jsp登陆验证码生成源代码，javaimportjava.awt.image.*;importjavax.servlet.*;importjavax.servlet.http.*;importjavax.imageio.*;importcom.sun.image.codec.jpeg.*;importcom.sun.image.codec.jpeg.JPEGCodec;publicclassBuildImageServletextendsHttpServlet{privateRandomgenerator=newRandom();privateColorgetRandColor(