Java POI组件实现多个Excel文件整合成一个多Sheet的Excel文件
代码:
package com.weichai;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Iterator;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class Test {
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
// 将所有类型的尽调excel文件合并成一个excel文件
String Path = "D:\\ExcelTest";
File file = new File(Path);
File[] tempList = file.listFiles();
String TmpList [] = new String [2];
System.out.println("该目录下对象个数：" + tempList.length);
for (int i = 0; i < tempList.length; i++) {
if (tempList[i].isFile()) {
TmpList[i] = tempList[i].toString();
System.out.println("文件:"+TmpList[i]+" 待处理");
}
}
XSSFWorkbook newExcelCreat = new XSSFWorkbook();
for (String fromExcelName : TmpList) { // 遍历每个源excel文件，TmpList为源文件的名称集合
InputStream in = new FileInputStream(fromExcelName);
XSSFWorkbook fromExcel = new XSSFWorkbook(in);
int length = fromExcel.getNumberOfSheets();
if(length<=1){ //长度为1时
XSSFSheet oldSheet = fromExcel.getSheetAt(0);
XSSFSheet newSheet = newExcelCreat.createSheet(oldSheet.getSheetName());
copySheet(newExcelCreat, oldSheet, newSheet);
}else{
for (int i = 0; i < length; i++) {// 遍历每个sheet
XSSFSheet oldSheet = fromExcel.getSheetAt(i);
XSSFSheet newSheet = newExcelCreat.createSheet(oldSheet.getSheetName());
copySheet(newExcelCreat, oldSheet, newSheet);
}
}
}
String allFileName = Path+ "\\New.xlsx"; //定义新生成的xlx表格文件
FileOutputStream fileOut = new FileOutputStream(allFileName);
newExcelCreat.write(fileOut);
fileOut.flush();
fileOut.close();
// // 删除各个源文件
// for (String fromExcelName : TmpList) {// 遍历每个源excel文件
// File Existfile = new File(fromExcelName);
// if (Existfile.exists()) {
// Existfile.delete();
// }
// }
System.out.println("运行结束!");
}
public static void copyCellStyle(XSSFCellStyle fromStyle, XSSFCellStyle toStyle) {
toStyle.cloneStyleFrom(fromStyle);// 此一行代码搞定
// 下面统统不用
/*
* //对齐方式 toStyle.setAlignment(fromStyle.getAlignment()); //边框和边框颜色
* toStyle.setBorderBottom(fromStyle.getBorderBottom());
* toStyle.setBorderLeft(fromStyle.getBorderLeft());
* toStyle.setBorderRight(fromStyle.getBorderRight());
* toStyle.setBorderTop(fromStyle.getBorderTop());
* toStyle.setTopBorderColor(fromStyle.getTopBorderColor());
* toStyle.setBottomBorderColor(fromStyle.getBottomBorderColor());
* toStyle.setRightBorderColor(fromStyle.getRightBorderColor());
* toStyle.setLeftBorderColor(fromStyle.getLeftBorderColor()); //背景和前景
* //toStyle.setFillPattern(fromStyle.getFillPattern());
* //填充图案，不起作用，转为黑色
* toStyle.setFillBackgroundColor(fromStyle.getFillBackgroundColor());
* //不起作用
* toStyle.setFillForegroundColor(fromStyle.getFillForegroundColor());
* toStyle.setDataFormat(fromStyle.getDataFormat()); //数据格式
* //toStyle.setFont(fromStyle.getFont()); //不起作用
* toStyle.setHidden(fromStyle.getHidden());
* toStyle.setIndention(fromStyle.getIndention());//首行缩进
* toStyle.setLocked(fromStyle.getLocked());
* toStyle.setRotation(fromStyle.getRotation());//旋转
* toStyle.setVerticalAlignment(fromStyle.getVerticalAlignment());
* //垂直对齐 toStyle.setWrapText(fromStyle.getWrapText()); //文本换行
*/
}
/**
* 合并单元格
* @param fromSheet
* @param toSheet
*/
public static void mergeSheetAllRegion(XSSFSheet fromSheet, XSSFSheet toSheet) {
int num = fromSheet.getNumMergedRegions();
CellRangeAddress cellR = null;
for (int i = 0; i < num; i++) {
cellR = fromSheet.getMergedRegion(i);
toSheet.addMergedRegion(cellR);
}
}
/**
* 复制单元格
* @param wb
* @param fromCell
* @param toCell
*/
public static void copyCell(XSSFWorkbook wb, XSSFCell fromCell, XSSFCell toCell) {
XSSFCellStyle newstyle = wb.createCellStyle();
copyCellStyle(fromCell.getCellStyle(), newstyle);
// toCell.setEncoding(fromCell.getStringCelllValue());
// 样式
toCell.setCellStyle(newstyle);
if (fromCell.getCellComment() != null) {
toCell.setCellComment(fromCell.getCellComment());
}
// 不同数据类型处理
int fromCellType = fromCell.getCellType();
toCell.setCellType(fromCellType);
if (fromCellType == XSSFCell.CELL_TYPE_NUMERIC) {
if (XSSFDateUtil.isCellDateFormatted(fromCell)) {
toCell.setCellValue(fromCell.getDateCellValue());
} else {
toCell.setCellValue(fromCell.getNumericCellValue());
}
} else if (fromCellType == XSSFCell.CELL_TYPE_STRING) {
toCell.setCellValue(fromCell.getRichStringCellValue());
} else if (fromCellType == XSSFCell.CELL_TYPE_BLANK) {
// nothing21
} else if (fromCellType == XSSFCell.CELL_TYPE_BOOLEAN) {
toCell.setCellValue(fromCell.getBooleanCellValue());
} else if (fromCellType == XSSFCell.CELL_TYPE_ERROR) {
toCell.setCellErrorValue(fromCell.getErrorCellValue());
} else if (fromCellType == XSSFCell.CELL_TYPE_FORMULA) {
toCell.setCellFormula(fromCell.getCellFormula());
} else { // nothing29
}
}
/**
* 行复制功能
* @param wb
* @param oldRow
* @param toRow
*/
public static void copyRow(XSSFWorkbook wb, XSSFRow oldRow, XSSFRow toRow) {
toRow.setHeight(oldRow.getHeight());
for (Iterator cellIt = oldRow.cellIterator(); cellIt.hasNext();) {
XSSFCell tmpCell = (XSSFCell) cellIt.next();
XSSFCell newCell = toRow.createCell(tmpCell.getColumnIndex());
copyCell(wb, tmpCell, newCell);
}
}
/**
* Sheet复制
* @param wb
* @param fromSheet
* @param toSheet
*/
public static void copySheet(XSSFWorkbook wb, XSSFSheet fromSheet, XSSFSheet toSheet) {
mergeSheetAllRegion(fromSheet, toSheet);
// 设置列宽
int length = fromSheet.getRow(fromSheet.getFirstRowNum()).getLastCellNum();
for (int i = 0; i <= length; i++) {
toSheet.setColumnWidth(i, fromSheet.getColumnWidth(i));
}
for (Iterator rowIt = fromSheet.rowIterator(); rowIt.hasNext();) {
XSSFRow oldRow = (XSSFRow) rowIt.next();
XSSFRow newRow = toSheet.createRow(oldRow.getRowNum());
copyRow(wb, oldRow, newRow);
}
}
public class XSSFDateUtil extends DateUtil {
}
}
运行截图:
将Student1和Student2的数据整合到一个Excel表单中
生成的New.xlsx文件如下图所示:
