spring mvc 异常状态

标签：spring mvc 异常状态

1.mappedHandler找不到

response.sendError(HttpServletResponse.SC_NOT_FOUND);

spring mvc异常机制

1.mappedHandler找不到 并且throwExceptionIfNoHandlerFound设定为true

throwExceptionIfNoHandlerFound

source:

				if (this.throwExceptionIfNoHandlerFound) {
					throw new NoHandlerFoundException(request.getMethod(), getRequestUri(request),
							new ServletServerHttpRequest(request).getHeaders());
				}
				else {
					response.sendError(HttpServletResponse.SC_NOT_FOUND);
				}

config:

web.xml的配置Dispatcher的此参数为true

					<init-param>
						<param-name>throwExceptionIfNoHandlerFound</param-name>
						<param-value>true</param-value>
					</init-param>

2.判断返回视图层之前是否发生了异常，主要有两种HandlerExceptionResolver、ModelAndViewDefiningException

3.如没有异常，则进行视图渲染

通过viewResolver找出相应的view，进行具体的模板渲染

通过不同的View实现AbstractView的renderMergedOutputModel方法

Exception if there's a problem rendering the view

如果ViewResolver匹配不到对应的View，则抛出ServletException

ServletException：if view is missing or cannot be resolved

spring mvc 异常处理

1.HandlerExceptionResolver

只能处理请求过程中抛出的异常

不处理异常处理本身所抛出的异常和视图解析过程中抛出的异常

2.@ControllerAdvice的@ExceptionHandler注解

spring mvc 异常状态

标签：spring mvc 异常状态

原文地址：http://blog.51cto.com/xinzhilian/2054184