Python与Java进行相互操作与调用的解决方案大全

wget https://www.jython.org/downloads/jython-installer-2.7.2.jar
java -jar jython-installer-2.7.2.jar

from java.util import ArrayList

list_obj = ArrayList()
list_obj.add("Hello")
list_obj.add("World")

for item in list_obj:
    print(item)

import org.python.util.PythonInterpreter;

public class JythonExample {
    public static void main(String[] args) {
        PythonInterpreter interpreter = new PythonInterpreter();
        interpreter.exec("print('Hello from Python!')");
    }
}

pip install jpype1

import jpype
import jpype.imports

# 启动JVM
jpype.startJVM(classpath=["myjava.jar"])

from java.lang import System
System.out.println("Hello from Java!")

jpype.shutdownJVM()

pip install py4j

import py4j.GatewayServer;

public class JavaApp {
    public String hello(String name) {
        return "Hello, " + name;
    }

    public static void main(String[] args) {
        JavaApp app = new JavaApp();
        GatewayServer server = new GatewayServer(app);
        server.start();
    }
}

from py4j.java_gateway import JavaGateway

gateway = JavaGateway()
java_app = gateway.entry_point
print(java_app.hello("Python"))

pip install jep

import jep.Interpreter;
import jep.SharedInterpreter;

public class JepExample {
    public static void main(String[] args) {
        try (Interpreter interp = new SharedInterpreter()) {
            interp.exec("print('Hello from Python!')");
        }
    }
}

syntax = "proto3";
service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply);
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
}

import grpc
from concurrent import futures
import hello_pb2
import hello_pb2_grpc

class GreeterServicer(hello_pb2_grpc.GreeterServicer):
    def SayHello(self, request, context):
        return hello_pb2.HelloReply(message=f"Hello, {request.name}!")

def serve():
    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
    hello_pb2_grpc.add_GreeterServicer_to_server(GreeterServicer(), server)
    server.add_insecure_port('[::]:50051')
    server.start()
    server.wait_for_termination()

import io.grpc.ManagedChannel;
import io.grpc.ManagedChannelBuilder;
import hello.GreeterGrpc;
import hello.HelloRequest;

public class GrpcClient {
    public static void main(String[] args) {
        ManagedChannel channel = ManagedChannelBuilder.forAddress("localhost", 50051).usePlaintext().build();
        GreeterGrpc.GreeterBlockingStub stub = GreeterGrpc.newBlockingStub(channel);
        HelloRequest request = HelloRequest.newBuilder().setName("Java").build();
        System.out.println(stub.sayHello(request).getMessage());
        channel.shutdown();
    }
}