java导出excel生成多个sheet

try {
OutputStream out = new FileOutputStream(“E:\test.xls”);//导出本地
//OutputStream out = response.getOutputStream();//输出客户端
List data1 = new ArrayList();
List data2 = new ArrayList();
List data3 = new ArrayList();
for (int i = 1; i < 5; i++) {
List rowData = new ArrayList();
rowData.add(String.valueOf(i));
rowData.add(“上海东霖柏鸿”);
data1.add(rowData);
}
for (int i = 1; i < 5; i++) {
List rowData = new ArrayList();
rowData.add(String.valueOf(i));
rowData.add(“深圳东霖柏鸿”);
data2.add(rowData);
}
for (int i = 1; i < 5; i++) {
List rowData = new ArrayList();
rowData.add(String.valueOf(i));
rowData.add(“广州东霖柏鸿”);
data3.add(rowData);
}
String[] headers = { “ID”, “用户名” };
ExportExcelUtils eeu = new ExportExcelUtils();
HSSFWorkbook workbook = new HSSFWorkbook();
eeu.exportExcel(workbook, 0, “上海”, headers, data1, out);
eeu.exportExcel(workbook, 1, “深圳”, headers, data2, out);
eeu.exportExcel(workbook, 2, “广州”, headers, data3, out);
//原理就是将所有的数据一起写入,然后再关闭输入流。
workbook.write(out);
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}

public class ExportExcelUtils {

/**
 * @Title: exportExcel
 * @Description: 导出Excel的方法
 * @author: liuct @ 2019-01-29 
 * @param workbook 
 * @param sheetNum (sheet的位置,0表示第一个表格中的第一个sheet)
 * @param sheetTitle  (sheet的名称)
 * @param headers    (表格的标题)
 * @param result   (表格的数据)
 * @param out  (输出流)
 * @throws Exception
 */
public void exportExcel(HSSFWorkbook workbook, int sheetNum,
		String sheetTitle, String[] headers, List> result,
		OutputStream out) throws Exception {
	// 生成一个表格
	HSSFSheet sheet = workbook.createSheet();
	workbook.setSheetName(sheetNum, sheetTitle);
	// 设置表格默认列宽度为20个字节
	sheet.setDefaultColumnWidth((short) 20);
	// 生成一个样式
	HSSFCellStyle style = workbook.createCellStyle();
	// 设置这些样式
	style.setFillForegroundColor(HSSFColor.PALE_BLUE.index);

	style.setFillBackgroundColor(HSSFColor.WHITE.index);
	style.setFillForegroundColor(HSSFColor.LIGHT_ORANGE.index);

	// 生成一个字体
	HSSFFont font = workbook.createFont();
	font.setColor(HSSFColor.BLACK.index);
	font.setFontHeightInPoints((short) 12);
	// 把字体应用到当前的样式
	style.setFont(font);

	// 指定当单元格内容显示不下时自动换行
	style.setWrapText(true);

	// 产生表格标题行
	HSSFRow row = sheet.createRow(0);
	for (int i = 0; i < headers.length; i++) {
		HSSFCell cell = row.createCell((short) i);
	
		cell.setCellStyle(style);
		HSSFRichTextString text = new HSSFRichTextString(headers[i]);
		cell.setCellValue(text.toString());
	}
	// 遍历集合数据,产生数据行
	if (result != null) {
		int index = 1;
		for (List m : result) {
			row = sheet.createRow(index);
			int cellIndex = 0;
			for (String str : m) {
				HSSFCell cell = row.createCell((short) cellIndex);
				cell.setCellValue(str.toString());
				cellIndex++;
			}
			index++;
		}
	}
}

}

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