IO流文件的复制删除

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http://mahua.jser.me/
别人的IO流学习小结 http://blog.csdn.net/zzp_403184692/article/details/8057693
IO流文件的复制删除

1.UI界面：

2.类结构

3.代码

package Copytool;类

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;public class FileTool {    // 文件的复制    public static void copyFile(String srcPath, String destPath, String srcKey, String destKey) {        copyFile(new File(srcPath), new File(destPath), srcKey, destKey);    }    public static void copyFile(File srcFile, File destFile, String srcKey, String destKey) {        InputStream in = null;// 定义 声明 初始化        OutputStream out = null;        try {            // 异常一            /** 第一步：流 **/            in = new FileInputStream(srcFile);// 子类转成父类？没问题            out = new FileOutputStream(destFile);            /** 第二步：边写边读，，不能一次性读，内存不够 **/            byte[] buffer = new byte[512];            int length = in.read(buffer);// 有效字节个数            /** 第三步：关键字替换 验证关键字！！ **/            if (srcFile == null || "".equals(srcFile)) {                // 不进行替换                while (length != -1) {                    out.write(buffer, 0, length);                    length = in.read(buffer);                }            } else {                // 进行替换                if (destKey == null) {                    destKey = "";                }                // 进行替换                while (length != -1) {                    String string = new String(buffer, 0, length);//                    string = string.replace(srcKey, destKey);// 关键字替换                    out.write(string.getBytes());// string -> byte[]                    length = in.read(buffer);                }            }            // 异常二            // in.close();        } catch (Exception e) {            e.printStackTrace();        } finally {            /** 第三步： 关闭 **/            try {                if (in != null) {                    // int a = 1/0;                    // 异常三                    in.close();                }            } catch (IOException e) {                e.printStackTrace();            } finally {                in = null;// 交给gc处理            }            try {                if (out != null) {                    out.close();                }            } catch (IOException e) {                e.printStackTrace();            } finally {                out = null;            }        }    }    public static void copyFolder(String srcPath, String destPath, String srcKey, String destKey) {        File srcFile = new File(srcPath);        File destFile = new File(destPath);        copyFolder(srcFile, destFile, srcKey, destKey);    }    public static void copyFolder(File srcFile, File destFile, String srcKey, String destKey) {        /** 第一步： 判断是否存在 **/        if (srcFile != null && srcFile.exists()) {            /** 第二步： 判断是否是文件夹 **/            if (srcFile.isDirectory()) {                // File流只能帮你创建文件，，不能创建一个文件夹                if (!destFile.exists()) {                    destFile.mkdirs();                }                /** 第三步： 拿到文件夹里面的文件或文件夹的那个文件数组！！！，， **/                File[] listFiles = srcFile.listFiles();                /** 第四步：遍历递归 **/                for (File f : listFiles) // 增强for循环,1.5后                {                    // 由于srcFile 路径变长了->destFile 也要变长                    String name = f.getName(); // 变长的部分！！！                    // 把目标文件也不变长                    File file = new File(destFile, name);                    copyFolder(f, file, srcKey, destKey);// 递归自己                }            } else {                // 必定是文件了！！                copyFile(srcFile, destFile, srcKey, destKey);            }        }    }    public static void deleteFolder(String path) {        deleteFolder(new File(path));    }    public static void deleteFolder(File file) {        /** 第一步： 判断是否存在 **/        if (file != null && file.exists()) {            /** 第二步： 判断是否是文件夹 **/            if (file.isDirectory()) {                File[] listFiles = file.listFiles();                if (listFiles.length != 0) {                    // 删除孩子！！                    for (int i = 0; i < listFiles.length; i++) {                        File file2 = listFiles[i];                        deleteFolder(file2);                    }                }                // 自己 空的文件夹                file.delete();            } else {                file.delete();            }        }    }    public static void saveFile(String path, String content) {        //        saveFile(new File(path), content);    }    public static void saveFile(File file, String content) {        //        if (file != null) {            /** 第一步： 判断父类文件夹存不存在 **/            // c:\\aa\\bb\cc            File parentFile = file.getParentFile();// 拿到父类文件夹！！！            if (!parentFile.exists()) {                parentFile.mkdirs();            }            /** 第二步： 流写 out **/            OutputStream out = null;            try {                out = new FileOutputStream(file);                out.write(content.getBytes());// string->byte            } catch (Exception e) {                e.printStackTrace();            } finally {                if (out != null)                    try {                        out.close();                    } catch (IOException e) {                        e.printStackTrace();                    } finally {                        out = null;                    }            }        }    }}

MyFrame类

***package Copytool;import javax.swing.JFrame;public class MyFrame extends JFrame {    public MyFrame() {        // TODO Auto-generated constructor stub        this.setTitle("文件拷贝");        MyPanel jp = new MyPanel();        this.add(jp);        this.setSize(550, 400);        this.setVisible(true);    }    public static void main(String[] args) {        new MyFrame();    }}***

