查询文件路径

约定不等于承诺〃 2024-03-22 13:38 21阅读 0赞

**1** **问题**

如何利用Java来查询文件的路径？

**2** **方法**

1首先在类中利用main函数调用所有文件的和目录的代码。

![92364e2553548b832c4109c1bf06586e.jpeg][]

2 然后开始写查询展示所有文件和目录的方法（运用了递归的思想）

![aef8233138fae0a050be466ba330e6eb.png][]

<table> 
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 <td>import java.io.File; import java.util.Arrays; import java.util.Scanner; public class index1017 &nbsp;{ &nbsp; &nbsp;public static int fileNum = 0; &nbsp; &nbsp;public static int directoryNum = 0; &nbsp; &nbsp;public static void show(File file){ &nbsp; &nbsp; &nbsp; &nbsp;File[] files = file.listFiles(); &nbsp; &nbsp; &nbsp; &nbsp;if (null != files){ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;for (int i = 0; i &lt; files.length; i++){ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;String result = files[i].isFile()?"一个文件":" &nbsp;一个目录"; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;System.out.println(files[i] + "\t" + result); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;} &nbsp; &nbsp; &nbsp; &nbsp;} &nbsp; &nbsp;} &nbsp; &nbsp;public static void main(String[] args) { &nbsp; &nbsp; &nbsp; &nbsp;System.out.println("请输入你要查询的文件路径："); &nbsp; &nbsp; &nbsp; &nbsp;Scanner sc = new Scanner(System.in); &nbsp; &nbsp; &nbsp; &nbsp;String pathName = sc.nextLine(); &nbsp; &nbsp; &nbsp; &nbsp;System.out.println(pathName); &nbsp; &nbsp; &nbsp; &nbsp;File file = new File(pathName); &nbsp; &nbsp; &nbsp; &nbsp;System.out.println("当前路径的文件是否存在："+file.exists()); &nbsp; &nbsp; &nbsp; &nbsp;System.out.println("文件的长度："+file.length()); &nbsp; &nbsp; &nbsp; &nbsp;System.out.println("文件最后一次修改的时间："+file.lastModified()); &nbsp; &nbsp; &nbsp; &nbsp;System.out.println("文件的绝对路径："+file.getAbsolutePath()); &nbsp; &nbsp; &nbsp; &nbsp;System.out.println("==========================="); &nbsp; &nbsp;} }</td> 
 </tr> 
 </tbody> 
</table>

**3** **结语**

针对获取指定目录下的文件查找问题，提出递归遍历的方法，通过本实验，证明该方法是有效的，本文的方法还存在不能显示出文件的名称，未来可以继续研究对于指定目录下的文件查找。

[92364e2553548b832c4109c1bf06586e.jpeg]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/48a16fcd032c4e8287ac5f2ae44f08e1.png
[aef8233138fae0a050be466ba330e6eb.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/22/37d167d5f85540b483f4c612ef729cc5.png