关于画图问题BufferedImage

[yxwd315]

int width = 200;
int height = 100;
BufferedImage image1 = new BufferedImage(width, height,
BufferedImage.TYPE_INT_ARGB);
// 获取图像
Graphics g1 = image1.getGraphics();
// 今天天气
BufferedImage img = ImageHelper.getImage("/pics/a" + w.getImg1()
+ ".gif");
g1.drawImage(img, 20, 27, null);
g1.setColor(new Color(21, 111, 255));
g1.drawString(w.getCity(), 32, 20);
g1.drawString("今天", 100, 20);
g1.setColor(new Color(0, 0, 0));
g1.drawString(w.getTemp1(), 100, 45);
g1.drawString(w.getImg_title_single(), 100, 65);
g1.drawString(w.getWind1(), 100, 84);
ImageIO.write(image1, "png",
new File("D://" + cswc.getIdByCity(w.getCity()) + "-1.png"));
这是我写的生成天气预报图片的代码，已经成功生成，代码中的参数都能取到，问题是，有什么方法能不能让他生成后的图片同比例缩小或放大而不变模糊，图片中的字体有些小，能不能设置放大来？