在java中，执行python脚本

package com.baidu.udf;

import java.io.*;

/**
 * 在Java中执行Python脚本
 */
public class PythonExecutor {

    /**
     * 执行Python脚本并获取输出
     */
    public static String executeScript(String pythonCode) throws Exception {
        // 创建临时Python文件
        File tempFile = File.createTempFile("temp_script_", ".py");
        tempFile.deleteOnExit();

        // 写入Python代码
        try (FileWriter writer = new FileWriter(tempFile)) {
            writer.write(pythonCode);
        }

        // 执行Python脚本
        return executePython(tempFile.getAbsolutePath());
    }

    /**
     * 执行Python脚本文件
     */
    public static String executePython(String scriptPath) throws Exception {
        ProcessBuilder pb = new ProcessBuilder("python3", scriptPath);
        pb.redirectErrorStream(true);
        Process process = pb.start();

        // 读取输出
        StringBuilder output = new StringBuilder();
        try (BufferedReader reader = new BufferedReader(
                new InputStreamReader(process.getInputStream()))) {
            String line;
            while ((line = reader.readLine()) != null) {
                output.append(line).append("\n");
            }
        }

        process.waitFor();
        return output.toString().trim();
    }

    public static void main(String[] args) throws Exception {
        // 方法1: 直接执行Python代码
        String pythonCode = "print('Hello from Python!')";
        String result = executeScript(pythonCode);
        System.out.println("Result: " + result);

        // 方法2: 执行已有的Python脚本
        // String result = executePython("/path/to/your/script.py");
        // System.out.println(result);
    }
}