java 里的文件生成与删除

   这里先是文件的生成:

import java.io.*;

public class Demo
{
public static void main( String[] args)
{
File dirFile;
File tempFile;
boolean bFile;
 String sFileName;

bFile = false;

try
{
dirFile = new File("E:\\test");
bFile = dirFile.exists();

if( bFile == true )
{
System.out.println("The folder exists.");
}
else
{
System.out.println("The folder do not exist,now trying to create a one...");
bFile = dirFile.mkdir();
if( bFile == true )
{
System.out.println("Create successfully!");
}
else
{
System.out.println("Disable to make the folder,please check the disk is full or not.");
System.exit(1);
}
}

System.out.println("Now we put files in to the folder...");

for(int i=0; i<5; i++)
{
sFileName = new String("E:\\test\\");
sFileName += String.valueOf(i);
tempFile = new File(sFileName);
bFile = tempFile.createNewFile();
}
}catch(IOException e)
{
// Exception hadler
}

if( bFile == true )
System.out.println("Successfully put files in to the folder!");
else
System.out.println("Sorry sir,i don't finish the job!");
}
}

   然后是文件的删除:

    java删除文件夹时该文件夹必须是空的，写了以下2个方法，运用递归方法来删除欲删除

的文件夹下的所有子文件夹以及文件。
   
    在程序中需要删除的地方调用下面任一方法即可实现。

   

public void removeFile(String path) {
             this.removeFile(new File(path));
    }

    public void removeFile(File path){
        System.out.println("removing file " + path.getPath());
        if (path.isDirectory()){
            File[] child = path.listFiles();
            if (child != null && child.length != 0){
                for (int i = 0; i < child.length; i++){
                    removeFile(child[i]);
                    child[i].delete();
                }
            }
        }
        path.delete();
    }

评论

3 楼 scnujie 2008-07-30  

受教了,各位!

2 楼 Wallian_hua 2008-07-17  

if( bFile )
直接改成这样可能会增加多一点你的代码可读性。。。

1 楼 sunrise353 2008-07-11  

温习了一遍。