MyPanel类

package Copytool;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.File;import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;public class MyPanel extends JPanel {    public String srcPath = "";    public String destPath = "";    public String destname;    public String savename;    public String srcKey = "", destKey = "";    public String path, content;    public MyPanel() {        // TODO Auto-generated constructor stub        init();    }    /**     * 面板内容     */    private void init() {        this.setLayout(null);        // 复制选项        JLabel jl = new JLabel("复制选项：");        jl.setBounds(45, 20, 80, 20);// 205        this.add(jl);        JLabel jl1 = new JLabel("原来路径");        jl1.setBounds(45, 50, 80, 20);        this.add(jl1);        JTextField tf1 = new JTextField();        tf1.setBounds(100, 50, 250, 20);        this.add(tf1);        JButton jb1 = new JButton("选择复制路径");        jb1.setBounds(360, 50, 60, 20);        this.add(jb1);        JLabel jl2 = new JLabel("目标路径");        jl2.setBounds(45, 80, 80, 20);        this.add(jl2);        JTextField tf2 = new JTextField();        tf2.setBounds(100, 80, 250, 20);        this.add(tf2);        JButton jb2 = new JButton("选择目标路径");        jb2.setBounds(360, 80, 60, 20);        this.add(jb2);        // 关键字转换        JLabel jl0 = new JLabel("关键字转换：");        jl0.setBounds(45, 110, 80, 20);// 200        this.add(jl0);        JTextField tf3 = new JTextField();        tf3.setBounds(50, 140, 120, 20);        this.add(tf3);        JLabel jb3 = new JLabel("转成");        jb3.setBounds(217, 140, 60, 20);        this.add(jb3);        JTextField tf4 = new JTextField();        tf4.setBounds(300, 140, 120, 20);        this.add(tf4);        // String s;        // 删除与保存        JLabel jl01 = new JLabel("删除与保存：");        jl01.setBounds(45, 175, 80, 20);// 200        this.add(jl01);        // 删除        JLabel jl3 = new JLabel("删除路径");        jl3.setBounds(45, 210, 60, 20);        this.add(jl3);        JTextField tf5 = new JTextField();        tf5.setBounds(110, 210, 220, 20);        this.add(tf5);        JButton jb4 = new JButton("选择删除路径");        jb4.setBounds(360, 210, 60, 20);        this.add(jb4);        JLabel jl4 = new JLabel("保存路径");        jl4.setBounds(45, 250, 60, 20);        this.add(jl4);        JTextField tf6 = new JTextField();        tf6.setBounds(110, 250, 220, 20);        this.add(tf6);        JButton jb5 = new JButton("选择保存路径");        jb5.setBounds(360, 250, 60, 20);        this.add(jb5);        JButton jb6 = new JButton("确定");        jb6.setBounds(380, 310, 60, 20);        this.add(jb6);        JLabel jl5 = new JLabel("保存内容");        jl5.setBounds(45, 290, 60, 20);        this.add(jl5);        JTextField tf7 = new JTextField();        tf7.setBounds(110, 290, 220, 20);        this.add(tf7);        ActionListener action_listener = new ActionListener() {            @Override            public void actionPerformed(ActionEvent e) {                // TODO Auto-generated method stub                // System.out.println("str1=" + str1);                String str = e.getActionCommand();                switch (str) {                case "选择复制路径":                    JFileChooser fileChooser1 = new JFileChooser("C:\\Users\\黄家鹏\\Desktop\\新建文件夹");                    fileChooser1.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);                    fileChooser1.showDialog(null, "选择");                    File selectFile1 = fileChooser1.getSelectedFile();                    tf1.setText(selectFile1.getPath());                    srcPath = tf1.getText();                    destname = selectFile1.getName();                    break;                case "选择目标路径":                    JFileChooser fileChooser2 = new JFileChooser("C:\\Users\\黄家鹏\\Desktop\\新建文件夹");                    fileChooser2.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);                    fileChooser2.showDialog(null, "选择");                    File selectFile2 = fileChooser2.getSelectedFile();                    tf2.setText(selectFile2.getPath() + "\\" + destname);                    destPath = tf2.getText();                    System.out.println(destPath);                    break;                case "选择删除路径":                    JFileChooser fileChooser4 = new JFileChooser("C:\\Users\\黄家鹏\\Desktop\\新建文件夹");                    fileChooser4.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);                    fileChooser4.showDialog(null, "选择");                    File selectFile4 = fileChooser4.getSelectedFile();                    tf5.setText(selectFile4.getPath());                    break;                case "选择保存路径":                    JFileChooser fileChooser5 = new JFileChooser("C:\\Users\\黄家鹏\\Desktop\\新建文件夹");                    fileChooser5.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);                    fileChooser5.showDialog(null, "选择");                    File selectFile5 = fileChooser5.getSelectedFile();                    tf6.setText(selectFile5.getPath());                    System.out.println("       " + tf6.getText());                    System.out.println("      " + tf7.getText());                    break;                case "确定":                    System.out.println("destPath=" + destPath);                    srcKey = tf3.getText();                    destKey = tf4.getText();                    FileTool.copyFolder(srcPath, destPath, srcKey, destKey);                    System.out.println("deleteFolder=" + tf5.getText());                    FileTool.deleteFolder(tf5.getText());                    FileTool.saveFile(tf6.getText(), tf7.getText());                    break;                }            }        };        jb1.addActionListener(action_listener);        jb2.addActionListener(action_listener);        jb4.addActionListener(action_listener);        jb5.addActionListener(action_listener);        jb6.addActionListener(action_listener);    }}

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