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上一篇《Java实验--基于Swing的简单的歌曲信息管理系统(三) 》中,我们绘制了登录、注册和管理员主界面,本篇主要讲解歌曲管理界面。第一次涉及到对表格的操作,参见的教材上的代码,具体代码如下:
package test.swing; import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.ListSelectionModel; import javax.swing.table.DefaultTableModel; public class ExampleFrame_06 extends JFrame { /** * */ private static final long serialVersionUID = 1L; private DefaultTableModel tableModel;// 定义表格模型对象 private JTable table;// 定义表格对象 private JTextField aTextField; private JTextField bTextField; public static void main(String args[]) { ExampleFrame_06 frame = new ExampleFrame_06(); frame.setVisible(true); } public ExampleFrame_06() { super(); setTitle("维护表格模型"); setBounds(100, 100, 500, 375); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JScrollPane scrollPane = new JScrollPane(); getContentPane().add(scrollPane, BorderLayout.CENTER); String[] columnNames = { "A", "B" };// 定义表格列名数组 String[][] tableValues = { { "A1", "B1" }, { "A2", "B2" }, { "A3", "B3" } };// 定义表格数据数组 // 创建指定表格列名和表格数据的表格模型 tableModel = new DefaultTableModel(tableValues, columnNames); table = new JTable(tableModel);// 创建指定表格模型的表格 // table.setRowSorter(new TableRowSorter(tableModel));// 设置表格的排序器 // 设置表格的选择模式为单选 table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); // 为表格添加鼠标事件监听器 table.addMouseListener(new MouseAdapter() { // 发生了点击事件 public void mouseClicked(MouseEvent e) { // 获得被选中行的索引 int selectedRow = table.getSelectedRow(); // 从表格模型中获得指定单元格的值 Object oa = tableModel.getValueAt(selectedRow, 0); // 从表格模型中获得指定单元格的值 Object ob = tableModel.getValueAt(selectedRow, 1); aTextField.setText(oa.toString());// 将值赋值给文本框 bTextField.setText(ob.toString());// 将值赋值给文本框 } }); scrollPane.setViewportView(table); final JPanel panel = new JPanel(); getContentPane().add(panel, BorderLayout.SOUTH); panel.add(new JLabel("A:")); aTextField = new JTextField("A4", 10); panel.add(aTextField); panel.add(new JLabel("B:")); bTextField = new JTextField("B4", 10); panel.add(bTextField); final JButton addButton = new JButton("添加"); addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String[] rowValues = { aTextField.getText(), bTextField.getText() };// 创建表格行数组 tableModel.addRow(rowValues);// 向表格模型中添加一行 int rowCount = table.getRowCount() + 1; aTextField.setText("A" + rowCount); bTextField.setText("B" + rowCount); } }); panel.add(addButton); final JButton updButton = new JButton("修改"); updButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int selectedRow = table.getSelectedRow();// 获得被选中行的索引 if (selectedRow != -1) {// 判断是否存在被选中行 tableModel.setValueAt(aTextField.getText(), selectedRow, 0);// 修改表格模型当中的指定值 tableModel.setValueAt(bTextField.getText(), selectedRow, 1);// 修改表格模型当中的指定值 } } }); panel.add(updButton); final JButton delButton = new JButton("删除"); delButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int selectedRow = table.getSelectedRow();// 获得被选中行的索引 if (selectedRow != -1)// 判断是否存在被选中行 // 从表格模型当中删除指定行 tableModel.removeRow(selectedRow); } }); panel.add(delButton); } }
创建表格,使用JTable即可,表格中的数据一般使用java swing提供的DefaultTableModel即可,DefaultTableModel有如下构造方法,通过这种方式,可以设置表头和表格中的数据。然后再创建JTable时,把DefaultTableModel传入即可,再把表格给放入滚动面板JScrollPane就完成了。
创建表格的具体代码如下所示:
package test.swing; import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.ListSelectionModel; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableRowSorter; public class ExampleFrame_06 extends JFrame { /** * */ private static final long serialVersionUID = 1L; private DefaultTableModel tableModel;// 定义表格模型对象 private JTable table;// 定义表格对象 private JTextField aTextField; private JTextField bTextField; public static void main(String args[]) { ExampleFrame_06 frame = new ExampleFrame_06(); frame.setVisible(true); } public ExampleFrame_06() { super(); setTitle("维护表格模型"); setBounds(100, 100, 500, 375); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JScrollPane scrollPane = new JScrollPane(); getContentPane().add(scrollPane, BorderLayout.CENTER); String[] columnNames = { "A", "B" };// 定义表格列名数组 String[][] tableValues = { { "A1", "B1" }, { "A2", "B2" }, { "A3", "B3" } };// 定义表格数据数组 // 创建指定表格列名和表格数据的表格模型 tableModel = new DefaultTableModel(tableValues, columnNames); table = new JTable(tableModel);// 创建指定表格模型的表格 table.setRowSorter(new TableRowSorter(tableModel));// 设置表格的排序器 // 设置表格的选择模式为单选 table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); scrollPane.setViewportView(table); } }
