POI向word添加图片,表格

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本文介绍了如何修复POI在处理Word文档时的图片显示问题，并提供了利用JFreeChart和POI生成图表插入Word文档的示例。包括使用自定义XWPFDocument类实现图片追加功能、生成Word文档、添加表格和图表等操作。

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package com.xxx.yyy.commons;
 
import java.io.IOException;
import java.io.InputStream;

import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.xmlbeans.XmlException;
import org.apache.xmlbeans.XmlToken;
import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;
import org.openxmlformats.schemas.drawingml.x2006.main.CTPositiveSize2D;
import org.openxmlformats.schemas.drawingml.x2006.wordprocessingDrawing.CTInline;
  
/** 
 * @author POI 导出图片bug修复
 *  
 */  
public class CustomXWPFDocument extends XWPFDocument {  
    public CustomXWPFDocument(InputStream in) throws IOException {  
        super(in);  
    }  
  
    /** 
     *  
     */  
    public CustomXWPFDocument() {  
        super();  
        // TODO Auto-generated constructor stub   
    }  
  
    /** 
     * @param pkg 
     * @throws IOException 
     */  
    public CustomXWPFDocument(OPCPackage pkg) throws IOException {  
        super(pkg);  
        // TODO Auto-generated constructor stub   
    }  // picAttch 图片后面追加的字符串 可以是空格
    public void createPicture(XWPFParagraph paragraph,int id, int width, int height,String picAttch) {  
        final int EMU = 9525;  
        width *= EMU;  
        height *= EMU;  
        String blipId = getAllPictures().get(id).getPackageRelationship()  
                .getId();  
  
        CTInline inline = paragraph.createRun().getCTR()  
                .addNewDrawing().addNewInline();  
        paragraph.createRun().setText(picAttch);
        String picXml = ""  
                + "<a:graphic xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\">"  
                + "   <a:graphicData uri=\"http://schemas.openxmlformats.org/drawingml/2006/picture\">"  
                + "      <pic:pic xmlns:pic=\"http://schemas.openxmlformats.org/drawingml/2006/picture\">"  
                + "         <pic:nvPicPr>" + "            <pic:cNvPr id=\""  
                + id  
                + "\" name=\"Generated\"/>"  
                + "            <pic:cNvPicPr/>"  
                + "         </pic:nvPicPr>"  
                + "         <pic:blipFill>"  
                + "            <a:blip r:embed=\""  
                + blipId  
                + "\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\"/>"  
                + "            <a:stretch>"  
                + "               <a:fillRect/>"  
                + "            </a:stretch>"  
                + "         </pic:blipFill>"  
                + "         <pic:spPr>"  
                + "            <a:xfrm>"  
                + "               <a:off x=\"0\" y=\"0\"/>"  
                + "               <a:ext cx=\""  
                + width  
                + "\" cy=\""  
                + height  
                + "\"/>"  
                + "            </a:xfrm>"  
                + "            <a:prstGeom prst=\"rect\">"  
                + "               <a:avLst/>"  
                + "            </a:prstGeom>"  
                + "         </pic:spPr>"  
                + "      </pic:pic>"  
                + "   </a:graphicData>" + "</a:graphic>";  
  
        // CTGraphicalObjectData graphicData =   
        inline.addNewGraphic().addNewGraphicData();  
        XmlToken xmlToken = null;  
        try {  
            xmlToken = XmlToken.Factory.parse(picXml);  
        } catch (XmlException xe) {  
            xe.printStackTrace();  
        }  
        inline.set(xmlToken);  
        // graphicData.set(xmlToken);   
  
        inline.setDistT(0);  
        inline.setDistB(0);  
        inline.setDistL(0);  
        inline.setDistR(0);  
  
        CTPositiveSize2D extent = inline.addNewExtent();  
        extent.setCx(width);  
        extent.setCy(height);  
  
        CTNonVisualDrawingProps docPr = inline.addNewDocPr();  
        docPr.setId(id);  
        docPr.setName("图片" + id);  
        docPr.setDescr("");  
    }  
}

