POI依据类型设置导出格式

 //设置Bigdecimal数据导出时以数值形式输出
 CellStyle decimalStyle = workbook.createCellStyle();
 DataFormat decimalDf = workbook.createDataFormat();
 decimalStyle.setDataFormat(decimalDf.getFormat("0.00"));
 decimalStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
 decimalStyle.setAlignment(CellStyle.ALIGN_LEFT);
 //设置Date数据导出时以日期形式输出
 CellStyle dateStyle = workbook.createCellStyle();
 DataFormat dateDf = workbook.createDataFormat();
 dateStyle.setDataFormat(dateDf.getFormat("yyyy/MM/dd"));
 dateStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
 dateStyle.setAlignment(CellStyle.ALIGN_LEFT);
 //设置字符串导出时以文本形式输出
 CellStyle textStyle = workbook.createCellStyle();
 DataFormat textDf = workbook.createDataFormat();
 textStyle.setDataFormat(textDf.getFormat("@"));
 textStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
 textStyle.setAlignment(CellStyle.ALIGN_LEFT);