kill-port（杀死占用端口的所有进程）
项目背景：
单点登录的子项目开发的时候需要粘贴token，如果程序卡顿就会出现a端口被占用，而我们已经粘贴过token到a端口，这时候我们希望快速杀死a端口，常规思路是会执行
netstat -ano | findstr :${port}
taskkill /PID ${pid} /F
taskkill /PID ${pid} /F
来杀死端口，如果进程占用较多还会比较繁琐。
实现步骤
全局实现kill 命令来杀死某个端口
创建项目结构
创建项目package.json
npm init
package.json文件，并需要新增bin 自定义指令，以便于后续可以使用kill命令直接杀死进程
{
"name": "kill-port",
"version": "1.0.0",
"description": "一个用来杀死占用某端口所有进程的脚本命令",
"main": "index.js",
"bin": {
"kill": "./index.js"
},
"scripts": {
"test": "node index.js"
},
"author": "2876920450@qq.com",
"license": "ISC"
}
创建主函数文件index （test）
在index头部需要加上
#!/usr/bin/env node
console.log('欢迎使用端口号查找工具');
注册全局kill-port 应用
在文件夹目录命令行使用下面命令注册全局kill-port 应用
npm install -g .
执行kill命令
然后执行kill命令能够正常打印
kill
主函数源码
#!/usr/bin/env node
const process = require('process');
const os = require('os');
const { execSync } = require('child_process');
const main=()=>{
const port = process.argv[2];
console.log(port,"port");
const isWindows = os.type() === 'Windows_NT';
try {
console.log(`正在查找占用端口 ${port}的进程...`);
let command;
if (isWindows) {
command = `netstat -ano | findstr :${port}`;
} else {
command = `lsof -i :${port}`;
}
const result = execSync(command).toString();
if (result.trim() === '') {
console.log(`No process is using port ${port}.`);
process.exit(0);
}
let pids = [];
if (isWindows) {
const lines = result.split('\n');
for (const line of lines) {
if (line.includes(':') && (line.includes('LISTENING') || line.includes('ESTABLISHED'))) {
const match = line.match(/\s(\d+)\s$/);
if (match) {
const pid = match[1];
if (pid && !isNaN(pid)) {
pids.push(pid);
}
}
}
}
} else {
const lines = result.split('\n');
for (const line of lines) {
if (!line.startsWith('COMMAND')) {
const parts = line.split(/\s+/);
const pid = parts[1];
if (pid && !isNaN(pid)) {
pids.push(pid);
}
}
}
}
if (pids.length === 0) {
console.log(`No process is using port ${port}.`);
process.exit(0);
}
console.log(`Found processes using port ${port}: ${pids.join(', ')}`);
console.log('Attempting to kill these processes...');
pids.forEach(pid => {
try {
if (isWindows) {
execSync(`taskkill /PID ${pid} /F`);
} else {
execSync(`kill -9 ${pid}`);
}
console.log(`Successfully killed process with PID: ${pid}`);
} catch (error) {
console.error(`Failed to kill process with PID ${pid}: ${error.message}`);
}
});
} catch (error) {
console.error(`Error: ${error.message}`);
console.error(`未发现占用端口 ${port}的进程`);
process.exit(1);
}
}
main()