POI或者JXL、docx4j，都是基于公开的标准做的。Office自2007版本开始使用ooxml，压缩的xml文档，2007之前都是二进制的B+树。但是2007+版本也只是把文件通用性结构部分公开了,微软的半开放导致一残废则都残废。所以设计到真正的图表，Flash 都没法子了。上面的类是代替POI中的XWPFDocument。因为继承了XWPFDocument，所以addPictureData不用重写了，图片显示的方法新增一下。这是因为POI 在拼装xml的时候把图片数据放入了，但是没有给提供显示的方法。用了OOXML就要用2007+版本，之所以选择它是因为2007+已经成为了世界标准。2007更是一个里程碑(不谈对微软情感看法)。(忘记说了POI 对word处理相当不给力，上面的代码是添加图片的bug处理，即使因为官方少了一段显示图片的xml)

action:

	public void exportToWord2(){
		try {
	        int picWidth = 240;
	        int picHeight = 150;
	        int picType = XWPFDocument.PICTURE_TYPE_JPEG;
	        String filePath = "简报.docx";
	        response.reset(); // 清空buffer
	        response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
			filePath = java.net.URLEncoder.encode(filePath, "UTF-8");
			response.setHeader("Content-Disposition", "attachment; filename="+ new String(filePath.getBytes("UTF-8"), "GBK"));// 定义文件名
			response.setHeader("Pragma", "no-cache");
			response.setHeader("Expires", " 0");
			ServletOutputStream fOut = response.getOutputStream();
			XWPFParagraph paragraph = null;
			XWPFTable table = null;
			CustomXWPFDocument doc = new CustomXWPFDocument();
			paragraph = doc.createParagraph();
			doc.addPictureData(picInputStream,picType);
			doc.createPicture(paragraph,doc.getAllPictures().size()-1, picWidth, picHeight,"");
			doc.write(fOut);
			fOut.flush();
			fOut.close();
			response.getOutputStream().flush();
			response.getOutputStream().close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

其中picInputStream 省略，这个图可以是又Jfreechart得到。

JFreeChart chart = null; 
//.......省略
ByteArrayOutputStream out = new ByteArrayOutputStream();
			ChartUtilities.writeChartAsPNG(out, chart, 400, 300);
	ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
return in;

这样通过Jfreechart就可以得到ByteArrayInputStream.

因为addPictureData方法接收的参数是InputStream 看到网上很多人喜欢先写入操作系统，然后读取到流，我不喜。在生成图片的时候直接放到ByteArrayInputStream(继承了抽象类InputStream)，直接获取就少了存储相关的操作。JFreechart获取inputStream也就这2行代码。

createPicture方法的picAttch是图片之间放的东西可以是N个空格做间隔，也可以是文字

弄一个word文件写入磁盘中测试例子，包含POI生成表格到word，jfreechart和POI生成图插入到word.需要jfreechart和poi ooxml的jar

import java.awt.Color;
import java.awt.Font;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFTable;
import org.apache.poi.xwpf.usermodel.XWPFTableRow;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;
 

