//工具类

public class PoiUtil {

public static final int PERCENT_WIDTH = 50;

public static final int PERCENT_HEIGHT = 20;

public static final float PXTOPT = 0.75f;

// draw cell line

/**

* @param sheet 页签

* @param i 行

* @param j 列

* @param width 单元格宽度

* @param height 单元格高度

*/

public static void drawLine(HSSFSheet sheet, int i, int j, int width, int height) {

int cellWidth = (int) (PERCENT_WIDTH * PXTOPT * width);

short cellHeight = (short) (PERCENT_HEIGHT * PXTOPT * height);

HSSFPatriarch patriarch = sheet.createDrawingPatriarch();

HSSFClientAnchor a = new HSSFClientAnchor(0, 0, 1023, 255, (short) j, i, (short) (j), i);

HSSFShapeGroup group = patriarch.createGroup(a);

float verticalPointsPerPixel = a.getAnchorHeightInPoints(sheet);

EscherGraphics g = new EscherGraphics(group, sheet.getWorkbook(), Color.black,

verticalPointsPerPixel);

EscherGraphics2d g2d = new EscherGraphics2d(g);

int[] xys = {width, height};

for (int l = 0; l < xys.length; l += 2) {

int x = (int) ((PERCENT_WIDTH * 0.75 * xys[l] / cellWidth) * 1023);

int y = (int) ((PERCENT_HEIGHT * 0.75 * xys[l + 1] / cellHeight) * 255);

//g2d.drawLine(0, 0, x, y); 左上右下

g2d.drawLine(0, y, x, 0);

}

}

public static HSSFCellStyle getCellFormat(HSSFWorkbook wb) {

HSSFCellStyle cellStyle = wb.createCellStyle();

if (cellStyle.getBorderBottom() != HSSFCellStyle.BORDER_THIN) {

cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);

}

if (cellStyle.getBorderLeft() != HSSFCellStyle.BORDER_THIN) {

cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);

}

if (cellStyle.getBorderTop() != HSSFCellStyle.BORDER_THIN) {

cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);

}

if (cellStyle.getBorderRight() != HSSFCellStyle.BORDER_THIN) {

cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);

}

cellStyle.setBottomBorderColor(createPette(wb));

cellStyle.setLeftBorderColor(createPette(wb));

cellStyle.setRightBorderColor(createPette(wb));

cellStyle.setTopBorderColor(createPette(wb));

return cellStyle;

}

public static short createPette(HSSFWorkbook wb) {

short petteIndex = 0;

Color rgb = new Color(0x00, 0x00, 0x00);

HSSFPalette palette = wb.getCustomPalette();

palette.setColorAtIndex(petteIndex, (byte) rgb.getRed(), (byte) rgb.getGreen(), (byte) rgb

.getBlue());

return petteIndex;

}

//调用地：

//sheet0操作页签,i行号，j列号,cell0当前单元格(通过row0获得)，row0当前行(通过sheet0获得)

PoiUtil.drawLine(sheet0, i, j, sheet0.getColumnWidth(cell0.getColumnIndex()), row0.getHeight());

效果：