POI插入图片的尺寸计算
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CreationHelper helper = wb.getCreationHelper(); Drawing drawing = sheet.createDrawingPatriarch(); ClientAnchor anchor = helper.createClientAnchor(); int pictureIdx = wb.addPicture(IOUtils.toByteArray(new FileInputStream("img.png")), Workbook.PICTURE_TYPE_PNG); anchor.setRow1(5); anchor.setCol1(3); anchor.setDx1(40); anchor.setDy1(8); anchor.setRow2(5); anchor.setCol2(3); anchor.setDx2(741); anchor.setDy2(152); drawing.createPicture(anchor, pictureIdx);?插入一个301PX * 301 px的图片代码如上。
经过计算
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上面的例子列宽度16000，行高度8000
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/** * excel的长度计算复杂有没有文档，也没找到相关蚊帐。 * POI EXCEL 默认colWidth 1023, rowHeight 255，单位未知，Anchor里坐标和colWidth, rowHeight有关。 * ExcelUtil方便我们将px值变为POI的坐标值或者宽高，但是会有些许误差。 * @author lazy_ * */static class ExcelUtil{public static int getAnchorX(int px, int colWidth){return (int) Math.round(( (double)701*16000.0/301)*((double)1/colWidth)*px);}public static int getAnchorY(int px, int rowHeight){return (int) Math.round(( (double)144 * 8000/301)*((double)1/rowHeight)*px);}public static int getRowHeight(int px){return (int) Math.round(((double)4480/300) * px);}public static int getColWidth(int px){return (int) Math.round(((double)10971/300) * px);}}??
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package com.lazyunderscore;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.LinkedHashMap;import java.util.List;import java.util.Map;import org.apache.commons.io.IOUtils;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.ss.util.CellRangeAddress;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.CellStyle;import org.apache.poi.ss.usermodel.ClientAnchor;import org.apache.poi.ss.usermodel.CreationHelper;import org.apache.poi.ss.usermodel.Drawing;import org.apache.poi.ss.usermodel.Font;import org.apache.poi.ss.usermodel.IndexedColors;import org.apache.poi.ss.usermodel.Row;import org.apache.poi.ss.usermodel.Workbook;public class ExcelOperation {public static void main(String[] args) throws IOException{final int COL_WIDTH = 13000;final int ROW_HEIGHT = 5000;String name = "name";String remark = "remark";String period = "2013-01-01" + " ~ " + "2014-01-01";String memo = "memo";HSSFWorkbook wb = new HSSFWorkbook();HSSFSheet sheet = wb.createSheet("sheet"); for(int i=0;i<4;i++){ sheet.setColumnWidth(i, 5000);} sheet.setColumnWidth(3, COL_WIDTH); //header style Font headerFont = wb.createFont(); headerFont.setBoldweight((short) 700); CellStyle headerStyle = wb.createCellStyle(); headerStyle.setFont(headerFont); headerStyle.setAlignment(CellStyle.ALIGN_CENTER); headerStyle.setBorderBottom(CellStyle.BORDER_THIN); headerStyle.setBottomBorderColor(IndexedColors.BLACK.getIndex()); headerStyle.setBorderLeft(CellStyle.BORDER_THIN); headerStyle.setLeftBorderColor(IndexedColors.BLACK.getIndex()); headerStyle.setBorderRight(CellStyle.BORDER_THIN); headerStyle.setRightBorderColor(IndexedColors.BLACK.getIndex()); headerStyle.setBorderTop(CellStyle.BORDER_THIN); headerStyle.setTopBorderColor(IndexedColors.BLACK.getIndex()); //th style Font thFont = wb.createFont(); thFont.setBoldweight((short) 700); CellStyle thStyle = wb.createCellStyle(); thStyle.setFont(headerFont); thStyle.setAlignment(CellStyle.ALIGN_LEFT); thStyle.setBorderBottom(CellStyle.BORDER_THIN); thStyle.setBottomBorderColor(IndexedColors.BLACK.getIndex()); thStyle.setBorderLeft(CellStyle.BORDER_THIN); thStyle.setLeftBorderColor(IndexedColors.BLACK.getIndex()); thStyle.setBorderRight(CellStyle.BORDER_THIN); thStyle.setRightBorderColor(IndexedColors.BLACK.getIndex()); thStyle.setBorderTop(CellStyle.BORDER_THIN); thStyle.setTopBorderColor(IndexedColors.BLACK.getIndex()); //td