java获取文件名的三种方法

原文地址: http://rogerfederer.iteye.com/blog/1187798



import java.io.File;
import java.util.Arrays;

public class FileName {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
//		举例:
		String fName =" G:\\Java_Source\\navigation_tigra_menu\\demo1\\img\\lev1_arrow.gif ";

//		方法一:

		File tempFile =new File( fName.trim());
		
		String fileName = tempFile.getName();
		
		System.out.println("方法一:fileName = " + fileName);

//		方法二:

		fName = fName.trim();

//		fileName = fName.substring(fName.lastIndexOf("/")+1);
//		或者
		fileName = fName.substring(fName.lastIndexOf("\\")+1);
		
		System.out.println("方法二:fileName = " + fileName);

//		方法三:

		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*/

		//temp[] = [G:, Java_Source, navigation_tigra_menu, demo1, img, lev1_arrow.gif]
		System.out.println("temp[] = " + Arrays.toString(temp));
		fileName = temp[temp.length-1];
		
		System.out.println("方法三:fileName = " + fileName);

	}

}


结果:

方法一:fileName = lev1_arrow.gif
方法二:fileName = lev1_arrow.gif
temp[] = [G:, Java_Source, navigation_tigra_menu, demo1, img, lev1_arrow.gif]
方法三:fileName = lev1_arrow.gif




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