导出excel工具类和依赖
依赖
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>4.0.1</version>
</dependency>
<!--支持07年之前的-->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.0.1</version>
</dependency>
工具类
package com.xy.xuld.utils;
import com.xy.xuld.modules.vo.ExcelData;
import org.apache.commons.compress.utils.IOUtils;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.extensions.XSSFCellBorder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
/**
* Created by Dell on 2019/5/10.
*/
public class ExcelUtils {
private static Logger logger= LoggerFactory.getLogger(ExcelUtils.class);
public static void exportExcel(ExcelData data, HttpServletResponse response) throws Exception {
XSSFWorkbook wb = new XSSFWorkbook();
try {
String sheetName = data.getName();
if (null == sheetName) {
sheetName = "Sheet1";
}
XSSFSheet sheet = wb.createSheet(sheetName);
writeExcel(wb, sheet, data);
String fileName=data.getName()+"("+DateUtil.convertDate2String("yyyyMMddHHmmssSSS",new Date())+")"+".xlsx";
fileName = URLEncoder.encode(fileName, "utf-8");
// 告诉浏览器用什么软件可以打开此文件
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-disposition","attachment;filename="+fileName+"");
response.flushBuffer();
wb.write(response.getOutputStream());
} catch(Exception e){
e.printStackTrace();
}finally{
//此处需要关闭 wb 变量
wb.close();
}
}
private static void writeExcel(XSSFWorkbook wb, Sheet sheet, ExcelData data) {
int rowIndex = 0;
rowIndex = writeTitlesToExcel(wb, sheet, data.getTitles());
try {
writeRowsToExcel(wb, sheet, data.getRows(), rowIndex,data.getTitles());
} catch (IOException e) {
e.printStackTrace();
}
autoSizeColumns(sheet, data.getTitles().size() + 1);
}
//标题
private static int writeTitlesToExcel(XSSFWorkbook wb, Sheet sheet,List<String> titles) {
//行
int rowIndex = 0;
//列
int colIndex = 0;
Font titleFont = wb.createFont();
titleFont.setFontName("微软雅黑");
//titleFont.setBoldweight(Short.MAX_VALUE);
// titleFont.setFontHeightInPoints((short) 14);
titleFont.setColor(IndexedColors.BLACK.index);
XSSFCellStyle titleStyle = wb.createCellStyle();
titleStyle.setAlignment(HorizontalAlignment.CENTER);//水平居中
titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
titleStyle.setBorderBottom(BorderStyle.THIN); //下边框
titleStyle.setRightBorderColor(IndexedColors.GOLD.getIndex());//边框颜色
titleStyle.setBorderLeft(BorderStyle.THIN);//左边框
titleStyle.setBorderTop(BorderStyle.THIN);//上边框
titleStyle.setBorderRight(BorderStyle.THIN);//右边框
//THIN 正常 THICK 加粗 DOUBLE两条 DASH_DOT虚线
/*titleStyle.setFillForegroundColor(new XSSFColor(new Color(182, 184, 192)));
titleStyle.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND);*/
titleStyle.setFont(titleFont);
titleStyle.setWrapText(true);//设置自动换行
// titleStyle.setFillForegroundColor(IndexedColors.RED.index);
// setBorder(titleStyle, BorderStyle.THIN, new XSSFColor(new Color(0, 0, 0)));
Row titleRow = sheet.createRow(rowIndex);
//====添加一个标题======
//设置标题样式
XSSFCellStyle titleStyle2 = wb.createCellStyle();
titleStyle2.setAlignment(HorizontalAlignment.CENTER);//水平居中
titleStyle2.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
Font titleFont2 = wb.createFont();
titleFont2.setFontName("微软雅黑");
//titleFont.setBoldweight(Short.MAX_VALUE);
titleFont2.setFontHeightInPoints((short) 18);
titleFont2.setColor(IndexedColors.BLACK.index);
titleStyle2.setFont(titleFont2);
Cell cell2 = titleRow.createCell(0);
cell2.setCellValue(sheet.getSheetName());
cell2.setCellStyle(titleStyle2);
//合并单元格参数分别代表 起始行，截至行，起始列， 截至列
sheet.addMergedRegion(new CellRangeAddress(rowIndex, ++rowIndex, 0,titles.size()-1));
rowIndex++;
//======结束=======
//====添加一个二级标题======
//设置样式
XSSFCellStyle titleStyle3 = wb.createCellStyle();
titleStyle3.setAlignment(HorizontalAlignment.LEFT);//水平居中
titleStyle3.setFont(titleFont);
