Several ways to get the project path in java

Get complete URl string in ava

 

 

[java]  view plain copy

 

1. HttpServletRequest httpRequest=(HttpServletRequest)request;  
2.           
3. String strBackUrl =  "http://"  + request.getServerName() //Server address  
4.                     + ":"   
5.                     + request.getServerPort()            //Port number  
6.                     + httpRequest.getContextPath()       //Project name  
7.                     + httpRequest.getServletPath()       //Request a page or other address  
8.                 + "?" + (httpRequest.getQueryString()); //参数  

 

 

 

 

 

 

1. The relative paths called in the jsp and class files are different. In jsp, the root directory is WebRoot In class files, the root directory is WebRoot/WEB-INF/classes Of course, you can also use System.getProperty( "user.dir" ) to get the absolute path of your project. (But I heard that it is not available under linux, not tested)
   

2. Another: How to get the path in detail in Jsp, Servlet, Java!

3. 1. Get the path in .jsp:

4. Take the project named TEST as an example:

5. ( 1 ) Get the full path of the current page containing the project name: request.getRequestURI()

6. Result: /TEST/test.jsp

7. ( 2 ) Get the project name: request.getContextPath()

8. Result: /TEST

9. ( 3 ) Get the full name of the directory where the current page is located: request.getServletPath()

10. Result: If the page is in the jsp directory /TEST/jsp/test.jsp

11. ( 4 ) Get the full path of the server where the page is located: application.getRealPath( "page.jsp" )

12. Result: D:\resin\webapps\TEST\test.jsp

13. (5)得到页面所在服务器的绝对路径：absPath=newjava.io.File(application.getRealPath(request.getRequestURI())).getParent();

14. 结果：D:\resin\webapps\TEST

15. 2.在类中取得路径：

16. (1)类的绝对路径：Class.class.getClass().getResource("/").getPath()

17. 结果：/D:/TEST/WebRoot/WEB-INF/classes/pack/

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

19. 结果：D:\TEST

20. 3.在Servlet中取得路径：

21. (1)得到工程目录：request.getSession().getServletContext().getRealPath("") 参数可具体到包名。

22. 结果：E:\Tomcat\webapps\TEST

23. (2)得到IE地址栏地址：request.getRequestURL()

24. 结果：http://localhost:8080/TEST/test

25. (3)得到相对地址：request.getRequestURI()

26. 结果：/TEST/test

struts2设置了struts.multipart.saveDir后会在根目录建立文件夹，这样会涉及linux下的权限问题，

最好不要设置，使用struts默认

需要使用路径时，用下面的方法取得项目根目录的绝对路径(Tools为方法类)

public static String getRootPath() {
String classPath = Tools.class.getClassLoader().getResource("/").getPath();
String rootPath = "";
//windows下
if("\\".equals(File.separator)){
rootPath = classPath.substring(1,classPath.indexOf("/WEB-INF/classes"));
rootPath = rootPath.replace("/", "\\");
}
//linux下
if("/".equals(File.separator)){
rootPath = classPath.substring(0,classPath.indexOf("/WEB-INF/classes"));
rootPath = rootPath.replace("\\", "/");
}
return rootPath;
}