我们给表格填充一些数据,再加一些按钮(添加、修改、删除)和输入框(用来输入数据),来对表格中的数据进行增改删操作。(代码部分参见上面的教材源码)让最终的界面看起来如下所示:
这里我们为表格添加鼠标事件监听器,想要得到的效果就是,当我们选中表格中的某一行时,将表格中的数据给显示在下面的输入框中。具体做法,先通过JTable的getSelectedRow()方法获取选中的行,再通过DefaultTableModel中的getValueAt(行,列)获取单元格里面的值,再将获取到的值赋到文本框即可。代码如下:
// 为表格添加鼠标事件监听器 table.addMouseListener(new MouseAdapter() { // 发生了点击事件 public void mouseClicked(MouseEvent e) { // 获得被选中行的索引 int selectedRow = table.getSelectedRow(); // 从表格模型中获得指定单元格的值 Object oa = tableModel.getValueAt(selectedRow, 0); // 从表格模型中获得指定单元格的值 Object ob = tableModel.getValueAt(selectedRow, 1); aTextField.setText(oa.toString());// 将值赋值给文本框 bTextField.setText(ob.toString());// 将值赋值给文本框 } });
添加一行,我们为添加按钮给添加监听器,输入从文本框中获取,使用DefaultTableModel中的addRow(String[] rowValues),来进行添加。具体代码如下
addButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String[] rowValues = { aTextField.getText(), bTextField.getText() };// 创建表格行数组 tableModel.addRow(rowValues);// 向表格模型中添加一行 int rowCount = table.getRowCount() + 1; aTextField.setText("A" + rowCount); bTextField.setText("B" + rowCount); } });
修改,都是先获取改行类容(需要检验改行是否在表格中存在),再进行修改。先为修改按钮给添加事件监听器,在使用DefaultTableModel中的为单元格赋值方法setValueAt(值,行号,列号)即可,具体代码如下:
updButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int selectedRow = table.getSelectedRow();// 获得被选中行的索引 if (selectedRow != -1) {// 判断是否存在被选中行 tableModel.setValueAt(aTextField.getText(), selectedRow, 0);// 修改表格模型当中的指定值 tableModel.setValueAt(bTextField.getText(), selectedRow, 1);// 修改表格模型当中的指定值 } } });
删除就比较简单了,先获取到行号,判断该行号是否有效,再使用DefaultTableModel提供的removeRow(行号),即可,具体代码如下。
delButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int selectedRow = table.getSelectedRow();// 获得被选中行的索引 if (selectedRow != -1)// 判断是否存在被选中行 // 从表格模型当中删除指定行 tableModel.removeRow(selectedRow); } });
其实,这里的难点就是如何显示数据,根据教材的代码,能够大致模仿写出,然后就根据就把后台的数据显示出来就好了。为了实现让表格里面的行为不可编辑的状态,所以自己定义一个类,继承至DefaultTableMode,重写了isCellEditable方法,设置为了false。其他的都没有变。如果当时静下心再想想,可能就会重写很多的方法(还好这些在用户管理里面做了),使用的时候也会更简单,代码也会更少。
其它的部分还有就是根据条件搜索,下面的JRadioButton和搜索框中显示的提示消息相对应等,之前考虑的是点击添加、删除、修改按钮,是弹出一个新的窗体来进行,无奈当时试了几次也不行(还好用户管理里面是这样实现的),只有模仿书上面的例子来做了,在表格的下面多增加了一排,里面包含了歌曲信息的输入框和增加、修改、删除的按钮,模仿例子来实现的。
设计图如下,歌曲管理的窗体(它是一个JInterFrame)出现在之前的DeskPanel面板中,歌曲管理的窗体中,有一个主面板用来存放所有的子面板,采用了边界布局模式。主面板的上部(NORTH)放的是一个子面板,主要用来存放搜索框和一行单选按钮;主面板的中部(CENTER)主要是用来放了一个滚动面板,用它来放一个表格;主面板的下部(SOUTH)放了一个子面板,主要用来存放一系列的输入框和几个按钮。
单选按钮处理,因为是单选按钮,所以需要把这些单选按钮给放入一个ButtonGroup中。其中表格的数据是从数据中查找出来的,再把List数据类型给转换成了二位数组类型,其实这里应该在Service层做。为了使单元格为不可编辑状态,在网上找了很久都没有找到办法,索性就定义了一个内部类(继承至DefaultTableModel),重写了isCellEditable方法,让其不可编辑,界面布局代码如下所示:
/** * 管理员--管理歌曲信息界面 * */ public class AdminSongManageView extends JInternalFrame { /** * */ private static final long serialVersionUID = 1L; private JPanel panelMain; // 主面板 private JPanel panelTop; // 主面板的上部 private JPanel panelSearch; // 搜索面板 private JLabel labKey; // 关键字 private JTextField tfSearch; // 搜索框 private JButton btnSearch; // 查找按钮 private JPanel panelSearchType; // 按什么查找 private ButtonGroup buttonGroup = new ButtonGroup(); private JRadioButton[] btnSearchTypes = new JRadioButton[4]; // 条件,如歌名,语言,类别,歌手 private JLabel labSearch; private JScrollPane panelTable; // 表格面板 private myTableModel tableModel;// 定义表格模型对象 private JTable table;// 定义表格对象 private JPanel panelBottom; // 底部面板,包括输入框,添加、删除、修改 private JLabel labName; private JLabel labLanguage; private JLabel labCategory; private JLabel labSinger; private JTextField tfName; // 输入歌曲名字 private JTextField tfLanguage; // 输入语言 private JTextField tfCategory; // 输入类别 private JTextField tfSinger; // 歌手 private JButton btnAdd; // 添加按钮 private JButton btnEdit; // 修改按钮 private JButton btnDelete; // 删除按钮 private SongService songService; public AdminSongManageView() { songService = new SongServiceImpl(); init(); } /** * 