springboot2.0 对异常的处理

1.对所有异常进行处理

package com.springboot2.thyemleaf.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Created by  lpw'ASUS on 2018/5/28.
 */
@Controller
@RequestMapping(value = "error")
public class ErrorBaseeController implements ErrorController {

    private static final Logger log = LoggerFactory.getLogger(ErrorBaseeController.class);
    @Override
    public String getErrorPath() {
        log.info("出错了进入自定义错误控制器");
        return "error/error";
    }

    @RequestMapping
    public String error(){
        return getErrorPath();
    }

}

实现errorController类，

当有异常的时候，在配置好的路径下找到error.html

结果

2.直接自定义错误页面，

在resources下面创建文件夹public，在里面创建404.html,

当报404错误的时候就会跳入。

3.通过控制器来自定义异常，统一的异常处理。

package com.springboot2.thyemleaf.handler;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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;

/**
 * Created by  lpw'ASUS on 2018/5/28.
 *
 * @ControllerAdvice 控制器的通知
 */
@ControllerAdvice
public class ErrorExceptionHandle {

    private static final Logger log = LoggerFactory.getLogger(ErrorExceptionHandle.class);

    @ExceptionHandler
    @ResponseStatus(HttpStatus.OK)
    public ModelAndView processException(Exception e){
        log.info("----自定义异常处理 ---- exception---");

        ModelAndView m =new ModelAndView();
        m.addObject("zdyException",e.getMessage());
        m.addObject("b","王五");
        m.setViewName("error/error");
        return m;
    }

    @ExceptionHandler
    @ResponseStatus(HttpStatus.OK)
    public ModelAndView processException(RuntimeException e){
        log.info("----自定义RuntimeException异常处理 ---- exception---");

        ModelAndView m =new ModelAndView();
        m.addObject("zdyException",e.getMessage());
        m.addObject("a","zhansan");
        m.setViewName("error/runtime");
        return m;
    }

}

可以处理不同的异常，然后返回到指定的页面，进行处理。页面放在配置的模板路径下面。

package com.springboot2.thyemleaf.controller;

import com.springboot2.thyemleaf.entity.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by  lpw'ASUS on 2018/5/28.
 */
@Controller
@RequestMapping("/thyemleaf")
public class ThymeleafController {

    @RequestMapping("demo")
    public String testthymeleaf(Model model)throws Exception{
        model.addAttribute("str","hello springboot2.0 -thymeleaf");
        User user = new User("张三",23);
        User user1 = new User("王五",46);
        model.addAttribute("user",user);
        List<User> list=new ArrayList<User>();
        list.add(user);
        list.add(user1);
        model.addAttribute("list",list);
        System.out.print(2525);
        System.out.print(5212);

        model.addAttribute("imgsrc","/img/1.jpg");
        if(true){
            throw new Exception("非运行时异常");
        }
        return "template";
    }
}

相互学习，重在交流。