读写效率

来源：互联网发布：淘宝上耐克是正品吗编辑：程序博客网时间：2024/05/22 07:44

文件搜索器

代码块

拷贝文件

@requires_authorizationpublic static void copyFile(File srcFile, File destFile){        InputStream in = null;        OutputStream out = null;        try{            in = new FileInputStream(srcFile);            out = new FileOutputStream(destFile);            byte[] b = new byte[1024];            int length = in.read(b); //返回有效字节数                while(length != -1){                    out.write(b, 0, length);                    length = in.read(b);            }} catch(Exception e){            e.printStackTrace();        } finally{            try {                in.close();                out.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }

public class FileTool {    // 拷贝    public static void copyFile(String srcPath, String destPath, String srcWord, String destWord) {        copyFile(new File(srcPath), new File(destPath), srcWord, destWord);    }    // 拷贝文件    // 重载 用于将路径转化为文件    // 添加关键字转化功能    public static void copyFile(File srcFile, File destFile, String srcWord, String destWord) {        InputStream in = null;        OutputStream out = null;        try {            /*             * 1.流             */            in = new FileInputStream(srcFile);            out = new FileOutputStream(destFile);            byte[] b = new byte[1024];            int length = in.read(b); // 返回有效字节数            /*             * 关键字转化 拷贝             */            if (srcFile == null && "".equals(srcFile)) {                // 不进行关键字转化 拷贝                while (length != -1) {                    out.write(b, 0, length);                    length = in.read(b);                }            } else {// 进行关键字转化                    // 目标关键字为空则默认为""                if (destWord == null) {                    destWord = "";                }                while (length != -1) {                    String string = new String(b, 0, length);// 获取0到length-1的字符串                    string = string.replace(srcWord, destWord);// 关键字替换                    out.write(b, 0, length);                    length = in.read(b);                }            }        } catch (Exception e) {            e.printStackTrace();        } finally {            try {                in.close();                out.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }    // 拷贝文件夹    public static void copyFolder(String srcPath, String destPath, String srcWord, String destWord) {        copyFolder(new File(srcPath), new File(destPath), srcWord, destWord);    }    public static void copyFolder(File srcFile, File destFile, String srcWord, String destWord) {        /**         * 1.是否存在         */        if (srcFile != null && srcFile.exists()) {            /**             * 2.是否文件夹             */            if (srcFile.isDirectory()) {                /**                 * 3.目的文件夹是否存在                 */                // file流只能创建文件 不能创建文件夹                if (!destFile.exists()) {                    destFile.mkdirs();                }                /** 4. 拿到文件夹里面的文件或文件夹的那个文件数组！！！ **/                File[] files = srcFile.listFiles();                // 遍历递归                for (File f : files) {                    String string = f.getName();                    File file = new File(destFile, string);                    copyFolder(f, file, srcWord, destWord);                }            } else {// 非文件夹则必定是文件                copyFile(srcFile, destFile, srcWord, destWord);            }        }    }    // 删除文件    public static void deleteFolder(String srcPath) {        deleteFolder(new File(srcPath));    }    public static void deleteFolder(File srcFile) {        /** 1.判断是否存在 **/        if (srcFile.exists()) {            /** 2.判断是否是文件夹 **/            if (srcFile.isDirectory()) {                File[] files = srcFile.listFiles();                for (File f : files) {                    deleteFolder(f);                }            }            srcFile.delete();// 文件 删除自己        } else {            srcFile.delete();        }    }    public static void saveFile(String path, String content) {        saveFile(new File(path), content);    }    public static void saveFile(File file, String content) {        /**         * 1.判断父类文件夹是否存在         */        if (!file.getParentFile().exists()) {            file.mkdirs();        }        /**         * 2.写流 out         */        OutputStream out = null;        try {            out = new FileOutputStream(file);            out.write(content.getBytes());        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                if (out != null)                    out.close();            } catch (IOException e) {                e.printStackTrace();            } finally {                out = null;            }        }    }}

