修改文件属性

修改文件属性 File类的常用方法 方法名 功能 getName() 获取文件名称，不包括路径信息 length() 获取文件长度，以字节为单位 getPaht() 获取文件的路径信息，包括文件名 toURI() 文件的URI路径，以file为前缀 lastModified() 获取文件最后修改日期，以long值示 canRead() 文件是否可读 canWrite() 文件是否可写 isHidden() 文件是否隐藏 package com.file.file01; import java.awt.BorderLayout; import java.awt.FlowLayout; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import java.sql.Date; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.SwingUtilities; public class ModifyFileAttribute extends JFrame { private static final long serialVersionUID = 1L; //面板容器 private JPanel jContentPane = null; //北面面板 private JPanel jPanel = null; //中间面板 private JPanel jPanel1 = null; //选择文件按钮 private JButton jButton = null; //文件标签 private JLabel fileLabel = null; //文件大小标签 private JLabel jLabel = null; //文件路径标签 private JLabel jLabel1 = null; //uri标签 private JLabel jLabel2 = null; //最后修改日期标签 private JLabel jLabel3 = null; //文件大小文本框 private JTextField sizeField = null; //文件路径文本框 private JTextField pathField = null; //uri文本框 private JTextField uriField = null; //最后修改日期 private JTextField modifyDateField = null; //可读 private JCheckBox readCheckBox = null; //可写 private JCheckBox writeCheckBox = null; //隐藏 private JCheckBox hideCheckBox = null; //构造方法 public ModifyFileAttribute() { // super(); initialize(); } //南面的面板 private JPanel getJPanel() { // //面板不为家的情况下创建 if (jPanel == null) { //流式布局 FlowLayout flowLayout = new FlowLayout(); //间距 flowLayout.setVgap(0); //创建面板 jPanel = new JPanel(); //设置面板的布局 jPanel.setLayout(flowLayout); //添加复选框 //可读 jPanel.add(getReadCheckBox(), null); //可写 jPanel.add(getWriteCheckBox(), null); //隐藏 jPanel.add(getHideCheckBox(), null); } return jPanel; } //中间面板 private JPanel getJPanel1() { if (jPanel1 == null) { //GridBagConstraints 类指定使用 GridBagLayout 类布置的组件的约束。 //GridBagLayout 类是一个灵活的布局管理器，它不要求组件的大小相同即可将组件垂直和水平对齐 GridBagConstraints gridBagConstraints8 = new GridBagConstraints(); //当组件的显示区域大于它所请求的显示区域的大小时使用此字段 //HORIZONTAL在水平方向而不是垂直方向上调整组件大小 gridBagConstraints8.fill = GridBagConstraints.HORIZONTAL; gridBagConstraints8.gridy = 4; gridBagConstraints8.weightx = 1.0; gridBagConstraints8.insets = new Insets(0, 5, 5, 0); gridBagConstraints8.gridx = 1; GridBagConstraints gridBagConstraints7 = new GridBagConstraints(); gridBagConstraints7.fill = GridBagConstraints.HORIZONTAL; gridBagConstraints7.gridy = 3; gridBagConstraints7.weightx = 1.0; gridBagConstraints7.insets = new Insets(0, 5, 5, 0); gridBagConstraints7.gridx = 1; GridBagConstraints gridBagConstraints6 = new GridBagConstraints(); gridBagConstraints6.fill = GridBagConstraints.HORIZONTAL; gridBagConstraints6.gridy = 2; gridBagConstraints6.weightx = 1.0; gridBagConstraints6.insets = new Insets(0, 5, 5, 0); gridBagConstraints6.gridx = 1; GridBagConstraints gridBagConstraints5 = new GridBagConstraints(); gridBagConstraints5.fill = GridBagConstraints.HORIZONTAL; gridBagConstraints5.gridy = 1; gridBagConstraints5.weightx = 1.0; gridBagConstraints5.insets = new Insets(0, 5, 5, 0); gridBagConstraints5.gridx = 1; GridBagConstraints gridBagConstraints4 = new GridBagConstraints(); gridBagConstraints4.gridx = 0; gridBagConstraints4.gridy = 3; jLabel3 = new JLabel(); jLabel3.setText("URI路径"); GridBagConstraints gridBagConstraints3 = new GridBagConstraints(); gridBagConstraints3.gridx = 0; gridBagConstraints3.gridy = 1; jLabel2 = new JLabel(); jLabel2.setText("文件大小"); GridBagConstraints gridBagConstraints2 = new GridBagConstraints(); gridBagConstraints2.gridx = 0; gridBagConstraints2.gridy = 4; jLabel1 = new JLabel(); jLabel1.setText("最后修改日期"); GridBagConstraints gridBagConstraints11 = new GridBagConstraints(); gridBagConstraints11.gridx = 0; gridBagConstraints11.gridy = 2; jLabel = new JLabel(); jLabel.setText("文件路径"); GridBagConstraints gridBagConstraints1 = new GridBagConstraints(); gridBagConstraints1.gridx = 1; gridBagConstraints1.fill = GridBagConstraints.HORIZONTAL; gridBagConstraints1.weightx = 1.0; gridBagConstraints1.insets = new Insets(0, 5, 0, 0); gridBagConstraints1.gridy = 0; fileLabel = new JLabel(); fileLabel.setText("文件名"); GridBagConstraints gridBagConstraints = new GridBagConstraints(); gridBagConstraints.gridx = 0; gridBagConstraints.insets = new Insets(0, 5, 0, 