java 怎么配置xml将图片链接换到xml里去

file.xml 为配置文件（win 7 平台）

 <?xml version="1.0" encoding="UTF-8"?>
<files>
    <file_first>E:\\1.jpg</file_first>
    <file_second>E:\\2.jpg</file_second>
    <file_out>E:\\out1.jpg</file_out>
</files>

 try {
            SAXReader reader = new SAXReader();
            Document document = reader.read(new File("E:\\file.xml"));
            Element root = document.getRootElement();
            Element file_first = root.element("file_first");
            Element file_second = root.element("file_second");
            Element file_out = root.element("file_out");

            // 读取第一张图片
            File fileOne = new File(file_first.getText());
            BufferedImage ImageOne = ImageIO.read(fileOne);
            int width = ImageOne.getWidth();// 图片宽度
            int height = ImageOne.getHeight();// 图片高度
            // 从图片中读取RGB
            int[] ImageArrayOne = new int[width * height];
            ImageArrayOne = ImageOne.getRGB(0, 0, width, height, ImageArrayOne,
            0, width);
            // 对第二张图片做相同的处理
            File fileTwo = new File(file_second.getText());
            BufferedImage ImageTwo = ImageIO.read(fileTwo);
            int[] ImageArrayTwo = new int[width * height];
            ImageArrayTwo = ImageTwo.getRGB(0, 0, width, height, ImageArrayTwo,
            0, width);
            // 生成新图片
            // BufferedImage ImageNew = new BufferedImage(width * 2, height,
            // BufferedImage.TYPE_INT_RGB);
            BufferedImage ImageNew = new BufferedImage(width, height*2,
            BufferedImage.TYPE_INT_RGB);
            ImageNew.setRGB(0, 0, width, height, ImageArrayOne, 0, width);// 设置左半部分的RGB
            // ImageNew.setRGB(width, 0, width, height, ImageArrayTwo, 0, width);// 设置右半部分的RGB
            // ImageNew.setRGB(0, height, width, ImageOne.getHeight()+ImageTwo.getHeight(), ImageArrayTwo, 0, width);// 设置右半部分的RGB
            ImageNew.setRGB(0, height, width, height, ImageArrayTwo, 0, width);// 设置右半部分的RGB
            System.out.println("已经合成图片");
            File outFile = new File(file_out.getText());
            ImageIO.write(ImageNew, "jpg", outFile);// 写图片
            } catch (Exception e) {
            e.printStackTrace();
            }
            }