servlet中获得路径

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以下是HandleUpload这个servlet中输出的结果，该文件属于FileSystem这个app

System.out.println("1. request.getContextPath()="+request.getContextPath());System.out.println("2. request.getLocalAddr()="+request.getLocalAddr());System.out.println("3. request.getRequestURL()="+request.getRequestURL());System.out.println("4. request.getRequestURI()="+request.getRequestURI());System.out.println("5. request.getServletPath()="+request.getServletPath());System.out.println("6. request.getRealPath('') ="+request.getRealPath(""));System.out.println("7. System.getProperty('user.dir')="+System.getProperty("user.dir"));System.out.println("8. getServletContext().getContextPath()="+getServletContext().getContextPath());System.out.println("9. getServletContext().getRealPath('/')="+getServletContext().getRealPath("/"));System.out.println("10.getClass().getClassLoader().getResource('/').getPath()="+getClass().getClassLoader().getResource("/").getPath());

1. request.getContextPath()=/FileSystem
2. request.getLocalAddr() =192.168.253.1
3. request.getRequestURL() =http://192.168.253.1:8080/FileSystem/HandleUpload
4. request.getRequestURI() =/FileSystem/HandleUpload
5. request.getServletPath()=/HandleUpload
6. request.getRealPath('') =null
7. System.getProperty('user.dir')=D:\Program Files\tomcat-8.0.0\bin
8. getServletContext().getContextPath()=/FileSystem
9. getServletContext().getRealPath('/')=D:\Program Files\tomcat-8.0.0\webapps\FileSystem
10.getClass().getClassLoader().getResource('/').getPath()=/D:/Program%20Files/tomcat-8.0.0/webapps/FileSystem/WEB-INF/classes/

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