Poi使用SXSSFWorkbook方式导出Excel工具类

/**
*

• 功能描述：
• @Package: com.utils.excel.poiexcel
• @author: l
  */
  package com.utils.excel.poiexcel;

import java.io.IOException;
import java.util.List;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;

/**
*

• @ClassName: PoiSXSSFWorkbookExcel.java
• @Description: 导出Excel 采用SXSSFWorkbook实现方式 excel为07之后版本，只支持.xlsx格式
• @author: l

*/
public class PoiSXSSFWorkbookExcel {

/**
 * 导出到单个sheet页中
 * @param title
 *            标题
 * @param List<List<String>> result
 *            导出数据内容
 * @return wb
 *            SXSSFWorkbook对象
 * @throws IOException
 * 
 */

public static SXSSFWorkbook getSxssfwbExcel(String sheetTitle,String[] title, List<List<String>> result) {
	SXSSFWorkbook wb = new SXSSFWorkbook();
	//int sheetNum = 0;// 记录额外创建的sheet数量
	Sheet sheet = wb.createSheet(sheetTitle);
	// wb.setSheetName(sheetNum, sheetTitle+sheetNum);
	int rownum = 0;
	Row row = sheet.createRow(rownum);
	
	// 设置并获取到需要的样式
    XSSFCellStyle xssfCellStyleHeader = getAndSetXSSFCellStyleHeader(wb);
	
	Cell cell;
	// 创建标题,此时row=0,即第一行
	for (int j = 0; j < title.length; j++) {
		cell = row.createCell(j);
		cell.setCellValue(title[j]);
		cell.setCellStyle(xssfCellStyleHeader);
	}

	// 遍历集合数据，创建excel内容,产生数据行
	if (result != null) {
		int index = 1;
		List<String> m = null;
		for (int i = 0; i < result.size(); i++) {
			row = sheet.createRow(index);
			int cellIndex = 0;
			m = result.get(i);
			for (String str : m) {
				row.createCell((short) cellIndex).setCellValue(str);
				cellIndex++;
			}
			
			index++;
		}
	}
	
	
	return wb;
}



/**
 * 每个sheet页导出不同内容到多个sheet页中，每个sheet页表头内容不相同
 * 
 * @param wb
 *            SXSSFWorkbook对象
 * @param sheetNum
 *            sheet页
 * @param sheetTitle
 *            sheet页名称
 * @param title
 *            标题
 * @param List<List<String>> result
 *            导出数据内容
 * @return wb
 *            SXSSFWorkbook对象
 * @throws IOException
 * 
 */

public static SXSSFWorkbook getSxssfwbManyDiffSheets(SXSSFWorkbook wb, int sheetNum, String sheetTitle,
		String[] title, List<List<String>> result) {
	
	Sheet sheet = wb.createSheet();
	wb.setSheetName(sheetNum, sheetTitle);
	int rownum = 0;
	Row row = sheet.createRow(rownum);
	
	// 设置并获取到需要的样式
    XSSFCellStyle xssfCellStyleHeader = getAndSetXSSFCellStyleHeader(wb);
	
	Cell cell;
	// 创建标题,此时row=0,即第一行
	for (int j = 0; j < title.length; j++) {
		cell = row.createCell(j);
		cell.setCellValue(title[j]);
		cell.setCellStyle(xssfCellStyleHeader);
	}

	// 遍历集合数据，创建excel内容,产生数据行
	if (result != null) {
		int index = 1;
		List<String> m = null;
		for (int i = 0; i < result.size(); i++) {
			row = sheet.createRow(index);
			int cellIndex = 0;
			m = result.get(i);
			for (String str : m) {
				row.createCell((short) cellIndex).setCellValue(str);
				cellIndex++;
			}
			
			index++;
		}
	}
	
	
	return wb;
}




/**
 * 每个sheet页导出相同内容到多个sheet页中，每个sheet页表头内容相同
 * 每个sheet页目前总数设置为n,这里设置n=60000
 * @param title
 *            标题
 * @param List<List<String>> result
 *            导出数据内容
 * @return wb
 *            SXSSFWorkbook对象
 * @throws IOException
 * 
 */

