實現Java JTable的應用案例

2019-11-14 21:55:17

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實現java JTable的應用案例

代碼如下

import Java.awt.Component;   import java.awt.Dimension;   import java.awt.FontMetrics;     import javax.swing.JLabel;   import javax.swing.JTable;   import javax.swing.UIManager;   import javax.swing.table.DefaultTableCellRenderer;   import javax.swing.table.JTableHeader;   import javax.swing.table.TableColumnModel;     public class Main extends DefaultTableCellRenderer {           PRivate static final long serialVersionUID = 1L;        public Component getTableCellRendererComponent(JTable table, Object value,               boolean isSelected, boolean hasFocus, int row, int column) {             JTableHeader header = table.getTableHeader();           setForeground(header.getForeground());           setBackground(header.getBackground());           setFont(header.getFont());           setOpaque(true);           setBorder(UIManager.getBorder("TableHeader.cellBorder"));             // 得到列的寬度           TableColumnModel columnModel = table.getColumnModel();           int width = columnModel.getColumn(column).getWidth();             value = getShowValue(value.toString(), width);           setText(value.toString());           setSize(new Dimension(width, this.getHeight()));             setHorizontalAlignment(JLabel.CENTER);             return this;       }         private Object getShowValue(String value, int colWidth) {           FontMetrics fm = this.getFontMetrics(this.getFont());           int width = fm.stringWidth(value.toString());           int test = fm.stringWidth("好");           System.out.println(test * value.length());           System.out.println(width);           if (width < colWidth) {               return value;           }           StringBuffer sb = new StringBuffer("<html>");           char str;           int tempW = 0;           for (int i = 0; i < value.length(); i++) {               str = value.charAt(i);               tempW += fm.charWidth(str);               if (tempW > colWidth) {                   sb.append("<br>");                   tempW = 0;               }               sb.append(str);           }           sb.append("</html>");           return sb.toString();       }   }

　　運行結果<ignore_js_op>