HTTP Status 404,该如何解决

HTTP Status 404HTTPStatus404-/defaultroot/index.jsp--------------------------------------------type

HTTP Status 404
HTTP   Status   404   -   /defaultroot/index.jsp

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type   Status   report

message   /defaultroot/index.jsp

description   The   requested   resource   (/defaultroot/index.jsp)   is   not   available.


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Apache   Tomcat/5.5.9

/defaultroot/index.jsp这个文件存在,怎么会找不到啊?

[解决办法]
web.xml里面检查过吗?配置是否正确,还有jsp文件的后面一定要加上 .jsp