const jwt = require('jsonwebtoken');

// 生成JWT的函数

function generateToken(userId) {

const token = jwt.sign({ userId }, 'secret_key', { expiresIn: '1h' });

return token;

}

// 验证JWT的函数

function verifyToken(token) {

try {

const decoded = jwt.verify(token, 'secret_key');

return decoded;

} catch (err) {

console.error('Token verification failed:', err);

return null;

}

科研系统

}

]]>

const userId = 12345;

const token = generateToken(userId);

console.log("Generated Token:", token);

]]>

const receivedToken = "your_jwt_token_here";

const user = verifyToken(receivedToken);

if (user) {

console.log("Valid token, user ID:", user.userId);

} else {

console.log("Invalid or expired token.");

}

]]>