.jsp和servlet验证码
packageCls;importjava.awt.Color;importjava.awt.Font;importjava.awt.Graphics;importjava.awt.Graphics2D;importjava.awt.image.BufferedImage;importjava.io.IOException;importjava.util.Random;importjavax.servlet.ServletOutputStream;importjavax.servlet.http.HttpServlet;importjavax.se
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