poi添加注解

HSSFPatriarch patr = sheet.createDrawingPatriarch();

  HSSFComment comment ;

 comment = patr.createCellComment(new HSSFClientAnchor(0, 0,
    0, 0, (short) 0, 0, (short) 3, 3));
  comment.setString(new HSSFRichTextString(commenttext));

 sheet.getRow(row).getCell(cell).setCellComment(comment);

HSSFPatriarch： 画图的顶级管理器； 

HSSFRichTextString ： 将String型字符转为Unicode型String。Rich text unicode string. These strings can have fonts applied to arbitary parts of the string. 

HSSFClientAnchor : 添加多个图片时:多个pic应该share同一个DrawingPatriarch在同一个sheet里面。public HSSFClientAnchor(int dx1,
                        int dy1,
                        int dx2,
                        int dy2,
                        short col1,
                        int row1,
                        short col2,
                        int row2)

Creates a new client anchor and sets the top-left and bottom-right coordinates of the anchor.

Parameters:

dx1 - the x coordinate within the first cell.

dy1 - the y coordinate within the first cell.

dx2 - the x coordinate within the second cell.

dy2 - the y coordinate within the second cell.

col1 - the column (0 based) of the first cell.

row1 - the row (0 based) of the first cell.

col2 - the column (0 based) of the second cell.

row2 - the row (0 based) of the second cell.

HSSFAnchor HSSFClientAnchor的父类。An anchor is what specifics the position of a shape within a client object or within another containing shape.