POI导出Excel--合并单元格

package com.test.util;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import javax.servlet.http.HttpServletResponse;
import javax.swing.JOptionPane;

import org.apache.commons.collections.CollectionUtils;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.CellReference;

/**
* @author zhanghk
*/
public class ExcelUtil_Extend {
/**
* @param fileName 文件名称
* @param headers 表头
* @param dataset 数据集
* @param isSortDataSet 是否对数据排序
* @param response HttpServletResponse
* @param mergeBasis 合并基准列 可选
* @param mergeCells 要合并的列 可选
* @param sumCellsMap 要求和的列 可选
* @param timeCells 时间列 可选
* @throws IOException
*/
public static void exportExelMerge(String fileName,final String[] headers,List<String[]> dataset,boolean isSortDataSet,HttpServletResponse response, final Integer[] mergeBasis, final Integer[] mergeCells, final Integer[] sumCells, final Integer[] timeCells) throws IOException{
String title = "Sheet1";
response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(fileName, "utf-8"));

createExcelMerge(title,headers,dataset,isSortDataSet,response.getOutputStream(),mergeBasis,mergeCells,sumCells,timeCells);

response.setStatus(HttpServletResponse.SC_OK);
response.flushBuffer();
}

/**
* @param title 文件名称
* @param headers 表头
* @param dataset 数据集
* @param isSortDataSet 是否对数据排序
* @param out OutputStream
* @param mergeBasis 合并基准列 可选
* @param mergeCells 要合并的列
* @param sumCells 要求和的列
* @param timeCells 时间列 可选
*/
public static void createExcelMerge(String title, final String[] headers,List<String[]> dataset,boolean isSortDataSet, OutputStream out, final Integer[] mergeBasis, final Integer[] mergeCells, final Integer[] sumCells, final Integer[] timeCells){
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet(title);

sheet.setDefaultColumnWidth(15); // 设置表格默认列宽度为15个字节

HSSFCellStyle headStyle = createHeadStyle(workbook); // 生成头部样式
HSSFCellStyle commonDataStyle = createCommonDataStyle(workbook); // 生成一般数据样式
HSSFCellStyle numStyle = createNumStyle(workbook); //生成数字类型保留两位小数样式
HSSFCellStyle sumRowStyle = createSumRowStyle(workbook); //生成合计行样式

if(headers == null || headers.length <= 0){
return;
}

HSSFRow row = sheet.createRow(0); // 产生表格标题行
for (int i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(headStyle);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}

if(isSortDataSet && mergeBasis != null && mergeBasis.length > 0){ //是否排序数据
Collections.sort(dataset, new Comparator<String[]>() {
public int compare(String[] o1, String[] o2) {
String s1 = "";
String s2 = "";
for(int i = 0 ; i < mergeBasis.length ; i++){
s1+=(o1[mergeBasis[i].intValue()]+Character.valueOf((char)127).toString());
s2+=(o2[mergeBasis[i].intValue()]+Character.valueOf((char)127).toString());
}
if(timeCells != null && timeCells.length > 0){
for(int i = 0 ; i < timeCells.length ; i++){
s1+= o1[timeCells[i].intValue()];
s2+= o2[timeCells[i].intValue()];
}
}
if(s1.compareTo(s2) < 0){
return -1;
}else if(s1.compareTo(s2) == 0){
return 0;
}else{
return 1;
}
}
});
}
// 遍历集合数据，产生数据行
Iterator<String[]> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
String[] dataSources = it.next() ;
for (int i = 0; i < dataSources.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(commonDataStyle);
cell.setCellValue(dataSources[i]);
}
}
try {
if(mergeBasis != null && mergeBasis.length > 0 && mergeCells != null && mergeCells.length > 0){
for(int i = 0 ; i < mergeCells.length ; i++){
mergedRegion(sheet,mergeCells[i],1,sheet.getLastRowNum(),workbook,mergeBasis);
}
}
if(sumCells != null && sumCells.length > 0){
createSumRow(sheet, row, headers, sumCells, sumRowStyle, numStyle);
}
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

