POI 導出excel 包含圖片導出

不多說，直接上代碼

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
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.ss.usermodel.Cell;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.sjdf.erp.common.constant.CommonPlatformConstant;
import com.sjdf.erp.common.utils.PlatformUtils;

public class ExcelUntilTest {

    private static final Logger LOGGER = LoggerFactory.getLogger(ExcelUntilTest.class);

    public static final String XLSX = ".xlsx";
    public static final String XLS=".xls";

    /**
     * Excel導出
     * @param title 導出Excel文件名稱
     * @param rowList 第一個List為表頭，其余行為表數據
     * @param resp HttpServletResponse 對象
     * @throws IOException
     */
    public static void writeExcel(String title,List<List<Object>> rowList,HttpServletResponse resp) throws IOException{
        if (resp == null) {
            throw new NullPointerException("the HttpServletResponse is null");
        }
        HSSFWorkbook book = warpSingleWorkbook(title, rowList, false);
        // 響應客戶端
        String filename = new String(title.getBytes("UTF-8"), "ISO-8859-1");
        resp.reset();
        resp.setHeader("Content-disposition", "attachment; filename=" + filename +XLS);
        resp.setContentType("application/vnd.ms-excel;charset=UTF-8");
        // 輸出Excel文件
        book.write(resp.getOutputStream());
        book.close();
    }

    /**
     * Excel導出設置Workbook
     * @param title 導出Excel文件名稱
     * @param rowList 第一個List為表頭，其余行為表數據
     * @param downLoadPic 是否下載圖片
     * @throws IOException
     */
    public static HSSFWorkbook warpSingleWorkbook(String title,List<List<Object>> rowList, Boolean downLoadPic) throws IOException {
        String filename = title;
        if (!PlatformUtils.hasText(title)) {
            filename = new SimpleDateFormat("yyMMddHHmmss").format(new Date());
        }
        if (rowList == null || rowList.isEmpty()) {
            throw new NullPointerException("the row list is null");
        }
        HSSFWorkbook book = new HSSFWorkbook();
        // 創建表
        HSSFSheet sheet = book.createSheet(filename);
        // 設置單元格默認寬度為15個字符
        sheet.setDefaultColumnWidth(15);
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
        // 設置表頭樣式
        HSSFCellStyle style = book.createCellStyle();
        // 設置居左
        style.setAlignment(HSSFCellStyle.ALIGN_LEFT);
        // 檢測表頭數據（表頭不允許數據為空）
        List<Object> head = rowList.get(0);
        for (Object key : head) {
            if (!PlatformUtils.hasText(key.toString())) {
                book.close();
                throw new NullPointerException("there is a blank exist head row");
            }
        }
        // 寫數據
        int size = rowList.get(0).size();
        for (int i = 0; i < rowList.size(); i++) {
            List<Object> row = rowList.get(i);
            if (row == null || row.isEmpty()) {
                book.close();
                throw new NullPointerException("the "+(i+1)+"th row is null");
            }
            if (size != row.size()) {
                book.close();
                throw new IllegalArgumentException("the cell number of "+(i+1)+"th row is different form the first");
            }
            HSSFRow sr = sheet.createRow(i);
            for (int j = 0; j < row.size(); j++) {
                if (downLoadPic && i > 0 && j == 0) {
                    sr.setHeight((short) (800));
                    drawPictureInfoExcel(book, patriarch, i, row.get(0).toString());
                } else {
                    setExcelValue(sr.createCell(j), row.get(j), style);
                }
            }
        }
        return book;
    }

    public static void main(String[] args) {
        FileOutputStream fileOut = null;     
       try {  
           String picUrl1 = "http://b-ssl.duitang.com/uploads/item/201502/17/20150217161549_C4K8L.jpeg";
           String picUrl2 = "http://b-ssl.duitang.com/uploads/item/201512/10/20151210135838_Y2SvK.jpeg";
           String picUrl3 = "http://img5.duitang.com/uploads/item/201407/23/20140723175802_LHCJU.jpeg";
           List<List<Object>> rowList = new ArrayList<List<Object>>();
           rowList.add(Arrays.asList("圖片", "名稱", "sku"));
           rowList.add(Arrays.asList(picUrl1, "名稱1", "sku01"));
           rowList.add(Arrays.asList(picUrl2, "名稱2", "sku02"));
           rowList.add(Arrays.asList(picUrl3, "名稱3", "sku03"));
           HSSFWorkbook wb = warpSingleWorkbook("test", rowList, false);
           fileOut = new FileOutputStream("D:/測試Excel.xls");     
           // 寫入excel文件     
            wb.write(fileOut);     
            System.out.println("----Excle文件已生成------");  
       } catch (Exception e) {  
           e.printStackTrace();  
       }finally{  
           if(fileOut != null){
                try {  
                   fileOut.close();  
               } catch (IOException e) {  
                   e.printStackTrace();  
               }  
           } 
       }  }