style CellStyle tdStyle = wb.createCellStyle(); tdStyle.setAlignment(CellStyle.ALIGN_LEFT); tdStyle.setBorderBottom(CellStyle.BORDER_THIN); tdStyle.setBottomBorderColor(IndexedColors.BLACK.getIndex()); tdStyle.setBorderLeft(CellStyle.BORDER_THIN); tdStyle.setLeftBorderColor(IndexedColors.BLACK.getIndex()); tdStyle.setBorderRight(CellStyle.BORDER_THIN); tdStyle.setRightBorderColor(IndexedColors.BLACK.getIndex()); tdStyle.setBorderTop(CellStyle.BORDER_THIN); tdStyle.setTopBorderColor(IndexedColors.BLACK.getIndex()); LinkedHashMap<String,String> voucherInfoMap = new LinkedHashMap<String,String>(); voucherInfoMap.put("优惠券名称", name); voucherInfoMap.put("优惠券描述", remark); voucherInfoMap.put("有效期", period); voucherInfoMap.put("使用说明", memo); //1.头部优惠券信息 int rowCount = 0; for(Map.Entry<String, String> entry: voucherInfoMap.entrySet()){ String key = entry.getKey(); String value = entry.getValue(); Row row = sheet.createRow(rowCount); Cell cell0 = row.createCell(0); cell0.setCellValue(key); cell0.setCellStyle(headerStyle); Cell cell1 = row.createCell(1); cell1.setCellValue(value); cell1.setCellStyle(headerStyle); sheet.addMergedRegion(new CellRangeAddress(rowCount,rowCount,1,3)); row.createCell(2).setCellStyle(headerStyle); row.createCell(3).setCellStyle(headerStyle); rowCount++; } //2.列表头部 List<String> thNames =new ArrayList<String>(); thNames.add("序号"); thNames.add("门店"); thNames.add("门店名称"); thNames.add("二维码"); Row row = sheet.createRow(rowCount); int thCellCount = 0; for(String thName : thNames){ Cell cell = row.createCell(thCellCount); cell.setCellValue(thName); cell.setCellStyle(thStyle); thCellCount++; } rowCount++; //3.列表内容 row = sheet.createRow(rowCount); row.setHeight((short) ROW_HEIGHT); CreationHelper helper = wb.getCreationHelper(); Drawing drawing = sheet.createDrawingPatriarch(); ClientAnchor anchor = helper.createClientAnchor(); int pictureIdx = wb.addPicture(IOUtils.toByteArray(new FileInputStream("img.png")), Workbook.PICTURE_TYPE_PNG);//一个300*300的图片 anchor.setRow1(5); anchor.setCol1(3); anchor.setDx1(getAnchorX(5,COL_WIDTH)); anchor.setDy1(getAnchorY(5,ROW_HEIGHT)); anchor.setRow2(5); anchor.setCol2(3); anchor.setDx2(getAnchorX(305,COL_WIDTH)); anchor.setDy2(getAnchorY(305,ROW_HEIGHT)); drawing.createPicture(anchor, pictureIdx); // Write the output to a file ByteArrayOutputStream bos = new ByteArrayOutputStream(); wb.write(bos); byte[] bytes = bos.toByteArray(); IOUtils.copy(new ByteArrayInputStream(bytes), new FileOutputStream("workbook.xls")); }private static int getAnchorX(int px, int colWidth){return (int) Math.round(( (double)701*16000.0/301)*((double)1/colWidth)*px);}private static int getAnchorY(int px, int rowHeight){return (int) Math.round(( (double)144 * 8000/301)*((double)1/rowHeight)*px);}private static int getRowHeight(int px){return (int) Math.round(((double)4480/300) * px);}private static int getColWidth(int px){return (int) Math.round(((double)10971/300) * px);}}?S：完整一个POI EXCEL 测试例子如下：
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.lazyunderscore</groupId> <artifactId>Word2HtmlExample</artifactId> <packaging>jar</packaging> <version>1.0-SNAPSHOT</version> <name>Word2HtmlExample</name> <url>http://maven.apache.org</url> <dependencies> <!-- <dependency> --><!-- <groupId>org.apache.poi</groupId> --><!-- <artifactId>poi-scratchpad</artifactId> --><!-- <version>3.9</version> --><!-- </dependency> --><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.9</version></dependency><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>1.4</version></dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies></project>
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