{"id":1039399,"date":"2024-12-31T12:32:02","date_gmt":"2024-12-31T04:32:02","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1039399.html"},"modified":"2024-12-31T12:32:04","modified_gmt":"2024-12-31T04:32:04","slug":"sjava%e5%92%8cpython%e5%a6%82%e4%bd%95%e4%b8%80%e8%b5%b7%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1039399.html","title":{"rendered":"sjava\u548cpython\u5982\u4f55\u4e00\u8d77\u4f7f\u7528"},"content":{"rendered":"

\"sjava\u548cpython\u5982\u4f55\u4e00\u8d77\u4f7f\u7528\"<\/p>\n

JAVA\u548cPYTHON\u5982\u4f55\u4e00\u8d77\u4f7f\u7528<\/h3>\n<\/p>\n

Java\u548cPython\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u4e00\u8d77\u4f7f\u7528\uff0c\u5305\u62ec\u4f7f\u7528Java\u8c03\u7528Python\u811a\u672c\u3001\u4f7f\u7528Python\u8c03\u7528Java\u7a0b\u5e8f\u3001\u4f7f\u7528\u8de8\u8bed\u8a00\u5de5\u5177\u5982Jython\u3001Py4J\u548cJPype\u7b49\uff0c\u5177\u4f53\u5e94\u7528\u9700\u8981\u6839\u636e\u9879\u76ee\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6848\u3002<\/strong>\u5176\u4e2d\uff0c\u8de8\u8bed\u8a00\u5de5\u5177<\/strong>\u662f\u6700\u4e3a\u5e38\u7528\u4e14\u9ad8\u6548\u7684\u4e00\u79cd\u65b9\u5f0f\u3002\u6211\u4eec\u5c06\u91cd\u70b9\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u5de5\u5177\u6765\u5b9e\u73b0Java\u548cPython\u7684\u4e92\u64cd\u4f5c\u6027\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u8de8\u8bed\u8a00\u5de5\u5177<\/h3>\n<\/p>\n

1\u3001Jython<\/h4>\n<\/p>\n

Jython<\/strong>\u662f\u4e00\u4e2a\u5c06Python\u89e3\u91ca\u5668\u5b8c\u5168\u7528Java\u5b9e\u73b0\u7684\u9879\u76ee\uff0c\u8fd9\u610f\u5473\u7740\u4f60\u53ef\u4ee5\u5728Java\u7a0b\u5e8f\u4e2d\u76f4\u63a5\u8fd0\u884cPython\u4ee3\u7801\uff0c\u5e76\u4e14\u53ef\u4ee5\u65e0\u7f1d\u5730\u8c03\u7528Java\u7c7b\u548c\u5e93\u3002<\/p>\n<\/p>\n

\u5b89\u88c5\u548c\u4f7f\u7528Jython:<\/strong><\/p>\n<\/p>\n

    \n
  1. \u4e0b\u8f7dJython\u5b89\u88c5\u5305\u5e76\u5b89\u88c5\u3002<\/li>\n
  2. \u5728Java\u9879\u76ee\u4e2d\u5f15\u5165Jython\u5e93\u3002<\/li>\n
  3. \u7f16\u5199Java\u4ee3\u7801\u6765\u8c03\u7528Python\u811a\u672c\u3002<\/li>\n<\/ol>\n

    import org.python.util.PythonInterpreter;<\/p>\n
    public class JythonExample {<\/p>\n
        public static void mAI<\/a>n(String[] args) {<\/p>\n
            PythonInterpreter interpreter = new PythonInterpreter();<\/p>\n
            interpreter.exec("print('Hello from Python')");<\/p>\n
        }<\/p>\n
    }<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u8fd9\u79cd\u65b9\u5f0f\u9002\u5408\u9700\u8981\u9891\u7e41\u5728Java\u548cPython\u4e4b\u95f4\u8c03\u7528\u7684\u9879\u76ee\uff0c\u4f46\u9700\u8981\u6ce8\u610fJython\u5bf9Python 3\u7684\u652f\u6301\u6709\u9650\uff0c\u4e3b\u8981\u652f\u6301Python 2.7\u3002<\/p>\n<\/p>\n
    2\u3001Py4J<\/h4>\n<\/p>\n
    Py4J<\/strong>\u662f\u4e00\u4e2a\u4f7fPython\u7a0b\u5e8f\u80fd\u591f\u52a8\u6001\u5730\u8bbf\u95eeJava\u5bf9\u8c61\u7684\u5f00\u6e90\u9879\u76ee\u3002\u5b83\u5141\u8bb8Python\u4ee3\u7801\u8c03\u7528Java\u4ee3\u7801\uff0c\u5e76\u4e14Java\u4ee3\u7801\u53ef\u4ee5\u56de\u8c03Python\u4ee3\u7801\u3002<\/p>\n<\/p>\n
