html代码 转换成图片（偶尔会生成空白）

package com.by;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;

public class CreatPicByHtml {
    public static void main(String[] args) {
        String html = getHtml();
        OutputStream fos;
        try{
            String htmlPath = "D:\\tiantianbaiying\\by_timer\\src\\test\\com\\by\\ysd.html";
            String pngPath = "D:\\tiantianbaiying\\by_timer\\src\\test\\com\\by\\ysd.png";
            fos = new FileOutputStream(htmlPath);
            fos.write(html.getBytes("UTF-8"));
            fos.flush();
            fos.close();
            System.out.println("成功");
            createPic(htmlPath,pngPath);
        }catch (Exception e){
            e.printStackTrace();
            System.out.println("失败");
        }finally {

        }
//        createPic();
    }

    public static String getHtml(){
        //编写html
        StringBuffer html = new StringBuffer();
        html.append("\n" +
                "" +
                "\t\n" +
                "\t\t
工程部验收单
\n" +
                "\t\t
\n" +
                "\t\t\t
\n" +
                "\t\t\t订单编号：BN2018070309253872604

\n" +
                "\t\t\t店铺ID：2454

\n" +
                "\t\t\t店铺名称：宁波印象城Ningbo In City

\n" +
                "\t\t\t施工地址：上海市闵行区莘庄公路6088号龙之梦商务楼2楼

\n" +
                "\t\t\t报修内容：

\n" +
                "\t\t\t
\n" +
                "\t\t\t\t立体发光字整体不亮，报修数量10个，需紧急维修\n" +
                "\t\t\t
\n" +
                "\t\t\t
\n" +
                "\t\t
\n" +
                "\t\t
\n" +
                "\t\t
\n" +
                "\t\t\t上门师傅姓名：张梓晨\n" +
                "\t\t
\n" +
                "\t    
\n" +
                "\t    
 \n" +
                "\t\t\t
店铺验收结果：
\n" +
                "\t\t\t
\n" +
                "\t\t\t
3454 屈臣氏浦东店
\n" +
                "\t\t
\n" +
                "\t\n" +
                "");
        System.out.println(html);
        return html.toString();
    }

    public static void createPic(String htmlPath,String pngPath){

        //转换成图片
        try {
//            JEditorPane ed = new JEditorPane("file:///" + "C:\\Users\\Administrator\\Desktop\\ysd.html");
            JEditorPane ed = new JEditorPane("file:///" + htmlPath);
            ed.setSize(655,820);
            BufferedImage image = new BufferedImage(ed.getWidth(), ed.getHeight(),
                    BufferedImage.TYPE_INT_ARGB);

            //paint the editor onto the image
            SwingUtilities.paintComponent(image.createGraphics(),
                    ed,
                    new JPanel(),
                    0, 0, image.getWidth(), image.getHeight());
            //save the image to file
//            ImageIO.write((RenderedImage)image, "png", new File("C:\\Users\\Administrator\\Desktop\\html1.png"));
            ImageIO.write((RenderedImage)image, "png", new File(pngPath));
            System.out.println("完成了啊？");
        }catch (Exception e){
            e.printStackTrace();
            System.out.println("报错了？");
        }

    }
}