public class CreateTablesWithPOI {
	public static void main(String[] args) {
		String outputFile = "D:\\test.docx";
		CustomXWPFDocument document = new CustomXWPFDocument();
		XWPFTable tableOne = document.createTable();
		XWPFTableRow tableOneRowOne = tableOne.getRow(0);
		tableOneRowOne.getCell(0).setText("第1行第1列");
		tableOneRowOne.addNewTableCell().setText("第1行第2列");
		tableOneRowOne.addNewTableCell().setText("第1行第3列");
		tableOneRowOne.addNewTableCell().setText("第1行第4列");
		XWPFTableRow tableOneRowTwo = tableOne.createRow();
		tableOneRowTwo.getCell(0).setText("第2行第1列");
		tableOneRowTwo.getCell(1).setText("第2行第2列");
		tableOneRowTwo.getCell(2).setText("第2行第3列");
		FileOutputStream fOut;
		try {
			fOut = new FileOutputStream(outputFile);
			ByteArrayInputStream  in = getPieChartImage();
			String ind = document.addPictureData(in, XWPFDocument.PICTURE_TYPE_JPEG); 
			System.out.println("pic ID=" + ind);
			document.createPicture(document.getAllPictures().size()-1, 200, 200,"    "); 
			// 放第二张图
			ind = document.addPictureData(getBarChartImage(), XWPFDocument.PICTURE_TYPE_JPEG); 
			System.out.println("pic ID=" + ind);
			document.createPicture(document.getAllPictures().size()-1, 200, 200,"    "); 
			document.write(fOut); 
			fOut.flush();
			// 操作结束，关闭文件
			fOut.close();
		} catch (Exception e) {
			e.printStackTrace();
		} 
	}
	public static ByteArrayInputStream getPieChartImage() {
		ByteArrayInputStream in = null;
		DefaultPieDataset pieDataset = new DefaultPieDataset();
		pieDataset.setValue(" 北京局 ", 20);
		pieDataset.setValue(" 上海局 ", 18);
		pieDataset.setValue(" 天津局 ", 16);
		pieDataset.setValue(" 重庆局 ", 15);
		pieDataset.setValue(" 山东局 ", 45);
		JFreeChart chart = ChartFactory.createPieChart3D(" 企业备案图 ", pieDataset,
				true, false, false);
		// 设置标题字体样式
		chart.getTitle().setFont(new Font(" 黑体 ", Font.BOLD, 20));
		// 设置饼状图里描述字体样式
		PiePlot piePlot = (PiePlot) chart.getPlot();
		piePlot.setLabelFont(new Font(" 黑体 ", Font.BOLD, 10));
		// 设置显示百分比样式
		piePlot.setLabelGenerator(new StandardPieSectionLabelGenerator(
				(" {0}({2}) "), NumberFormat.getNumberInstance(),
				new DecimalFormat(" 0.00% ")));
		// 设置统计图背景
		piePlot.setBackgroundPaint(Color.white);
		// 设置图片最底部字体样式
		chart.getLegend().setItemFont(new Font(" 黑体 ", Font.BOLD, 10));
		try {
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			ChartUtilities.writeChartAsPNG(out, chart, 400, 300);
		    in  = new ByteArrayInputStream(out.toByteArray());
		} catch (Exception e) {
			e.printStackTrace();
		} 
		return in;
	}
	
	public static ByteArrayInputStream getBarChartImage() {
		ByteArrayInputStream in = null;
		DefaultCategoryDataset dataset =new DefaultCategoryDataset(); 
		dataset.addValue(100,"Spring　Security","Jan");
		dataset.addValue(200,"jBPM　4","Jan");
		dataset.addValue(300,"Ext　JS","Jan");
		dataset.addValue(400,"JFreeChart","Jan");
		JFreeChart chart = ChartFactory.createBarChart("chart","num","type",dataset, PlotOrientation.VERTICAL, true, false, false); 
		// 设置标题字体样式
		chart.getTitle().setFont(new Font(" 黑体 ", Font.BOLD, 20));
		// 设置饼状图里描述字体样式
		// 设置图片最底部字体样式
		chart.getLegend().setItemFont(new Font(" 黑体 ", Font.BOLD, 10));
		try {
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			ChartUtilities.writeChartAsPNG(out, chart, 400, 300);
		    in  = new ByteArrayInputStream(out.toByteArray());
		} catch (Exception e) {
			e.printStackTrace();
		} 
		return in;
	}
}

POI中设置一段文字我们可以写一个静态通用方法createParagraphContent，大致内容如下POI.java

	public static void createParagraphContent(CustomXWPFDocument doc,String content) {
		XWPFRun title= doc.createParagraph().createRun();// 设置一个新的段落
		title.setText(content); 
		title.setFontFamily("宋体"); 
		title.setBold(true); 
	}

itext的例子请参考 http://oneinit.iteye.com/blog/1529917

图表 http://www.dotblogs.com.tw/angus/archive/2010/05/19/15332.aspx