将html网页展示的图表，下载到PPT文档内，以图片的形式展示在PPT内

使用到的工具有：

开发工具：IDEA

报表开发工具：帆软10.0.19

1、针对帆软报表[普通报表]的设置

1.1首先选中在帆软里制作好的报表，选择模板web属性

1.2.选择数据分析模式，添加一个事件设置，该事件应该设置"加载结束"

1.3.在Js脚本里写这段代码：

javascript 复制代码

var node = document.getElementsByClassName('x-table')[0].parentElement;
var message = {
	nodeId: '自定义一个别名',
	nodeInnerHTML: node.innerHTML
};
window.parent.postMessage(message, '*');

--绘制表格及如何将帆软报表展示到html不做过多赘述

给生成PPT方法添加一个按钮事件：

javascript 复制代码

$("#DOWNLOAD").on("click", function () {
        
        //给每个表格设置一个新的ID
        updateTableId();

        var timeBucket = $("#inqu_status-0-timeBucket").val();
        let orderYear = timeBucket.substring(0, 4)
        let orderMonth = timeBucket.substring(4, 6)
        let orderYearC = orderYear + '年'
        let orderMonthC = orderMonth + '月'

        var inInfo = new EiInfo();
        var promises = []; // 存储生成图片的 Promise

		//确保每个table都生成了BASE64编码
        document.querySelectorAll(".html2canvas table").forEach((v, k, p) => {
            var promise = html2canvas(document.querySelector('#' + v.id), {}).then((canvas) => {

                //根据当前id获取tr的数量。1tr假设等于11PX 从而计算出数据表格的高度
                let tableHeight = v.querySelectorAll("tr").length * 11;
                let src = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream"); // 将canvas转换成img的src流
                console.log(v.id, k)
                inInfo.set(v.id, src)
                inInfo.set(v.id + 'Height', tableHeight.toString())
                
            });
            promises.push(promise);
        })


		//所有报表的base64编码都在promises里后，调用后台服务
        Promise.all(promises).then(() => {
            inInfo.set("{{Year}}", `${orderYear}`)
            inInfo.set("{{Month}}", `${orderMonth}`)
            inInfo.set("{{YearC}}", `${orderYearC}`)
            inInfo.set("{{MonthC}}", `${orderMonthC}`)
            inInfo.set("{{YearMonth}}", `${orderYear}${orderMonth}`)
            inInfo.set("{{YearMonthC}}", `${orderYearC}${orderMonthC}`)

            var jsonEi = inInfo.toJSONString(true);
            console.log(jsonEi)
            post(IPLATUI.CONTEXT_PATH + "/DownloadAgree", {"temporaryId": "PM15", "jsonEi": jsonEi});

            // IPLAT.progress($("#result"), false);
        });

        IPLAT.progress($("#result"), false);

        

    })

javascript 复制代码

function updateTableId() {
    var tables = document.querySelectorAll("table[class^='x-table']");
    for (var i = 0; i < tables.length; i++) {
        tables[i].setAttribute("id", "newTableId" + i);
        num = i;
    }
}

调用后台：DownloadAgree，通过该服务，去调用具体实现方法

java 复制代码

package com.baosight.bgdsp.rp.pm;

import com.baosight.iplat4j.core.ei.EiConstant;
import com.baosight.iplat4j.core.ei.EiInfo;
import com.baosight.iplat4j.core.service.soa.XLocalManager;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class DownloadAgree extends HttpServlet{
	@Override
	protected void doGet(HttpServletRequest request, HttpServletResponse response) {
		EiInfo eiInfo = EiInfo.parseJSONString(request.getParameter("jsonEi"));
		String temporaryId = request.getParameter("temporaryId");
		if (temporaryId.equals("PM")) {
			eiInfo.set("response", response);
			eiInfo.set(EiConstant.serviceName, "R07");
			eiInfo.set(EiConstant.methodName, "exportPPT");
			eiInfo = XLocalManager.callNewTx(eiInfo);

