apache poi 单sheet导出
注意 poi单sheet 行数限制6W+ 具体不清楚了
数据较多建议多sheet 大量数据建议改成cvs文件
再多的话可以考虑easycode
话不多说 直接上代码
首先pom文件 引入jar包
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.9</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>
//spring 注入
@Resource
private ExcelExportUtil excelExportUtil;
@RequestMapping(value = "/administrativePenaltyExport")
public void administrativePenaltyExport(String json,HttpServletRequest request, HttpServletResponse response) throws Exception {
JSONObject jsonObject = JSONObject.parseObject(json);
try {
//处理数据
List<List<String>> rowList=getAdministrativePenaltyData(jsonObject);
if(!CollectionUtils.isEmpty(rowList)){
Map map=new HashMap();
map.getOrDefault("fileName","数据报表");
String fileName= Optional.ofNullable(jsonObject.getString("fileName")).orElse("数据报表");
String headTitle= Optional.ofNullable(jsonObject.getString("headTitle")).orElse("数据报表");
List<String> titles= (List<String>) jsonObject.get("titles");
if（titles == null || titles .size() == 0）{
titles =Arrays.asList("检查文书号","单位名称","地址","检查人","检查开始时间","检查结束时间")
}
String sheetName= Optional.ofNullable(jsonObject.getString("sheetName")).orElse("sheet");
excelExportUtil.responseExcel(request,response,fileName,sheetName,headTitle,titles,rowList);
}
} catch (Exception e) {
e.printStackTrace();
}
}
package com.example.util.common;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.springframework.stereotype.Component;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
/**
* @author LiYuhang
* @version 0.1
* @application poi 单sheet导出
* @Date 2020/6/4 8:42
*/
@Component
public class ExcelExportUtil {
/**
* 常规导出 封装数据
* @param request
* @param response
* @param fileName 文件名称
* @param sheetName 工作簿名称
* @param headTitle 大标题
* @param titles 列头标题
* @param data 数据
*/
public void responseExcel(HttpServletRequest request, HttpServletResponse response, String fileName, String sheetName, String headTitle, List<String> titles, List<List<String>> data){
try {
HSSFWorkbook workbook = new HSSFWorkbook();
Sheet sheet = workbook.createSheet(sheetName);
int index = 0;
/***********大标题 跨行跨列****/
CellRangeAddress region = new CellRangeAddress(0, 0, 0, data.get(0).size() - 1);
sheet.addMergedRegion(region);
Row titleRow = sheet.createRow(index++);
//行高
titleRow.setHeightInPoints(30F);
Cell titleCell = titleRow.createCell(0);
CellStyle topStyle = this.getTopCell(workbook);
titleCell.setCellStyle(topStyle);
titleCell.setCellValue(headTitle);
//列头
Row headerRow = sheet.createRow(index++);
headerRow.setHeightInPoints(25F);
CellStyle titleStyle = this.getHeadCell(workbook);
for(int j = 0; j < titles.size(); j++) {
headerRow.createCell(j).setCellStyle(titleStyle);
headerRow.getCell(j).setCellValue(titles.get(j));
}
this.creatBodyCell(index,workbook,data,sheet,titles.size());
this.responseBrowser(request,response,fileName,workbook);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 返回数据到浏览器
* @param request
* @param response
* @param fileName
* @param workbook
*/
public void responseBrowser(HttpServletRequest request,HttpServletResponse response ,String fileName, HSSFWorkbook workbook){
try {
String userAgent = request.getHeader("user-agent");
if (userAgent != null && userAgent.indexOf("Firefox") >= 0
|| userAgent.indexOf("Chrome") >= 0 || userAgent.indexOf("Safari") >= 0) {
fileName = new String(fileName.getBytes(), "ISO8859-1");
} else {
fileName = URLEncoder.encode(fileName, "UTF8");
}
response.setCharacterEncoding("UTF-8");
response.setContentType("application/vnd.ms-excel;charset=UTF-8");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName+".xlsx");
response.addHeader("Pargam", "no-cache");
response.addHeader("Cache-Control", "no-cache");
OutputStream out = response.getOutputStream();
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 生产内容数据
* @param nowRowIndex
* @param workbook
* @param data
* @param sheet
* @param columnSize
*/
public void creatBodyCell(int nowRowIndex,HSSFWorkbook workbook ,List<List<String>> data, Sheet sheet,int columnSize){
// 创建数据行
AtomicInteger rowIndex = new AtomicInteger(nowRowIndex);
CellStyle bodyStyle = this.getBodyCell(workbook);
data.forEach(rowList -> {
Row row = sheet.createRow(rowIndex.getAndIncrement());
row.setHeightInPoints(20F);
AtomicInteger x = new AtomicInteger();
rowList.forEach((cellValue) ->{
Cell cell=row.createCell(x.getAndIncrement());
cell.setCellStyle(bodyStyle);
cell.setCellValue(cellValue);
});
});
/***列宽自适应**/
for(int j = 0; j < columnSize; j++) {
sheet.autoSizeColumn(j);
}
}
/**************************单元格样式*****************************************/
public CellStyle getTopCell(HSSFWorkbook workbook) {
HSSFCellStyle cellStyle=this.getCellStyle(workbook);
HSSFFont headFont=this.getFont(workbook,(short) 18,true);
cellStyle.setFont(headFont);
return cellStyle;
}
public CellStyle getHeadCell(HSSFWorkbook workbook) {
HSSFCellStyle cellStyle=this.getCellStyle(workbook);
HSSFFont headFont=this.getFont(workbook,(short) 16,true);
cellStyle.setFont(headFont);
return cellStyle;
}
public CellStyle getBodyCell(HSSFWorkbook workbook) {
HSSFCellStyle cellStyle=this.getCellStyle(workbook);
HSSFFont headFont=this.getFont(workbook,(short) 12,false);
cellStyle.setFont(headFont);
return cellStyle;
}
public HSSFFont getFont(HSSFWorkbook workbook ,short fontSize,boolean bold){
// 设置字体
HSSFFont font = workbook.createFont();
//设置字体大小
font.setFontHeightInPoints(fontSize);
if(bold){
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
}
//设置字体名字
font.setFontName("宋体");
return font;
}
public HSSFCellStyle getCellStyle(HSSFWorkbook workbook) {
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//设置底边框;
style.setBorderBottom(HSSFCellStyle.BORDER_NONE);
//设置左边框;
style.setBorderLeft(HSSFCellStyle.BORDER_NONE);
//设置右边框;
style.setBorderRight(HSSFCellStyle.BORDER_NONE);
//设置顶边框;
style.setBorderTop(HSSFCellStyle.BORDER_NONE);
//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;
}
}
最后 贴出excel导出图片