初始化各组件 */ private void init() { this.setTitle("歌曲管理"); this.setSize(new Dimension(750, 550)); this.setIconifiable(true); // 窗体最小化 this.setClosable(true); // 可被关闭 this.setDefaultCloseOperation(DISPOSE_ON_CLOSE); // 退出 panelMain = new JPanel(new BorderLayout()); panelTop = new JPanel(new GridLayout(2, 1, 0, 0)); panelTop.setLocation(0, 20); panelSearch = new JPanel(); panelSearch.setPreferredSize(new Dimension(750, 30)); labKey = new JLabel("关键字"); tfSearch = new JTextField("请输入歌名",20); tfSearch.setPreferredSize(new Dimension(100, 20)); btnSearch = new JButton("查找"); btnSearch.setPreferredSize(new Dimension(60, 20)); panelSearch.add(new JLabel()); panelSearch.add(labKey); panelSearch.add(tfSearch); panelSearch.add(new JLabel()); panelSearch.add(btnSearch); panelSearch.add(new JLabel()); panelTop.add(panelSearch); panelSearchType = new JPanel(); panelSearchType.setPreferredSize(new Dimension(750, 30)); labSearch = new JLabel("查询"); panelSearchType.add(labSearch); btnSearchTypes[0] = new JRadioButton("歌名", true); btnSearchTypes[1] = new JRadioButton("语言"); btnSearchTypes[2] = new JRadioButton("类别"); btnSearchTypes[3] = new JRadioButton("歌手"); // System.out.println("名字"+btnSearchTypes[1].getText()); for (JRadioButton jRadioButton : btnSearchTypes) { buttonGroup.add(jRadioButton); panelSearchType.add(jRadioButton); } panelTop.add(panelSearchType); panelMain.add(panelTop, BorderLayout.NORTH); String[] columnNames = { "id", "歌名", "语言", "类别", "歌手" }; // 从数据库中查询所有数据 List<Song> songs = songService.findAll(); System.out.println(songs); String[][] tableValues = new String[songs.size()][5]; for (int i = 0; i < songs.size(); i++) { tableValues[i][0] = songs.get(i).getId(); tableValues[i][1] = songs.get(i).getName(); tableValues[i][2] = songs.get(i).getLanguage(); tableValues[i][3] = songs.get(i).getCategory(); tableValues[i][4] = songs.get(i).getSinger(); // System.out.println(tableValues[i][0]); } tableModel = new myTableModel(tableValues, columnNames); tableModel.isCellEditable(0, 0); table = new JTable(tableModel); table.setRowHeight(20); // 设置行高 table.getTableHeader().setBackground(Color.GRAY); // 表头颜色 table.setLocation(20, 80); table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); // 只能选中单行 panelTable = new JScrollPane(table); panelTable.setBorder(BorderFactory.createTitledBorder("歌曲信息")); panelMain.add(panelTable, BorderLayout.CENTER); panelBottom = new JPanel(); labName = new JLabel("歌名"); tfName = new JTextField(8); labLanguage = new JLabel("语言"); tfLanguage = new JTextField(8); labCategory = new JLabel("类别"); tfCategory = new JTextField(8); labSinger = new JLabel("歌手"); tfSinger = new JTextField(8); panelBottom.add(labName); panelBottom.add(tfName); panelBottom.add(labLanguage); panelBottom.add(tfLanguage); panelBottom.add(labCategory); panelBottom.add(tfCategory); panelBottom.add(labSinger); panelBottom.add(tfSinger); btnAdd = new JButton("增加"); btnEdit = new JButton("修改"); btnDelete = new JButton("删除"); panelBottom.add(btnAdd); panelBottom.add(btnEdit); panelBottom.add(btnDelete); panelMain.add(panelBottom, BorderLayout.SOUTH); this.getContentPane().add(panelMain); this.setVisible(true); // System.out.println("1234"); } /** * myTableModel,继承DefaultTableModel, * 只重写了isCellEditable,让其不可编辑 * */ private class myTableModel extends DefaultTableModel { /** * */ private static final long serialVersionUID = 1L; public myTableModel(Object[][] data, Object[] columnNames) { super(data, columnNames); // TODO Auto-generated constructor stub } // 让表格不可编辑,重写了DefaultTableModel中的方法 public boolean isCellEditable(int row, int column) { return false; } } }
实际效果如下图所示:
同理,为表格添加鼠标点击事件,具体代码如下所示:
table.addMouseListener(new MouseAdapter() { // 发生了点击事件 public void mouseClicked(MouseEvent e) { // 获得被选中行的索引 int selectedRow = table.getSelectedRow(); // 从表格模型中获得指定单元格的值 // Object id = tableModel.getValueAt(selectedRow, 0); Object name = tableModel.getValueAt(selectedRow, 1); Object language = tableModel.getValueAt(selectedRow, 2); Object category = tableModel.getValueAt(selectedRow, 3); Object singer = tableModel.getValueAt(selectedRow, 4); tfName.setText(name.toString()); tfLanguage.setText(language.toString()); tfCategory.setText(category.toString()); tfSinger.setText(singer.toString()); } }); }
