的路径

jar_path = "path/to/your/jar/file.jar"  # jar 包的路径

# 要执行的命令

cmd = [java_path, "-jar", jar_path]

# 执行

proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

out, err = proc.communicate()

# 打印输出和错误

print(out.decode("utf-8"))

print(err.decode("utf-8"))

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

from java.lang import Runtime

jar_path = "path/to/your/jar/file.jar"  # jar 包的路径

# 获取当前 JVM 实例

jvm = Runtime.getRuntime()

# 加载 jar 包

jvm.load(jar_path)

# 调用 jar 包中的方法

result = jvm.callMethod("com.example.YourClass", "yourMethod", arg1, arg2)

# 打印结果

print(result)