/**
* 创建合计行
* @param sheet
* @param row
* @param headers
* @param sumCells
* @param sumRowStyle
* @param numStyle
*/
private static void createSumRow(HSSFSheet sheet , HSSFRow row , final String[] headers, final Integer[] sumCells , HSSFCellStyle sumRowStyle,HSSFCellStyle numStyle){
row=sheet.createRow(sheet.getLastRowNum()+1);
for (int i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(sumRowStyle);
}
for(int i = 1 ; i < sheet.getLastRowNum() ; i++){
for(int j = 0 ; j < sumCells.length ; j++){
sheet.getRow(i).getCell(sumCells[j]).setCellValue(Double.parseDouble(sheet.getRow(i).getCell(sumCells[j]).getStringCellValue()));
sheet.getRow(i).getCell(sumCells[j]).setCellStyle(numStyle);
}
}
HSSFCell sumCell = row.getCell(0);
sumCell.setCellValue("合计：");
String sumFunctionStr = null;
for(int i = 0 ; i < sumCells.length ; i++){
sumFunctionStr = "SUM("+CellReference.convertNumToColString(sumCells[i])+"2:"+CellReference.convertNumToColString(sumCells[i])+sheet.getLastRowNum()+")";
row.getCell(sumCells[i]).setCellFormula(sumFunctionStr);
}
}

4000
/**
* 合并单元格
* @param sheet
* @param cellLine
* @param startRow
* @param endRow
* @param workbook
* @param mergeBasis
*/
private static void mergedRegion(HSSFSheet sheet, int cellLine,int startRow, int endRow, HSSFWorkbook workbook, Integer[] mergeBasis) {
HSSFCellStyle style = workbook.createCellStyle();           // 样式对象
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  // 垂直
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);             // 水平
String s_will = sheet.getRow(startRow).getCell(cellLine).getStringCellValue();  // 获取第一行的数据,以便后面进行比较
int count = 0;
Set<Integer> set = new HashSet<Integer>();
CollectionUtils.addAll(set, mergeBasis);
for (int i = 2; i <= endRow; i++) {
String s_current = sheet.getRow(i).getCell(cellLine).getStringCellValue();
if (s_will.equals(s_current)) {
boolean isMerge = true;
if(!set.contains(cellLine)){//如果不是作为基准列的列 需要所有基准列都相同
for(int j = 0 ; j < mergeBasis.length ; j++){
if(!sheet.getRow(i).getCell(mergeBasis[j]).getStringCellValue()
.equals(sheet.getRow(i-1).getCell(mergeBasis[j]).getStringCellValue())){
isMerge = false;
}
}
}else{//如果作为基准列的列 只需要比较列号比本列号小的列相同
for(int j = 0 ; j < mergeBasis.length && mergeBasis[j] < cellLine ; j++){
if(!sheet.getRow(i).getCell(mergeBasis[j]).getStringCellValue()
.equals(sheet.getRow(i-1).getCell(mergeBasis[j]).getStringCellValue())){
isMerge = false;
}
}
}
if(isMerge){
count++;
}else{
sheet.addMergedRegion(new CellRangeAddress( startRow, startRow+count,cellLine , cellLine));
startRow = i;
s_will = s_current;
count = 0;
}
} else {
sheet.addMergedRegion(new CellRangeAddress( startRow, startRow+count,cellLine , cellLine));
startRow = i;
s_will = s_current;
count = 0;
}
if (i == endRow && count > 0) {
sheet.addMergedRegion(new CellRangeAddress(startRow,startRow+count ,cellLine , cellLine));
}
}
}

