<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就開始頒發(fā)jwt
            String token = jwtUtils.generateToken(name);
            System.out.println(token);
            return ResultResponse.returnToken(ResultResponse.success("頒發(fā)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("用戶信息獲取成功",map));
        }
        return ResultResponse.returnToken(ResultResponse.fail("用戶已經(jīng)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并返回給客戶端,用戶名和密碼正確就生成jwt
        return userService.login(username,password);
    }

 
@Component
public class InterceptorConfig implements WebMvcConfigurer {
    private JdbcTemplate jdbcTemplate;
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new HandlerInterceptor() {
            //給前端輸出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("已經(jīng)進(jìn)入攔截器");
                // 設(shè)置跨域訪問的響應(yīng)頭信息
                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");
                // 獲取tokenHeader
                String tokenHeader = request.getHeader("x-token");
                System.out.println("前端傳入X-Token是============="+tokenHeader);
                // 進(jìn)行token合法性驗證
                if(!JwtUtils.validateToken(tokenHeader)){
                    String jsonString = JSON.toJSONString(ResultResponse.illegalToken());
                    returnJson(response,jsonString);
                    System.out.println("未放行！??！");
                    return false;
                }
                // 鑒權(quán)操作
                String path = request.getRequestURI();
                String sub = JwtUtils.getSubject(tokenHeader);
                System.out.println(path);
                // 從數(shù)據(jù)庫中查詢用戶角色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("擁有此節(jié)點權(quán)限:"+path);
                } else {
                    String jsonString = JSON.toJSONString(ResultResponse.illegalToken());
                    returnJson(response,jsonString);
                    System.out.println("不擁有此節(jié)點權(quán)限:"+path);
                    return false;
                }
                return true;
            }
            @Override
            public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
//                System.out.println("請求處理完畢，但還沒有進(jìn)行視圖渲染");
            }
            @Override
            public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//                System.out.println("整個請求處理完成，視圖已渲染完畢");
            }
        }).addPathPatterns("/**/*").excludePathPatterns("/tskj/user/login","/static/*","/tskj/setting/getSetData","/tskj/user/logout");
        System.out.println("攔截器已經(jīng)初始化并添加成功");
        WebMvcConfigurer.super.addInterceptors(registry);
    }
    public InterceptorConfig(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }
}