获取当前类的所在工程路径; 如果不加“/” file f = new file(this.getclass().getresource("").getpath()); system.out.println(f); 结果：c:\documents%20and%20settings\administrator\workspace\projectname\bin\com\test 获取当前类的绝对路径； 第二种：file directory = new file("");//参数为空 string coursefile = directory.getcanonicalpath() ; system.out.println(coursefile); 结果：c:\documents and settings\administrator\workspace\projectname 获取当前类的所在工程路径; 第三种：url xmlpath = this.getclass().getclassloader().getresource("selected.txt"); system.out.println(xmlpath); 结果：file:/c:/documents%20and%20settings/administrator/workspace/projectname/bin/selected.txt 获取当前工程src目录下selected.txt文件的路径 第四种：system.out.println(system.getproperty("user.dir")); 结果：c:\documents and settings\administrator\workspace\projectname 获取当前工程路径第五种：system.out.println( system.getproperty("java.class.path")); 结果：c:\documents and settings\administrator\workspace\projectname\bin 获取当前工程路径