java poi 生成多个sheet
我的需求是:在一个表格中生成多个sheet,每个sheet的名称动态指定,每个sheet内的内容动态指定。生成的文件名动态指定。
工具类:
package test;
import java.io.OutputStream;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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;
public class ExportExcelUtils {
/**
* @Title: exportExcel
* @Description: 导出Excel的方法
* @author: evan @ 2014-01-09
* @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<List<String>> result,
OutputStream out) throws Exception {
// 生成一个表格
HSSFSheet sheet = workbook.createSheet();
workbook.setSheetName(sheetNum, sheetTitle,
HSSFWorkbook.ENCODING_UTF_16);
// 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.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.BLACK.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 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.setEncoding(HSSFCell.ENCODING_UTF_16);
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<String> m : result) {
row = sheet.createRow(index);
int cellIndex = 0;
for (String str : m) {
HSSFCell cell = row.createCell((short) cellIndex);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(str.toString());
cellIndex++;
}
index++;
}
}
}
}
测试数据:(再D盘下生成test.xls文件,并有多个sheet)
package test;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class PoiTest {
@SuppressWarnings("unchecked")
public static void main(String[] args) {
try {
OutputStream out = new FileOutputStream("D:\\test.xls");
List<List<String>> data = new ArrayList<List<String>>();
for (int i = 1; i < 5; i++) {
List rowData = new ArrayList();
rowData.add(String.valueOf(i));
rowData.add("东霖柏鸿");
data.add(rowData);
}
String[] headers = { "ID", "用户名" };
ExportExcelUtils eeu = new ExportExcelUtils();
HSSFWorkbook workbook = new HSSFWorkbook();
eeu.exportExcel(workbook, 0, "上海", headers, data, out);
eeu.exportExcel(workbook, 1, "深圳", headers, data, out);
eeu.exportExcel(workbook, 2, "广州", headers, data, 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();
}
}
}
如果你有同样的需求,你能看到这。你肯定能设计出你想要的报表格式了。
原文:https://blog.csdn.net/zl544434558/article/details/18034939