		}if (temporaryId.equals("PM15")) {
			eiInfo.set("response", response);
			eiInfo.set(EiConstant.serviceName, "R15");
			eiInfo.set(EiConstant.methodName, "exportPPT");
			eiInfo = XLocalManager.callNewTx(eiInfo);

		}

	}
	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
		doGet(request, response);
	}
}

exportPPT方法：

java 复制代码

public EiInfo exportPPT(EiInfo inInfo) throws IOException {
        HttpServletResponse response = (HttpServletResponse) inInfo.get("response");
        // 创建一个空的演示文稿
        String url = "";
        String os = System.getProperty("os.name").toLowerCase();
        boolean isMacOS = os.contains("mac");
        if (isMacOS) {
            url = PlatApplicationContext.getProperty("项目名." + projectEnv + ".share.template.mac");
        } else {
            url = PlatApplicationContext.getProperty("项目名." + projectEnv + ".share.template");
        }
        String tempName = PlatApplicationContext.getProperty("项目名." + projectEnv + ".share.template.rppm15");
        // 读取模板文件
        //InputStream resource = new ClassPathResource("/Users/apple/Desktop/-job/2022-development/iplat4j/渠道长龄库存压降情况汇报_template.pptx").getInputStream();
        FileInputStream inputStream = new FileInputStream(url + tempName);
//        FileInputStream inputStream = new FileInputStream("E://" + tempName);
        // 根据模板，创建一个新的ppt文档
        XMLSlideShow ppt = new XMLSlideShow(inputStream);
        // 读取模板PPT
        inputStream.close();

        Map<String, String> attr = inInfo.getAttr();
        attr.put("netPrice_2", getReportsToimage());

//        List<XSLFSlide> slides = ppt.getSlides();
        // 得到每页ppt
        XSLFSlide[] slides = ppt.getSlides().toArray(new XSLFSlide[0]);
        // 遍历ppt，填充模板
        for (XSLFSlide slide : slides) {
//            List<XSLFShape> shapes = slide.getShapes();
            XSLFShape[] shapes = slide.getShapes().toArray(new XSLFShape[0]);
            // 遍历每页ppt中待填充的形状组件
            for (XSLFShape shape : shapes) {
                if (shape instanceof XSLFTextShape) {
                    // 替换文本
                    XSLFTextShape textShape = (XSLFTextShape) shape;
                    String textValue = textShape.getText();
                    String shapeName = textShape.getShapeName();
                    boolean flag = false;
                    for (String text : extractContent(textValue)) {
                        if (attr.containsKey(text)) {
                            flag = true;
                            //使用mustache语法替换文字 {{YearC}}营{{MonthC}}销预案会
                            textValue = textValue.replace(text, attr.get(text));
                        }
                    }
                    if (flag && StringUtils.isNotBlank(textValue)) {
                        List<XSLFTextParagraph> paragraphs = textShape.getTextParagraphs();
                        for (XSLFTextParagraph paragraph : paragraphs) {
                            List<XSLFTextRun> textRuns = paragraph.getTextRuns();
                            for (XSLFTextRun textRun : textRuns) {
                                textRun.setText("");
                            }
                        }
                        XSLFTextRun textRun2 = textShape.getTextParagraphs().get(0).getTextRuns().get(0);

