1、添加类实现HandlerInterceptor
public class RouteInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json; charset=utf-8");
try {
PrintWriter printWriter = response.getWriter();
printWriter.append(new ObjectMapper().writeValueAsString(new Protocol(-1, "您无此操作权限")));
return false;
} catch (Exception e) {
e.printStackTrace();
response.sendError(500);
return false;
}
}
@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
}
}
2、拦截器返回Json数据-- response赋值
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json; charset=utf-8");
PrintWriter printWriter = response.getWriter();
printWriter.append(new ObjectMapper().writeValueAsString(new Protocol(-1, "您无此操作权限")));
3、配置拦截器 -- @Configuration
@Configuration
public class WebAppConfig extends WebMvcConfigurerAdapter {
// 多个拦截器组成一个拦截器链
// addPathPatterns 用于添加拦截规则
// excludePathPatterns 用户排除拦截
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new RouteInterceptor()) // 添加拦截器
.addPathPatterns("/**") // 拦截所有请求
.excludePathPatterns("/user/**", "/system/**", "/base/**"); //对应的不拦截的请求
}
}
