Java에서 Java 파일의 경로를 작성하는 방법

//利用System.getProperty()函数获取当前路径 System.out.println(System.setProperty("user.dir", "c:users")); System.out.println(System.getProperty("user.dir"));//user.dir指定了当前的路径 //在类中取得类的绝对路径 System.out.println(Class.class.getClass().getResource("/").getPath()); System.out.println(Thread.currentThread().getContextClassLoader().getResource("./").getPath()); System.out.println(Thread.currentThread().getContextClassLoader().getResource("").getPath());//ClassPath的绝对URI路径 System.out.println(Thread.currentThread().getContextClassLoader().getResource(".").getPath());//项目的绝对路径

File directory = new File("");//设定为当前文件夹 try{ 　　System.out.println(directory.getCanonicalPath());//获取标准的路径 System.out.println(directory.getAbsolutePath());//获取绝对路径 }catch(Exceptin e){ }

File directory = new File("abc"); directory.getCanonicalPath();//得到的是C:/test/abc directory.getAbsolutePath();//得到的是C:/test/abc direcotry.getPath();//得到的是abc File directory = new File("."); directory.getCanonicalPath();//得到的是C:/test directory.getAbsolutePath();//得到的是C:/test/. direcotry.getPath(); //得到的是. File directory = new File(".."); directory.getCanonicalPath(); //得到的是C:/ directory.getAbsolutePath(); //得到的是C:/test/.. direcotry.getPath(); //得到的是..

java.version Java Runtime Environment version java.vendor Java Runtime Environment vendor java.vendor.url Java vendor URL java.home Java installation directory java.vm.specification.version Java Virtual Machine specification version java.vm.specification.vendor Java Virtual Machine specification vendor java.vm.specification.name Java Virtual Machine specification name java.vm.version Java Virtual Machine implementation version java.vm.vendor Java Virtual Machine implementation vendor java.vm.name Java Virtual Machine implementation name java.specification.version Java Runtime Environment specification version java.specification.vendor Java Runtime Environment specification vendor java.specification.name Java Runtime Environment specification name java.class.version Java class format version number java.class.path Java class path java.library.path List of paths to search when loading libraries java.io.tmpdir Default temp file path java.compiler Name of JIT compiler to use java.ext.dirs Path of extension directory or directories os.name Operating system name os.arch Operating system architecture os.version Operating system version file.separator File separator ("/" on UNIX) path.separator Path separator (":" on UNIX) line.separator Line separator ("/n" on UNIX) user.name User’s account name user.home User’s home directory user.dir User’s current working directory

//得到包含工程名（工程名为TEST）的当前页面全路径：request.getRequestURI() 结果：/TEST/test.jsp //得到工程名：request.getContextPath() 结果：/TEST //得到当前页面所在目录下全名称：request.getServletPath() 结果：如果页面在jsp目录下 /TEST/jsp/test.jsp //得到页面所在服务器的全路径：application.getRealPath("页面.jsp") 结果：D:/resin/webapps/TEST/test.jsp //得到页面所在服务器的绝对路径：absPath=new java.io.File(application.getRealPath(request.getRequestURI())).getParent(); 结果：D:/resin/webapps/TEST

//得到工程目录：request.getSession().getServletContext().getRealPath("") 参数可具体到包名。 结果：E:/Tomcat/webapps/TEST //得到url地址栏地址：request.getRequestURL() 结果：http://localhost:8080/TEST/test //得到相对地址：request.getRequestURI() 结果：/TEST/test