Java：Java程序通过执行系统命令调用Python脚本

本文实现功能：Java程序调用Python脚本

Python脚本

import sysdef add(x, y):return x + yif __name__ == "__main__":print(add(int(sys.argv[1]), int(sys.argv[2])))

直接执行

$ python math.py 1 2
3

Java程序调用Python脚本

package io.github.mouday.utils;import java.io.*;/*** 执行系统命令*/
public final class ShellUtil {private ShellUtil() {}/*** 操作系统名称** @return Mac OS X*/public static String getOsName() {return System.getProperty("os.name");}/*** 判断是否为windows操作系统** @return*/public static Boolean isWindows() {return ShellUtil.getOsName().toLowerCase().contains("win");}/*** 根据系统返回对应平台执行命令* @param command* @return*/public static ProcessBuilder getProcessBuilder(String command) {if (ShellUtil.isWindows()) {return new ProcessBuilder("cmd", "/c", command);} else {return new ProcessBuilder("bash", "-c", command);}}/*** 执行系统命令* @param command* @return*/public static String executeCommand(String command) {try {ProcessBuilder pb = ShellUtil.getProcessBuilder(command);pb.redirectErrorStream(true);Process process = pb.start();process.waitFor();InputStream inputStream = process.getInputStream();BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));String line;StringBuilder result = new StringBuilder();while ((line = reader.readLine()) != null) {result.append(line);// 换行符result.append(System.lineSeparator());}process.waitFor();inputStream.close();reader.close();process.destroy();return result.toString();} catch (InterruptedException | IOException e) {throw new RuntimeException(e);}}public static void main(String[] args) {// System.out.println(ShellUtil.executeCommand("echo 'hello'"));// helloSystem.out.println(ShellUtil.executeCommand("python math.py 1 2"));// 3}
}

参考视频

1. JAVA开发必会小技巧8——用代码调用系统指令