基于Struts2+Spring+Hibernate的彩色验证码的生成

1、编写生成彩色验证码的Action类:CheckCode.java

package com.BBSDemo.struts2.actions;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 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 = 70;int height = 17;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, 17);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struts.xml文件：

<package><action name="checkcode" class="getCheckcode"><result type="stream"><param name="contentType">image/jpeg</param><param name="inputName">inputStream</param></result></action></package>

3、配置applicationContext.xml文件：

<bean name="getCheckcode" class="com.BBSDemo.struts2.actions.CheckCode" />

（注意：这里的getCheckcode必须与struts.xml里的action name＝"key"的属性一致，可以任意取）

4、编写login.jsp：

在login.jsp的前两行：

<%@ page contentType="text/html;charset=UTF-8" language="java"%><%@ taglib prefix="s" uri="/struts-tags"%>

（其中的prefix的属性可以任意取）

然后，添加标签：

<tr> <td><nobr>验证码</nobr></td> <td><nobr> <s:textfield name="checkcode" size="6" /> <img src="checkcode.do" border="0" onclick= "this.src='checkcode.do?d'+(new Date().getTime());" alt="请输入此验证码，如看不清请点击刷新。" style="cursor:pointer" /> </nobr></td></tr>

(注意：checkcode.do?d+)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：

WARN - Error setting valuejava.lang.NumberFormatException: For input string: "1247816320342"at java.lang.NumberFormatException.forInputString(Unknown Source)at java.lang.Integer.parseInt(Unknown Source)at java.lang.Integer.valueOf(Unknown Source)at ognl.OgnlParserTokenManager.makeInt(OgnlParserTokenManager.java:60)at ognl.OgnlParserTokenManager.TokenLexicalActions(OgnlParserTokenManager.java:1684)at ognl.OgnlParserTokenManager.getNextToken(OgnlParserTokenManager.java:1519)at ognl.OgnlParser.jj_ntk(OgnlParser.java:3079)at ognl.OgnlParser.unaryExpression(OgnlParser.java:1081)at ognl.OgnlParser.multiplicativeExpression(OgnlParser.java:973)..........................................

5、同样，附上我的测试结果：

由于不小心把浏览器关了，导致重写了一遍，马上要断网了，所以，有点苍促，可能漏了什么，但就是想不出来，那就先这样了...

 

我将这个“登录与注册功能”代码发到csdn了：http://download.csdn.net/source/1498913