request.getRequestURL()和request.getRequestURI()

理解getRequestURI与getRequestURL

最新推荐文章于 2025-08-04 11:54:48 发布

astro_boy

最新推荐文章于 2025-08-04 11:54:48 发布

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分类专栏： Server 文章标签： JSP Servlet Scheme Web UP

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本文解析了在Java Web开发中，HttpServletRequest接口中方法 getRequestURI() 和 getRequestURL() 的区别及应用场景。前者获取请求行中的资源标识符部分，未经过解码；后者则重构整个客户端用于发出请求的URL，但不包含查询字符串参数。

先申明,我是自己琢磨出来的,不知道对不对!!
但是,我想应该不会有太大的出入的!
getRequestURI()就相当于你在写一个JSP页面的时候会有这样的东西"action='/WebRoot/xxx'"这个方法就是获得'/WebRoot/xxx',也就是说它会得到一个相对地址
而getRequestURL()会得到一个完整的URL地址,也就是绝对的绝对地址

Request.getRequestURL返回的是请求的全部，包括Http协议，端口号，servlet名字和映射路径，但它不包含请求参数。
request.getRequestURI得到的是request URL的部分值，并且web容器没有decode过的

Java code

getRequestURL： public java.lang.StringBuffer getRequestURL() Reconstructs the URL the client used to make the request. The returned URL contains a protocol, server name, port number, and server path, but it does not include query string parameters. Because this method returns a StringBuffer, not a string, you can modify the URL easily, for example, to append query parameters. This method is useful for creating redirect messages and for reporting errors. Returns: a StringBuffer object containing the reconstructed URL getRequestURI： public java.lang.String getRequestURI() Returns the part of this request's URL from the protocol name up to the query string in the first line of the HTTP request. The web container does not decode this String. For example: First line of HTTP request Returned Value POST /some/path.html HTTP/1.1 /some/path.html GET http://foo.bar/a.html HTTP/1.0 /a.html HEAD /xyz?a=b HTTP/1.1 /xyz To reconstruct an URL with a scheme and host, use HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest). Returns: a String containing the part of the URL from the protocol name up to the query string See Also: HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest)

request.getRequestURI() /jqueryWeb/resources/request.jsp
request.getRequestURL() http://localhost:8080/jqueryWeb/resources/request.jsp
request.getContextPath()/jqueryWeb
request.getServletPath()/resources/request.jsp

注： resources为WebContext下的目录名
jqueryWeb 为工程名