需要使用Apache POI将自定义数据写入excel文件。我正在使用POI 3.1.1版本jar。这是我的代码：
FileInputStream fis = new FileInputStream(sample);
workbook = new XSSFWorkbook(fis);
POIXMLProperties props = workbook.getProperties();
/* Let us set some core properties now*/
POIXMLProperties.CoreProperties coreProp = props.getCoreProperties();
coreProp.setCreator("Thinktibits"); //set document creator
coreProp.setDescription("set Metadata using Apache POI / Java");
coreProp.setCategory("Programming"); //category
/* Finally, we can set some custom Properies */
POIXMLProperties.CustomProperties custProp = props.getCustomProperties();
custProp.addProperty("Author", "Thinktibits");// String
custProp.addProperty("Year", 2014); // Number Property
custProp.addProperty("Published", true); //Yes No Property
custProp.addProperty("Typist", "tika");
FileOutputStream fos = new FileOutputStream(sample);
workbook.write(fos);
fos.close();
谁能帮助我在我的代码出问题的地方获得所需的自定义标签？