导出excel表格util

import lombok.extern.slf4j.Slf4j;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;

/**
* @author kk
* @version 1.0
* @date 2018/8/25 09:25
* @description 导出excel文件工具类
*/
@Slf4j
public class ExcelUtils {

/**
* 导出excel
*
* @param sheetName sheet名称
* @param title 标题
* @param values 内容
* @param wb HSSWorkbook对象
* @return HSSFWorkbook对象
*/
public static void getHSSWorkbook(HttpServletResponse response,String sheetName,String fileName,
String[] title, String[][] values, HSSFWorkbook wb) {
//创建一个HSSWorkbook,对应一个Excel文件
if (wb == null) {
wb = new HSSFWorkbook();
}
//在workbook中添加一个sheet，对应Excel中的sheet
HSSFSheet sheet = wb.createSheet(sheetName);
//在sheet中添加表头第0行，注意老版本POI对Excel的行数列数有限制
HSSFRow row = sheet.createRow(0);
//创建单元格，并设置值表头，设置表头居中
HSSFCellStyle cellStyle = wb.createCellStyle();
//创建居中格式
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//声明列对象
HSSFCell cell = null;

//起始行号，终止行号，其实列号，终止列号
sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, title.length - 1));
cell = row.createCell(1);
cell.setCellValue("图文统计详细数据111111");
cell.setCellStyle(cellStyle);

//创建标题
for (int i = 0; i < title.length; i++) {
cell = row.createCell(i);
cell.setCellValue(title[i]);
cell.setCellStyle(cellStyle);
sheet.setColumnWidth(i, 3766);
}

//创建内容
for (int i = 0; i < values.length; i++) {
row = sheet.createRow(i + 1);
for (int j = 0; j < values[i].length; j++) {
//将内容按顺序赋给对应的列对象
HSSFCell hCell = row.createCell(j);
hCell.setCellValue(values[i][j]);
hCell.setCellStyle(cellStyle);
}
}
setResponseHeader(response,wb,fileName);
}

/**
* 列头单元格样式
*/
private static HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {

// 设置字体
HSSFFont font = workbook.createFont();
//设置字体大小
font.setFontHeightInPoints((short) 11);
//字体加粗
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//设置字体名字
font.setFontName("Courier New");
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//设置底边框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//设置底边框颜色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//设置左边框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//设置左边框颜色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//设置右边框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//设置右边框颜色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//设置顶边框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//设置顶边框颜色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在样式用应用设置的字体;
style.setFont(font);
//设置自动换行;
style.setWrapText(false);
//设置水平对齐的样式为居中对齐;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//设置垂直对齐的样式为居中对齐;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

return style;

}

/**
* 列数据信息单元格样式
*/
private static HSSFCellStyle getStyle(HSSFWorkbook workbook) {
// 设置字体
HSSFFont font = workbook.createFont();
//设置字体大小
//font.setFontHeightInPoints((short)10);
//字体加粗
//font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//设置字体名字
font.setFontName("Courier New");
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//设置底边框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//设置底边框颜色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//设置左边框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//设置左边框颜色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//设置右边框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//设置右边框颜色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//设置顶边框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//设置顶边框颜色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在样式用应用设置的字体;
style.setFont(font);
//设置自动换行;
style.setWrapText(false);
//设置水平对齐的样式为居中对齐;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//设置垂直对齐的样式为居中对齐;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

return style;

}

/**
* 生成excel表格带标题
* @param response 响应
* @param sheetName sheet名称
* @param fileName 文件名称
* @param title 标题
* @param rowName
* @param dataList
*/
public static void getHSSWorkbookAndTitle(HttpServletResponse response,String sheetName,String fileName,
String title,String[] rowName, List<Object[]> dataList) {
//创建一个HSSWorkbook,对应一个Excel文件
// 创建工作簿对象
HSSFWorkbook wb = new HSSFWorkbook();
// 创建工作表
HSSFSheet sheet = wb.createSheet(sheetName);
// 产生表格标题行
HSSFRow rowm = sheet.createRow(0);
HSSFCell cellTiltle = rowm.createCell(0);

//sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面 - 可扩展】
//获取列头样式对象
HSSFCellStyle columnTopStyle = getColumnTopStyle(wb);
//单元格样式对象
HSSFCellStyle style = getStyle(wb);

sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length - 1)));
cellTiltle.setCellStyle(columnTopStyle);
cellTiltle.setCellValue(title);

// 定义所需列数
int columnNum = rowName.length;
// 在索引2的位置创建行(最顶端的行开始的第二行)
HSSFRow rowRowName = sheet.createRow(2);

// 将列头设置到sheet的单元格中
for (int n = 0; n < columnNum; n++) {
//创建列头对应个数的单元格
HSSFCell cellRowName = rowRowName.createCell(n);
//设置列头单元格的数据类型
cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING);
HSSFRichTextString text = new HSSFRichTextString(rowName[n]);
//设置列头单元格的值
cellRowName.setCellValue(text);
//设置列头单元格样式
cellRowName.setCellStyle(columnTopStyle);
}

//将查询出的数据设置到sheet对应的单元格中
for (int i = 0; i < dataList.size(); i++) {
//遍历每个对象
Object[] obj = dataList.get(i);
//创建所需的行数
HSSFRow row = sheet.createRow(i + 3);

for (int j = 0; j < obj.length; j++) {
//设置单元格的数据类型
HSSFCell cell = null;
cell = row.createCell(j, HSSFCell.CELL_TYPE_STRING);
if (!"".equals(obj[j]) && obj[j] != null) {
//设置单元格的值
cell.setCellValue(obj[j].toString());
}
//设置单元格样式
cell.setCellStyle(style);
}
}
//让列宽随着导出的列长自动适应
for (int colNum = 0; colNum < columnNum; colNum++) {
int columnWidth = sheet.getColumnWidth(colNum) / 256;
for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {
HSSFRow currentRow;
//当前行未被使用过
if (sheet.getRow(rowNum) == null) {
currentRow = sheet.createRow(rowNum);
} else {
currentRow = sheet.getRow(rowNum);
}
if (currentRow.getCell(colNum) != null) {
HSSFCell currentCell = currentRow.getCell(colNum);
if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
int length = currentCell.getStringCellValue().getBytes().length;
if (columnWidth < length) {
columnWidth = length;
}
}
}
}
if (colNum == 0) {
sheet.setColumnWidth(colNum, (columnWidth + 4) * 256 );
} else {
sheet.setColumnWidth(colNum, (columnWidth + 4) * 256);
}
}
setResponseHeader(response,wb,fileName);
}

/**
* 响应到客户端
*
* @param response 响应
* @param fileName 文件名称
*/
private static void setResponseHeader(HttpServletResponse response, HSSFWorkbook hssWorkbook, String fileName) {
//响应到客户端
try {
fileName = new String(fileName.getBytes(), "ISO8859-1");
response.setContentType("application/octet-stream;charset=ISO8859-1");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
response.addHeader("Param", "no-cache");
response.addHeader("Cache-Control", "no-cache");
OutputStream outputStream = response.getOutputStream();
hssWorkbook.write(outputStream);
outputStream.flush();
outputStream.close();
} catch (IOException e) {
log.info("响应到客户端出错：" + e.getMessage());
}
}

}

 

注：需要引入依赖

<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.6</version>
</dependency>