带功能界面

package javaTEST;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JTextField;import javax.swing.filechooser.FileNameExtensionFilter;//增删查改界面public class FunctionUI extends JFrame {    static String Path1;// 原地址    static String Path2;// 目的地址    static String Path3;// 删除文件    static String Path4;// 保存文件    public void showUI() {        // 界面        setSize(515, 450);        setLocationRelativeTo(null);        setDefaultCloseOperation(3);        setLayout(null);        /*         * 文件拷贝         */        // 标签        JLabel fileCopy = new JLabel("文件拷贝");        JLabel src = new JLabel("源路径");        JLabel dest = new JLabel("目标路径");        fileCopy.setBounds(10, 12, 70, 20);        src.setBounds(10, 40, 70, 20);        dest.setBounds(10, 65, 70, 20);        // 源路径        JTextField srcPath = new JTextField();        srcPath.setEditable(true);        srcPath.setBounds(80, 40, 365, 20);        // 目标路径        JTextField destPath = new JTextField();        destPath.setEditable(true);        destPath.setBounds(80, 65, 365, 20);        // 选择按钮        JButton button1 = new JButton("...");        button1.setBounds(450, 40, 30, 20);        JButton button2 = new JButton("...");        button2.setBounds(450, 65, 30, 20);        // aaa转成bbb        JTextField aaa = new JTextField();        JTextField bbb = new JTextField();        aaa.setBounds(10, 100, 200, 20);        bbb.setBounds(280, 100, 200, 20);        JLabel convertTo = new JLabel("转成");        convertTo.setBounds(230, 100, 60, 20);        // 拷贝按钮        JButton copy = new JButton("确认拷贝");        copy.setBounds(195, 135, 100, 20);        // 添加到界面        add(fileCopy);        add(src);        add(dest);        add(srcPath);        add(destPath);        add(button1);        add(button2);        add(aaa);        add(bbb);        add(convertTo);        add(copy);        /*         * 文件删除         */        // 标签 28 文件删除， 路径        JLabel fileDelete = new JLabel("文件删除");        fileDelete.setBounds(10, 172, 70, 20);        JLabel path = new JLabel("路径");        path.setBounds(10, 200, 70, 20);        // 文本框： 路径        JTextField route = new JTextField();        route.setEditable(true);        route.setBounds(80, 200, 365, 20);        // 按钮： 选择，删除        JButton button3 = new JButton("...");        button3.setBounds(450, 200, 30, 20);        JButton delete = new JButton("删除");        delete.setBounds(195, 235, 100, 20);        // 添加到界面        add(fileDelete);        add(path);        add(route);        add(button3);        add(delete);        /*         * 文件保存         */        // 标签： 文件保存， 目标路径        JLabel fileSave = new JLabel("文件保存");        fileSave.setBounds(10, 277, 70, 20);        JLabel destSave = new JLabel("目标路径");        destSave.setBounds(10, 305, 70, 20);        // 文本框： 目标路径， 输入框        JTextField savePath = new JTextField();        savePath.setBounds(80, 305, 365, 20);        savePath.setEditable(true);        JTextField enter = new JTextField();        enter.setBounds(10, 330, 415, 20);        enter.setEditable(true);        // 按钮： 选择， 保存        JButton button4 = new JButton("...");        button4.setBounds(450, 305, 30, 20);        JButton save = new JButton("保存");        save.setBounds(430, 330, 60, 20);        // 添加        add(fileSave);        add(destSave);        add(savePath);        add(enter);        add(button4);        add(save);        setVisible(true);        button1.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                JFileChooser j = new JFileChooser();                j.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);                j.showOpenDialog(null);                // 设置后缀名                FileNameExtensionFilter filter = new FileNameExtensionFilter(".txt", "txt");                j.setFileFilter(filter);                Path1 = j.getSelectedFile().getAbsolutePath();                srcPath.setText(Path1);            }        });        button2.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                JFileChooser j = new JFileChooser();                j.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);                j.showOpenDialog(null);                Path2 = j.getSelectedFile().getAbsolutePath();                destPath.setText(Path2);            }        });        button3.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                JFileChooser j = new JFileChooser();                j.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);                j.showOpenDialog(null);                Path3 = j.getSelectedFile().getAbsolutePath();                route.setText(Path3);            }        });        button4.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                JFileChooser j = new JFileChooser();                j.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);                j.showOpenDialog(null);                Path4 = j.getSelectedFile().getAbsolutePath();                savePath.setText(Path4);            }        });        // 确认拷贝        copy.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                String srcWord = aaa.getText();                String destWord = bbb.getText();                // FileTool ft = new FileTool();                FileTool.copyFile(Path1, Path2, srcWord, destWord);            }        });        // 删除        delete.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                FileTool ft = new FileTool();                Path3 = route.getText();                ft.deleteFolder(Path3);            }        });        // 保存        save.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                FileTool ft = new FileTool();                Path4 = savePath.getText();                String content = enter.getText();                ft.saveFile(Path4, content);            }        });    }    public static void main(String args[]) {        FunctionUI fc = new FunctionUI();        fc.showUI();    }}

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