    private static void drawPictureInfoExcel(HSSFWorkbook wb,HSSFPatriarch patriarch,int rowIndex,String pictureUrl){
        //rowIndex代表當前行
        try {
            
            if(PlatformUtils.hasText(pictureUrl)) {
                URL url = new URL(pictureUrl);  
                //打開鏈接  
                HttpURLConnection conn = (HttpURLConnection)url.openConnection();  
                //設置請求方式為"GET"  
                conn.setRequestMethod("GET");  
                //超時響應時間為5秒  
                conn.setConnectTimeout(5 * 1000);  
                //通過輸入流獲取圖片數據  
                InputStream inStream = conn.getInputStream();  
                //得到圖片的二進制數據，以二進制封裝得到數據，具有通用性  
                byte[] data = readInputStream(inStream);  
                //anchor主要用於設置圖片的屬性  
                HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 250,(short) 0, rowIndex, (short) 0, rowIndex);
                //Sets the anchor type （圖片在單元格的位置）
                //0 = Move and size with Cells, 2 = Move but don't size with cells, 3 = Don't move or size with cells.
                anchor.setAnchorType(3);
                patriarch.createPicture(anchor, wb.addPicture(data, HSSFWorkbook.PICTURE_TYPE_JPEG));   
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static byte[] readInputStream(InputStream inStream) throws Exception{  
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();  
        //創建一個Buffer字符串  
        byte[] buffer = new byte[1024];  
        //每次讀取的字符串長度，如果為-1，代表全部讀取完畢  
        int len = 0;  
        //使用一個輸入流從buffer里把數據讀取出來  
        while( (len=inStream.read(buffer)) != -1 ){  
            //用輸出流往buffer里寫入數據，中間參數代表從哪個位置開始讀，len代表讀取的長度  
            outStream.write(buffer, 0, len);  
        }  
        //關閉輸入流  
        inStream.close();  
        //把outStream里的數據寫入內存  
        return outStream.toByteArray();  
    }

    /**
     * 設置Excel浮點數可做金額等數據統計
     * @param cell 單元格類
     * @param value 傳入的值
     */
    public static void setExcelValue(HSSFCell cell, Object value, HSSFCellStyle style){
        // 寫數據
        if (value == null) {
            cell.setCellValue("");
        }else {
            if (value instanceof Integer || value instanceof Long) {
                cell.setCellType(Cell.CELL_TYPE_NUMERIC);
                cell.setCellValue(Long.valueOf(value.toString()));
            } else if (value instanceof BigDecimal) {
                cell.setCellType(Cell.CELL_TYPE_NUMERIC);
                cell.setCellValue(((BigDecimal)value).setScale(CommonPlatformConstant.INT_3, RoundingMode.HALF_UP).doubleValue());
            } else {
                cell.setCellValue(value.toString());
            }
            cell.setCellStyle(style);
        }
    }

}

// 參數解析

HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 250,(short) 0, rowIndex, (short) 0, rowIndex)

Parameters:
dx1 - the x coordinate within the first cell.//定義了圖片在第一個cell內的偏移x坐標，既左上角所在cell的偏移x坐標，一般可設0
dy1 - the y coordinate within the first cell.//定義了圖片在第一個cell的偏移y坐標，既左上角所在cell的偏移y坐標，一般可設0
dx2 - the x coordinate within the second cell.//定義了圖片在第二個cell的偏移x坐標，既右下角所在cell的偏移x坐標，一般可設0
dy2 - the y coordinate within the second cell.//定義了圖片在第二個cell的偏移y坐標，既右下角所在cell的偏移y坐標，一般可設0
col1 - the column (0 based) of the first cell.//第一個cell所在列，既圖片左上角所在列
row1 - the row (0 based) of the first cell.//圖片左上角所在行
col2 - the column (0 based) of the second cell.//圖片右下角所在列
row2 - the row (0 based) of the second cell.//圖片右下角所在行
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作者：中華雪碧
來源：CSDN
原文：https://blog.csdn.net/gagewang1/article/details/53870843?utm_source=copy
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