java swing jtable 打印+打印预览（求代码）

JTABLE中有合并的单元格，要考虑到合并单元格分页打印的情况！

使用JTABLE做出和打印预览一样的分页效果然后PAINT出来就可以了！

这个很多都发过帖子了 你可以搜搜

不懂啦。。。。。。

JDK 1.4+ import javax.swing.*; import javax.swing.table.*; import java.awt.*; import java.util.*; public class TextAreaRenderer extends JTextArea implements TableCellRenderer { private final DefaultTableCellRenderer adaptee = new DefaultTableCellRenderer(); private final Map cellSizes = new HashMap(); public TextAreaRenderer() { setLineWrap(true); setWrapStyleWord(true); } public Component getTableCellRendererComponent(// JTable table, Object obj, boolean isSelected, boolean hasFocus, int row, int column) { // set the colours, etc. using the standard for that platform adaptee.getTableCellRendererComponent(table, obj, isSelected, hasFocus, row, column); setForeground(adaptee.getForeground()); setBackground(adaptee.getBackground()); setBorder(adaptee.getBorder()); setFont(adaptee.getFont()); setText(adaptee.getText()); // This line was very important to get it working with JDK1.4 TableColumnModel columnModel = table.getColumnModel(); setSize(columnModel.getColumn(column).getWidth(), 100000); int height_wanted = (int) getPreferredSize().getHeight(); addSize(table, row, column, height_wanted); height_wanted = findTotalMaximumRowSize(table, row); if (height_wanted != table.getRowHeight(row)) { table.setRowHeight(row, height_wanted); } return this; } private void addSize(JTable table, int row, int column, int height) { Map rows = (Map) cellSizes.get(table); if (rows == null) { cellSizes.put(table, rows = new HashMap()); } Map rowheights = (Map) rows.get(new Integer(row)); if (rowheights == null) { rows.put(new Integer(row), rowheights = new HashMap()); } rowheights.put(new Integer(column), new Integer(height)); } private int findTotalMaximumRowSize(JTable table, int row) { int maximum_height = 0; Enumeration columns = table.getColumnModel().getColumns(); while (columns.hasMoreElements()) { TableColumn tc = (TableColumn) columns.nextElement(); TableCellRenderer cellRenderer = tc.getCellRenderer(); if (cellRenderer instanceof TextAreaRenderer) { TextAreaRenderer tar = (TextAreaRenderer) cellRenderer; maximum_height = Math.max(maximum_height, tar.findMaximumRowSize(table, row)); } } return maximum_height; } private int findMaximumRowSize(JTable table, int row) { Map rows = (Map) cellSizes.get(table); if (rows == null) return 0; Map rowheights = (Map) rows.get(new Integer(row)); if (rowheights == null) return 0; int maximum_height = 0; for (Iterator it = rowheights.entrySet().iterator(); it.hasNext();) { Map.Entry entry = (Map.Entry) it.next(); int cellHeight = ((Integer) entry.getValue()).intValue(); maximum_height = Math.max(maximum_height, cellHeight); } return maximum_height; } } import javax.swing.*; public class TextAreaEditor extends DefaultCellEditor { public TextAreaEditor() { super(new JTextField()); final JTextArea textArea = new JTextArea(); textArea.setWrapStyleWord(true); textArea.setLineWrap(true); JScrollPane scrollPane = new JScrollPane(textArea); scrollPane.setBorder(null); editorComponent = scrollPane; delegate = new DefaultCellEditor.EditorDelegate() { public void setValue(Object value) { textArea.setText((value != null) ? value.toString() : ""); } public Object getCellEditorValue() { return textArea.getText(); } }; } } import javax.swing.*; import javax.swing.table.*; public class TextAreaRendererTest extends JFrame { private final JTable table = new JTable(10, 4); public TextAreaRendererTest() { super(System.getProperty("java.vm.version")); // We use our cell renderer for columns 1, 2, 3 TableColumnModel cmodel = table.getColumnModel(); TextAreaRenderer textAreaRenderer = new TextAreaRenderer(); cmodel.getColumn(1).setCellRenderer(textAreaRenderer); cmodel.getColumn(2).setCellRenderer(new TextAreaRenderer()); // I am demonstrating that you can have several renderers in // one table, and they communicate with one another in // deciding the row height. cmodel.getColumn(3).setCellRenderer(textAreaRenderer); TextAreaEditor textEditor = new TextAreaEditor(); cmodel.getColumn(1).setCellEditor(textEditor); cmodel.getColumn(2).setCellEditor(textEditor); cmodel.getColumn(3).setCellEditor(textEditor); String test = "The lazy dog jumps over the quick brown fox"; for (int column = 0; column < 4; column++) { table.setValueAt(test, 0, column); table.setValueAt(test, 4, column); } test = test + test + test + test + test + test + test + test; table.setValueAt(test, 4, 2); getContentPane().add(new JScrollPane(table)); setSize(600, 600); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); } public static void main(String[] args) { new TextAreaRendererTest(); } } 我的例子 自己看看

hibernate都设置好了吗？

假设入库调用了以下的方法：

public void persist(list<item> items);

（item是商品的类）

session session = hibernateutil.getsessionfactory().getcurrentsession(); session.begintransaction();

for(item item: items)

    session.save(item); session.gettransaction().commit();

// hibernateutil的代码如下

import org.hibernate.sessionfactory; import org.hibernate.cfg.configuration; public class hibernateutil

{

    private static final sessionfactory sessionfactory = buildsessionfactory();     private static sessionfactory buildsessionfactory()

    {     try

    {     // create the sessionfactory from hibernate.cfg.xml     return new configuration().configure().buildsessionfactory();     }     catch(throwable ex)

    {     // make sure you log the exception, as it might be swallowed     system.err.println("initial sessionfactory creation failed." + ex);     throw new runtimeexception(ex);     }     }     public static sessionfactory getsessionfactory()

    {     return sessionfactory;     } }

我是觉得jpa比hibernate好用点……

在JDK的DEMO中有，单元格的打印 及打印预览的代码。 但那里没有合并单元格的情况。不过你可以试一下。