springboot 常用的异常处理方式

springboot常用的异常处理推荐：

一.创建一个异常控制器，并实现ErrorController接口：

package com.example.demo.controller;

import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class BaseErrorController implements ErrorController {

	@Override
	public String getErrorPath() {
		return "/error/error";
	}
	
	@RequestMapping("/error")
	public String getError() {
		return getErrorPath();
	}

}

　　当系统内发生错误后会跳转到error页面。

二.创建一个异常句柄ErrorExceperHandler

package com.example.demo.handler;

import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.servlet.ModelAndView;

@ControllerAdvice
public class ErrorExceperHandler {

	@ExceptionHandler
	@ResponseStatus(HttpStatus.OK)
	public ModelAndView processException(Exception exception) {
		ModelAndView modelAndView = new ModelAndView();
		modelAndView.addObject("exception", exception.getMessage());
		modelAndView.setViewName("/error/error");
		return modelAndView;
	}
	
	@ExceptionHandler
	@ResponseStatus(HttpStatus.OK)
	public ModelAndView processException(RuntimeException exception) {
		ModelAndView modelAndView = new ModelAndView();
		modelAndView.addObject("exception", exception.getMessage());
		modelAndView.setViewName("/error/error");
		return modelAndView;
	}
}

　　重载方法针对Exception和RuntimeException进行拦截，当系统发生异常后，会跳转到异常页面。

package com.example.demo.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.example.demo.entity.Student;

@Controller
@RequestMapping("/student/")
public class StudentController {
	
	@RequestMapping("show")
	public String show(Model model) throws Exception {
		
		Student stu = new Student();
		stu.setId(1001);
		stu.setName("小明");
		model.addAttribute("student", stu);
		
		if (!"a".equals("")) {
			throw new RuntimeException("RuntimeException....");
		}
		
		if (!"a".equals("")) {
			throw new Exception("Exception....");
		}
		
		return "show";
	}

}

　　在做spring或springboot开发的时候推荐使用第二种。