读取文件的目录结构和统计文件的代码信息
读取目录结构 FileInfo.java：
package com.data.io; import java.io.*; /** * FileInfo.java * 文件信息 * @author Administrator * */ public class FileInfo { /** * 文件(目录)的大小 (字节) */ private long size; private int fileSize; private int folderSize; private File file; public FileInfo(File file) { this.file = file; } public long getSize() { return size; } public void setSize(long size) { this.size = size; } public int getFileSize() { return fileSize; } public void setFileSize(int fileSize) { this.fileSize = fileSize; } public int getFolderSize() { return folderSize; } public void setFolderSize(int folderSize) { this.folderSize = folderSize; } public void print() { System.out.printf("文件：%s\n", file.getAbsolutePath()); System.out.printf("大小: %,d\n", size); System.out.printf("目录: %,d\n", folderSize); System.out.printf("文件: %,d\n", fileSize); } }
读取代码信息：CodeInfo.java：
package com.data.io; public class CodeInfo { /** * 总行 */ int total; /** * 代码行 */ int codeLine; /** * 空行 */ int blankLine; /** * 注释行 */ int commentLine; public void print() { System.out.printf("总行：%,d\n",total); System.out.printf("代码行: %,d\n",codeLine); System.out.printf("空行: %,d\n",blankLine); System.out.printf("单注释行: %,d\n",commentLine); } }
具体实现功能的文件 Model.java:
package com.data.io; import java.io.*; import java.awt.*; import javax.naming.directory.DirContext; import javax.sound.midi.MidiDevice.Info; import javax.swing.*; import javafx.scene.shape.Line; /** * Model.java * @author Administrator * */ public class Model { /** * 统计一个文件中的代码信息 * * @param sourceFile * @return */ public static CodeInfo getCodeInfo(File sourceFile) { CodeInfo info = new CodeInfo(); // 每次读取文件中的一行，这一行什么开始，(/* //)，什么时候结束(*/) try (BufferedReader in = new BufferedReader(new FileReader(sourceFile))) { String line; boolean flag = false; while (null != (line = in.readLine())) { info.total++; // 截断前后的空格 line = line.trim(); if (line.startsWith("/*")) { flag = true; } if (flag) { // 放在前面防止单行的这个注释法 info.commentLine++; if (line.endsWith("*/")) { flag = false; } } else { if (line.length() == 0) { // 空行 info.blankLine++; } if (line.startsWith("//")) { info.commentLine++; } } } info.codeLine = info.total - info.blankLine - info.commentLine; } catch (Exception e) { // TODO: handle exception } return info; } /** * * @param file * 目标文件 * @return FileInfo 文件的统计信息 */ public static FileInfo getFileInfo(File file) { FileInfo info = new FileInfo(file); info.setSize(countSize(file)); info.setFileSize(countFileSize(file)); info.setFolderSize(countFolderSize(file)); return info; } private static int countFolderSize(File dir) { int size = 0; // 获得目录中的所有内容 File[] files = dir.listFiles(); //遍历 for(File f : files) { if(f.isDirectory()) { //文件夹则加一 size++; //进入该目录,统计目录中文件夹的数量 //注意不能只写countFileSize(f)，这样每层都有一个新的size size += countFolderSize(f); } } return size; } private static int countFileSize(File dir) { int size = 0; // 获得目录中的所有内容 File[] files = dir.listFiles(); for(File f : files) { if(f.isFile()) { //文件则加一 size++; }else { //目录:进入该目录,统计目录中文件的数量 size += countFileSize(f); } } return size; } private static long countSize(File dir) { long size = 0; // 获得目录中的所有内容 File[] files = dir.listFiles(); for(File f : files) { if(f.isFile()) { //文件 long s = f.length(); size += s; }else { //目录 size += countSize(f); } } return size; } }
运行文件App.java:
package com.data.io; import java.io.File; /** * App.java * @author Administrator * */ public class App { public static void main(String[] args) { // File file = new File("G:/jdk1.8.0_131"); // FileInfo info = Model.getFileInfo(file); // info.print(); CodeInfo info = Model.getCodeInfo(new File("code.txt")); info.print(); } }
运行结果：
总行：17
代码行: 7
空行: 2
单注释行: 8
文件：G:\jdk1.8.0_131
大小: 458,125,906
目录: 619
文件: 9,196
如果用Swing做个界面的话：
用windowsbuilder做：
UI.java（运行接口）