titleRow = sheet.createRow(rowIndex);
Cell cell3 = titleRow.createCell(0);
cell3.setCellValue("创建时间:"+new SimpleDateFormat("yyyy.MM.dd").format(new Date()));
cell3.setCellStyle(titleStyle3);
if(titles.size()==1){
sheet.addMergedRegion(new CellRangeAddress(rowIndex, rowIndex, 0,1));
}else {
sheet.addMergedRegion(new CellRangeAddress(rowIndex, rowIndex, 0,titles.size()-1));
}
rowIndex++;
//======结束=======
//重新定位所在行
titleRow = sheet.createRow(rowIndex);
// titleRow.setHeightInPoints(25);
colIndex = 0;
// sheet.addMergedRegion(new CellRangeAddress(0, 0, 0,titles.size()-1));
for (String field : titles) {
Cell cell = titleRow.createCell(colIndex);
cell.setCellValue(field);
cell.setCellStyle(titleStyle);
colIndex++;
}
rowIndex++;
return rowIndex;
}
//内容
private static int writeRowsToExcel(XSSFWorkbook wb, Sheet sheet, List<List<Object>> rows, int rowIndex,List<String> titles) throws IOException {
int colIndex = 0;
Font dataFont = wb.createFont();
dataFont.setFontName("微软雅黑");
// dataFont.setFontHeightInPoints((short) 14);
dataFont.setColor(IndexedColors.BLACK.index);
int flag=0;
for (int i = 0; i < titles.size(); i++) {
if(titles.get(i).contains("图片")){
flag=i;
break;
}
}
XSSFCellStyle dataStyle = wb.createCellStyle();
dataStyle.setAlignment(HorizontalAlignment.CENTER);//水平居中
dataStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
dataStyle.setFont(dataFont);
int i=0;
for (List<Object> rowData : rows) {
Row dataRow = sheet.createRow(rowIndex);
dataRow.setHeightInPoints(50);
colIndex = 0;
for (Object cellData : rowData) {
Cell cell = dataRow.createCell(colIndex);
if (cellData != null) {
if(colIndex==flag&&cellData.toString().contains("http://")){
cell.setCellValue("");
try {
Drawing drawing = sheet.createDrawingPatriarch();
CreationHelper helper = wb.getCreationHelper();
URL url = new URL(cellData.toString());
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
boolean notfind =false;
try {
urlConnection.setConnectTimeout(300);
urlConnection.setReadTimeout(1000);
if(urlConnection.getResponseCode()>=400){
notfind =true;
}}catch (Exception e) {
notfind =true;
}
if (!notfind) {
InputStream is = new BufferedInputStream(url.openStream());
byte[] bytes = IOUtils.toByteArray(is);
int pictureIdx = wb.addPicture(bytes, Workbook.PICTURE_TYPE_JPEG);
is.close();
ClientAnchor anchor = helper.createClientAnchor();
anchor.setDx1(0);
anchor.setDy1(0);
anchor.setDx2(0);
anchor.setDy2(0);
anchor.setCol1(flag);
anchor.setRow1(4+i);
anchor.setCol2(flag+1);
anchor.setRow2(5+i);
Picture pict = drawing.createPicture(anchor, pictureIdx);
}
} catch (IOException e) {
e.printStackTrace();
logger.error("图片未找到");
}
}
else {
cell.setCellValue(cellData.toString());
}
} else {
cell.setCellValue("");
}
cell.setCellStyle(dataStyle);
colIndex++;
}
i++;
rowIndex++;
}
return rowIndex;
}
private static void autoSizeColumns(Sheet sheet, int columnNumber) {
for (int i = 0; i < columnNumber; i++) {
int orgWidth = sheet.getColumnWidth(i);
sheet.autoSizeColumn(i, true);
int newWidth = (int) (sheet.getColumnWidth(i) + 100);
if(newWidth<255*256){
sheet.setColumnWidth(i, newWidth < 3000 ? 3000 : newWidth);
}else{
sheet.setColumnWidth(i,6000 );
}
/*if (newWidth > orgWidth) {
sheet.setColumnWidth(i, newWidth);
} else {
sheet.setColumnWidth(i, orgWidth);
}*/
}
}
private static void setBorder(XSSFCellStyle style, BorderStyle border, XSSFColor color) {
style.setBorderTop(border);
style.setBorderLeft(border);
style.setBorderRight(border);
style.setBorderBottom(border);
style.setBorderColor(XSSFCellBorder.BorderSide.TOP, color);
style.setBorderColor(XSSFCellBorder.BorderSide.LEFT, color);
style.setBorderColor(XSSFCellBorder.BorderSide.RIGHT, color);
style.setBorderColor(XSSFCellBorder.BorderSide.BOTTOM, color);
}
}