java调用python获取返回值_java和python哪个好

java调用python获取返回值_java和python哪个好在 Java 中调用 Python 接口可以通过以下几种方法 1 使用 Java 的 ProcessBuild 类执行 Python 脚本 javaProcessB processBuild new ProcessBuild python path to your python script py Process process

在Java中调用Python接口可以通过以下几种方法:

1. 使用Java的`ProcessBuilder`类执行Python脚本:

 ProcessBuilder processBuilder = new ProcessBuilder("python", "path/to/your/python_script.py"); Process process = processBuilder.start(); BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream())); String line; while ((line = reader.readLine()) != null) { System.out.println(line); } int exitCode = process.waitFor(); System.out.println("Exit Code: " + exitCode); 

2. 使用Jython库:

 import org.python.core.PyObject; import org.python.util.PythonInterpreter; public class JavaCallPython { public static void main(String[] args) { try (PythonInterpreter interpreter = new PythonInterpreter()) { interpreter.execfile("path/to/your/python_script.py"); PyObject result = interpreter.get("function_name"); // 调用Python函数 PyObject resultObj = result.__call__(args); System.out.println(resultObj); } } } 

3. 使用`Runtime.getRuntime()`执行Python脚本:

 try { Process process = Runtime.getRuntime().exec("python path/to/your/python_script.py"); BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream())); String line; while ((line = reader.readLine()) != null) { System.out.println(line); } int exitCode = process.waitFor(); System.out.println("Exit Code: " + exitCode); } catch (IOException | InterruptedException e) { e.printStackTrace(); } 

4. 使用Flask创建Python Web接口:

 Python Flask接口示例 from flask import Flask, request, jsonify app = Flask(__name__) @app.route('/getStr', methods=['POST', 'GET']) def getStr(): return 'hello, world' @app.route('/success/') def success(name): return 'welcome %s' % name @app.route('/login', methods=['POST', 'GET']) def login(): if request.method == 'POST': user = request.form['nm'] print(user) return 'logged in' 

然后,在Java中通过HTTP请求调用这些接口:

 import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; public class Main { public static void main(String[] args) { try { URL url = new URL("http://localhost:5000/getStr"); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); int responseCode = connection.getResponseCode(); System.out.println("Response Code: " + responseCode); BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream())); String inputLine; StringBuffer response = new StringBuffer(); while ((inputLine = in.readLine()) != null) { response.append(inputLine); } in.close(); System.out.println(response.toString()); } catch (Exception e) { e.printStackTrace(); } } } 

请根据你的具体需求选择合适的方法。

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