package com.data.io; import java.awt.BorderLayout; import java.awt.EventQueue; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; import java.awt.GridBagLayout; import javax.swing.JLabel; import java.awt.GridBagConstraints; import javax.swing.JButton; import javax.swing.JFileChooser; import java.awt.Insets; import javax.swing.JTextField; import java.awt.event.ActionListener; import java.io.File; import java.awt.event.ActionEvent; public class UI extends JFrame { private JPanel contentPane; private JTextField textField; private JLabel lblNewLabel_1; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { UI frame = new UI(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public UI() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 712, 554); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); GridBagLayout gbl_contentPane = new GridBagLayout(); gbl_contentPane.columnWidths = new int[]{0, 0, 0, 0}; gbl_contentPane.rowHeights = new int[]{0, 0, 0, 0, 0, 0}; gbl_contentPane.columnWeights = new double[]{1.0, 1.0, 0.0, Double.MIN_VALUE}; gbl_contentPane.rowWeights = new double[]{0.0, 0.0, 0.0, 0.0, 1.0, Double.MIN_VALUE}; contentPane.setLayout(gbl_contentPane); JLabel lblNewLabel = new JLabel("New label"); GridBagConstraints gbc_lblNewLabel = new GridBagConstraints(); gbc_lblNewLabel.anchor = GridBagConstraints.EAST; gbc_lblNewLabel.insets = new Insets(0, 0, 5, 5); gbc_lblNewLabel.gridx = 0; gbc_lblNewLabel.gridy = 0; contentPane.add(lblNewLabel, gbc_lblNewLabel); textField = new JTextField(); GridBagConstraints gbc_textField = new GridBagConstraints(); gbc_textField.insets = new Insets(0, 0, 5, 5); gbc_textField.fill = GridBagConstraints.HORIZONTAL; gbc_textField.gridx = 1; gbc_textField.gridy = 0; contentPane.add(textField, gbc_textField); textField.setColumns(10); JButton btnNewButton = new JButton("选择目录"); btnNewButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser chooser = new JFileChooser(); // chooser.setFileFilter(filter); chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY); int r = chooser.showOpenDialog(UI.this); if(r == JFileChooser.APPROVE_OPTION) { File dir = chooser.getSelectedFile(); FileInfo info = Model.getFileInfo(dir); //显示结果 textField.setText(dir.getAbsolutePath()); lblNewLabel.setText(String.format("大小：%,d", info.getSize())); } } }); GridBagConstraints gbc_btnNewButton = new GridBagConstraints(); gbc_btnNewButton.insets = new Insets(0, 0, 5, 0); gbc_btnNewButton.gridx = 2; gbc_btnNewButton.gridy = 0; contentPane.add(btnNewButton, gbc_btnNewButton); lblNewLabel_1 = new JLabel("New label"); GridBagConstraints gbc_lblNewLabel_1 = new GridBagConstraints(); gbc_lblNewLabel_1.insets = new Insets(0, 0, 5, 5); gbc_lblNewLabel_1.gridx = 0; gbc_lblNewLabel_1.gridy = 1; contentPane.add(lblNewLabel_1, gbc_lblNewLabel_1); JLabel lblNewLabel_2 = new JLabel("New label"); GridBagConstraints gbc_lblNewLabel_2 = new GridBagConstraints(); gbc_lblNewLabel_2.insets = new Insets(0, 0, 5, 5); gbc_lblNewLabel_2.gridx = 0; gbc_lblNewLabel_2.gridy = 2; contentPane.add(lblNewLabel_2, gbc_lblNewLabel_2); JLabel lblNewLabel_3 = new JLabel("New label"); GridBagConstraints gbc_lblNewLabel_3 = new GridBagConstraints(); gbc_lblNewLabel_3.insets = new Insets(0, 0, 5, 5); gbc_lblNewLabel_3.gridx = 0; gbc_lblNewLabel_3.gridy = 3; contentPane.add(lblNewLabel_3, gbc_lblNewLabel_3); // JPanel panel = new JPanel(); PieView pie = new PieView(); // panel.add(pie); GridBagConstraints gbc_panel = new GridBagConstraints(); gbc_panel.gridwidth = 3; gbc_panel.fill = GridBagConstraints.BOTH; gbc_panel.gridx = 0; gbc_panel.gridy = 4; contentPane.add(pie, gbc_panel); } }
PieView.java:
package com.data.io; import java.awt.Graphics; import javax.swing.JPanel; import com.sun.prism.paint.Color; public class PieView extends JPanel{ // double[] data; // // Color[] colors = {Color.BLUE,} @Override public void paint(Graphics g) { super.paint(g); //获得panel的宽，高 int w = getWidth(); int h = getHeight(); int x = w/2; int y = h/2; int r = w<h? w : h ; // g.fillOval(0, 0, w, h); g.fillOval(x- r/2, y- r/2, r, r); // g.fillRect(w- r/2, h- r/2, r, r); } }
结果：
