08-自定义错误处理

1.在resources/public/error/ 下定义404html\500.html\501.html

2.创建CommonException类并用注解@ControllerAdvice自定义统一异常处理

package com.study.model.commonError;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.servlet.ModelAndView;

public class CommonException {
    private static final Logger log= LoggerFactory.getLogger(CommonException.class);
    @ExceptionHandler({RuntimeException.class})
    @ResponseStatus(HttpStatus.OK)
    public ModelAndView processException(RuntimeException exception){
        log.info("自定义异常处理-RuntimeException");
        ModelAndView m=new ModelAndView();
        m.addObject("roncooException",exception.getMessage());
        m.setViewName("/error/501.html");
        return m;
    }
    @ExceptionHandler({Exception.class})
    @ResponseStatus(HttpStatus.OK)
    public ModelAndView processException(Exception exception){
        log.info("自定义异常处理-Exception");
        ModelAndView m=new ModelAndView();
        m.addObject("roncooException",exception.getMessage());
        m.setViewName("/error/500.html");
        return m;
    }

}

     在设置错误页面时，虽然我的错误页面是在public/error下面，但是路径上不能加public，不然就跑去404页面而不是匹配的页面

3.在UserController增加异常处理测试接口

@ApiOperation(value = "测试异常",notes = "测试异常处理")
@RequestMapping(value = "/error",method = RequestMethod.GET)
public String error(){
    throw new RuntimeException("测试异常");
}
@ApiOperation(value = "测试异常",notes = "测试异常处理")
@RequestMapping(value = "/errora",method = RequestMethod.GET)
public String errora() throws Exception{
    throw new Exception();
}

                             在抛出exception异常时要先在方法上抛出异常，不然会报Exception没有被处理错误

4.运行，访问http://localhost:8080/user/error    http://localhost8080/user/errora