Java随机生成中文汉字

Java随机生成中文汉字
/**
* 原理是从汉字区位码找到汉字。在汉字区位码中分高位与底位， 且其中简体又有繁体。位数越前生成的汉字繁体的机率越大。
* 所以在本例中高位从171取，底位从161取， 去掉大部分的繁体和生僻字。但仍然会有！！
*
*/
@Test
public void create() throws Exception {
String str = null;
int hightPos, lowPos; // 定义高低位
Random random = new Random();
hightPos = (176 + Math.abs(random.nextInt(39)));//获取高位值
lowPos = (161 + Math.abs(random.nextInt(93)));//获取低位值
byte[] b = new byte[2];
b[0] = (new Integer(hightPos).byteValue());
b[1] = (new Integer(lowPos).byteValue());
str = new String(b, "GBk");//转成中文
System.err.println(str);
}

/**
* 旋转和缩放文字
* 必须要使用Graphics2d类
*/
public void trans(HttpServletRequest req, HttpServletResponse resp) throws Exception{
int width=88;
int height=22;
BufferedImage img = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
Graphics g = img.getGraphics();
Graphics2D g2d = (Graphics2D) g;
g2d.setFont(new Font("黑体",Font.BOLD,17));
Random r = new Random();
for(int i=0;i<4;i++){
String str = ""+r.nextInt(10);
AffineTransform aff = new AffineTransform();
aff.rotate(Math.random(),i*18,height-5);
aff.scale(0.6+Math.random(), 0.6+Math.random());
g2d.setTransform(aff);
g2d.drawString(str,i*18,height-5);
System.err.println(">:"+str);
}
g2d.dispose();
ImageIO.write(img, "JPEG",resp.getOutputStream());
}