1、编写生成彩色验证码的Action类:CheckCode.javapackage com.dong.product.action.system;import java.awt.BasicStroke; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.geom.AffineTransform; import java.awt.geom.Line2D; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.util.Random; import javax.imageio.ImageIO; import javax.imageio.stream.ImageOutputStream; import com.opensymphony.xwork2.Action; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class CheckCode extends ActionSupport { /** * */private static final long serialVersionUID = -5314852251957774605L;private ByteArrayInputStream inputStream; private Color getRandColor(int s, int e) { Random random = new Random(); if (s > 255) s = 255; if (e > 255) e = 255; int r = s + random.nextInt(e - s); int g = s + random.nextInt(e - s); int b = s + random.nextInt(e - s); return new Color(r, g, b); } public String execute() throws Exception { // 在内在中创建图象 int width = 80; int height = 20; BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = image.getGraphics(); Graphics2D g2d=(Graphics2D)g; Random random = new Random(); Font mFont = new Font("华文宋体", Font.BOLD, 20); g.setColor(getRandColor(200, 250)); g.fillRect(0, 0, width, height); g.setFont(mFont); g.setColor(getRandColor(180, 200)); //画随机的线条 for (int i = 0; i < 130; i++) { int x = random.nextInt(width - 1); int y = random.nextInt(height - 1); int x1 = random.nextInt(6) + 1; int y1 = random.nextInt(12) + 1; BasicStroke bs=new BasicStroke(2f,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL); Line2D line=new Line2D.Double(x,y,x+x1,y+y1); g2d.setStroke(bs); g2d.draw(line); } String sRand=""; //输出随机的验证文字 int itmp=0; for(int i=0;i<4;i++){ if(random.nextInt(2)==1){ itmp=random.nextInt(26)+65; //生成A~Z的字母 }else{ itmp=random.nextInt(10)+48; //生成0~9的数字 } char ctmp=(char)itmp; sRand+=String.valueOf(ctmp); Color color=new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)); g.setColor(color); /****随机缩放文字并将文字旋转指定角度**/ //将文字旋转指定角度 Graphics2D g2d_word=(Graphics2D)g; AffineTransform trans=new AffineTransform(); trans.rotate(random.nextInt(45)*3.14/180,15*i+10,6); //缩放文字 float scaleSize=random.nextFloat()+0.5f; if(scaleSize<0.8 || scaleSize>1.1f) scaleSize=1f; trans.scale(scaleSize, scaleSize); g2d_word.setTransform(trans); /************************/ g.drawString(String.valueOf(ctmp),15*i+10,14); } ActionContext.getContext().getSession().put("randCheckCode", sRand); g.dispose(); ByteArrayInputStream input=null; ByteArrayOutputStream output = new ByteArrayOutputStream(); try{ ImageOutputStream imageOut = ImageIO.createImageOutputStream(output); ImageIO.write(image, "JPEG", imageOut); imageOut.close(); input = new ByteArrayInputStream(output.toByteArray()); }catch(Exception e){ System.out.println("验证码图片产生出现错误："+e.toString()); } this.setInputStream(input); return Action.SUCCESS; } public void setInputStream(ByteArrayInputStream inputStream) { this.inputStream = inputStream; } public ByteArrayInputStream getInputStream() { return inputStream; } }
2 配置bean.xml文件
<bean id="getCheckCode" class="com.dong.product.action.system.CheckCode"
scope="prototype" />
3 注册页面 register.html(生成的静态页面)
<tr> <td colspan="2" align="center"> <DIV id="register"> <DIV id="name"> <DIV class=text id=loginid_info_check>验证码</DIV> <DIV class=redstar>*</DIV> </DIV> <DIV class="input"> <INPUT id="login_id" maxLength="20" size="20" name="user.checkCode"> <img src="${request.getContextPath()}/user/checkCode.htm?d" class="_valign" align="bottom" onClick="this.src=this.src+'?'"> <span id="code_tip" class="color_f60"> 看不清楚,请单击图片更换一张</span> </DIV> </DIV></td> </tr>注意： <img src="${request.getContextPath()}/user/checkCode.htm?d" class="_valign" align="bottom" onClick="this.src=this.src+'?'">
这里的?后面有个d,可以是别的东西，但最好是字母，因为如果不加这个，会出现一堆错误。
4 struts.xml<action name="checkCode" class="getCheckCode"><result type="stream"><param name="contentType">image/jpeg</param><param name="inputName">inputStream</param></result></action>
5、完成
