一、用Jsp获取1、获取文件的绝对路径String file="文件";（例如：data.mdb）String path=application.getRealPath(file);结果：E:\java_web\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\myWebsite\文件2、获取文件的绝对路径String p2=request.getRequestURI();结果：E:\java_web\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\myWebsite\文件3、获取当前jsp页面的路径String p3=request.getContextPath(); 结果：/myWebsite/index.jsp4、获取当前项目的路径String p4=request.getServletPath(); 结果：/myWebsite二、用Java类获取1、获取Eclipse路径String a1=System.getProperty("user.dir");结果：D:\StudySystem\JavaWeb\3-eclipse-jee-indigo-win32\eclipse2、获取当前的classpath路径String a2=类名.class.getResource("").toString();String a3=DBConnection.class.getResource("/").toString();String a4=DBConnection.class.getClassLoader().getResource("").toString();String t=Thread.currentThread().getContextClassLoader().getResource("").getPath();打印出来分别是：file:/E:/java_web/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/myWebsite/WEB-INF/classes/com/site/db/file:/E:/java_web/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/myWebsite/WEB-INF/classes/file:/E:/java_web/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/myWebsite/WEB-INF/classes//E:/java_web/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/myWebsite/WEB-INF/classes/3、获取文件的绝对路径如果要获取WebContent目录下的文件绝对路径怎么办？可以用下面的方法String t=Thread.currentThread().getContextClassLoader().getResource("").getPath(); int num=t.indexOf(".metadata");String path=t.substring(1,num).replace('/', '\\')+"项目名\\WebContent\\文件";结果是：E:\java_web\workspace\项目名\WebContent\文件三、用servlet获取1、获取项目的绝对路径request.getSession().getServletContext().getRealPath("")结果：E:\java_web\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\myWebsite2、获取浏览器地址request.getRequestURL()结果：http://localhost:8080/myWebsite/QuestionServlet3、获取当前文件的绝对路径request.getSession().getServletContext().getRealPath(request.getRequestURI())结果：E:\java_web\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\myWebsite\myWebsite\QuestionServlet