    \u5b89\u88c5\u548c\u4f7f\u7528Py4J:<\/strong><\/p>\n<\/p>\n
      \n
    1. \u5728Python\u9879\u76ee\u4e2d\u5b89\u88c5Py4J\u5e93\uff1apip install py4j<\/code><\/li>\n
    2. \u5728Java\u9879\u76ee\u4e2d\u5f15\u5165Py4J\u5e93\u3002<\/li>\n
    3. \u7f16\u5199Java\u4ee3\u7801\u548cPython\u4ee3\u7801\u6765\u8fdb\u884c\u4ea4\u4e92\u3002<\/li>\n<\/ol>\n
      Java\u4ee3\u7801:<\/strong><\/p>\n<\/p>\n
      from py4j.java_gateway import JavaGateway<\/p>\n
      gateway = JavaGateway()  # Connect to the JVM<\/p>\n
      java_object = gateway.jvm.java.lang.String("Hello from Java")<\/p>\n
      print(java_object)<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      Python\u4ee3\u7801:<\/strong><\/p>\n<\/p>\n
      from py4j.java_gateway import JavaGateway<\/p>\n
      gateway = JavaGateway()<\/p>\n
      java_object = gateway.jvm.java.lang.String("Hello from Java")<\/p>\n
      print(java_object)<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      Py4J\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u7684\u65b9\u5f0f\u6765\u8c03\u7528Java\u4ee3\u7801\uff0c\u4f46\u9700\u8981\u989d\u5916\u7684\u914d\u7f6e\u6765\u542f\u52a8\u548c\u7ba1\u7406Java Gateway\u3002<\/p>\n<\/p>\n
      3\u3001JPype<\/h4>\n<\/p>\n
      JPype<\/strong>\u662f\u4e00\u4e2a\u5141\u8bb8Python\u4ee3\u7801\u76f4\u63a5\u8c03\u7528Java\u4ee3\u7801\u7684\u9879\u76ee\uff0c\u901a\u8fc7JNI\uff08Java Native Interface\uff09\u5b9e\u73b0\u3002JPype\u7684\u6027\u80fd\u8f83\u597d\uff0c\u56e0\u4e3a\u5b83\u76f4\u63a5\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\u8c03\u7528\u3002<\/p>\n<\/p>\n
      \u5b89\u88c5\u548c\u4f7f\u7528JPype:<\/strong><\/p>\n<\/p>\n
        \n
      1. \u5728Python\u9879\u76ee\u4e2d\u5b89\u88c5JPype\u5e93\uff1apip install jpype1<\/code><\/li>\n
      2. \u7f16\u5199Python\u4ee3\u7801\u6765\u542f\u52a8JVM\u5e76\u8c03\u7528Java\u7c7b\u3002<\/li>\n<\/ol>\n
        import jpype<\/p>\n
        import jpype.imports<\/p>\n
        from jpype.types import *<\/p>\n
        Start the JVM<\/strong><\/h2>\n
        jpype.startJVM(classpath=['\/path\/to\/your.jar'])<\/p>\n
        Import Java classes<\/strong><\/h2>\n
        java_string = jpype.JClass('java.lang.String')<\/p>\n
        java_object = java_string("Hello from Java")<\/p>\n
        print(java_object)<\/p>\n
        Shutdown the JVM<\/strong><\/h2>\n
        jpype.shutdownJVM()<\/p>\n
        <\/code><\/pre>\n<\/p>\n
        JPype\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u6027\u80fd\u548c\u4f4e\u5ef6\u8fdf\u7684\u9879\u76ee\uff0c\u4f46\u9700\u8981\u786e\u4fddJVM\u5df2\u7ecf\u6b63\u786e\u914d\u7f6e\u548c\u542f\u52a8\u3002<\/p>\n<\/p>\n
        \u4e8c\u3001\u4f7f\u7528JNI\uff08Java Native Interface\uff09<\/h3>\n<\/p>\n
        JNI<\/strong>\u662fJava\u63d0\u4f9b\u7684\u4e00\u79cd\u7f16\u7a0b\u6846\u67b6\uff0c\u4f7fJava\u4ee3\u7801\u80fd\u591f\u4e0e\u672c\u5730\u5e94\u7528\u7a0b\u5e8f\u548c\u5e93\u8fdb\u884c\u4ea4\u4e92\u3002\u901a\u8fc7JNI\uff0c\u53ef\u4ee5\u8ba9Java\u4ee3\u7801\u8c03\u7528Python\u4ee3\u7801\uff0c\u5c3d\u7ba1\u8fd9\u79cd\u65b9\u6cd5\u53ef\u80fd\u4f1a\u66f4\u4e3a\u590d\u6742\u3002<\/p>\n<\/p>\n