增加、修改、删除和前面的类似,只是要涉及到对数据库的操作了。代码如下所示:
/** * 添加一行 */ private void addTableRow() { btnAdd.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // String[] rowValues = {"add",tfName.getText(),tfLanguage.getText(), // tfCategory.getText(),tfSinger.getText()}; String name = tfName.getText().trim(); String language = tfLanguage.getText().trim(); String category = tfCategory.getText(); String singer = tfSinger.getText(); if (name.equals("") || name == null || language.equals("") || language == null || category.equals("") || category == null || singer.equals("") || singer == null) { JOptionPane.showMessageDialog(panelTable, "不能为空", "信息提示框", JOptionPane.INFORMATION_MESSAGE); return; } Song song = new Song(Common.getUuid(),name,language, category, singer); String[] rowValues = new String[5]; if (songService.addSong(song)) { JOptionPane.showMessageDialog(panelMain, "添加成功", "信息提示框", JOptionPane.INFORMATION_MESSAGE); rowValues[0] = song.getId(); rowValues[1] = song.getName(); rowValues[2] = song.getLanguage(); rowValues[3] = song.getCategory(); rowValues[4] = song.getSinger(); // 将输入框清空 tfName.setText(""); tfCategory.setText(""); tfSearch.setText(""); tfLanguage.setText(""); // 将新增的行加入表格中 tableModel.addRow(rowValues); } else { JOptionPane.showMessageDialog(panelTable, "添加失败", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } } }); } /** * 修改信息 */ private void editTableRow() { btnEdit.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int selectedRow = table.getSelectedRow(); // 获取被选中行的索引 Song song = new Song(); if (selectedRow != -1) { // 判断是否存在被选中行 // System.out.println(tableModel.getValueAt(selectedRow, 0)); song.setId(tableModel.getValueAt(selectedRow, 0).toString()); song.setName(tfName.getText()); song.setLanguage(tfLanguage.getText()); song.setCategory(tfCategory.getText()); song.setSinger(tfSinger.getText()); if (songService.updateSong(song)) { song = songService.findById(song.getId()); JOptionPane.showMessageDialog(panelMain, "修改成功", "信息提示框", JOptionPane.INFORMATION_MESSAGE); tableModel.setValueAt(song.getId(), selectedRow, 0); tableModel.setValueAt(song.getName(), selectedRow, 1); tableModel.setValueAt(song.getLanguage(), selectedRow, 2); tableModel.setValueAt(song.getCategory(), selectedRow, 3); tableModel.setValueAt(song.getSinger(), selectedRow, 4); } else { JOptionPane.showMessageDialog(panelTable, "修改失败", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } } } }); } /** * 删除一条信息 */ private void deleteTableRow() { btnDelete.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int selectedRow = table.getSelectedRow(); // 获取被选中行的索引 if (selectedRow != -1) { String id = tableModel.getValueAt(selectedRow, 0).toString(); if (songService.deletSong(id)) { JOptionPane.showMessageDialog(panelMain, "删除成功", "信息提示框", JOptionPane.INFORMATION_MESSAGE); // 将输入框清空 tfName.setText(""); tfCategory.setText(""); tfSearch.setText(""); tfLanguage.setText(""); tableModel.removeRow(selectedRow); } else { JOptionPane.showMessageDialog(panelTable, "删除失败", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } } } }); }
现在只剩下了对查询的处理。
为了实现,当我们点击下面的单选按钮,搜索输入框中提示相应的消息,所以需要为单选按钮添加事件监听器,代码如下所示:
/** * 获取勾选框中的值,将该值的信息给放入到tfsearch中,用作提示信息 */ private void getSearchTypeValue() { for (JRadioButton jRadioButton : btnSearchTypes) { jRadioButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jRadioButton.setSelected(true); // 将该jRadioButton设置为选中状态 String type = jRadioButton.getText(); tfSearch.setText("请输入" + type); // System.out.println(type); } }); } }
我们还需要为搜索输入框给加一个光标进入的事件,当光标移入时,我们把提示信息给清空(之前一直再想为什么java swing中没有html中的placeholder属性),具体代码如下:
/** * 处理输入框的提示消息处理,当光标进入search输入框时,将输入框清空 */ private void displayMessage() { tfSearch.addFocusListener(new FocusAdapter() { public void focusGained(FocusEvent e) { tfSearch.setText(""); } }); }
下面就是具体的查询了,再把查询到数据显示在表中之前,我们需要先使用DefaultTableModel中的setRowCount(0),将表格清空(其实是设置表格的行数为0行,以达到清空的目的)。所以把该步骤给提取了出来,单独封装成一个方法,具体代码如下所示:
