poi 设置样式工具类

感觉poi工具类项目不能很好使用,简单封装了几个样式设置的工具类。里面有个引入涉及项目,****代替

import cn.hutool.poi.excel.ExcelUtil;
import cn.hutool.poi.excel.ExcelWriter;
import cn.hutool.poi.excel.style.StyleUtil;
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import org.apache.poi.hssf.usermodel.DVConstraint;
import org.apache.poi.hssf.usermodel.HSSFDataValidation;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.DataValidation;
import org.apache.poi.ss.usermodel.DataValidationConstraint;
import org.apache.poi.ss.usermodel.DataValidationHelper;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.xssf.usermodel.XSSFDataValidation;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

/***
 * POI扩展工具类,可指定sheet页写入数据
 */
public class ExcelHelper {

   /**
    * 初始化excel写入器,初始化完成后写入器只包含一个指定名称的sheet
    *
    * @param sheetName sheet名称
    * @return
    */
   public static ExcelWriter initExcelWriter(String sheetName) {
      ExcelWriter writer = ExcelUtil.getWriter();
      writer.getWorkbook().setSheetName(0, sheetName);
      return writer;
   }

   /**
    * 初始化excel写入器,初始化完成后写入器只包含一个指定名称的sheet
    *
    * @param sheetName sheet名称
    * @return
    */
   public static ExcelWriter initExcel2007Writer(String sheetName) {
      XSSFWorkbook xssfWorkbook = new XSSFWorkbook();
      ExcelWriter writer = new ExcelWriter(xssfWorkbook, sheetName);
      return writer;
   }

   /**
    * 设置excel写入器当前sheet的列宽
    *
    * @param columnCount 指定列数,从第一列开始算起
    * @param width       宽度
    */
   public static void setColumnWidth(ExcelWriter excelWriter, int columnCount, int width) {
      for(int i = 0; i < columnCount; i++) {
         excelWriter.setColumnWidth(i, width);
      }
   }

   /**
    * 指定的行和列添加下拉列表,并保护数据的有效性
    *
    * @param sheet        写入器对象的sheet页
    * @param dropDownText 下拉列表的内容选项
    * @param firstRow     开始行,行号下标从0开始,从第1行开始时不包含标题
    * @param lastRow      结束行
    * @param firstCol     开始列,列号下标从0开始
    * @param lastCol      结束列
    */
   public static void setDropDownText(Sheet sheet, String[] dropDownText, int firstRow, int lastRow, int firstCol,
                                      int lastCol)
   {
      set2007DropDownText(sheet, dropDownText, firstRow, lastRow, firstCol, lastCol);
   }

