标签：不可 code 错误 handler bind 全局 erro info template
1.SpringBoot2.x配置全局异常实战
讲解：服务端异常讲解和SpringBoot配置全局异常实战
1、默认异常测试 int i = 1/0，不友好
2、异常注解介绍
@ControllerAdvice 如果是返回json数据 则用 RestControllerAdvice,就可以不加 @ResponseBody
若使用@ControllerAdvice，则需要添加 @ResponseBody
//捕获全局异常,处理所有不可知的异常
@ExceptionHandler(value=Exception.class)
代码示例：
ExceptionController.java：
1 package net.xdclass.demo.controller; 2 3 import java.io.File; 4 import java.io.IOException; 5 import java.util.Date; 6 import java.util.UUID; 7 8 import javax.servlet.http.HttpServletRequest; 9 10 import net.xdclass.demo.domain.JsonData; 11 import net.xdclass.demo.domain.User; 12 13 import org.springframework.beans.factory.annotation.Value; 14 import org.springframework.context.annotation.PropertySource; 15 import org.springframework.stereotype.Controller; 16 import org.springframework.web.bind.annotation.RequestMapping; 17 import org.springframework.web.bind.annotation.RequestParam; 18 import org.springframework.web.bind.annotation.ResponseBody; 19 import org.springframework.web.bind.annotation.RestController; 20 import org.springframework.web.multipart.MultipartFile; 21 22 @RestController 23 public class ExceptionController { 24 25 @RequestMapping(value = "/api/v1/test_ext") 26 public Object index() { 27 int i = 1/0; 28 return new User(11, "asddasf", "123456", new Date()); 29 } 30 31 }
CustomExtHandler.java：
1 package net.xdclass.demo.domain; 2 3 import java.util.HashMap; 4 import java.util.Map; 5 6 import javax.servlet.http.HttpServletRequest; 7 8 import org.slf4j.Logger; 9 import org.slf4j.LoggerFactory; 10 import org.springframework.web.bind.annotation.ControllerAdvice; 11 import org.springframework.web.bind.annotation.ExceptionHandler; 12 import org.springframework.web.bind.annotation.ResponseBody; 13 import org.springframework.web.bind.annotation.RestControllerAdvice; 14 15 16 @RestControllerAdvice 17 public class CustomExtHandler { 18 19 private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class); 20 21 22 //捕获全局异常,处理所有不可知的异常 23 @ExceptionHandler(value=Exception.class) 24 //@ResponseBody 25 Object handleException(Exception e,HttpServletRequest request){ 26 LOG.error("url {}, msg {}",request.getRequestURL(), e.getMessage()); 27 Map<String, Object> map = new HashMap<>(); 28 map.put("code", 100); 29 map.put("msg", e.getMessage()); 30 map.put("url", request.getRequestURL()); 31 return map; 32 } 33 }
访问：http://localhost:8083/api/v1/test_ext
在浏览器中查看后台返回的json数据：
2、SpringBoot2.x配置全局异常返回自定义页面
简介：使用SpringBoot自定义异常和错误页面跳转实战
1、返回自定义异常界面，需要引入thymeleaf依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
2、resource目录下新建templates,并新建error.html
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("error.html");
modelAndView.addObject("msg", e.getMessage());
return modelAndView;
代码示例1——进行页面跳转：
MyException.java：
1 package net.xdclass.demo.domain; 2 3 /** 4 * 功能描述：自定义异常类 5 * 6 */ 7 public class MyException extends RuntimeException { 8 9 public MyException(String code, String msg) { 10 this.code = code; 11 this.msg = msg; 12 } 13 14 private String code; 15 private String msg; 16 public String getCode() { 17 return code; 18 } 19 public void setCode(String code) { 20 this.code = code; 21 } 22 public String getMsg() { 23 return msg; 24 } 25 public void setMsg(String msg) { 26 this.msg = msg; 27 } 28 29 }
CustomExtHandler.java：
1 package net.xdclass.demo.domain; 2 3 import java.util.HashMap; 4 import java.util.Map; 5 6 import javax.servlet.http.HttpServletRequest; 7 8 import org.slf4j.Logger; 9 import org.slf4j.LoggerFactory; 10 import org.springframework.web.bind.annotation.ExceptionHandler; 11 import org.springframework.web.bind.annotation.RestControllerAdvice; 12 import org.springframework.web.servlet.ModelAndView; 13 14 15 @RestControllerAdvice 16 public class CustomExtHandler { 17 18 private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class); 19 20 21 //捕获全局异常,处理所有不可知的异常 22 @ExceptionHandler(value=Exception.class) 23 Object handleException(Exception e,HttpServletRequest request){ 24 LOG.error("url {}, msg {}",request.getRequestURL(), e.getMessage()); 25 Map<String, Object> map = new HashMap<>(); 26 map.put("code", 100); 27 map.put("msg", e.getMessage()); 28 map.put("url", request.getRequestURL()); 29 return map; 30 } 31 32 33 34 /** 35 * 功能描述：处理自定义异常 36 * @return 37 */ 38 @ExceptionHandler(value=MyException.class) 39 Object handleMyException(MyException e,HttpServletRequest request){ 40 //进行页面跳转 41 ModelAndView modelAndView = new ModelAndView(); 42 modelAndView.setViewName("error.html"); 43 modelAndView.addObject("msg", e.getMessage()); 44 return modelAndView; 45 46 } 47 48 49 }
浏览器访问：http://localhost:8083/api/v1/myext
结果：
执行流程：
先访问controller，controller抛出异常，被CustomExtHandler.java中的@RestControllerAdvice监听到，根据异常的种类找到对应的Handler。
代码示例2——返回json数据：
1 /** 2 * 功能描述：处理自定义异常 3 * @return 4 */ 5 @ExceptionHandler(value=MyException.class) 6 Object handleMyException(MyException e,HttpServletRequest request){ 7 8 //返回json数据，由前端去判断加载什么页面（通常用作前后端分离开发） 9 Map<String, Object> map = new HashMap<>(); 10 map.put("code", e.getCode()); 11 map.put("msg", e.getMsg()); 12 map.put("url", request.getRequestURL()); 13 return map;
结果：
https://docs.spring.io/spring-boot/docs/2.1.0.BUILD-SNAPSHOT/reference/htmlsingle/#boot-features-error-handling
标签：不可 code 错误 handler bind 全局 erro info template
原文地址：https://www.cnblogs.com/116970u/p/10235878.html
