java仿Servlet生成验证码实例详解-创新互联

java仿Servlet生成验证码实例详解

在成都做网站、网站建设中从网站色彩、结构布局、栏目设置、关键词群组等细微处着手，突出企业的产品/服务/品牌，帮助企业锁定精准用户，提高在线咨询和转化，使成都网站营销成为有效果、有回报的无锡营销推广。创新互联建站专业成都网站建设十多年了，客户满意度97.8%，欢迎成都创新互联客户联系。

实现原理：使用BufferedImage对象的Graphics来进行绘制，然后输出成一张图片进行保存

实现代码及详解:

public class validateCode{

  private static Random rand = new Random();

  public static void main(String[] args){
    int val1 = rand.nextInt(9);
    int val2 = rand.nextInt(9);
    int val3 = rand.nextInt(9);
    int val4 = rand.nextInt(9);
    String val = val1 + " " + val2 + " " + val3 + " " + val4'
    BufferedImage buf = drawImage(val);
    //将最终的图片保存到D：//cheng.png下
    ImageIO.write(buf,"png",new File("D://cheng.png");
  }

  public static BufferedImage drawImage(String code){
    int height = 30;
    int width = 60;
    BufferedImage buf = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
    Graphics2D gs = buf.createGraphics();
    gs.setBackground(Color.black);
    gs.drawRect(0,0,width,height); 

    //绘制随机干扰线
    int total = 100;
    drawRandLine(gs,total);

    //绘制验证码
    Font font = new Font("行楷",Font.BOLD,20);
    gs.setFont(font);
    gs.setColor(getRandColor(155,255));
    gs.drawString(code,5,20);

    return buf;
  }

  public static void drawRandLine(Graphics2D gs,int total){

    for(int i=0; i            

            文章题目：java仿Servlet生成验证码实例详解-创新互联            

            网站地址：http://bzwzjz.com/article/djshhh.html