实现Converter<T> 接口
重写下面几个方法：
public class SettlementConverter implements Converter<Integer> {@Overridepublic Class supportJavaTypeKey() {return null;}@Overridepublic CellDataTypeEnum supportExcelTypeKey() {return null;}@Overridepublic Integer convertToJavaData(CellData cellData, ExcelContentProperty excelContentProperty, GlobalConfiguration globalConfiguration) throws Exception {return null;}@Overridepublic CellData convertToExcelData(Integer integer, ExcelContentProperty excelContentProperty, GlobalConfiguration globalConfiguration) throws Exception {return null;}}
在convertToExcelData()方法里面写将数据库字段转换成EXCEL显示字段的逻辑，如：
@Overridepublic CellData convertToExcelData(Integer integer, ExcelContentProperty excelContentProperty, GlobalConfiguration globalConfiguration) throws Exception {if(integer == 1){return new CellData("男");}else {return new CellData("女");}}
然后在实体类上使用：
@ExcelProperty(value = "性别",converter = GenderConverter.class)
