项目差异class文件提取-->上线用

package fileReader;

import java.io.BufferedReader;
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.InputStreamReader;
import java.io.OutputStream;

import javax.swing.JOptionPane;

public class DemoFilre {
    private static String MESSAGE = "";

    public static void main(String[] args) {
        String filePath = System.getProperty("user.home") + "\Desktop\aaa.txt";
        readTxtFile(filePath);

    }

    public static void readTxtFile(String filePath) {
        try {
            String encoding = "GBK";
            File file = new File(filePath);
            if (file.isFile() && file.exists()) { // 判断文件是否存在
                InputStreamReader read = new InputStreamReader(
                        new FileInputStream(file), encoding);// 考虑到编码格式
                BufferedReader bufferedReader = new BufferedReader(read);
                String lineTxt = null;
                while ((lineTxt = bufferedReader.readLine()) != null) {
                    if(lineTxt.startsWith("==")) continue;
                    if(lineTxt.isEmpty()) continue;
                    System.out.println("D:\workspace\spdbSjptServer\WebRoot\" + lineTxt.toString());
                    // 读文件,copy
                    copyFile("D:\workspace\spdbSjptServer\WebRoot\" + lineTxt.toString(), System.getProperty("user.home") + "\Desktop\待上线\" + lineTxt.toString(), true);
                }
                read.close();
            } else {
                System.out.println("找不到指定的文件");
            }
        } catch (Exception e) {
            System.out.println("读取文件内容出错");
            e.printStackTrace();
        }

    }

    public static boolean copyFile(String srcFileName, String destFileName,
            boolean overlay) {
        File srcFile = new File(srcFileName);

        // 判断源文件是否存在
        if (!srcFile.exists()) {
            MESSAGE = "源文件：" + srcFileName + "不存在！";
            JOptionPane.showMessageDialog(null, MESSAGE);
            return false;
        } else if (!srcFile.isFile()) {
            MESSAGE = "复制文件失败，源文件：" + srcFileName + "不是一个文件！";
            JOptionPane.showMessageDialog(null, MESSAGE);
            return false;
        }

        // 判断目标文件是否存在
        File destFile = new File(destFileName);
        if (destFile.exists()) {
            // 如果目标文件存在并允许覆盖
            if (overlay) {
                // 删除已经存在的目标文件，无论目标文件是目录还是单个文件
                new File(destFileName).delete();
            }
        } else {
            // 如果目标文件所在目录不存在，则创建目录
            if (!destFile.getParentFile().exists()) {
                // 目标文件所在目录不存在
                if (!destFile.getParentFile().mkdirs()) {
                    // 复制文件失败：创建目标文件所在目录失败
                    return false;
                }
            }
        }

        // 复制文件
        int byteread = 0; // 读取的字节数
        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) {
            return false;
        } catch (IOException e) {
            return false;
        } finally {
            try {
                if (out != null)
                    out.close();
                if (in != null)
                    in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}