Java-BufferedImage动态生成一个表格图片

需求：一个word模板，里边有一个表格，需要根据需求动态填充数据，需要转成pdf，但是我发现转成pdf的方式并不方便，想着还不如将动态的部分生成图片，然后由前端整合其他部分用于展示，也满足了需求。

生成完之后的图：（ps:字体大小和颜色啥的都可以自己变动，此仅仅是完成了功能）

public String actionExportReport(HttpServletRequest request, List<Map<String, String>> mapList,
      Double totalAmount) {
    //中间核心值
    ArrayList<List<String>> list = new ArrayList<>();
    mapList.stream().forEach(e -> {
      Collection<String> stringList = e.values();
      List<String> listString = new ArrayList<>(stringList);
      list.add(listString);
    });
    //表格第一行的名称
    ArrayList<List<String>> listNew = new ArrayList<>();
    List<String> titleList = new ArrayList<>();
    titleList.add("名称");
    titleList.add("规格");
    titleList.add("单位");
    titleList.add("单价");
    titleList.add("数量");
    titleList.add("金额(元)");
    titleList.add("备注");
    listNew.add(titleList);
    listNew.addAll(list);
    //编写最后一行的数值统计
    List<String> statisticsList = new ArrayList<>();
    statisticsList.add("合计");
    statisticsList.add("大写");
    String amount = String.format("%.2f", totalAmount);
    statisticsList.add(numberUppercase.toChinese(amount));
    statisticsList.add("");
    statisticsList.add("金额");
    String amountString = "￥" + amount + "元";
    statisticsList.add(amountString);
    listNew.add(statisticsList);
	//核心代码
    BufferedImage bufferedImage = ImageQrCoderShare.wordPngBase(listNew);
    String shareImageUrl;
    if (null != bufferedImage) {
      //存储服务器代码，忽略
      String urlPath = "/images/contract/info";
      shareImageUrl = getImageUrl(bufferedImage, request,111L, urlPath);
    } else {
      shareImageUrl = "";
    }
    return shareImageUrl;

  }

public static BufferedImage wordPngBase(ArrayList<List<String>> list) {
    //封装了画图类 用于画图初始化，设置图标题、表格行列数
    BufferedImage bufferedImage = ImageQrCoderShare
        .drawImage("一、买卖物名称、数量、价款（货物采购计划单）：", list.size());
    Graphics2D graphics2D = (Graphics2D) bufferedImage.getGraphics();
    //继续向初始化后的graphics2D，存储刚处理的数据内容
    Font font;
    int colwidth = ((ImageQrCoderShare.imageWidth - 20) / ImageQrCoderShare.totalcol);
    for (int n = 0; n < list.size(); n++) {
      for (int l = 0; l < list.get(n).size(); l++) {
      	//封装的字体类，可以直接new就行
        font = definedFontPF.deriveFont(Font.PLAIN, 16);
        graphics2D.setFont(font);
        graphics2D.setColor(Color.BLACK);
        //循环输出，根据表格设置的列设置宽度，也就是起始点
        graphics2D.drawString(
            String.valueOf(list.get(n).get(l)), ImageQrCoderShare.startWidth + colwidth * l + 5,
            ImageQrCoderShare.startHeight + ImageQrCoderShare.rowheight * (n + 2) - 10);
      }
    }
    return bufferedImage;
  }

//封装了画图类 用于画图初始化，设置图标题、表格行列数
public static BufferedImage drawImage(String title, int totalRow) {

    // 图片高度
    int imageHeight = totalRow * rowheight + 50;
    // 单元格宽度
    int colwidth = ((imageWidth - 20) / totalcol);

    BufferedImage bufferedImage = new BufferedImage(imageWidth, imageHeight,
        BufferedImage.TYPE_INT_RGB);

    Graphics2D graphics2D = (Graphics2D) bufferedImage.getGraphics();

    graphics2D.setColor(Color.WHITE);
    graphics2D.fillRect(0, 0, imageWidth, imageHeight);
    graphics2D.setColor(new Color(220, 240, 240));
    for (int j = 0; j < totalRow; j++) {
      graphics2D.setColor(Color.black);
      graphics2D
          .drawLine(startWidth, startHeight + (j + 1) * rowheight, startWidth + colwidth * totalcol,
              startHeight + (j + 1) * rowheight);
    }
    // 画竖线
    for (int k = 0; k < totalcol + 1; k++) {
      graphics2D.setColor(Color.black);
      graphics2D
          .drawLine(startWidth + k * colwidth, startHeight + rowheight, startWidth + k * colwidth,
              startHeight + rowheight * totalRow);
    }
    // 设置字体
    Font font = definedFontPF.deriveFont(Font.PLAIN, 24);
    graphics2D.setFont(font);
    graphics2D.setColor(Color.black);
    // 写标题
    graphics2D.drawString(title, startWidth, startHeight + rowheight - 10);
    return bufferedImage;
  }

标签：graphics2D,Java,表格,ArrayList,BufferedImage,bufferedImage,add,new,titleList
来源： https://blog.csdn.net/huo065000/article/details/114920464