   /**
    * 适用于2003 和 2007 使用隐藏域设置长文本下拉框
    * 

* 需要在数据写完后再做下拉处理 */ public static void set0307DropDownLongText(Sheet sheet, String[] dropDownText, int firstRow, int lastRow, int firstCol, int lastCol) { //创建一个隐藏域sheet,将下拉的值写入隐藏的sheet Workbook workbook = sheet.getWorkbook(); String sheetName = "hidden" + workbook.getNumberOfSheets(); Sheet hiddenSheet = workbook.createSheet(sheetName); for(int i = 0, length = dropDownText.length; i < length; i++) { hiddenSheet.createRow(i).createCell(0).setCellValue(dropDownText[i]); } int sheetIndex = workbook.getSheetIndex(sheetName); workbook.setSheetHidden(sheetIndex, Boolean.TRUE); //设置下拉的区域值 String strFormula = sheetName + "!$A$1:$A$" + dropDownText.length; DataValidationHelper helper = sheet.getDataValidationHelper(); DataValidationConstraint formulaListConstraint = helper.createFormulaListConstraint(strFormula); CellRangeAddressList regions = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol); DataValidation validation = helper.createValidation(formulaListConstraint, regions); //强制选择下拉内容,兼容处理 if(validation instanceof XSSFDataValidation) { validation.setSuppressDropDownArrow(true); validation.createErrorBox("输入错误", "请从下拉列表中取值"); validation.setShowErrorBox(true); } else { validation.setSuppressDropDownArrow(false); } sheet.addValidationData(validation); } /** * 设置2007版excel下拉框,并设置下拉选择为强制项 * * @param sheet sheet页 * @param dropDownText 下拉内容 * @param firstRow 区域第一行 * @param lastRow 下拉区域最后一行 * @param firstCol 下拉区域第一列 * @param lastCol 下拉区域最后一列 */ public static void set2007DropDownText(Sheet sheet, String[] dropDownText, int firstRow, int lastRow, int firstCol, int lastCol) { DataValidationHelper helper = sheet.getDataValidationHelper(); // 设置数据有效性加载在哪个单元格上,四个参数分别是:起始行、终止行、起始列、终止列 CellRangeAddressList regions = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol); // 数据有效性对象 XSSFDataValidation dstDataValidation = (XSSFDataValidation) helper.createValidation(helper.createExplicitListConstraint(dropDownText), regions); //强制从下拉框中选择内容 dstDataValidation.createErrorBox("输入错误", "请从下拉列表中取值"); dstDataValidation.setShowErrorBox(true); sheet.addValidationData(dstDataValidation); } /** * 给excel写入器sheet1中,指定单元格添加提示信息(非下拉) * * @param sheet 写入器的sheet页 * @param promptTitle 弹出的提示信息标题 * @param promptMsg 弹出的提示信息内容 * @param firstRow 开始行,行号下标从0开始,从第1行开始时不包含标题 * @param lastRow 结束行 * @param firstCol 开始列,列号下标从0开始 * @param lastCol 结束列 */ public static void setCellsPromptMsg(Sheet sheet, String promptTitle, String promptMsg, int firstRow, int lastRow, int firstCol, int lastCol) { // 构造constraint对象,BB1没有约束就相当于创建了一个没有约束的单元格 DVConstraint constraint = DVConstraint.createCustomFormulaConstraint("BB1"); // 四个参数分别是:起始行、终止行、起始列、终止列 CellRangeAddressList regions = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol); // 数据有效性对象 HSSFDataValidation data_validation_view = new HSSFDataValidation(regions, constraint); data_validation_view.createPromptBox(promptTitle, promptMsg); sheet.addValidationData(data_validation_view); } /** * 创建新的sheet页,并将切换到第一行 * 创建或切换完后将写入器的行数切换的第一行 * 设置标题列 * * @param excelWriter 写入器 * @param columnCount 从第一列开始一共多少列需要设置 * @param width 需要设置的宽度 * @param sheetName 新建的sheetname */ public static void createSheet(ExcelWriter excelWriter, int columnCount, int width, String sheetName) { excelWriter.setOrCreateSheet(sheetName); excelWriter.resetRow(); ExcelHelper.setColumnWidth(excelWriter, columnCount, width); } /** * 创建或切换sheet页 * 创建时使用默认格式 * 切换时使用切换的目标sheet格式 * * @param excelWriter * @param sheetName */ public static void createOrSetSheet(ExcelWriter excelWriter, String sheetName) { excelWriter.setOrCreateSheet(sheetName); excelWriter.resetRow(); } /** * 写保护某列数据 * * @param sheet sheet页 * @param columnIndex 列下标,从0开始 */ public static void protectSheetColumn(Sheet sheet, int startRowIndex, int endRowIndex, int columnIndex) { Workbook workbook = sheet.getWorkbook(); CellStyle cellStyle = workbook.createCellStyle(); cellStyle.setLocked(Boolean.TRUE); setCellFormat(sheet, startRowIndex, endRowIndex, columnIndex, cellStyle); } /** * 设置某列单元格的自定义格式 * * @param sheet * @param startRowIndex 开始行 * @param endRowIndex 结束行 * @param columnIndex 列数 * @param format 单元格自定义格式的表达公式 */ public static void setCellDefinedFormat(Sheet sheet, int startRowIndex, int endRowIndex, int columnIndex, String format) { Workbook workbook = sheet.getWorkbook(); CellStyle cellStyle = StyleUtil.createDefaultCellStyle(workbook); cellStyle.setDataFormat(workbook.createDataFormat().getFormat(format)); setCellFormat(sheet, startRowIndex, endRowIndex, columnIndex, cellStyle); } /** * 设置单元格格式 * * @param sheet * @param startRowIndex * @param endRowIndex * @param columnIndex * @param cellStyle */ private static void setCellFormat(Sheet sheet, int startRowIndex, int endRowIndex, int columnIndex, CellStyle cellStyle) { for(int i = startRowIndex; i <= endRowIndex; i++) { Row row = sheet.getRow(i); if(Tool.isNullOrEmpty(row)) { return; } Cell cell = row.getCell(columnIndex); if(Tool.isNullOrEmpty(cell)) { return; } cell.setCellStyle(cellStyle); } }

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