基于JTable的列宽与内容自适应的实现方法

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！

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);