Spring boot框架JWT实现用户账户密码登录验证流程

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
  <groupId>io.jsonwebtoken</groupId>
  <artifactId>jjwt</artifactId>
  <version>0.9.1</version>
</dependency>

    public List<UserEntity> findAllService() {
        return userMapper.findAllUser();
    }
    public ResultResponse login(String name,String password) {
        UserEntity user=userMapper.checkPassword(name,password);
        if(user != null){
            //不等于null就开始颁发jwt
            String token = jwtUtils.generateToken(name);
            System.out.println(token);
            return ResultResponse.returnToken(ResultResponse.success("颁发token成功",token));
        }
        return ResultResponse.illegalToken();
    }
    public ResultResponse info(String token) {
        String tokenString = token;
        String subject = JwtUtils.getSubject(tokenString);
        UserDTO userinfo=userMapper.getUserByUsername(subject);
        int status=userinfo.getStatus();
        if(status==1){
            String role=userinfo.getRoleName();
            Map<String, Object> map = new HashMap<>();
            String[] roles = {role};
            map.put("name", userinfo.getName());
            map.put("avatar", userinfo.getAvatar());
            map.put("roles", roles);
            return ResultResponse.returnToken(ResultResponse.success("用户信息获取成功",map));
        }
        return ResultResponse.returnToken(ResultResponse.fail("用户已经被禁用",userinfo));
    }

    @CrossOrigin
    @PostMapping("/user/login")
    public ResultResponse login(@RequestBody UserEntity user) {
        String username = user.getUsername();
        String password = user.getPassword();
        // 生成JWT并返回给客户端,用户名和密码正确就生成jwt
        return userService.login(username,password);
    }

 
@Component
public class InterceptorConfig implements WebMvcConfigurer {
    private JdbcTemplate jdbcTemplate;
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new HandlerInterceptor() {
            //给前端输出json的方法
            private void returnJson(HttpServletResponse response, String json) throws Exception{
                PrintWriter writer = null;
                try {
                    writer = response.getWriter();
                    writer.write(json);
                } catch (IOException e) {
                } finally {
                    if (writer != null)
                        writer.close();
                }
            }
            @Override
            public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
                System.out.println("已经进入拦截器");
                // 设置跨域访问的响应头信息
                response.setHeader("Access-Control-Allow-Origin", "*");
                response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
                response.setHeader("Access-Control-Max-Age", "3600");
                response.setHeader("Access-Control-Allow-Headers", "Content-Type, X-Token");
                response.setCharacterEncoding("UTF-8");
                response.setContentType("text/html; charset=utf-8");
                // 获取tokenHeader
                String tokenHeader = request.getHeader("x-token");
                System.out.println("前端传入X-Token是============="+tokenHeader);
                // 进行token合法性验证
                if(!JwtUtils.validateToken(tokenHeader)){
                    String jsonString = JSON.toJSONString(ResultResponse.illegalToken());
                    returnJson(response,jsonString);
                    System.out.println("未放行！！！");
                    return false;
                }
                // 鉴权操作
                String path = request.getRequestURI();
                String sub = JwtUtils.getSubject(tokenHeader);
                System.out.println(path);
                // 从数据库中查询用户角色id
                Integer roleId = jdbcTemplate.queryForObject("SELECT role FROM tskj_user WHERE name = ?", Integer.class, sub);
                String targets = jdbcTemplate.queryForObject("SELECT targets FROM tskj_role WHERE id = ?", String.class, roleId);
                String tarid = jdbcTemplate.queryForObject("SELECT id FROM tskj_target WHERE target = ? and status=1", String.class, path);
                if (targets.contains(tarid)) {
                    System.out.println("拥有此节点权限:"+path);
                } else {
                    String jsonString = JSON.toJSONString(ResultResponse.illegalToken());
                    returnJson(response,jsonString);
                    System.out.println("不拥有此节点权限:"+path);
                    return false;
                }
                return true;
            }
            @Override
            public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
//                System.out.println("请求处理完毕，但还没有进行视图渲染");
            }
            @Override
            public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//                System.out.println("整个请求处理完成，视图已渲染完毕");
            }
        }).addPathPatterns("/**/*").excludePathPatterns("/tskj/user/login","/static/*","/tskj/setting/getSetData","/tskj/user/logout");
        System.out.println("拦截器已经初始化并添加成功");
        WebMvcConfigurer.super.addInterceptors(registry);
    }
    public InterceptorConfig(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }
}