        \u4f7f\u7528JNI\u7684\u6b65\u9aa4:<\/strong><\/p>\n<\/p>\n
          \n
        1. \u7f16\u5199Java\u4ee3\u7801\u5e76\u4f7f\u7528System.loadLibrary<\/code>\u52a0\u8f7d\u672c\u5730\u5e93\u3002<\/li>\n
        2. \u7f16\u5199C\/C++\u4ee3\u7801\u4f5c\u4e3a\u6865\u6881\uff0c\u5e76\u901a\u8fc7JNI\u8c03\u7528Python\u4ee3\u7801\u3002<\/li>\n
        3. \u4f7f\u7528javah<\/code>\u5de5\u5177\u751f\u6210\u5934\u6587\u4ef6\u3002<\/li>\n
        4. \u7f16\u8bd1C\/C++\u4ee3\u7801\u5e76\u751f\u6210\u52a8\u6001\u94fe\u63a5\u5e93\uff08DLL\u6216SO\uff09\u3002<\/li>\n
        5. \u8fd0\u884cJava\u7a0b\u5e8f\u3002<\/li>\n<\/ol>\n
          Java\u4ee3\u7801\u793a\u4f8b:<\/strong><\/p>\n<\/p>\n
          public class JNIDemo {<\/p>\n
              static {<\/p>\n
                  System.loadLibrary("native"); \/\/ Load native library at runtime<\/p>\n
              }<\/p>\n
              \/\/ Declare a native method<\/p>\n
              public native void callPython();<\/p>\n
              public static void main(String[] args) {<\/p>\n
                  new JNIDemo().callPython();<\/p>\n
              }<\/p>\n
          }<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          C\/C++\u4ee3\u7801\u793a\u4f8b:<\/strong><\/p>\n<\/p>\n
          #include <jni.h><\/p>\n
          #include <Python.h><\/p>\n
          #include "JNIDemo.h"<\/p>\n
          JNIEXPORT void JNICALL Java_JNIDemo_callPython(JNIEnv *env, jobject obj) {<\/p>\n
              Py_Initialize();<\/p>\n
              PyRun_SimpleString("print('Hello from Python')");<\/p>\n
              Py_Finalize();<\/p>\n
          }<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u8fd9\u79cd\u65b9\u6cd5\u9002\u5408\u9700\u8981\u6781\u9ad8\u6027\u80fd\u548c\u5e95\u5c42\u63a7\u5236\u7684\u9879\u76ee\uff0c\u4f46\u5f00\u53d1\u8fc7\u7a0b\u8f83\u4e3a\u7e41\u7410\uff0c\u4e14\u9700\u5177\u5907C\/C++\u7f16\u7a0b\u57fa\u7840\u3002<\/p>\n<\/p>\n
          \u4e09\u3001\u4f7f\u7528RESTful API\u8fdb\u884c\u901a\u4fe1<\/h3>\n<\/p>\n
          RESTful API<\/strong>\u662f\u4e00\u79cd\u901a\u8fc7HTTP\u534f\u8bae\u8fdb\u884c\u8de8\u8bed\u8a00\u901a\u4fe1\u7684\u5e38\u89c1\u65b9\u6cd5\u3002Java\u548cPython\u4ee3\u7801\u5206\u522b\u90e8\u7f72\u4e3aWeb\u670d\u52a1\uff0c\u901a\u8fc7HTTP\u8bf7\u6c42\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u3002<\/p>\n<\/p>\n
          Java\u4ee3\u7801\u793a\u4f8b\uff08\u4f7f\u7528Spring Boot\uff09:<\/strong><\/p>\n<\/p>\n
          @RestController<\/p>\n
          public class JavaController {<\/p>\n
              @GetMapping("\/hello")<\/p>\n
              public String hello() {<\/p>\n
                  return "Hello from Java";<\/p>\n
              }<\/p>\n
          }<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          Python\u4ee3\u7801\u793a\u4f8b\uff08\u4f7f\u7528Flask\uff09:<\/strong><\/p>\n<\/p>\n
          from flask import Flask, request<\/p>\n
