1. 全局异常的配置

1. 创建异常处理类

package com.test.spring_boot_demo.domain;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.web.bind.annotation.ExceptionHandler;

import org.springframework.web.bind.annotation.RestControllerAdvice;

import javax.servlet.http.HttpServletRequest;

import java.util.HashMap;

import java.util.Map;

@RestControllerAdvice

public class CustomExtHandler {

private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class);

// 捕获全局异常，处理所有不可知的异常

@ExceptionHandler(value = Exception.class)

// @ResponseBody

Object handleException(Exception e, HttpServletRequest request) {

LOG.error("url {}, msg {}", request.getRequestURL(), e.getMessage());

Map map = new HashMap<>();

map.put("code", "100");

map.put("msg", e.getMessage());

map.put("url", request.getRequestURL());

return map;

}

}

使用 @RestControllerAdvice 注解，可以不需要 @ResponseBody 注解

2. 创建controller接口

@GetMapping("/test/exception")

public Object testException() {

int n = 1/0;

return "test exception";

}

3. 访问测试

浏览器访问地址

http://localhost:8080/test/exception

返回结果

{"msg":"/ by zero","code":"100","url":"http://localhost:8080/test/exception"}

2. 触发异常返回自定义页面

1. 官网介绍

2. 添加模板引擎依赖

org.springframework.boot

spring-boot-starter-thymeleaf

3. 添加自定义异常类

package com.test.spring_boot_demo.domain;

public class MyException extends RuntimeException {

private String code;

private String msg;

public MyException(String code, String msg) {

this.code = code;

this.msg = msg;

}

public String getCode() {

return code;

}

public void setCode(String code) {

this.code = code;

}

public String getMsg() {

return msg;

}

public void setMsg(String msg) {

this.msg = msg;

}

}

4. 添加自定义异常监听器

@ExceptionHandler(value = MyException.class)

Object handleMyException(MyException e) {

ModelAndView modelAndView = new ModelAndView();

modelAndView.setViewName("error.html");

modelAndView.addObject("msg", e.getMessage());

return modelAndView;

}

5. 添加Http请求接口

@GetMapping("/test/myexception")

public Object myexc() {

throw new MyException("500", "my ext 异常");

}

6. 测试

测试：浏览器访问

http://localhost:8080/test/myexception

结果：跳转到新的页面

出异常 template