@ControllerAdvice配置讲解:
package cn.org.spring.wechar.exception; import cn.org.spring.wechar.bean.Result; import lombok.extern.slf4j.Slf4j; 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.ResponseBody; import org.springframework.web.bind.annotation.ResponseStatus; /** * @author: 谢辉 * @date: 2021/5/20 * @email: xieh_mail@163.com * @description: 集中处理所有controller异常 * @modifiedBy: * @version: 1.0 */ @Slf4j @ControllerAdvice(basePackages = "cn.org.spring.wechar") public class ExceptionControllerAdvice { /** * 响应json数据 * @param throwable * @return */ @ResponseBody @ExceptionHandler(value = Exception.class) @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR) public Result handleException(Exception throwable) { log.error("错误异常{}", throwable); return Result.fail("发生未知错误,稍后在试~"); } /** * 跳转页面 * @param throwable * @return */ @ExceptionHandler(value = Exception.class) @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR) public String handle(Exception throwable) { log.error("错误异常{}", throwable); return "error/500"; } }
错误页面配置:
package cn.org.spring.wechar.config; import org.springframework.boot.web.server.ErrorPage; import org.springframework.boot.web.server.ErrorPageRegistrar; import org.springframework.boot.web.server.ErrorPageRegistry; import org.springframework.http.HttpStatus; import org.springframework.stereotype.Component; /** * @author: 谢辉 * @date: 2021/5/20 * @email: xieh_mail@163.com * @description: 错误页面配置 * @modifiedBy: * @version: 1.0 */ @Component public class ErrorPageConfig implements ErrorPageRegistrar { @Override public void registerErrorPages(ErrorPageRegistry registry) { //1、按错误的类型显示错误的网页 //错误类型为404,找不到网页的,默认显示404.html网页 ErrorPage e404 = new ErrorPage(HttpStatus.NOT_FOUND, "/common/error/404"); //错误类型为500,表示服务器响应错误,默认显示500.html网页 ErrorPage e500 = new ErrorPage(HttpStatus.INTERNAL_SERVER_ERROR, "/common/error/500"); registry.addErrorPages(e404, e500); } }
package cn.org.spring.wechar.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; /** * @author: 谢辉 * @date: 2021/5/20 * @email: xieh_mail@163.com * @description: * @modifiedBy: * @version: 1.0 */ @Controller @RequestMapping("/common") public class CommonController { @RequestMapping("/error/404") public String error404() { return "error/404"; } @RequestMapping("/error/500") public String error500() { return "error/500"; } }
注意:
@ControllerAdvice可以捕捉服务器内部错误例如5xx之类的错误或者自定义的异常,可以选择响应json数据或者跳转页面,但是例如404之类的错误是捕捉不到的。
ErrorPageRegistrar接口配置错误页面也可以响应json数据,或者跳转页面,ErrorPageRegistrar可以捕捉404之类和500之类的错误范围更广,但是无法捕获自定义异常。
如果@ControllerAdvice和ErrorPageRegistrar同时捕捉500错误,@ControllerAdvice优先级比ErrorPageRegistrar高。
总结:
@ControllerAdvice可以捕捉自定义异常和服务器500之类的异常,但是404之类的是捕获不到的
ErrorPageRegistrar可以捕获500服务器错误或者404之类的错误,但是无法捕获自定义异常
相同配置时@ControllerAdvice优先级比ErrorPageRegistrar高