          import requests<\/p>\n
          app = Flask(__name__)<\/p>\n
          @app.route('\/hello')<\/p>\n
          def hello():<\/p>\n
              response = requests.get('http:\/\/localhost:8080\/hello')<\/p>\n
              return f"Java says: {response.text}"<\/p>\n
          if __name__ == '__main__':<\/p>\n
              app.run(port=5000)<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u6613\u884c\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5728\u4e0d\u540c\u8bed\u8a00\u7684\u5fae\u670d\u52a1\u4e4b\u95f4\u8fdb\u884c\u901a\u4fe1\u7684\u9879\u76ee\uff0c\u4f46\u9700\u8981\u5904\u7406HTTP\u8bf7\u6c42\u7684\u5f00\u9500\u3002<\/p>\n<\/p>\n
          \u56db\u3001\u6570\u636e\u5e93\u5171\u4eab<\/h3>\n<\/p>\n
          \u6570\u636e\u5e93\u5171\u4eab<\/strong>\u662f\u4e00\u79cd\u901a\u8fc7\u6570\u636e\u5e93\u4f5c\u4e3a\u4e2d\u95f4\u5b58\u50a8\u5b9e\u73b0Java\u548cPython\u4ee3\u7801\u4e4b\u95f4\u6570\u636e\u4ea4\u6362\u7684\u65b9\u6cd5\u3002\u4e24\u8005\u53ef\u4ee5\u5206\u522b\u8bfb\u5199\u540c\u4e00\u4e2a\u6570\u636e\u5e93\uff0c\u4ece\u800c\u5b9e\u73b0\u901a\u4fe1\u3002<\/p>\n<\/p>\n
          Java\u4ee3\u7801\u793a\u4f8b:<\/strong><\/p>\n<\/p>\n
          import java.sql.Connection;<\/p>\n
          import java.sql.DriverManager;<\/p>\n
          import java.sql.Statement;<\/p>\n
          public class JavaDBExample {<\/p>\n
              public static void main(String[] args) {<\/p>\n
                  try {<\/p>\n
                      Connection conn = DriverManager.getConnection("jdbc:mysql:\/\/localhost:3306\/testdb", "user", "password");<\/p>\n
                      Statement stmt = conn.createStatement();<\/p>\n
                      stmt.executeUpdate("INSERT INTO messages (message) VALUES ('Hello from Java')");<\/p>\n
                      conn.close();<\/p>\n
                  } catch (Exception e) {<\/p>\n
                      e.printStackTrace();<\/p>\n
                  }<\/p>\n
              }<\/p>\n
          }<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          Python\u4ee3\u7801\u793a\u4f8b:<\/strong><\/p>\n<\/p>\n
          import mysql.connector<\/p>\n
          conn = mysql.connector.connect(user='user', password='password', host='127.0.0.1', database='testdb')<\/p>\n
          cursor = conn.cursor()<\/p>\n
          cursor.execute("SELECT message FROM messages")<\/p>\n
          for (message,) in cursor:<\/p>\n
              print(f"Java says: {message}")<\/p>\n
          conn.close()<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u6301\u4e45\u5316\u6570\u636e\u7684\u9879\u76ee\uff0c\u4f46\u9700\u8981\u8003\u8651\u6570\u636e\u5e93\u7684\u5e76\u53d1\u548c\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<\/p>\n
          \u4e94\u3001\u6d88\u606f\u961f\u5217<\/h3>\n<\/p>\n
          \u6d88\u606f\u961f\u5217<\/strong>\uff08\u5982RabbitMQ\u3001Kafka\u7b49\uff09\u662f\u4e00\u79cd\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u5e38\u7528\u7684\u5f02\u6b65\u901a\u4fe1\u673a\u5236\u3002Java\u548cPython\u4ee3\u7801\u53ef\u4ee5\u901a\u8fc7\u53d1\u9001\u548c\u63a5\u6536\u6d88\u606f\u5b9e\u73b0\u901a\u4fe1\u3002<\/p>\n<\/p>\n