/**
* 标题单元格样式
* @param workbook
* @return
*/
private static HSSFCellStyle createHeadStyle(HSSFWorkbook workbook){
//标题单元格样式
HSSFCellStyle headStyle = workbook.createCellStyle();
headStyle.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
headStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
headStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
headStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
headStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
headStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
headStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//标题单元格字体
HSSFFont headFont = workbook.createFont();
headFont.setColor(HSSFColor.VIOLET.index);
headFont.setFontHeightInPoints((short) 12);
headFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
headStyle.setFont(headFont);
return headStyle;
}

/**
* 合计行单元格样式
* @param workbook
* @return
*/
private static HSSFCellStyle createSumRowStyle(HSSFWorkbook workbook){
//合计行单元格样式
HSSFCellStyle sumRowStyle = workbook.createCellStyle();
sumRowStyle.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
sumRowStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
sumRowStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
sumRowStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
sumRowStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
sumRowStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
sumRowStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
sumRowStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("#,##0.00"));
//合计行单元格字体
HSSFFont sumRowFont = workbook.createFont();
sumRowFont.setColor(HSSFColor.VIOLET.index);
sumRowFont.setFontHeightInPoints((short) 12);
sumRowFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
sumRowStyle.setFont(sumRowFont);
return sumRowStyle;
}

/**
* 普通数据单元格样式
* @param workbook
* @return
*/
private static HSSFCellStyle createCommonDataStyle(HSSFWorkbook workbook){
//普通数据单元格样式
HSSFCellStyle commonDataStyle = workbook.createCellStyle();
commonDataStyle.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
commonDataStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
commonDataStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
commonDataStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
commonDataStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
commonDataStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
commonDataStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
commonDataStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
//普通数据单元格字体
HSSFFont commonDataFont = workbook.createFont();
commonDataFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
//把字体应用到当前的样式
commonDataStyle.setFont(commonDataFont);
return commonDataStyle;
}

/**
* 自定义保留两位小数数字单元格格式
* @param workbook
* @return
*/
private static HSSFCellStyle createNumStyle(HSSFWorkbook workbook){
//自定义保留两位小数数字单元格格式
HSSFCellStyle numStyle = workbook.createCellStyle();
numStyle.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
numStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
numStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
numStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
numStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
numStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
numStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
numStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
numStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("#,##0.00"));
//自定义保留两位小数数字单元格字体
HSSFFont numFont = workbook.createFont();
numFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
//把字体应用到当前的样式
numStyle.setFont(numFont);
return numStyle;
}

