filecut.java

一个JAVA实现的文件切割工具

			
		else if (e.getSource()==srcSetSub){//设置块数
			if (src.getSelectedRows().length>0){
				String inputValue=JOptionPane.showInputDialog(this,"请输入切割的块数(范围:2~9999):","部分设置块数",JOptionPane.QUESTION_MESSAGE );
				if (inputValue!=null && Integer.parseInt(inputValue)>=2 && Integer.parseInt(inputValue)<=9999){
					String subLength=new String();
					int srcSelectIndex[]=src.getSelectedRows();//获得选定行的索引
					for (int i=0;i<srcSelectIndex.length;i++){
						myModel.setValueAt(Integer.parseInt(inputValue),srcSelectIndex[i],2);
						subLen.setElementAt((Long)fileLen.elementAt(srcSelectIndex[i])/Integer.parseInt(inputValue), srcSelectIndex[i]);
						subLength=((Long)subLen.elementAt(srcSelectIndex[i])<1024*1024)?(Math.round((Long)subLen.elementAt(srcSelectIndex[i])/1024.0*100.0)/100.0+"KB"):(Math.round((Long)subLen.elementAt(srcSelectIndex[i])/1024.0/1024.0*100.0)/100.0+"MB");
						myModel.setValueAt(subLength,srcSelectIndex[i],3);
					}
				}
			}else{
				JOptionPane.showMessageDialog(this, "选项为空!!!");
			}
		}
		else if (e.getSource()==srcAllSetSub){//统一设置块数
			if (src.getRowCount()>0){
				String inputValue=JOptionPane.showInputDialog(this,"请输入切割的块数(范围:2~9999):","统一设置块数",JOptionPane.QUESTION_MESSAGE );
				if (inputValue!=null && Integer.parseInt(inputValue)>=2 && Integer.parseInt(inputValue)<=9999){
					String subLength=new String();
					for (int i=0;i<myModel.getRowCount();i++){
						myModel.setValueAt(Integer.parseInt(inputValue),i,2);
						subLen.setElementAt((Long)fileLen.elementAt(i)/Integer.parseInt(inputValue), i);
						subLength=((Long)subLen.elementAt(i)<1024*1024)?(Math.round((Long)subLen.elementAt(i)/1024.0*100.0)/100.0+"KB"):(Math.round((Long)subLen.elementAt(i)/1024.0/1024.0*100.0)/100.0+"MB");
						myModel.setValueAt(subLength,i,3);
					}
				}
			}else{
				JOptionPane.showMessageDialog(this, "选项为空!!!");
			}
		}
		else if (e.getSource()==destChoice){//目标文件夹
			JFileChooser chooser=new JFileChooser();
			chooser.setDialogTitle("切割后存放的文件夹:");
			chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
			int result=chooser.showOpenDialog(this);
			if(result==JFileChooser.APPROVE_OPTION){
				File file=chooser.getSelectedFile();
				destDirectory=file.getAbsolutePath(); 	
				dest.setText(destDirectory);
			}
		}
		else if(e.getSource()==startCut)//开始切割
			if(src.getRowCount()<=0 || destDirectory==null)
				message.setText("错误:必须有源文件和存放文件夹");			
			else
				(new Thread(this)).start();
		else if(e.getSource()==quit)//退出
			System.exit(0);

	}
	private void delList(){//删除选项
		int srcSelectIndex[]=src.getSelectedRows();//获得选定行的索引	1 3 6	i=3-1=2=>6	
		for (int i=srcSelectIndex.length-1;i>=0;i--){
			myModel.removeRow(srcSelectIndex[i]);
			fileLen.remove(srcSelectIndex[i]);
			subLen.remove(srcSelectIndex[i]);
		}
	}
	private void delAllList(){//删除全部选项
		for (int i=src.getRowCount()-1;i>=0;i--){				
			myModel.removeRow(i);				
		}
		fileLen.clear();
		subLen.clear();	
	}
	
	public void run(){//线程
		src.setEnabled(false);//切割过程中不可编辑表格
		srcChoice.setEnabled(false);//添加
		srcDel.setEnabled(false);//删除
		srcAllDel.setEnabled(false);//全删
		srcSetSub.setEnabled(false);//设块
		srcAllSetSub.setEnabled(false);//统一设块		
		
		destChoice.setEnabled(false);//浏览
		options[0].setEnabled(false);//选项模式1
		options[1].setEnabled(false);//选项模式2
		
		startCut.setEnabled(false);//开始按钮	
		FileSet.setSpeedEditable(false);//切割过程中不允许调速
		page.setEnabledAt(1, false);//切割中不允许合并
		message.setText("正准备切割，请稍等……");
		barPanel.setVisible(true);
		try{
			String []fileList=new String[src.getRowCount()];//最终还剩下的文件列表
			int []subCutter=new int[src.getRowCount()];//对应的文件块数
			for(int i=0;i<src.getRowCount();i++){
				fileList[i]=new String(src.getValueAt(i, 0).toString());
				subCutter[i]=Integer.parseInt(src.getValueAt(i, 2).toString());
			}
			getFileList(fileList,subCutter,dest.getText());	//获得文件列表
		
