request获取各种路径总结
从request获取各种路径总结：request.getRealPath("url");//虚拟目录映射为实际目录
request.getRealPath("./");//网页所在的目录
request.getRealPath("../");//网页所在目录的上一层目录
假定你的web application(web应用)名称为news，你的浏览器中输入请求路径：
http://localhost:8080/uploading/load.jsp
request.getContextPath() => /uploading
request.getServletPath() => /load.jsp
request.getRequestURL() => http://localhost:8080/uploading/load.jsp
request.getRealPath("/") => F:\learn\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\uploading\
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