SpringMVC 拦截器或Aop终止执行 并返回结果？

Question

如何在Spring mvc的拦截器或AOP中终止执行 并返回json

Answer 1

interceptor 如果要返回json，比较麻烦，比较方便的做法是抛一个异常，然后在@ExceptionHandler里处理。

Answer 2

@Component
public class ManagerInterceptor extends HandlerInterceptorAdapter {
    
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws IOException {
        LOGGER.info("begin ManagerInterceptor");
        if (request.getMethod().equals("OPTIONS")) {
            return true;
        }
        String user = request.getHeader("user");
        String password = request.getHeader("password");
        if (StringUtils.isEmpty(user) || StringUtils.isEmpty(password) || !user.equals("giraffe") || !password.equals("tree")) {
            response.setContentType("application/json;charset=utf-8");
            ReturnObject returnObject = ReturnObject.fail("就不告诉你什么错误 (๑╹◡╹)ﾉ");
            response.getWriter().print(JSON.toJSONString(returnObject));

            return false;
        }

        return true;
    }
}