                        textRun2.setText(textValue);
                    }
                } else if (shape instanceof XSLFPictureShape) {
                    XSLFPictureShape pictureShape = (XSLFPictureShape) shape;
                    XSLFPictureData pictureData = pictureShape.getPictureData();
                    String imageName = pictureShape.getShapeName();
                    String imageBase64 = attr.get(imageName);
                    if (imageBase64 != null) {
                        byte[] bt = Base64.getDecoder().decode(imageBase64.split(",")[1]);
                        XSLFPictureData idx = ppt.addPicture(bt, PictureData.PictureType.PNG);
                        XSLFPictureShape pic = slide.createPicture(idx);
                        Rectangle2D anchor = pictureShape.getAnchor();
                        //高度取决于数据表格的条数 宽度固定
                        pic.setAnchor(new Rectangle2D.Double(anchor.getX(), anchor.getY(), anchor.getWidth(), anchor.getHeight()));
                        pictureShape.setAnchor(new Rectangle2D.Double(10, 0, 0, 0));
                    }
                }
            }
        }
        String fileName = "PPT名字" + DateUtils.curDateTimeStr14() + ".pptx";
        // 保存PPT文件
        //设置输出文件类型为pptx文件
        response.setContentType(CONTENT_TYPE_OF_PPT);
        response.setHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(fileName, CHARSET_OF_UTF8));
        response.setHeader("Pragma", URLEncoder.encode(fileName, CHARSET_OF_UTF8));
        ServletOutputStream outputStream = response.getOutputStream();
        ppt.write(outputStream);
        outputStream.flush();
        outputStream.close();
        return new EiInfo();

    }

extractContent方法：

java 复制代码

public static List<String> extractContent(String input) {
        List<String> contents = new ArrayList<>();
        int startIndex = input.indexOf("{{");
        while (startIndex != -1) {
            int endIndex = input.indexOf("}}", startIndex);
            if (endIndex != -1) {
                String content = input.substring(startIndex, endIndex + 2);
                contents.add(content);
                startIndex = input.indexOf("{{", endIndex);
            } else {
                break;
            }
        }
        return contents;
    }

getReportsToimage()方法：该方法针对的是：帆软报表的普通报表中，出现非表格报表的处理方法[即：柱状图、折线图等]，通过直接访问帆软链接的方式去获取表格的base64编码。

java 复制代码

private String getReportsToimage() throws IOException {
        String reportAddress = PlatApplicationContext.getProperty("项目名." + projectEnv + ".report.address");
        // 创建HttpClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();

        try {
            // 构造请求URL
            String apiUrl = reportAddress + "/*/netPrice_2.cpt&format=image&extype=JPG";
            // 创建HttpGet请求
            //HttpPost request = new HttpPost(apiUrl);
            System.out.println("apiUrl");
            System.out.println(apiUrl);
            HttpGet httpGet = new HttpGet(apiUrl);
            // 设置请求头部
            httpGet.addHeader("Content-Type", "text/html; charset=utf-8");
            // 发送请求并获取响应
            HttpResponse responsed = httpClient.execute(httpGet);
            // 解析响应数据
            HttpEntity entity = responsed.getEntity();
            // 检查响应是否成功
            if (responsed.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                // 获取Content-Type头部信息
                Header contentTypeHeader = entity.getContentType();
                String contentType = contentTypeHeader.getValue();
                // 获取输入流
                InputStream inStream = entity.getContent();
                ByteArrayOutputStream outputStream_u = new ByteArrayOutputStream();

                // 将图片裁剪为宽60px，高60px
                BufferedImage originalImage = ImageIO.read(inStream);
                BufferedImage croppedImage = originalImage.getSubimage(0, 0, 3560, 1560);

                // 将裁剪后的图片转换成字节数组
                ByteArrayOutputStream outputStream_c = new ByteArrayOutputStream();
                ImageIO.write(croppedImage, "png", outputStream_c);
                byte[] croppedImageBytes = outputStream_c.toByteArray();

                // 将图片数据编码为base64格式
                String base64Image = Base64.getEncoder().encodeToString(croppedImageBytes);
                System.out.println(base64Image);
                String responseBody = EntityUtils.toString(entity);
                // 处理响应数据
                System.out.println(responseBody);
                // 关闭输入流和输出流
                inStream.close();
                outputStream_u.close();
                return "data:image/png;base64," + base64Image;
            } else {
                System.out.println("HTTP请求失败！");
            }


        } catch (PlatException e) {

        }
        return "";
    }

最后，在设置PPT模板的时候，将模板内的图片设置为修改后的别名：newTableIdi