举例:String
fName =” G:\Java_Source\navigation_tigra_menu\demo1\img\lev1_arrow.gif ”
方法一:
    
        
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 | File tempFile =new File( fName.trim());
 String fileName = tempFile.getName();
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方法二:
    
        
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 | String fName = fName.trim();
 String fileName = fName.subString(fName.lastIndexOf("/")+1);
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方法三:
    
        
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 | String fName = fName.trim();
 String temp[] = fName.split("\\\\"); /**split里面必须是正则表达式,"\\"的作用是对字符串转义*/
 
 String fileName = temp[temp.length-1];
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