0); gridBagConstraints.gridy = 0; jPanel1 = new JPanel(); jPanel1.setLayout(new GridBagLayout()); jPanel1.add(getJButton(), gridBagConstraints); jPanel1.add(fileLabel, gridBagConstraints1); jPanel1.add(jLabel, gridBagConstraints11); jPanel1.add(jLabel1, gridBagConstraints2); jPanel1.add(jLabel2, gridBagConstraints3); jPanel1.add(jLabel3, gridBagConstraints4); jPanel1.add(getSizeField(), gridBagConstraints5); jPanel1.add(getPathField(), gridBagConstraints6); jPanel1.add(getUriField(), gridBagConstraints7); jPanel1.add(getModifyDateField(), gridBagConstraints8); } return jPanel1; } /** * 选择文件按钮 */ private JButton getJButton() { if (jButton == null) { jButton = new JButton(); jButton.setText("选择文件"); // 添加按钮事件监听器 jButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // 创建文件选择器 JFileChooser chooser = new JFileChooser(); // 显示文件打开对话框 chooser.showOpenDialog(ModifyFileAttribute.this); File file = chooser.getSelectedFile();// 获取选择文件 fileLabel.setText(file.getName());// 显示文件名称 sizeField.setText(file.length() + "");// 显示文件大小 pathField.setText(file.getPath());// 显示文件路径 pathField.select(0, 0); uriField.setText(file.toURI() + "");// 显示文件的URI路径 uriField.select(0, 0); // 显示文件最后修改时间 modifyDateField.setText(new Date(file.lastModified()) + ""); // 显示可读属性 readCheckBox.setSelected(file.canRead()); // 显示可写属性 writeCheckBox.setSelected(file.canWrite()); // 显示隐藏属性 hideCheckBox.setSelected(file.isHidden()); } }); } return jButton; } private JTextField getSizeField() { if (sizeField == null) { sizeField = new JTextField(); } return sizeField; } private JTextField getPathField() { if (pathField == null) { pathField = new JTextField(); } return pathField; } private JTextField getUriField() { if (uriField == null) { uriField = new JTextField(); } return uriField; } private JTextField getModifyDateField() { if (modifyDateField == null) { modifyDateField = new JTextField(); } return modifyDateField; } //这里是定义可读的复选框 private JCheckBox getReadCheckBox() { //如果为空的情况下我们来创建 if (readCheckBox == null) { //实例化复选框 readCheckBox = new JCheckBox(); //设置内容为可读 readCheckBox.setText("可读"); } //返回复选框 return readCheckBox; } //可以复选框 private JCheckBox getWriteCheckBox() { //在不为空的情况下创建 if (writeCheckBox == null) { //实例化复选框 writeCheckBox = new JCheckBox(); //设置内容为可写 writeCheckBox.setText("可写"); } //返回复选框 return writeCheckBox; } //隐藏复选框 private JCheckBox getHideCheckBox() { //为空的情情况下我们来创建 if (hideCheckBox == null) { //实例化复选框 hideCheckBox = new JCheckBox(); //设置复选框的内容 hideCheckBox.setText("隐藏"); } // /返回复选框 return hideCheckBox; } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { ModifyFileAttribute thisClass = new ModifyFileAttribute(); thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); thisClass.setVisible(true);=new 当前的类 } }); } private void initialize() { //文件大小 this.setSize(385, 226); //不可改变大小 this.setResizable(false); //添加容器面板 this.setContentPane(getJContentPane()); //标 this.setTitle("读取文件属性"); } //面板容器 private JPanel getJContentPane() { //先来判断面板容器是否为空，如果为空那么我们就业定义面板容器 if (jContentPane == null) { //边界布局 BorderLayout borderLayout = new BorderLayout(); //间距为0 borderLayout.setVgap(0); borderLayout.setHgap(0); //创建面板容器 jContentPane = new JPanel(); //面板容器设置布局格式 jContentPane.setLayout(borderLayout); //容器添加面板放到南 jContentPane.add(getJPanel(), BorderLayout.SOUTH); //容器添加板放到中间 jContentPane.add(getJPanel1(), BorderLayout.CENTER); } //返回容器 return jContentPane; } } 这个是我们今天上课时的课件，其实挺简单的，我做的就跟上面不同，但是结果呢，肯定是一样的 这个呢，是我做的，布局吗，有点丑，但是呢，结果还是一样的， 其实首先先做成这样一个面板 做成一个静态的 做成这个样子 首先要要知道需要上面组件 一个按钮 五个标签 四个文本框 还有一个复选框 首先就进行这样的排版 等下 这个出来了 然后在写一个 按钮事件 jb1.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub //创建文件显示器 JFileChooser chooser=new JFileChooser(); //显示文件打开对话框 chooser.showOpenDialog(null); //获取文件 File file=chooser.getSelectedFile(); jtf1.setText(file.length()+"");//获取文件大小 jtf2.setText(file.getPath());//获取文件路径 jtf3.setText(file.toURI()+"");//获取URL路径 jtf3.select(0,0); SimpleDateFormat sdf=new SimpleDateFormat("yyyy年MM月dd日"); String str=sdf.format(file.lastModified()); jtf4.setText(str); // 显示文件最后修改时间 // 显示可读属性 readCheckBox.setSelected(file.canRead()); // 显示可写属性 writeCheckBox.setSelected(file.canWrite()); // 显示隐藏属性 hideCheckBox.setSelected(file.isHidden()); } }); 其实真的很简单 只是时间不过 我的布局也就那样 但是功能是出来了