public static void main(String[] args) {
String[] headers =  { "大区", "部门", "金额", "数量", "日期" };
List<String[]> dataset = new ArrayList<String[]>();
dataset.add(new String[] {"华东", "部门3", "35", "1", "2015-01-01"});
dataset.add(new String[] {"华北", "部门1", "20", "1", "2015-01-02"});
dataset.add(new String[] {"华北", "部门2", "25", "1", "2015-01-03"});
dataset.add(new String[] {"华北", "部门5", "25", "1", "2015-01-04"});
dataset.add(new String[] {"华南", "部门1", "15", "1", "2015-01-05"});
dataset.add(new String[] {"华北", "部门3", "30", "1", "2015-01-06"});
dataset.add(new String[] {"华北", "部门3", "30", "1", "2015-01-07"});
dataset.add(new String[] {"华东", "部门1", "25", "1", "2015-01-08"});
dataset.add(new String[] {"华南", "部门4", "30", "1", "2015-01-09"});
dataset.add(new String[] {"华东", "部门2", "25", "1", "2015-01-10"});
dataset.add(new String[] {"华东", "部门2", "25", "1", "2015-01-11"});
dataset.add(new String[] {"华东", "部门3", "35", "1", "2015-01-12"});
dataset.add(new String[] {"华南", "部门1", "15", "1", "2015-01-13"});
dataset.add(new String[] {"华北", "部门6", "20", "1", "2015-01-14"});
dataset.add(new String[] {"华南", "部门2", "25", "1", "2015-01-15"});
dataset.add(new String[] {"华南", "部门2", "25", "1", "2015-01-16"});
dataset.add(new String[] {"华东", "部门1", "25", "1", "2015-01-17"});
dataset.add(new String[] {"华南", "部门8", "30", "1", "2015-01-18"});
dataset.add(new String[] {"华东", "部门2", "35", "1", "2015-01-01"});
dataset.add(new String[] {"华北", "部门1", "20", "1", "2015-01-02"});
dataset.add(new String[] {"华北", "部门11", "25", "1", "2015-01-03"});
dataset.add(new String[] {"华北", "部门2", "25", "1", "2015-01-04"});
dataset.add(new String[] {"华南", "部门1", "15", "1", "2015-01-05"});
dataset.add(new String[] {"华北", "部门4", "30", "1", "2015-01-06"});
dataset.add(new String[] {"华北", "部门3", "30", "1", "2015-01-07"});
dataset.add(new String[] {"华东", "部门9", "25", "1", "2015-01-08"});
dataset.add(new String[] {"华南", "部门3", "30", "1", "2015-01-09"});
dataset.add(new String[] {"华东", "部门12", "25", "1", "2015-01-10"});
dataset.add(new String[] {"华东", "部门2", "25", "1", "2015-01-11"});
dataset.add(new String[] {"华东", "部门12", "35", "1", "2015-01-12"});
dataset.add(new String[] {"华南", "部门1", "15", "1", "2015-01-13"});
dataset.add(new String[] {"华北", "部门11", "20", "1", "2015-01-14"});
dataset.add(new String[] {"华南", "部门21", "25", "1", "2015-01-15"});
dataset.add(new String[] {"华南", "部门2", "25", "1", "2015-01-16"});
dataset.add(new String[] {"华东", "部门15", "25", "1", "2015-01-17"});
dataset.add(new String[] {"华南", "部门3", "30", "1", "2015-01-18"});
dataset.add(new String[] {"华东", "部门3", "35", "1", "2015-01-01"});
dataset.add(new String[] {"华北", "部门17", "20", "1", "2015-01-02"});
dataset.add(new String[] {"华北", "部门22", "25", "1", "2015-01-03"});
dataset.add(new String[] {"华北", "部门2", "25", "1", "2015-01-04"});
dataset.add(new String[] {"华南", "部门1", "15", "1", "2015-01-05"});
dataset.add(new String[] {"华北", "部门2", "30", "1", "2015-01-06"});
dataset.add(new String[] {"华北", "部门3", "30", "1", "2015-01-07"});
dataset.add(new String[] {"华东", "部门1", "25", "1", "2015-01-08"});
dataset.add(new String[] {"华南", "部门8", "30", "1", "2015-01-09"});
dataset.add(new String[] {"华东", "部门2", "25", "1", "2015-01-10"});
dataset.add(new String[] {"华东", "部门2", "25", "1", "2015-01-11"});
dataset.add(new String[] {"华东", "部门3", "35", "1", "2015-01-12"});
dataset.add(new String[] {"华南", "部门7", "15", "1", "2015-01-13"});
dataset.add(new String[] {"华北", "部门1", "20", "1", "2015-01-14"});
dataset.add(new String[] {"华南", "部门2", "25", "1", "2015-01-15"});
dataset.add(new String[] {"华南", "部门2", "25", "1", "2015-01-16"});
dataset.add(new String[] {"华东", "部门9", "25", "1", "2015-01-17"});
dataset.add(new String[] {"华南", "部门3", "30", "1", "2015-01-18"});
try {
OutputStream out = new FileOutputStream("E://a.xls");
ExcelUtil_Extend.createExcelMerge("测试.xls", headers, dataset, true, out, new Integer[]{0,1}, new Integer[]{0,1}, new Integer[]{2,3}, new Integer[]{4});
out.close();
JOptionPane.showMessageDialog(null, "导出成功!");
System.out.println("excel导出成功！");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}