Java獲得當前項目的工作目錄，用戶主目錄

String userHome = System.getProperty("user.home");//用戶的主目錄System.out.println("userHome:   "+userHome);

String userDir = System.getProperty("user.dir");//項目的當前工作目錄
System.out.println("userDir:   "+userDir);

String userName = System.getProperty("user.name");//用戶的賬戶名稱
System.out.println("userName:   "+userName);

String fileSeparator = System.getProperty("file.separator");//文件分隔符,或可直接用File.separator獲得
System.out.println("fileSeparator :   "+fileSeparator);

String pathSeparator = System.getProperty("path.separator");//路徑分隔符
System.out.println("pathSeparator :   "+ pathSeparator);

輸出結果：

userHome:   C:\Users\wangyibo
userDir:   D:\IdeaProject\test
userName:   wangyibo
fileSeparator :   \
pathSeparator :   ;

Process finished with exit code 0

參考鏈接：   https://blog.51cto.com/jtech/2151930

                    http://www.yayihouse.com/yayishuwu/chapter/1114

//輸出所有properties
Properties props = System.getProperties();
props.list(System.out);