// 查询时使用,清空表格数据,再重新添加行 private void fillSonginfoToTable(List<Song> songs) { // 判断一下是否有数据 if (songs.isEmpty()) { JOptionPane.showMessageDialog(panelMain, "Sorry, 未查询到数据,请从新输入", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } tableModel.setRowCount(0); // 将表格清空 String[][] tableValues = new String[songs.size()][5]; // 重新装填数据 for (int j = 0; j < songs.size(); j++) { tableValues[j][0] = songs.get(j).getId(); tableValues[j][1] = songs.get(j).getName(); tableValues[j][2] = songs.get(j).getLanguage(); tableValues[j][3] = songs.get(j).getCategory(); tableValues[j][4] = songs.get(j).getSinger(); tableModel.addRow(tableValues[j]); }
}
至于查询,就是为查询按钮给添加事件监听器,按照单选框按钮的值和搜索输入框中的值进行查询,调用service层中的方法就行了,比较简单,具体代码如下:
btnSearch.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { List<Song> songs = null; String type = "歌名"; for (int i = 0; i < btnSearchTypes.length; i++) { if (btnSearchTypes[i].isSelected()) { type = btnSearchTypes[i].getText(); } } if ("歌名".equals(type)) { String name = tfSearch.getText(); System.out.println("name:" + name); songs = songService.findByName(name); // System.out.println("查询出来的"+songs); } else if ("歌手".equals(type)) { String singer = tfSearch.getText(); songs = songService.findBySinger(singer); // System.out.println("查询出来的"+songs); } else if ("语言".equals(type)) { String language = tfSearch.getText(); songs = songService.findBylanguage(language); // System.out.println("查询出来的"+songs); } else if ("类别".equals(type)) { String category = tfSearch.getText(); songs = songService.findByCategory(category); // System.out.println("查询出来的"+songs); } else { JOptionPane.showMessageDialog(panelMain, "请选择查询类型", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } fillSonginfoToTable(songs); } }); }
歌曲管理业务层的接口和实现类的完整代码如下:
SongService.java,接口
package shiyan6.service; import java.util.List; import shiyan6.entity.Song; public interface SongService { /** * 显示所有歌曲 * @return */ List<Song> findAll(); /** * 通过id查找信息 * @return */ Song findById(String id); /** * 按条件歌曲名查询歌曲 * @param condition * @return */ List<Song> findByName(String name); /** * 按语言查询歌曲 * @param language * @return */ List<Song> findBylanguage(String language); /** * 根据歌手来查询歌曲 * @param singer * @return */ List<Song> findBySinger(String singer); /** * 格局歌曲类别来查询歌曲 * @param category * @return */ List<Song> findByCategory(String category); /** * 删除歌曲 * @param id * @return */ boolean deletSong(String id); /** * 添加歌曲 * @param song * @return */ boolean addSong(Song song); /** * 修改歌曲 * @param song * @return */ boolean updateSong(Song song); }
SongServiceImpl.java,实现类
package shiyan6.service; import java.util.List; import shiyan6.dao.SongDao; import shiyan6.dao.SongDaoImpl; import shiyan6.entity.Song; public class SongServiceImpl implements SongService { private SongDao songDao; public SongServiceImpl() { songDao = new SongDaoImpl(); } @Override public List<Song> findAll() { return songDao.findAll(); } @Override public Song findById(String id) { return songDao.findById(id); } @Override public List<Song> findByName(String name) { return songDao.findByName(name); } @Override public List<Song> findBylanguage(String language) { return songDao.findBylanguage(language); } @Override public List<Song> findBySinger(String singer) { return songDao.findBySinger(singer); } @Override public List<Song> findByCategory(String category) { return songDao.findByCategory(category); } @Override public boolean deletSong(String id) { return songDao.deletSong(id); } @Override public boolean addSong(Song song) { return songDao.addSong(song); } @Override public boolean updateSong(Song song) { return songDao.updateSong(song); } }
歌曲管理界面的完整代码
