先在pom中引入 JWT依赖
<!-- JWT -->
<dependency>
<groupId>com.auth0</groupId>
<artifactId>java-jwt</artifactId>
<version>4.3.0</version>
</dependency>然后引入一个生成的 token 的工具类
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.StrUtil;
import com.auth0.jwt.JWT;
import com.auth0.jwt.algorithms.Algorithm;
import com.example.boot.entity.User;
import com.example.boot.mapper.UserMapper;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.Date;
@Component
public class TokenUtils {
private static UserMapper staticUserMapper;
@Resource
UserMapper userMapper;
@PostConstruct
public void setUserService() {
staticUserMapper = userMapper;
}
/**
* 生成token
*
* @return
*/
public static String genToken(String userId, String sign) {
return JWT.create().withAudience(userId) // 将 user id 保存到 token 里面,作为载荷
.withExpiresAt(DateUtil.offsetHour(new Date(), 2)) // 2小时后token过期
.sign(Algorithm.HMAC256(sign)); // 以 password 作为 token 的密钥
}
/**
* 获取当前登录的用户信息
*
* @return user对象
*/
public static User getCurrentUser() {
try {
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
String token = request.getHeader("token");
if (StrUtil.isNotBlank(token)) {
String userId = JWT.decode(token).getAudience().get(0);
return staticUserMapper.selectById(Integer.valueOf(userId));
}
} catch (Exception e) {
return null;
}
return null;
}
}
然后具体实现上有两种方式，一个是使用自定义注解配合拦截器，另外一个是使用拦截器。
方法一：
先自定义个注解，然后再定义一个自定义拦截器 JwtInterceptor 类，同时让 JwtInterceptor 类继承 HandlerInterceptor 类 。
import java.lang.annotation.*;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface AuthAccess {
}
方法二：
直接写一个自定义拦截器 JwtInterceptor
import cn.hutool.core.util.StrUtil;
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.example.boot.common.Result;
import com.example.boot.entity.User;
import com.example.boot.exception.ServiceException;
import com.example.boot.mapper.UserMapper;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class JwtInterceptor implements HandlerInterceptor {
@Resource
private UserMapper userMapper;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
String token = request.getHeader("token");
if (StrUtil.isBlank(token)) {
token = request.getParameter("token");
}
// 如果不是映射到方法直接通过
if (handler instanceof HandlerMethod) {
AuthAccess annotation = ((HandlerMethod) handler).getMethodAnnotation(AuthAccess.class);
if (annotation != null) {
return true;
}
}
// 执行认证
if (StrUtil.isBlank(token)) {
throw new ServiceException("401", "请登录");
}
// 获取 token 中的 user id
String userId;
try {
userId = JWT.decode(token).getAudience().get(0);
} catch (JWTDecodeException j) {
throw new ServiceException("401", "请登录");
}
// 根据token中的userid查询数据库
User user = userMapper.selectById(userId);
if (user == null) {
throw new ServiceException("401", "请登录");
}
// 用户密码加签验证 token
JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(user.getPassword())).build();
try {
jwtVerifier.verify(token); // 验证token
} catch (JWTVerificationException e) {
throw new ServiceException("401", "请登录");
}
return true;
}
}再写一个配置拦截器 InterceptorConfig 类文章来源：https://www.toymoban.com/news/detail-683519.html
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
@Configuration
public class InterceptorConfig extends WebMvcConfigurationSupport {
@Override
protected void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(jwtInterceptor())
.addPathPatterns("/**")
super.addInterceptors(registry);
}
@Bean
public JwtInterceptor jwtInterceptor() {
return new JwtInterceptor();
}
}当然，前端在request.js文件中文章来源地址https://www.toymoban.com/news/detail-683519.html
let user = JSON.parse(localStorage.getItem("honey-user") || '{}')
config.headers['token'] = user.token // 设置请求头到了这里，关于SpringBoot集成JWT token实现权限验证的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！
