Question

问一下在web.xml中配置<url-pattern>*.do</url-pattern>为什么在requestMapping中可不加.do

问一下在web.xml中配置<url-pattern>*.do</url-pattern>为什么在requestMapping中可不加.do
web.xml中配置<url-pattern>*.do</url-pattern>
假设页面请求 http:localhost:8080/index.do
springmvc拦截请求
controller：
@requestMapping("index")
public String index(){
return "index";

}
请问springMVC中是如何将实现映射的（controller中不是应该也写@requestMapping("index.do")吗）

Answer 1

web.xml中配置了url-pattern后，会起到两个作用，1个是限制url的后缀名，只能为".do"，另一个就是在没有填写后缀时，默认添加你配置的".do"的后缀。

Answer 2

指定特定后缀名的mime类型,好让该后缀名的文件被安全传输到客户端.
配置的示例：
<mime-mapping>
<extension>doc</extension>
<mime-type>application/msword</mime-type>
</mime-mapping>
<mime-mapping>
<extension>xls</extension>
<mime-type>application/msexcel</mime-type>
</mime-mapping>
<mime-mapping>
<extension>pdf</extension>
<mime-type>application/pdf</mime-type>
</mime-mapping>
<mime-mapping>
<extension>zip</extension>
<mime-type>application/zip</mime-type>
</mime-mapping>
<mime-mapping>
<extension>rar</extension>
<mime-type>application/rar</mime-type>
</mime-mapping>
<mime-mapping>
<extension>txt</extension>
<mime-type>application/txt</mime-type>
</mime-mapping>
<mime-mapping>
<extension>chm</extension>
<mime-type>application/mshelp</mime-type>
</mime-mapping>

追问

你这个好像不是我要的答案哎