dbcopy.java

一个可以存储和打印成绩单的系统

package org.wuhang.transfer;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Calendar;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileNameExtensionFilter;

public class DBCopy {
	private File from_file;
	private File to_file;
    private JFileChooser chooser;
    private final String from_DBPath = "Cjsjk-copy.jar";
    private String to_DBPath = null;
    public DBCopy(){
    }
	public boolean Choose_to_file(){
		chooser = new JFileChooser();
		chooser.setDialogTitle("选择数据库要保存的位置");
		FileNameExtensionFilter filter = new FileNameExtensionFilter("Cjsjk DataBase","adb");
		chooser.setFileFilter(filter);
		Calendar date = Calendar.getInstance();
		SimpleDateFormat o = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");
        chooser.setSelectedFile(new File("Cjsjk-db-"+o.format(date.getTime())+".adb"));
   
		int returnVal = chooser.showSaveDialog(null);
		if(returnVal == JFileChooser.APPROVE_OPTION) {
			to_DBPath = chooser.getSelectedFile().getAbsolutePath();
			to_DBPath = to_DBPath.replace('\\', '/');
			return true;
		}
		else
			return false;
	
    }
	public boolean Choose_file(){
		chooser = new JFileChooser();
		chooser.setDialogTitle("选择数据库要保存的位置");
		FileNameExtensionFilter filter = new FileNameExtensionFilter("Cjsjk DataBase","adb");
		chooser.setFileFilter(filter);
		Calendar date = Calendar.getInstance();
		SimpleDateFormat o = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");
        chooser.setSelectedFile(new File("Cjsjk-dbbackup-"+o.format(date.getTime())));
   
		int returnVal = chooser.showSaveDialog(null);
		if(returnVal == JFileChooser.APPROVE_OPTION) {
			to_DBPath = chooser.getSelectedFile().getAbsolutePath();
			to_DBPath = to_DBPath.replace('\\', '/');
			return true;
		}
		else
			return false;
	
    }
	
    public File getFrom_file() {
		return from_file;
	}


	public void setFrom_file(File from_file) {
		this.from_file = from_file;
	}


	public File getTo_file() {
		return to_file;
	}


	public void setTo_file(File to_file) {
		this.to_file = to_file;
	}


	public String CopyDB() {
		try {
			File temp_file = new File(from_DBPath);
			setFrom_file(temp_file);
			FileInputStream fis = new FileInputStream(getFrom_file());
			if (Choose_to_file()) {
				temp_file = new File(to_DBPath);
				if (temp_file.exists()) {
					JOptionPane.showMessageDialog(null, temp_file.getName()
							+ "数据库已" + "存在!", "提示", JOptionPane.ERROR_MESSAGE);
					return null;
				} else {
					setTo_file(temp_file);
					FileOutputStream fos = new FileOutputStream(getTo_file());
					byte[] b = new byte[1024];
					int temp = 0;
					while (true) {
						temp = fis.read(b);
						if (temp == -1)
							break;
						fos.write(b, 0, temp);
					}
					return to_DBPath;
				}
			}
			else
				return null;
		} catch (Exception ee) {
			ee.printStackTrace();
			return null;
		}
	}
	
	public boolean copyDirectory(String srcDirName){
		if(Choose_file())
		    return copyDirectory(srcDirName,to_DBPath);
		else
			return false;
	}
	
	public boolean copyDirectory(String srcDirName,String destDirName){
		return copyDirectory(srcDirName,destDirName,false);
	}
	
	
	public boolean copyDirectory(String srcDirName,String destDirName,boolean overlay){
		
		File srcDir = new File(srcDirName);
		if(!srcDir.exists()){
			System.out.println("复制目录失败:源目录"+srcDirName+"不存在!");
			return false;
		}else if(!srcDir.isDirectory()){
			System.out.println("复制目录失败:"+srcDirName+"不是一个目录!");
			return false;
		}
		if(!destDirName.endsWith(File.separator)){
			destDirName = destDirName + File.separator;
		}
		File destDir = new File(destDirName);
		if(destDir.exists()){
			if(overlay){
				System.out.println("目标目录已存在,准备删除它!");
				
			}
			JOptionPane.showMessageDialog(null, "目标文件夹已存在!请重新取一个文件夹名",
					"提示", JOptionPane.ERROR_MESSAGE);
			return false;
		}else{
			System.out.println("目标目录不存在,准备创建它!");
			if(!destDir.mkdir()){
				System.out.println("复制失败,创建目标目录失败!");
				return false;
			}
		}
		boolean flag = true;
		File[] files = srcDir.listFiles();
		for(int i=0;i<files.length;i++){
			if(files[i].isFile()){
				flag = copyFile(files[i].getAbsolutePath(),destDirName + files[i].getName());
				if(!flag)
					break;
			}
			if(files[i].isDirectory()){
				flag = copyDirectory(files[i].getAbsolutePath(),
						destDirName + files[i].getName());
				if(!flag)
					break;
			}
		}
		
		if(!flag){
			System.out.println("复制目录失败!"+srcDirName+"至"+destDirName+"失败");
			JOptionPane.showMessageDialog(null, "备份数据失败!", "提示", JOptionPane.ERROR_MESSAGE);
			return false;
		}
		System.out.println("复制目录"+srcDirName + "至"+destDirName+"成功!");
		
		return true;
	}
	public boolean copyFile(String srcFileName,String destFileName){
		return copyFile(srcFileName,destFileName,false);
	}
	public boolean copyFile(String srcFileName,String destFileName,boolean overlay){
	    File srcFile = new File(srcFileName);
		if(!srcFile.exists()){
			System.out.println("源文件存在!");
			return false;
		}else if(!srcFile.isFile()){
			System.out.println("不是个文件!");
			return false;
		}
		File destFile = new File(destFileName);
		if(destFile.exists()){
			if(overlay){
				
			}else{
				System.out.println("目标文件已存在!");
				return false;
			}
		}else{
			if(!destFile.getParentFile().exists()){
				if(!destFile.getParentFile().mkdirs()){
					System.out.println("创建目标文件所在的目录失败!");
					return false;
				}
			}
		}
		int byteread = 0;
		InputStream in = null;
		OutputStream out = null;
		try {
			in = new FileInputStream(srcFile);
			out = new FileOutputStream(destFile);
			byte[] buffer = new byte[1024];
			while((byteread = in.read(buffer))!=-1){
				out.write(buffer,0,byteread);
				
			}
			return true;
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return false;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return false;
		}finally{
			if(out != null){
				try {
					out.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
					return false;
				}
			}
			if(in != null)
				try {
					in.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
					return false;
				}
		}
	}
}