content: /**
   * 
   */
  package org.zeus.common.validator;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Component;
  import org.springframework.web.bind.ServletRequestUtils;
  import org.springframework.web.context.request.ServletWebRequest;
  
  import java.awt.*;
  import java.awt.image.BufferedImage;
  import java.util.Random;
  
  /**
   * 默认的图片验证码生成器
   * @author lizhizhong
   *
   */
  @Component("imageValidateCodeGenerator")
  public class ImageCodeGenerator implements ValidateCodeGenerator {
  
  	/**
  	 * 系统配置
  	 */
  	@Autowired
  	private SecurityProperties securityProperties;
  
      /**
       * 生成图片验证码
       * @param request
       * @return
       */
  	@Override
  	public ImageCode generate(ServletWebRequest request) {
  		int width = ServletRequestUtils.getIntParameter(request.getRequest(), "width",
  				securityProperties.getCode().getImage().getWidth());
  		int height = ServletRequestUtils.getIntParameter(request.getRequest(), "height",
  				securityProperties.getCode().getImage().getHeight());
  		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
  
  		Graphics g = image.getGraphics();
  
  		Random random = new Random();
  
  		g.setColor(getRandColor(200, 250));
  		g.fillRect(0, 0, width, height);
  		g.setFont(new Font("Times New Roman", Font.ITALIC, 20));
  		g.setColor(getRandColor(160, 200));
  		for (int i = 0; i < 155; i++) {
  			int x = random.nextInt(width);
  			int y = random.nextInt(height);
  			int xl = random.nextInt(12);
  			int yl = random.nextInt(12);
  			g.drawLine(x, y, x + xl, y + yl);
  		}
  
  		String sRand = "";
  		for (int i = 0; i < securityProperties.getCode().getImage().getLength(); i++) {
  			String rand = String.valueOf(random.nextInt(10));
  			sRand += rand;
  			g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
  			g.drawString(rand, 13 * i + 6, 16);
  		}
  
  		g.dispose();
  
  		return new ImageCode(image, sRand, securityProperties.getCode().getImage().getExpireIn());
  	}
  	
  	/**
  	 * 生成随机背景条纹
  	 * 
  	 * @param fc
  	 * @param bc
  	 * @return
  	 */
  	private Color getRandColor(int fc, int bc) {
  		Random random = new Random();
  		if (fc > 255) {
  			fc = 255;
  		}
  		if (bc > 255) {
  			bc = 255;
  		}
  		int r = fc + random.nextInt(bc - fc);
  		int g = fc + random.nextInt(bc - fc);
  		int b = fc + random.nextInt(bc - fc);
  		return new Color(r, g, b);
  	}
  
  	public SecurityProperties getSecurityProperties() {
  		return securityProperties;
  	}
  
  	public void setSecurityProperties(SecurityProperties securityProperties) {
  		this.securityProperties = securityProperties;
  	}
  	
  	
  
  }
  