poi导出excel在单元格内画斜线

HSSFSheet sheet = workbook.getSheet("123");
			HSSFRow row = sheet.getRow(0);
			HSSFCell cell0 = row.getCell(0);
	        cell0.setCellValue("学号            信息") ;  
	        //画线(由左上到右下的斜线)  在A1的第一个cell（单位  分类）加入一条对角线 
	        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();  
	        HSSFClientAnchor a = new HSSFClientAnchor(0, 0, 1023, 255, (short)0, 0, (short)0, 0);  
	        HSSFSimpleShape shape1 = patriarch.createSimpleShape(a);  
	        shape1.setShapeType(HSSFSimpleShape.OBJECT_TYPE_LINE);   
	        shape1.setLineStyle(HSSFSimpleShape.LINESTYLE_SOLID) ;