		}catch (IOException e){
			
		}
		src.setEnabled(true);//切割后可编辑表格
		srcChoice.setEnabled(true);//添加
		srcDel.setEnabled(true);//删除
		srcAllDel.setEnabled(true);//全删
		srcSetSub.setEnabled(true);//设块
		srcAllSetSub.setEnabled(true);//统一设块		
		
		destChoice.setEnabled(true);//浏览
		options[0].setEnabled(true);//选项模式1
		options[1].setEnabled(true);//选项模式2
		
		startCut.setEnabled(true);//开始按钮	
		FileSet.setSpeedEditable(true);//切割后允许调速
		page.setEnabledAt(1, true);//切割后允许合并
		barPanel.setVisible(false);
		subBar.setValue(0);allBar.setValue(0);
	}
	public void getFileList(String []src,int []sub,String dest)throws IOException{//获得切割文件列表
		StringBuffer xcDest=new StringBuffer(dest);//临时变量，用于控制目标存储目录		
		for(int i=0;i<src.length;i++){			
			if (options[0].isSelected()){//为每个源文件分配单独的存储目录
				xcDest.append(src[i].substring(src[i].lastIndexOf(File.separator), src[i].lastIndexOf('.'))+"~");
			   	while (new File(xcDest.toString()).exists()){//如果有重名目录
					xcDest.append("_"+(i+1));//后面跟它的序号
				}
				new File(xcDest.toString()).mkdir();				
			}
			message.setText("当前正在切割第"+(i+1)+"/"+src.length+"个文件，文件切割速度:"+FileSet.COPYLEN+"字节/刀");
			
			filecut(src[i],i,sub[i],Long.parseLong(fileLen.get(i).toString()),
					Long.parseLong(subLen.get(i).toString()),
					xcDest.toString()+src[i].substring(src[i].lastIndexOf(File.separator)));
			//allBar.setValue((int)(100.00/src.length*(i+1)));
			if (options[0].isSelected())
				xcDest.delete(xcDest.lastIndexOf(File.separator),xcDest.length());
		}
		message.setText("所有文件切割完毕！");
	    Toolkit.getDefaultToolkit().beep();//切完叫一声提示用户
	}
	/**fileCut(源文件[String]，列表号(从0开始的)[int]，块数[int]，文件长度[long]，每块长度[long]，目标文件夹[String])
	 * 
	 */
	public void filecut(String srcFile,int n,int sub,long fileLen,long subLen,String dest){//文件切割		
		subBarLabel.setText("正在切割"+srcFile);		
		try{//1.声明段----------------------------------
			DataInputStream readStream=new DataInputStream(new FileInputStream(srcFile));
			byte []data=new byte[FileSet.COPYLEN];//用来中转的字节数组,切割的单位进度(B):FileSet.COPYLEN
			int addValue=0;//进度条的增长数
			long cutByteLen;
			for(int i=1;i<=sub;i++){			
				String fileSub=(i<1000)?(
								(i<100)?((i<10)?(".000"+i):(".00"+i))
										:(".0"+i))
								:("."+i);
				DataOutputStream writeStream=new DataOutputStream(new FileOutputStream(dest+fileSub));
				cutByteLen=FileSet.COPYLEN;
				//2处理段------------------------------------
				while(subLen-cutByteLen>=0){//块文件长度大于基切					
					readStream.read(data);
					writeStream.write(data);
					subBar.setValue((int)(((1-(subLen-cutByteLen)/(double)subLen)*100)/(double)sub)+addValue);
					allBar.setValue((int)(100.00/src.getRowCount()*n)+subBar.getValue()/src.getRowCount());
					cutByteLen+=FileSet.COPYLEN;
				}
				//3.1扫尾段-(1)if每小块段-----(2)if总段---------
				if (subLen-cutByteLen<0){//每小块的余基
					int finallyByte=(int)(subLen-(cutByteLen-FileSet.COPYLEN));				
					readStream.read(data,0,finallyByte);			
					writeStream.write(data,0,finallyByte);
					addValue=(int)(100.0/sub*i);
					subBar.setValue(addValue);
					allBar.setValue((int)(100.00/src.getRowCount()*n)+subBar.getValue()/src.getRowCount());
				}
				if (i==sub && fileLen%sub>0){//总文件的余基，放在最后一个块里面
					if(fileLen%sub<FileSet.COPYLEN){
						readStream.read(data,0,(int)(fileLen%sub));
						writeStream.write(data,0,(int)(fileLen%sub));
					}else{
						cutByteLen=FileSet.COPYLEN;
						while(fileLen%sub-cutByteLen>=0){
							readStream.read(data);
							writeStream.write(data);
							cutByteLen+=FileSet.COPYLEN;
						}
						if(cutByteLen-FileSet.COPYLEN<fileLen%sub){//每小块的余基
							int finallyByte=(int)(fileLen%sub-(cutByteLen-FileSet.COPYLEN));				
							readStream.read(data,0,finallyByte);			
							writeStream.write(data,0,finallyByte);
						}	
					}
					subBar.setValue(100);
					allBar.setValue((int)(100.00/src.getRowCount()*n)+subBar.getValue()/src.getRowCount());
				}
				//4善后段-------------------------------------
				writeStream.close();
			}	
			readStream.close();
		}catch(IOException e){
			JOptionPane.showMessageDialog(this,"意外错误:\n"+e.getMessage());
			message.setText(src+"切割失败！");
		}
		
	}
	
}