POI XSSFWorkbook读取网络中的图片资源导入EXCEL中

POI XSSFWorkbook读取网络中的图片资源导入EXCEL中

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摘要

Poi导出Excel有多种java类可以实现,但实现的原理几乎都是相同的:
1.创建工作博 2.创建sheet 3.创建行(row) 4.创建cell单元格 5.将数据加入单元格。下面是总结的代码。

代码结构

• **导出方法: **
  • public static void exportExcelImg(HttpServletResponse response, String fileName, ExcelData data) throws Exception {}
• **封装实体类: **
  • public class ExcelData implements Serializable{}

代码

*ExcelData:*用来封装导出数据的实体类

*exportExcelImg(…):*导出方法

package com.zhaopin.pinebase.util;

import java.awt.image.BufferedImage;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.List;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.*;
import com.zhaopin.pinebase.modules.zhaopin.form.ExcelData;

public class ExportExcelUtils {
	public static void exportExcel(HttpServletResponse response, String fileName, ExcelData data) throws Exception {
        // 告诉浏览器用什么软件可以打开此文件
        response.setHeader("content-Type", "application/vnd.ms-excel");
        // 下载文件的默认名称
        response.setHeader("Content-Disposition", "attachment;filename="+URLEncoder.encode(fileName, "utf-8"));
        exportExcel(data, response.getOutputStream());
    }

    //导出带有图片的excel
    public  static void exportExcelImg(HttpServletResponse response, String fileName,
                                       ExcelData data)  throws Exception {
        FileOutputStream fileOut = null;
        BufferedImage bufferImg = null;//logo
        ByteArrayOutputStream byteArrayOut = null; //读进图片
        HttpURLConnection conn =null;

        response.setHeader("content-Type", "application/vnd.ms-excel");// 告诉浏览器用什么软件可以打开此文件
        response.setHeader("Content-Disposition", "attachment;filename="+URLEncoder.encode(fileName, "utf-8"));

        XSSFWorkbook wb = new XSSFWorkbook();
        try {
            String sheetName = data.getName();
            if (null == sheetName) {
                sheetName = "Sheet1";
            }
            XSSFSheet sheet = wb.createSheet(sheetName);

            int width = 25;
            sheet.setColumnWidth(0, 256*width+100);//列宽
            sheet.setColumnWidth(1, 256*width+100);
            sheet.setColumnWidth(2, 256*width+100);


            XSSFDrawing patriarch = sheet.createDrawingPatriarch();

            //导出标题
            int rowIndex = 0;
            rowIndex = writeTitlesToExcel(wb, sheet, data.getTitles());

            //字体样式
            int colIndex = 0;
            Font dataFont = wb.createFont();
            dataFont.setFontName("simsun");
            dataFont.setColor(IndexedColors.BLACK.index);

            //设置单元格类型
            XSSFCellStyle cellStyle = wb.createCellStyle();
            cellStyle.setFont(dataFont);
            cellStyle.setAlignment(cellStyle.getAlignmentEnum().CENTER);//水平居中
            cellStyle.setWrapText(true);//自动换行

            //遍历每行, 遍历单元格
            for (List