基于struts2+spring+ibatis彩色随机验证码的实现

1、编写生成彩色验证码的Action类:CheckCode.java
package 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