springboot结合jwt实现基于restful接口的身份认证

基于restful接口的身份认证,可以采用jwt的方式实现,想了解jwt,可以查询相关资料,这里不做介绍~

下面直接看如何实现

1、首先添加jwt的jar包,pom.xml中添加依赖包:

        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>

 

2、添加工具类JwtUtil.java:

package com.demo.news.common;

import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class JwtUtil {
    static final String SECRET = "ThisIsASecret";

    public static String generateToken(String username) {
        HashMap<String, Object> map = new HashMap<>();
        //you can put any data in the map
        map.put("username", username);
        String jwt = Jwts.builder()
                .setClaims(map)
                .setExpiration(new Date(System.currentTimeMillis() + 3600_000_000L))// 1000 hour
                .signWith(SignatureAlgorithm.HS512, SECRET)
                .compact();
        return "Bearer "+jwt; //jwt前面一般都会加Bearer
    }

    public static void validateToken(String token) {
        try {
            // parse the token.
            Map<String, Object> body = Jwts.parser()
                    .setSigningKey(SECRET)
                    .parseClaimsJws(token.replace("Bearer ",""))
                    .getBody();
        }catch (Exception e){
            throw new IllegalStateException("Invalid Token. "+e.getMessage());
        }
    }
}

这个工具类有两个方法,一个生成token,一个验证token

 

添加过滤器JwtAuthenticationFilter.java

package com.demo.news.common;

import org.springframework.util.AntPathMatcher;
import org.springframework.util.PathMatcher;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


public class JwtAuthenticationFilter extends OncePerRequestFilter {
    private static final PathMatcher pathMatcher = new AntPathMatcher();

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        try {
            if(isProtectedUrl(request)) {
                String token = request.getParameter("token");
                //检查jwt令牌, 如果令牌不合法或者过期, 里面会直接抛出异常, 下面的catch部分会直接返回
                JwtUtil.validateToken(token);
            }
        } catch (Exception e) {
            response.sendError(HttpServletResponse.SC_UNAUTHORIZED, e.getMessage());
            return;
        }
        //如果jwt令牌通过了检测, 那么就把request传递给后面的RESTful api
        filterChain.doFilter(request, response);
    }


    //我们只对地址 /api 开头的api检查jwt. 不然的话登录/login也需要jwt
    private boolean isProtectedUrl(HttpServletRequest request) {
        return pathMatcher.match("/api/**", request.getServletPath());
    }

}

这个过滤器会过滤所有以api打头的路径

 

注册过滤器MyJwtFilter.java

package com.demo.news.common;

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MyJwtFilter {
    
    @Bean
    public FilterRegistrationBean jwtFilter() {
        final FilterRegistrationBean registrationBean = new FilterRegistrationBean();
        JwtAuthenticationFilter filter = new JwtAuthenticationFilter();
        registrationBean.setFilter(filter);
        return registrationBean;
    }

}

 

3、开始使用

通过之前的代码,所有路径以api开头的请求如果不添加token参数都会报没有权限的错误,说明过滤器已经生效了

下面我们根据用户名和密码来验证用户身份,如果用户身份通过验证,那个生成token,拿到这个token,路径以api打头的请求添加上这个token参数

验证用户身份的代码:

if(用户验证成功) {
    String token = JwtUtil.generateToken(user.getUsername());
}

拿到这个token,在路径以api打头的请求上添加上这个token,比如:

http://localhost:8083/news/api/list?token=Bearer eyJhbGciOiJIUzUxMiJ9.eyJleHAiOjE1NTM2MjQxMzgsInVzZXJuYW1lIjoiYWRtaW4ifQ.FQsNIr_b9105CoV-jx8k9lgtyJ6cM_z48g1fQeSUBowkOGBk-OXGdgtVa1215lD75U3N3tF3yZs10MtJ7kZstA

posted @ 2019-02-13 11:21  魔豆  阅读(1001)  评论(0编辑  收藏  举报