1. request.getRequestURI()  ->  /distributor/checkCaseName/123123
    2.     request.getRequestURL()  ->  http://localhost:8080/distributor/checkCaseName/123123
    4. request.getServletContext().getRealPath("/")  ->
    5.     /Users/tonnyyi/workspace/CT/simulate-partner/simulate-distributor/target/simulate-distributor-1.0/
    6. request.getServletContext().getRealPath(request.getRequestURI())  ->  
    7.     /Users/tonnyyi/workspace/CT/simulate-partner/simulate-distributor/target/simulate-distributor-1.0/distributor/checkCaseName/123123
    9. request.getServletPath()  -> /checkCaseName/123123
    11. request.getSession().getServletContext().getRealPath("/")  -> 
    12.     /Users/tonnyyi/workspace/CT/simulate-partner/simulate-distributor/target/simulate-distributor-1.0/
    14. Thread.currentThread().getContextClassLoader().getResource("")  -> 
    15.     file:/Users/tonnyyi/workspace/CT/simulate-partner/simulate-distributor/target/simulate-distributor-1.0/WEB-INF/classes/
    17. DispatcherServlet.class.getClassLoader().getResource("")  -> 
    18.     file:/Users/tonnyyi/workspace/CT/simulate-partner/simulate-distributor/target/simulate-distributor-1.0/WEB-INF/classes/
    20. DispatcherServlet.class.getResource("")  -> 
    21.     jar:file:/Users/tonnyyi/workspace/CT/simulate-partner/simulate-distributor/target/simulate-distributor-1.0/WEB-INF/lib/spring-webmvc-4.2.3.RELEASE.jar!/org/springframework/web/servlet/
    23. DispatcherServlet.class.getResource("/")  -> 
    24.     file:/Users/tonnyyi/workspace/CT/simulate-partner/simulate-distributor/target/simulate-distributor-1.0/WEB-INF/classes/
    26. new File("/").getAbsolutePath() -> /
    28. System.getProperty("user.dir")  -> /Applications/apache-tomcat-8.0.26/bin
    30. # 摘自spring boot org.springframework.boot.loader.Launcher#createArchive
    31. CodeSource codeSource = getClass().getProtectionDomain().getCodeSource();
    32. URI location = (codeSource != null) ? codeSource.getLocation().toURI() : null;
    33. String path = (location != null) ? location.getSchemeSpecificPart() : null;
    34. System.out.println(path);