public static SXSSFWorkbook getSxssfwbManySameSheets(String sheetTitle,String[] title, List<List<String>> result) {
	SXSSFWorkbook wb = new SXSSFWorkbook();
	int sheetNum = 0;// 记录额外创建的sheet数量
	Sheet sheet = wb.createSheet(sheetTitle + sheetNum);
	// wb.setSheetName(sheetNum, sheetTitle+sheetNum);
	int rownum = 0;
	Row row = sheet.createRow(rownum);
	
	// 设置并获取到需要的样式
    XSSFCellStyle xssfCellStyleHeader = getAndSetXSSFCellStyleHeader(wb);
	
	Cell cell;
	// 创建标题,此时row=0,即第一行
	for (int j = 0; j < title.length; j++) {
		cell = row.createCell(j);
		cell.setCellValue(title[j]);
		cell.setCellStyle(xssfCellStyleHeader);
	}

	// 遍历集合数据，创建excel内容,产生数据行
	if (result != null) {
		List<String> m = null;
		for (int i = 0; i < result.size(); i++) {
			if ((i + 1) % 60000 == 0) {
				sheetNum++;
				sheet = wb.createSheet(sheetTitle + sheetNum);
				row = sheet.createRow(0);
				// 声明列对象，参数为列索引，可以是0～255之间的任何一个
				// 创建标题,此时row=0,即第一行
				for (int j = 0; j < title.length; j++) {
					cell = row.createCell(j);
					cell.setCellValue(title[j]);
					cell.setCellStyle(xssfCellStyleHeader);
				}
			}
			row = sheet.createRow((i + 1) - (sheetNum * 60000)+sheetNum);
			int cellIndex = 0;
			m = result.get(i);
			for (String str : m) {
				row.createCell((short) cellIndex).setCellValue(str);
				cellIndex++;
			}
		}
	}
	
	
	return wb;
}


/**
 * 获取并设置header样式
 */
private static XSSFCellStyle getAndSetXSSFCellStyleHeader(SXSSFWorkbook sxssfWorkbook) {
    XSSFCellStyle xssfCellStyle = (XSSFCellStyle) sxssfWorkbook.createCellStyle();
    Font font = sxssfWorkbook.createFont();
    // 字体大小
    font.setFontHeightInPoints((short) 14);
    // 字体粗细
    font.setBoldweight((short) 20);
    font.setFontName("楷体");
    // 将字体应用到样式上面
    xssfCellStyle.setFont(font);
    // 是否自动换行
    xssfCellStyle.setWrapText(false);
    // 水平居中
    xssfCellStyle.setAlignment(HorizontalAlignment.CENTER);
    // 垂直居中
    xssfCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
    return xssfCellStyle;
}

}

上边是工具类，调用如下：
Date dateBefore = new Date();
String[] title =null;
title = new String[]{"机构","姓名"};

// excel文件名 .xlsx .xls
String fileName = "业务清单" + System.currentTimeMillis() + ".xlsx";
// sheet页名称
String sheetName = "业务清单";
List<List> data1 = new ArrayList<List>();
// 内容列表 行、列
int size = list.size();
if (size > 0) {
for (int i = 0; i < size; i++) {
Business respDto = list.get(i);
List rowData = new ArrayList<>();
rowData.add(respDto.getComcname()); //归属机构
rowData.add(respDto.getname()); //姓名
data1.add(rowData);
}
}
SXSSFWorkbook wb = PoiSXSSFWorkbookExcel.getSxssfwbManySameSheets(sheetName,title, data1);
try {
ServletOutputStream output = response.getOutputStream();
wb.write(output);
output.flush();
Date dateAfter = new Date();
logger.info("共"+list.size()+"条数据,导出列表共执行"+(dateAfter.getTime()-dateBefore.getTime())+"ms");
output.close();
} catch (Exception e) {
logger.info("导出excel时报错："+e.getStackTrace());
}