springboot 全局异常拦截器，友好异常提示

 1. 添加config 配置类

package org.fh.config;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.json.MappingJackson2JsonView;
/**
 * 说明：错误异常拦截处理
 * 作者：FH Admin
 * from fhadmin.cn
 */
@Configuration
public class ExceptionConfiguration implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler,
            Exception ex) {
        ModelAndView mv = new ModelAndView(new MappingJackson2JsonView());  //返回json
        
        String exInfo = ex.toString().replaceAll("\n", "<br/>");
        
        boolean status = exInfo.contains("Subject does not have permission");
        
        if(status){
            exInfo = "[没有此页面的访问权限]" + exInfo;
        }else {
            System.out.println("==============异常开始=============");
            ex.printStackTrace();
            System.out.println("==============异常结束=============");
        }
        mv.addObject("exception", exInfo);
        mv.addObject("result", "exception");
        
        return mv;
    }
    
}      

2.  在逻辑类的方法上抛出异常 throws Exception，比如  

/**删除
     * @param out
     * @throws Exception
     */
    @RequestMapping(value="/delete")
    @RequiresPermissions("autograph:del")
    @ResponseBody
    public Object delete() throws Exception{
        Map<String,String> map = new HashMap<String,String>();
        String errInfo = "success";
        //xxxx
        map.put("result", errInfo);             //返回结果
        return map;
    }      

3. 前端页面接收异常结果

//发送 post 请求提交保存
            $.ajax({
                    xhrFields: {
                        withCredentials: true
                    },
                    type: "POST",
                    url: httpurl+'xxxx/delete',
                    data: {tm:new Date().getTime()},
                    dataType:"json",
                    success: function(data){
                        if("success" == data.result){
                            
                        }else if ("exception" == data.result){
                            alert("模块异常"+data.exception);//显示异常
                            
                        }
                    }
                });