行分隔符在windows 下是 \r\n，在Linux下面是 \n， 在Mac下是 \r 路径分隔符在windows下是 \ ，在LInux下是 /

import java.util.Properties; public class SeparatorUtils {     /* system properties to get separators */     static final Properties PROPERTIES = new Properties(System.getProperties());     /**      * get line separator on current platform      * @return line separator      */     public static String getLineSeparator(){         return PROPERTIES.getProperty("line.separator");     }     /**      * get path separator on current platform      * @return path separator      */     public static String getPathSeparator(){         return PROPERTIES.getProperty("path.separator");     } } class SeparatorUtilTest{     public static void main (String[] args){         System.out.println("Line separator is: " + SeparatorUtils.getLineSeparator());         System.out.println("Path separator is: " + SeparatorUtils.getPathSeparator());     } }