SpringMVC全局异常处理的三种方式

<bean class="org.springframework.web.servlet.handler.SimpleMappingException Resolver">
  <property name="defaultErrorView" value="error"></property>
  <property name="exceptionAttribute" value="ex"></property>
  <property name="exceptionMappings">
    <props>
      <prop key="com.xxx.exception.BusinessException">error1</prop>
      <prop key="com.xxx.exception.ParamsException">error2</prop>
    </props>
  </property>
</bean>

@Component
public class GlobalException implements HandlerExceptionResolver {
  @Override
  public ModelAndView resolveException(HttpServletRequest request,
    HttpServletResponse response, Object handler, Exception ex) {
      Map<String,Object> map=new HashMap<String, Object>();
      map.put("ex", ex);
      ModelAndView mv=null;
      if(ex instanceof ParamsException){
      	return new ModelAndView("error_param", map);
      }
      if(ex instanceof BusinessException){
      	return new ModelAndView("error_business", map);
      }
    return new ModelAndView("error", map);
  } 
}

public class BaseController {
  @ExceptionHandler
  public String exc(HttpServletRequest request,HttpServletResponse
  response,Exception ex){
    request.setAttribute("ex", ex);
    if(ex instanceof ParamsException){
      return "error_param"; 
    }
    if(ex instanceof BusinessException){
      return "error_business"; 
    }
    return "error";
  } 
}