一文带你搞懂如何在Spring Boot中轻松调用Python脚本

# sum.py
import sys
 
def calculate_sum(a, b):
    return a + b
 
if __name__ == '__main__':
    # 获取命令行传递的参数
    num1 = int(sys.argv[1])
    num2 = int(sys.argv[2])
    
    result = calculate_sum(num1, num2)
    
    # 打印结果
    print(result)

python sum.py 3 5

package com.example.demo.service;
 
import java.io.BufferedReader;
import java.io.InputStreamReader;
import org.springframework.stereotype.Service;
 
@Service
public class PythonScriptService {
 
    public String executePythonScript(int num1, int num2) {
        try {
            // 构建ProcessBuilder来执行Python脚本
            ProcessBuilder processBuilder = new ProcessBuilder("python", "path/to/sum.py", String.valueOf(num1), String.valueOf(num2));
            processBuilder.redirectErrorStream(true);
 
            // 启动进程并获取输出
            Process process = processBuilder.start();
 
            // 读取Python脚本的输出
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            StringBuilder output = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                output.append(line).append("\n");
            }
 
            // 等待Python脚本执行完成
            process.waitFor();
            return output.toString().trim(); // 返回Python脚本的输出
        } catch (Exception e) {
            e.printStackTrace();
            return "Error executing Python script";
        }
    }
}

package com.example.demo.controller;
 
import com.example.demo.service.PythonScriptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
public class PythonScriptController {
 
    @Autowired
    private PythonScriptService pythonScriptService;
 
    @GetMapping("/calculate")
    public String calculate(@RequestParam int num1, @RequestParam int num2) {
        // 调用Python脚本
        return pythonScriptService.executePythonScript(num1, num2);
    }
}