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Servlet。映射规范？

[英]Servlet. Specification of Mappings?

原文 2012-01-03 12:29:30 1 1 java/ tomcat/ url-routing

Based on Java Servlet Specification Version 3.0 : 基于Java Servlet Specification Version 3.0 ：

In the Web application deployment descriptor, the following syntax is used to define mappings: 在Web应用程序部署描述符中，以下语法用于定义映射：

A string beginning with a '/' character and ending with '/*' suffix is used for path mapping. 以'/'字符开头并以'/ *'后缀结尾的字符串用于路径映射。

A string beginning with '*.' 以“ *”开头的字符串。 prefix is used as an extension mapping. 前缀用作扩展名映射。

A string containing only the '/' character indicates the "default" servlet of the application. 仅包含“ /”字符的字符串表示应用程序的“默认” servlet。

All other strings are used for exact matches only. 所有其他字符串仅用于完全匹配。

so, I have next questions: 所以，我有下一个问题：

How I can process this URL pattern: "/foo/bar/*.jsp"? 如何处理以下URL模式：“ / foo / bar / *。jsp”？
What principal difference between '/*' and '/'? “ / *”和“ /”之间的主要区别是什么？

Use less restrictive pattern (for example, /foo/bar/* ) and apply additional restrictions programmatically. 使用限制较少的模式（例如/foo/bar/* ），并以编程方式应用其他限制。
/ handles request only if its URL doesn't match any other mapping, whereas /* follows normal mapping precendence rules. /仅在其URL与任何其他映射都不匹配时才处理请求，而/*遵循常规映射优先规则。
For example, if you map front controller of your application as /* you won't be able to render JSP pages, because /* takes precendence over built-in JSP servlet mapped to *.jsp . 例如，如果将应用程序的前端控制器映射为/* ，则将无法呈现JSP页面，因为/*优先于映射到*.jsp内置JSP servlet。