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2023-06-27 01:48| 来源: 网络整理| 查看: 265

poi-tl导出word实现图片环绕方式为浮于在文字上方办法 poi-tl简介因为poi-tl暂时不支持设置图片环绕方式，但是可以自定义图片渲染插件

poi-tl简介

poi-tl（poi template language）是Word模板引擎，基于Microsoft Word模板和数据生成新的文档。文档地址：http://deepoove.com/poi-tl/1.7.x/

因为poi-tl暂时不支持设置图片环绕方式，但是可以自定义图片渲染插件

废话少说，直接上代码

首先自定义一个图片渲染插件

import com.deepoove.poi.data.PictureRenderData; import com.deepoove.poi.data.PictureType; import com.deepoove.poi.data.Pictures; import com.deepoove.poi.data.style.PictureStyle; import com.deepoove.poi.exception.RenderException; import com.deepoove.poi.policy.AbstractRenderPolicy; import com.deepoove.poi.render.RenderContext; import com.deepoove.poi.util.BufferedImageUtils; import com.deepoove.poi.util.SVGConvertor; import com.deepoove.poi.util.UnitUtils; import com.deepoove.poi.xwpf.BodyContainer; import com.deepoove.poi.xwpf.BodyContainerFactory; import com.deepoove.poi.xwpf.WidthScalePattern; import com.deepoove.poi.xwpf.XWPFRunWrapper; import org.apache.poi.util.Units; import org.apache.poi.xwpf.usermodel.IBodyElement; import org.apache.poi.xwpf.usermodel.ParagraphAlignment; import org.apache.poi.xwpf.usermodel.XWPFParagraph; import org.apache.poi.xwpf.usermodel.XWPFRun; import org.openxmlformats.schemas.drawingml.x2006.main.CTGraphicalObject; import org.openxmlformats.schemas.drawingml.x2006.wordprocessingDrawing.CTAnchor; import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTDrawing;import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.InputStream; import java.util.function.Supplier;/*** 自定义图片渲染*/ public class MyPictureRenderPolicy extends AbstractRenderPolicy {@Overrideprotected boolean validate(Object data) {if (null == data) {return false;} else if (data instanceof PictureRenderData) {return null != ((PictureRenderData) data).getPictureSupplier();} else {return true;}}@Overridepublic void doRender(RenderContext context) throws Exception {MyPictureRenderPolicy.Helper.renderPicture(context.getRun(), wrapper(context.getData()));}@Overrideprotected void afterRender(RenderContext context) {this.clearPlaceholder(context, false);}@Overrideprotected void reThrowException(RenderContext context, Exception e) {this.logger.info("Render picture " + context.getEleTemplate() + " error: {}", e.getMessage());String alt = "";if (context.getData() instanceof PictureRenderData) {alt = ((PictureRenderData) context.getData()).getAltMeta();}context.getRun().setText(alt, 0);}private static PictureRenderData wrapper(Object object) {return object instanceof PictureRenderData ? (PictureRenderData) object : Pictures.of(object.toString()).fitSize().create();}public static class Helper {public static void renderPicture(XWPFRun run, PictureRenderData picture) throws Exception {Supplier supplier = picture.getPictureSupplier();byte[] imageBytes = (byte[]) supplier.get();if (null == imageBytes) {throw new IllegalStateException("Can't read picture byte arrays!");} else {PictureType pictureType = picture.getPictureType();if (null == pictureType) {pictureType = PictureType.suggestFileType(imageBytes);}if (null == pictureType) {throw new RenderException("PictureRenderData must set picture type!");} else {PictureStyle style = picture.getPictureStyle();if (null == style) {style = new PictureStyle();}int width = style.getWidth();int height = style.getHeight();if (pictureType == PictureType.SVG) {imageBytes = SVGConvertor.toPng(imageBytes, (float) width, (float) height);pictureType = PictureType.PNG;}if (!isSetSize(style)) {BufferedImage original = BufferedImageUtils.readBufferedImage(imageBytes);width = original.getWidth();height = original.getHeight();if (style.getScalePattern() == WidthScalePattern.FIT) {BodyContainer bodyContainer = BodyContainerFactory.getBodyContainer(((IBodyElement) run.getParent()).getBody());int pageWidth = UnitUtils.twips2Pixel(bodyContainer.elementPageWidth((IBodyElement) run.getParent()));if (width > pageWidth) {double ratio = (double) pageWidth / (double) width;width = pageWidth;height = (int) ((double) height * ratio);}}}InputStream stream = new ByteArrayInputStream(imageBytes);Throwable var25 = null;try {PictureStyle.PictureAlign align = style.getAlign();if (null != align && run.getParent() instanceof XWPFParagraph) {((XWPFParagraph) run.getParent()).setAlignment(ParagraphAlignment.valueOf(align.ordinal() + 1));}XWPFRunWrapper wrapper = new XWPFRunWrapper(run, false);wrapper.addPicture(stream, pictureType.type(), "Generated", Units.pixelToEMU(width), Units.pixelToEMU(height));CTDrawing drawing = run.getCTR().getDrawingArray(0);CTGraphicalObject graphicalobject = drawing.getInlineArray(0).getGraphic();//拿到新插入的图片替换添加CTAnchor 设置浮动属性删除inline属性CTAnchor anchor = ExportUtil.getAnchorWithGraphic(graphicalobject, "Generated",Units.toEMU(width), Units.toEMU(height),//图片大小Units.toEMU(270), Units.toEMU(-70), false);//相对当前段落位置需要计算段落已有内容的左偏移drawing.setAnchorArray(new CTAnchor[]{anchor});//添加浮动属性drawing.removeInline(0);//删除行内属性} catch (Throwable var20) {var25 = var20;throw var20;} finally {if (stream != null) {if (var25 != null) {try {stream.close();} catch (Throwable var19) {var25.addSuppressed(var19);}} else {stream.close();}}}}}}}private static boolean isSetSize(PictureStyle style) {return (style.getWidth() != 0 || style.getHeight() != 0) && style.getScalePattern() == WidthScalePattern.NONE;}}

浮于文字上方的核心代码提取出来放到了工具类里面

public class ExportUtil {/*** @param ctGraphicalObject 图片数据* @param deskFileName 图片描述* @param width 宽* @param height 高* @param leftOffset 水平偏移 left* @param topOffset 垂直偏移 top* @param behind 文字上方，文字下方* @return* @throws Exception*/public static CTAnchor getAnchorWithGraphic(CTGraphicalObject ctGraphicalObject,String deskFileName, int width, int height,int leftOffset, int topOffset, boolean behind) {String anchorXML =""+ ""+ ""+ "" + leftOffset + ""+ ""+ ""+ "" + topOffset + "" +""+ ""+ ""+ ""+ ""+ "";CTDrawing drawing = null;try {drawing = CTDrawing.Factory.parse(anchorXML);} catch (XmlException e) {e.printStackTrace();}CTAnchor anchor = drawing.getAnchorArray(0);anchor.setGraphic(ctGraphicalObject);return anchor;}}

在使用poi-tl导出word时

ConfigureBuilder builder = Configure.builder(); builder.addPlugin('%',new MyPictureRenderPolicy());//把插件注册为新标签类型 XWPFTemplate template = XWPFTemplate.compile(templateIs,builder.build()).render(exportBO);

这样就能把模板里所有前缀为%的图片标签渲染为浮于文字上方

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