JavaWeb项目中各种路径的获取

以工程名为/DemoWeb为例:

访问的jsp为: http://localhost:8080/DemoWeb/test/index.jsp 


1 JSP中获得当前应用的相对路径和绝对路径 
(1)得到工程名:request.getContextPath() 
结果:/DemoWeb 

(2)得到包含工程名的当前页面全路径:request.getRequestURI() 
结果:/DemoWeb/test/testpath.jsp 

(3)得到IE地址栏地址:request.getRequestURL() 
结果:http://localhost:8080/DemoWeb/test/testpath.jsp 


(4)得到当前页面所在目录下全名称:request.getServletPath() 
结果:/test/testpath.jsp 

(5)得到页面所在服务器的全路径(实际的路径):application.getRealPath("testpath.jsp") 
结果:D:Develop Filesapache-tomcat-5.5.15apache-tomcat-5.5.15webappsDemoWeb estpath.jsp 
D:Develop Filesapache-tomcat-5.5.15apache-tomcat-5.5.15为tomcat的安装路径 

(6) Web应用中有各种获取path或URI,URL的方法,假设网页访问地址:

http://localhost:8080/tradeload/TestServlet

Web应用context: /tradeload 

    request.getContextPath()= /tradeload   
    request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()= http://localhost:8080   
    request.getRequestURL() = http://localhost:8080/tradeload/TestServlet   
    request.getRequestURI() = /tradeload/TestServlet   
    request.getPathInfo() = null   
    request.getServletPath() = /TestServlet   
    getServletContext().getRealPath('/') = C:serverglassfishdomainsdomain1applicationsj2ee-modules	radeload

2.java 的Class中获得相对路径,绝对路径的方法 

(1)类的绝对路径: 

System.out.println(TestPath.class.getResource("/").getPath()); 
结果:/E:/workspace/workspace_tcc/DemoWeb/WebRoot/WEB-INF/classes/ 
System.out.println(TestPath.class.getResource("")); 
结果:file:/E:/workspace/workspace_tcc/DemoWeb/WebRoot/WEB-INF/classes/demo1/ 


(2)得到工程的路径:System.getProperty("user.dir") 

结果:E:workspaceworkspace_tccDemoWeb 

(3)得到项目部署的绝对路径:

//获取运行项目名称

WebApplicationContext wac = ContextLoader.getCurrentWebApplicationContext();
ServletContext sc =wac.getServletContext();
String projectName = sc.getContextPath();

//获取运行项目路径 即tomcat下的项目路径(默认情况下)
//tomcat conf server.xml配置文件若有配置项目路径<Context path="" docBase="D:seed" reloadable="false" />,则是该docBase的路径

WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
ServletContext servletContext = webApplicationContext.getServletContext();
String projectPath=servletContext.getRealPath("/").replace("\", "/");
原文地址:https://www.cnblogs.com/yzuzhang/p/5822599.html