spring异常处理

spring异常处理基本有3种方式：

1、继承SimpleMappingExceptionResolver类；

applicationContext.xml中添加

<bean class="cn.px.hq.web.resolver.GenericExceptionResolver">
		<property name="order" value="0"></property>
		<property name="exceptionMappings">
			<props>
				<prop key="java.lang.Throwable">error/500</prop>
				<prop key="org.apache.shiro.authz.AuthorizationException">error/403</prop>
			</props>
		</property>
	</bean>

或者通过注解@Component实现

实现类GenericExceptionResolver：

 protected ModelAndView doResolveException(HttpServletRequest request,
      HttpServletResponse response, Object handler, Exception ex) {
 ModelAndView modelAndView = null;
 modelAndView = super.doResolveException(request, response, handler, ex);
      if (modelAndView != null) {
        Map<String, Object> model = modelAndView.getModel();
        model.put("errorCode", exception.getErrorCode().getNumber());
        model.put("errorInfo", exception.getErrorInfo());
        model.put("data", exception.getProperties());
        model.put("message", exception.getMessage());
        model.put("stackTrace", exception.getStackTraceAsString()); // 设置异常信息
      }
 return modelAndView;
  }

2、实现接口HandlerExceptionResolver ；

applicationContext.xml中增加以下内容：

<bean id="exceptionHandler" class="cn.basttg.core.exception.实现类"/>

实现类代码实现：

public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler,  
            Exception ex) {  
        Map<String, Object> model = new HashMap<String, Object>();  
        model.put("ex", ex);  
          
        // 根据不同错误转向不同页面  
        if(ex instanceof BusinessException) {  
            return new ModelAndView("error-business", model);  
        }else if(ex instanceof ParameterException) {  
            return new ModelAndView("error-parameter", model);  
        } else {  
            return new ModelAndView("error", model);  
        }  
    }  

3、@ExceptionHandler注解实现；

/** 基于@ExceptionHandler异常处理 */  
    @ExceptionHandler  
    public String exp(HttpServletRequest request, Exception ex) {  
          
        request.setAttribute("ex", ex);  
          
        // 根据不同错误转向不同页面  
        if(ex instanceof BusinessException) {  
            return "error-business";  
        }else if(ex instanceof ParameterException) {  
            return "error-parameter";  
        } else {  
            return "error";  
        }  
    }