package shiyan6.view; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.FocusAdapter; import java.awt.event.FocusEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.util.List; import javax.swing.BorderFactory; import javax.swing.ButtonGroup; import javax.swing.JButton; import javax.swing.JInternalFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.ListSelectionModel; import javax.swing.table.DefaultTableModel; import shiyan6.entity.Song; import shiyan6.service.SongService; import shiyan6.service.SongServiceImpl; import shiyan6.util.Common; /** * 管理员--管理歌曲信息界面 * */ public class AdminSongManageView extends JInternalFrame { /** * */ private static final long serialVersionUID = 1L; private JPanel panelMain; // 主面板 private JPanel panelTop; // 主面板的上部 private JPanel panelSearch; // 搜索面板 private JLabel labKey; // 关键字 private JTextField tfSearch; // 搜索框 private JButton btnSearch; // 查找按钮 private JPanel panelSearchType; // 按什么查找 private ButtonGroup buttonGroup = new ButtonGroup(); private JRadioButton[] btnSearchTypes = new JRadioButton[4]; // 条件,如歌名,语言,类别,歌手 private JLabel labSearch; private JScrollPane panelTable; // 表格面板 private myTableModel tableModel;// 定义表格模型对象 private JTable table;// 定义表格对象 private JPanel panelBottom; // 底部面板,包括输入框,添加、删除、修改 private JLabel labName; private JLabel labLanguage; private JLabel labCategory; private JLabel labSinger; private JTextField tfName; // 输入歌曲名字 private JTextField tfLanguage; // 输入语言 private JTextField tfCategory; // 输入类别 private JTextField tfSinger; // 歌手 private JButton btnAdd; // 添加按钮 private JButton btnEdit; // 修改按钮 private JButton btnDelete; // 删除按钮 private SongService songService; public AdminSongManageView() { songService = new SongServiceImpl(); init(); getTableSelectedRow(); addTableRow(); editTableRow(); deleteTableRow(); getSearchTypeValue(); displayMessage(); find(); System.out.println("songmanagerView"); } /** * 初始化各组件 */ private void init() { this.setTitle("歌曲管理"); this.setSize(new Dimension(750, 550)); this.setIconifiable(true); // 窗体最小化 this.setClosable(true); // 可被关闭 this.setDefaultCloseOperation(DISPOSE_ON_CLOSE); // 退出 panelMain = new JPanel(new BorderLayout()); panelTop = new JPanel(new GridLayout(2, 1, 0, 0)); panelTop.setLocation(0, 20); panelSearch = new JPanel(); panelSearch.setPreferredSize(new Dimension(750, 30)); labKey = new JLabel("关键字"); tfSearch = new JTextField("请输入歌名",20); tfSearch.setPreferredSize(new Dimension(100, 20)); btnSearch = new JButton("查找"); btnSearch.setPreferredSize(new Dimension(60, 20)); panelSearch.add(new JLabel()); panelSearch.add(labKey); panelSearch.add(tfSearch); panelSearch.add(new JLabel()); panelSearch.add(btnSearch); panelSearch.add(new JLabel()); panelTop.add(panelSearch); panelSearchType = new JPanel(); panelSearchType.setPreferredSize(new Dimension(750, 30)); labSearch = new JLabel("查询"); panelSearchType.add(labSearch); btnSearchTypes[0] = new JRadioButton("歌名", true); btnSearchTypes[1] = new JRadioButton("语言"); btnSearchTypes[2] = new JRadioButton("类别"); btnSearchTypes[3] = new JRadioButton("歌手"); // System.out.println("名字"+btnSearchTypes[1].getText()); for (JRadioButton jRadioButton : btnSearchTypes) { buttonGroup.add(jRadioButton); panelSearchType.add(jRadioButton); } panelTop.add(panelSearchType); panelMain.add(panelTop, BorderLayout.NORTH); String[] columnNames = { "id", "歌名", "语言", "类别", "歌手" }; // 从数据库中查询所有数据 List<Song> songs = songService.findAll(); System.out.println(songs); String[][] tableValues = new String[songs.size()][5]; for (int i = 0; i < songs.size(); i++) { tableValues[i][0] = songs.get(i).getId(); tableValues[i][1] = songs.get(i).getName(); tableValues[i][2] = songs.get(i).getLanguage(); tableValues[i][3] = songs.get(i).getCategory(); tableValues[i][4] = songs.get(i).getSinger(); // System.out.println(tableValues[i][0]); } // String[][] tableValues = {{"1", "1", "1", "1", "1"}, // {"2", "2", "2", "2", "2"}, // {"3", "3", "3", "3", "3"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"3", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"}, // {"4", "1", "1", "1", "1"} // }; tableModel = new myTableModel(tableValues, columnNames); tableModel.isCellEditable(0, 0); table = new JTable(tableModel); // table.setRowSorter(new TableRowSorter<>(tableModel)); // 不可排序 table.setRowHeight(20); // 设置行高 table.getTableHeader().setBackground(Color.GRAY); // 表头颜色 table.setLocation(20, 80); table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); // 只能选中单行 // table.setEnabled(false); // 