15.Spring-Boot中使用AOP统一处理web层异常

在springboot错误默认是跳转到 请求返回渲染路径中的error/错误页面中。

源码分析：DefaultErrorViewResolver.java

private ModelAndView resolve(String viewName, Map<String, Object> model) {
String errorViewName = "error/" + viewName;
TemplateAvailabilityProvider provider = this.templateAvailabilityProviders
.getProvider(errorViewName, this.applicationContext);
if (provider != null) {
return new ModelAndView(errorViewName, model);
}
return resolveResource(errorViewName, model);
}

比如在application.properites中配置渲染页面为

#配置freemaker

spring.freemarker.template-loader-path=/WEB-INF/

如果不配置spring.freemarker.template-loader-path,springboot会在src/main/resources中的templates中的error文件下下找错误渲染的页面。

那么当出现错误时，系统会跳转到/WEB-INF/error/错误页面中。

​

使用AOP进行web层异常处理

package com.niugang.aop;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.ModelAndView;


/**
 * controller层统一异常处理
 * 
 * @author niugang
 *
 */
@Aspect

@Component

public class ExceptionControllerAscept {
private Logger logger = LoggerFactory.getLogger(ExceptionControllerAscept.class);
/**
* 匿名切点的方式
* 
* @param ex
* @throws ServletException
* @throws IOException
*/

@AfterThrowing(value = "execution(public * com.niugang.controller..*.*(..))", throwing = "ex")
public ModelAndView aroundAdvice(Exception ex) throws ServletException, IOException {
ModelAndView modelAndView = new ModelAndView();
RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
ServletRequestAttributes r = (ServletRequestAttributes) requestAttributes;
HttpServletRequest request = r.getRequest();
modelAndView.setViewName("500");
// 第一如果是 RuntimeException
if (ex instanceof RuntimeException) {
logger.error("抛出运行时异常{}", ex.getMessage());
modelAndView.addObject("exception", ex.getMessage());
// 跳转到错误页面
modelAndView.addObject("url", request.getRequestURL());
return modelAndView;
}
modelAndView.addObject("exception","未知异常");
return modelAndView;
}
}

       

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