springmvc的ModelAndViewMethodReturnValueHandler解析_晏无心_新浪博客

淡淡的烟草味﹌ 2022-12-20 15:50 45阅读 0赞

来看supportsReturnType()方法：

[![springmvc的ModelAndViewMethodReturnValueHandler解析][springmvc_ModelAndViewMethodReturnValueHandler]][springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler]  
支持返回值类型是ModelAndView。

handleReturnValue()方法：

[![springmvc的ModelAndViewMethodReturnValueHandler解析][springmvc_ModelAndViewMethodReturnValueHandler 1]][springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler 1]  
直接将handler返回值转换成ModelAndView类型，判断mav的view是否是String类型：

[![springmvc的ModelAndViewMethodReturnValueHandler解析][springmvc_ModelAndViewMethodReturnValueHandler 2]][springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler 2]  
分别做处理，将view或viewName设置到mavContainer，同时判断是否是重定向，做相应处理。

来看具体的handler：

[![springmvc的ModelAndViewMethodReturnValueHandler解析][springmvc_ModelAndViewMethodReturnValueHandler 3]][springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler 3]  
  
[![springmvc的ModelAndViewMethodReturnValueHandler解析][springmvc_ModelAndViewMethodReturnValueHandler 4]][springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler 4]

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[springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler 1]: /images/20221120/60fc06a8834341dbb3f6c70a8a73c04c.png
[springmvc_ModelAndViewMethodReturnValueHandler 2]: https://img-blog.csdnimg.cn/img_convert/a64845b133c225967357b9748af66c50.png
[springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler 2]: http://album.sina.com.cn/pic/004dzziXzy7lsxe1jzG28
[springmvc_ModelAndViewMethodReturnValueHandler 3]: https://img-blog.csdnimg.cn/img_convert/cc2d470d2d77e27cfedc695fa2764dd8.png
[springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler 3]: http://album.sina.com.cn/pic/004dzziXzy7lsxpb5oXb7
[springmvc_ModelAndViewMethodReturnValueHandler 4]: https://img-blog.csdnimg.cn/img_convert/30dba7ec5608eb1040a5b671dff142a4.png
[springmvc_ModelAndViewMethodReturnValueHandler_springmvc_ModelAndViewMethodReturnValueHandler 4]: http://album.sina.com.cn/pic/004dzziXzy7lsxpadwSca