JTable默认的各列宽度平均，下函数可以实现各列宽度与内容长度适应！

复制代码 代码如下:

public void FitTableColumns(JTable myTable){

JTableHeader header = myTable.getTableHeader();

int rowCount = myTable.getRowCount();

Enumeration columns = myTable.getColumnModel().getColumns();

while(columns.hasMoreElements()){

TableColumn column = (TableColumn)columns.nextElement();

int col = header.getColumnModel().getColumnIndex(column.getIdentifier());

int width = (int)myTable.getTableHeader().getDefaultRenderer()

.getTableCellRendererComponent(myTable, column.getIdentifier()

, false, false, -1, col).getPreferredSize().getWidth();

for(int row = 0; row<rowCount; row++){

int preferedWidth = (int)myTable.getCellRenderer(row, col).getTableCellRendererComponent(myTable,

myTable.getValueAt(row, col), false, false, row, col).getPreferredSize().getWidth();

width = Math.max(width, preferedWidth);

}

header.setResizingColumn(column); // 此行很重要

column.setWidth(width+myTable.getIntercellSpacing().width);

}

使用方法：FitTableColumns(yourTableName);