springboot实现token验证登陆状态的示例代码
作者:温正实
本文主要介绍了spring boot 实现token验证登陆状态,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
1、添加maven依赖到pom.xml
<dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt-api</artifactId> <version>0.11.5</version> </dependency> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt-impl</artifactId> <version>0.11.5</version> </dependency> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt-gson</artifactId> <version>0.11.5</version> </dependency>
2、写个持久工具类
package com.scxhgh.scxhgh.token_session; import io.jsonwebtoken.Claims; import io.jsonwebtoken.Jwts; import io.jsonwebtoken.SignatureAlgorithm; import io.jsonwebtoken.security.Keys; import org.springframework.stereotype.Component; import java.security.Key; import java.util.Date; @Component public class JwtUtil { // // <dependency> // <groupId>io.jsonwebtoken</groupId> // <artifactId>jjwt-api</artifactId> // <version>0.11.5</version> // </dependency> // <dependency> // <groupId>io.jsonwebtoken</groupId> // <artifactId>jjwt-impl</artifactId> // <version>0.11.5</version> // </dependency> // // // <dependency> // <groupId>io.jsonwebtoken</groupId> // <artifactId>jjwt-gson</artifactId> // <version>0.11.5</version> // </dependency> private final String secretKey = "dshhdshissajsakpxfksxxz"; // 用于签署和验证令牌的密钥,请替换为自己的密钥 private final Key key = Keys.hmacShaKeyFor(secretKey.getBytes()); private final long validityInMilliseconds = 3600000; // 令牌有效期一小时 // private final long validityInMilliseconds = 60000; // 令牌有效期一分钟 public String generateToken(String username) { Date now = new Date(); Date validity = new Date(now.getTime() + validityInMilliseconds); return Jwts.builder() .setSubject(username) .setIssuedAt(now) .setExpiration(validity) .signWith(key, SignatureAlgorithm.HS256) .compact(); } public String getUsernameFromToken(String token) { Claims claims = Jwts.parserBuilder() .setSigningKey(key) .build() .parseClaimsJws(token) .getBody(); return claims.getSubject(); } public boolean validateToken(String token) { try { Jwts.parserBuilder() .setSigningKey(key) .build() .parseClaimsJws(token); return true; } catch (Exception e) { return false; } } }
3、启动服务器测试下,写个controller和html,客户端请求获取token
controller(生成token 与验证 token):
package com.scxhgh.scxhgh.token_session; import org.springframework.web.bind.annotation.*; @RestController @RequestMapping("/api") public class UserController { private final JwtUtil jwtUtil; public UserController(JwtUtil jwtUtil) { this.jwtUtil = jwtUtil; } // 生成token @PostMapping("/login_token") public String login(@RequestBody UserLoginRequest request) { // 在实际应用中,你可以验证用户名和密码,然后生成令牌 // 这里只是一个简单的示例,假设用户名有效 String username = request.getUsername(); String token = jwtUtil.generateToken(username); return token; } // 验证token @GetMapping("/user") public String getUserInfo(@RequestHeader("Authorization") String token) { if (jwtUtil.validateToken(token)) { String username = jwtUtil.getUsernameFromToken(token); return "Hello, " + username + "!"; } else { return "Invalid token"; } } }
html (请求token)
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Login Page</title> </head> <body> <h1>Login Page</h1> <form id="login-form"> <label for="username">Username:</label> <input type="text" id="username" name="username" required><br><br> <label for="password">Password:</label> <input type="password" id="password" name="password" required><br><br> <button type="button" onclick="login()">Login</button> </form> <div id="token-info" style="display: none;"> <h2>Token Information</h2> <p id="token-content"></p> </div> <script> function login() { const username = document.getElementById('username').value; const password = document.getElementById('password').value; // 发送登录请求到后端 fetch('/api/login_token', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ username, password }) }) .then(response => response.text()) .then(token => { // 显示令牌信息 document.getElementById('token-info').style.display = 'block'; document.getElementById('token-content').textContent = 'Token: ' + token; }) .catch(error => { console.error('Login failed:', error); }); } </script> </body> </html>
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