设置表格为不可编辑 panelTable = new JScrollPane(table); panelTable.setBorder(BorderFactory.createTitledBorder("歌曲信息")); panelMain.add(panelTable, BorderLayout.CENTER); panelBottom = new JPanel(); labName = new JLabel("歌名"); tfName = new JTextField(8); labLanguage = new JLabel("语言"); tfLanguage = new JTextField(8); labCategory = new JLabel("类别"); tfCategory = new JTextField(8); labSinger = new JLabel("歌手"); tfSinger = new JTextField(8); panelBottom.add(labName); panelBottom.add(tfName); panelBottom.add(labLanguage); panelBottom.add(tfLanguage); panelBottom.add(labCategory); panelBottom.add(tfCategory); panelBottom.add(labSinger); panelBottom.add(tfSinger); btnAdd = new JButton("增加"); btnEdit = new JButton("修改"); btnDelete = new JButton("删除"); panelBottom.add(btnAdd); panelBottom.add(btnEdit); panelBottom.add(btnDelete); panelMain.add(panelBottom, BorderLayout.SOUTH); this.getContentPane().add(panelMain); this.setVisible(true); // System.out.println("1234"); } /** * 获取选中的表格的一行 */ private void getTableSelectedRow() { table.addMouseListener(new MouseAdapter() { // 发生了点击事件 public void mouseClicked(MouseEvent e) { // 获得被选中行的索引 int selectedRow = table.getSelectedRow(); // 从表格模型中获得指定单元格的值 // Object id = tableModel.getValueAt(selectedRow, 0); Object name = tableModel.getValueAt(selectedRow, 1); Object language = tableModel.getValueAt(selectedRow, 2); Object category = tableModel.getValueAt(selectedRow, 3); Object singer = tableModel.getValueAt(selectedRow, 4); tfName.setText(name.toString()); tfLanguage.setText(language.toString()); tfCategory.setText(category.toString()); tfSinger.setText(singer.toString()); } }); } /** * 添加一行 */ private void addTableRow() { btnAdd.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // String[] rowValues = {"add",tfName.getText(),tfLanguage.getText(), // tfCategory.getText(),tfSinger.getText()}; String name = tfName.getText().trim(); String language = tfLanguage.getText().trim(); String category = tfCategory.getText(); String singer = tfSinger.getText(); if (name.equals("") || name == null || language.equals("") || language == null || category.equals("") || category == null || singer.equals("") || singer == null) { JOptionPane.showMessageDialog(panelTable, "不能为空", "信息提示框", JOptionPane.INFORMATION_MESSAGE); return; } Song song = new Song(Common.getUuid(),name,language, category, singer); String[] rowValues = new String[5]; if (songService.addSong(song)) { JOptionPane.showMessageDialog(panelMain, "添加成功", "信息提示框", JOptionPane.INFORMATION_MESSAGE); rowValues[0] = song.getId(); rowValues[1] = song.getName(); rowValues[2] = song.getLanguage(); rowValues[3] = song.getCategory(); rowValues[4] = song.getSinger(); // 将输入框清空 tfName.setText(""); tfCategory.setText(""); tfSearch.setText(""); tfLanguage.setText(""); // 将新增的行加入表格中 tableModel.addRow(rowValues); } else { JOptionPane.showMessageDialog(panelTable, "添加失败", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } // int preCount = table.getRowCount(); // System.out.println(preCount); // tableModel.addRow(rowValues); // int rowCount = table.getRowCount(); // System.out.println(rowCount); // try { // if (rowCount > preCount) { // // String id = tableModel.getValueAt(rowCount, 0).toString(); // String name = tableModel.getValueAt(rowCount, 1).toString(); // String language = tableModel.getValueAt(rowCount, 2).toString(); // String category = tableModel.getValueAt(rowCount, 3).toString(); // String singer = tableModel.getValueAt(rowCount, 4).toString(); // // tfName.setText(name); // tfLanguage.setText(language); // tfCategory.setText(category); // tfSinger.setText(singer); // } // } catch (Exception e2) { // // TODO: handle exception // } } }); } /** * 修改信息 */ private void editTableRow() { btnEdit.