          Java\u4ee3\u7801\u793a\u4f8b\uff08\u4f7f\u7528RabbitMQ\uff09:<\/strong><\/p>\n<\/p>\n
          import com.rabbitmq.client.ConnectionFactory;<\/p>\n
          import com.rabbitmq.client.Connection;<\/p>\n
          import com.rabbitmq.client.Channel;<\/p>\n
          public class JavaProducer {<\/p>\n
              private final static String QUEUE_NAME = "hello";<\/p>\n
              public static void main(String[] argv) throws Exception {<\/p>\n
                  ConnectionFactory factory = new ConnectionFactory();<\/p>\n
                  factory.setHost("localhost");<\/p>\n
                  try (Connection connection = factory.newConnection(); Channel channel = connection.createChannel()) {<\/p>\n
                      channel.queueDeclare(QUEUE_NAME, false, false, false, null);<\/p>\n
                      String message = "Hello from Java";<\/p>\n
                      channel.basicPublish("", QUEUE_NAME, null, message.getBytes());<\/p>\n
                      System.out.println(" [x] Sent '" + message + "'");<\/p>\n
                  }<\/p>\n
              }<\/p>\n
          }<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          Python\u4ee3\u7801\u793a\u4f8b\uff08\u4f7f\u7528RabbitMQ\uff09:<\/strong><\/p>\n<\/p>\n
          import pika<\/p>\n
          connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))<\/p>\n
          channel = connection.channel()<\/p>\n
          channel.queue_declare(queue='hello')<\/p>\n
          def callback(ch, method, properties, body):<\/p>\n
              print(f" [x] Received {body}")<\/p>\n
          channel.basic_consume(queue='hello', on_message_callback=callback, auto_ack=True)<\/p>\n
          print(' [*] Waiting for messages. To exit press CTRL+C')<\/p>\n
          channel.start_consuming()<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u6d88\u606f\u961f\u5217\u9002\u5408\u9700\u8981\u9ad8\u53ef\u9760\u6027\u548c\u89e3\u8026\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u4f46\u9700\u8981\u914d\u7f6e\u548c\u7ba1\u7406\u6d88\u606f\u961f\u5217\u670d\u52a1\u3002<\/p>\n<\/p>\n
          \u7ed3\u8bba<\/h3>\n<\/p>\n
          Java\u548cPython\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u4e00\u8d77\u4f7f\u7528\uff0c\u6bcf\u79cd\u65b9\u5f0f\u90fd\u6709\u5176\u4f18\u7f3a\u70b9\u3002\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5<\/strong>\u53d6\u51b3\u4e8e\u9879\u76ee\u7684\u5177\u4f53\u9700\u6c42\uff0c\u5982\u6027\u80fd\u8981\u6c42\u3001\u5f00\u53d1\u96be\u5ea6\u3001\u7cfb\u7edf\u67b6\u6784\u7b49\u3002\u65e0\u8bba\u662f\u4f7f\u7528\u8de8\u8bed\u8a00\u5de5\u5177\u3001JNI\u3001RESTful API\u3001\u6570\u636e\u5e93\u5171\u4eab\u8fd8\u662f\u6d88\u606f\u961f\u5217\uff0c\u90fd\u80fd\u591f\u5b9e\u73b0Java\u548cPython\u7684\u4e92\u64cd\u4f5c\u6027\uff0c\u4e3a\u9879\u76ee\u5f00\u53d1\u63d0\u4f9b\u66f4\u5927\u7684\u7075\u6d3b\u6027\u548c\u6548\u7387\u3002<\/p>\n<\/p>\n
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