java生成文件夹和文件的简单示例分享

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class JFile {

 public static boolean createFile(String destFileName) { 
        File file = new File(destFileName); 
        if(file.exists()) { 
         return false; 
        } 
        if (destFileName.endsWith(File.separator)) { 
         return false; 
        } 
        if(!file.getParentFile().exists()) { 
      if(!file.getParentFile().mkdirs()) { 
       return false; 
            } 
        } 
        try { 
            if (file.createNewFile()) { 
             return true; 
            } else { 
             return false; 
            } 
        } catch (IOException e) { 
            e.printStackTrace(); 
            return false; 
        } 
    } 

     public static boolean createDir(String destDirName) { 
        File dir = new File(destDirName); 
        if (dir.exists()) { 
         return false; 
        } 
        if (!destDirName.endsWith(File.separator)) { 
            destDirName = destDirName + File.separator; 
        } 
       if (dir.mkdirs()) { 
           return true; 
        } else { 
            return false; 
        } 
    } 

    public static String createTempFile(String prefix, String suffix, String dirName) { 
        File tempFile = null; 
        if (dirName == null) { 
            try{ 
                tempFile = File.createTempFile(prefix, suffix); 
                return tempFile.getCanonicalPath(); 
            } catch (IOException e) { 
                e.printStackTrace(); 
               return null; 
            } 
        } else { 
            File dir = new File(dirName); 
            if (!dir.exists()) { 
                if (!JFile.createDir(dirName)) { 

                    return null; 
                } 
            } 
            try { 
                tempFile = File.createTempFile(prefix, suffix, dir); 
                return tempFile.getCanonicalPath(); 
            } catch (IOException e) { 
                e.printStackTrace(); 
                return null; 
            } 
        } 
    }

    public static void copyFile(String oldPath, String newPath) {
        try {
            int bytesum = 0;
            int byteread = 0;
            File oldfile = new File(oldPath);
            if (oldfile.exists()) {
             InputStream inStream = new FileInputStream(oldPath);
                FileOutputStream fs = new FileOutputStream(newPath);
                byte[] buffer = new byte[1444];
                int length;
                while ( (byteread = inStream.read(buffer)) != -1) {
                    bytesum += byteread;
                    fs.write(buffer, 0, byteread);
                }
                inStream.close();
            }
        }
        catch (Exception e) {
                e.printStackTrace();

        }
    }
}