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int selectedRow = table.getSelectedRow(); // 获取被选中行的索引 Song song = new Song(); if (selectedRow != -1) { // 判断是否存在被选中行 // System.out.println(tableModel.getValueAt(selectedRow, 0)); song.setId(tableModel.getValueAt(selectedRow, 0).toString()); song.setName(tfName.getText()); song.setLanguage(tfLanguage.getText()); song.setCategory(tfCategory.getText()); song.setSinger(tfSinger.getText()); if (songService.updateSong(song)) { song = songService.findById(song.getId()); JOptionPane.showMessageDialog(panelMain, "修改成功", "信息提示框", JOptionPane.INFORMATION_MESSAGE); tableModel.setValueAt(song.getId(), selectedRow, 0); tableModel.setValueAt(song.getName(), selectedRow, 1); tableModel.setValueAt(song.getLanguage(), selectedRow, 2); tableModel.setValueAt(song.getCategory(), selectedRow, 3); tableModel.setValueAt(song.getSinger(), selectedRow, 4); } else { JOptionPane.showMessageDialog(panelTable, "修改失败", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } } } }); } /** * 删除一条信息 */ private void deleteTableRow() { btnDelete.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { int selectedRow = table.getSelectedRow(); // 获取被选中行的索引 if (selectedRow != -1) { String id = tableModel.getValueAt(selectedRow, 0).toString(); if (songService.deletSong(id)) { JOptionPane.showMessageDialog(panelMain, "删除成功", "信息提示框", JOptionPane.INFORMATION_MESSAGE); // 将输入框清空 tfName.setText(""); tfCategory.setText(""); tfSearch.setText(""); tfLanguage.setText(""); tableModel.removeRow(selectedRow); } else { JOptionPane.showMessageDialog(panelTable, "删除失败", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } } } }); } /** * 获取勾选框中的值,将该值的信息给放入到tfsearch中,用作提示信息 */ private void getSearchTypeValue() { for (JRadioButton jRadioButton : btnSearchTypes) { jRadioButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { jRadioButton.setSelected(true); // 将该jRadioButton设置为选中状态 String type = jRadioButton.getText(); tfSearch.setText("请输入" + type); // System.out.println(type); } }); } } /** * 查询 */ private void find() { btnSearch.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { List<Song> songs = null; String type = "歌名"; for (int i = 0; i < btnSearchTypes.length; i++) { if (btnSearchTypes[i].isSelected()) { type = btnSearchTypes[i].getText(); } } if ("歌名".equals(type)) { String name = tfSearch.getText(); System.out.println("name:" + name); songs = songService.findByName(name); // System.out.println("查询出来的"+songs); } else if ("歌手".equals(type)) { String singer = tfSearch.getText(); songs = songService.findBySinger(singer); // System.out.println("查询出来的"+songs); } else if ("语言".equals(type)) { String language = tfSearch.getText(); songs = songService.findBylanguage(language); // System.out.println("查询出来的"+songs); } else if ("类别".equals(type)) { String category = tfSearch.getText(); songs = songService.findByCategory(category); // System.out.println("查询出来的"+songs); } else { JOptionPane.showMessageDialog(panelMain, "请选择查询类型", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } fillSonginfoToTable(songs); } }); } // 查询时使用,清空表格数据,再重新添加行 private void fillSonginfoToTable(List<Song> songs) { if (songs.isEmpty()) { JOptionPane.showMessageDialog(panelMain, "Sorry, 未查询到数据,请从新输入", "信息提示框", JOptionPane.INFORMATION_MESSAGE); } tableModel.setRowCount(0); // 将表格清空 String[][] tableValues = new String[songs.size()][5]; // 重新装填数据 for (int j = 0; j < songs.size(); j++) { tableValues[j][0] = songs.get(j).getId(); tableValues[j][1] = songs.get(j).getName(); tableValues[j][2] = songs.get(j).getLanguage(); tableValues[j][3] = songs.get(j).getCategory(); tableValues[j][4] = songs.get(j).getSinger(); // System.out.println(tableValues[j][0]); tableModel.addRow(tableValues[j]); } } /** * 处理输入框的提示消息处理,当光标进入search输入框时,将输入框清空 */ private void displayMessage() { tfSearch.addFocusListener(new FocusAdapter() { public void focusGained(FocusEvent e) { tfSearch.setText(""); } }); } /** * myTableModel,继承DefaultTableModel, * 只重写了isCellEditable,让其不可编辑 * */ private class myTableModel extends DefaultTableModel { /** * */ private static final long serialVersionUID = 1L; public myTableModel(Object[][] data, Object[] columnNames) { super(data, columnNames); // TODO Auto-generated constructor stub } // 让表格不可编辑,重写了DefaultTableModel中的方法 public boolean isCellEditable(int row, int column) { return false; } } }
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