package?action;

import?java.awt.Color;
import?java.awt.Font;
import?java.awt.Graphics;
import?java.awt.image.BufferedImage;
import?java.io.ByteArrayInputStream;
import?java.io.ByteArrayOutputStream;
import?java.util.Map;

import?javax.imageio.ImageIO;
import?javax.imageio.stream.ImageOutputStream;

import?com.opensymphony.xwork2.ActionContext;
import?com.opensymphony.xwork2.ActionSupport;

public?class?ImageAction?extends?ActionSupport?{
	private?static?final?long?serialVersionUID?=?1L;
	
	private?ByteArrayInputStream?inputStream;
	
	public?String?creatRandomString（）?{
		String?str?=?““;
		for（int?i?=?0;?i?			str?+=?Integer.toString（（new?Double（Math.random（）?*?10））.intValue（））;
		}
		return?str;
	}

	public?Color?createsRandomColor（）?{
		int?r?=?（new?Double（Math.random（）?*?256））.intValue（）;
		int?g?=?（new?Double（Math.random（）?*?256））.intValue（）;
		int?b?=?（new?Double（Math.random（）?*?256））.intValue（）;
		return?new?Color（r?g?b）;
	}
	
	public?BufferedImage?createImage（String?str）?{
		int?width?=?60;
		int?height?=?22;
		BufferedImage?image?=?new?BufferedImage（width?height?BufferedImage.TYPE_INT_RGB）;
		//獲取圖形上下文
		Graphics?g?=?image.getGraphics（）;
		//設定背景色
		g.setColor（Color.WHITE）;
		g.fillRect（0?0?width?height）;
		//畫邊框
		g.setColor（Color.black）;
		g.drawRect（0?0?width?-?1?height?-?1）;
		//將認證碼顯示到圖像中
		g.setFont（new?Font（“Atlantic?Inline“?Font.PLAIN?18））;
		//使用隨便顏色
		g.setColor（this.createsRandomColor（））;
		//將隨機字符串的每個數(shù)字分別寫到圖片上
		g.drawString（Character.toString（str.charAt（0））?8?17）;
		g.drawString（Character.toString（str.charAt（1））?20?17）;
		g.drawString（Character.toString（str.charAt（2））?33?17）;
		g.drawString（Character.toString（str.charAt（3））?45?17）;
		//圖像生效
		g.dispose（）;
		return?image;
	}
	//將圖片以字節(jié)形式寫到InputStream里
	public?ByteArrayInputStream?createInuptStream（）?throws?Exception?{
		//獲取隨機字符串
		String?str?=?this.creatRandomString（）;
		BufferedImage?image?=?this.createImage（str）;
		//將產生的字符串寫入session，供校驗時使用;
		ActionContext?actionContext?=?ActionContext.getContext（）;
		Map?session?=?actionContext.getSession（）;
		session.put（“random“?str）;
		
		ByteArrayOutputStream?output?=?new?ByteArrayOutputStream（）;
		ImageOutputStream?imageOut?=?ImageIO.createImageOutputStream（output）;
		ImageIO.write（image?“JPEG“?imageOut）;
		imageOut.close（）;
		ByteArrayInputStream?input?=?new?ByteArrayInputStream（output.toByteArray（））;
		output.close（）;
		return?input;
	}
	@Override
	public?String?execute（）?throws?Exception?{
		setInputStream（createInuptStream（））;
		return?SUCCESS;
	}
	public?ByteArrayInputStream?getInputStream（）?{
		return?inputStream;
	}

	public?void?setInputStream（ByteArrayInputStream?inputStream）?{
		this.inputStream?=?inputStream;
	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2012-11-23?09:50??Struts2login\
?????文件????????1006??2012-11-23?09:50??Struts2login\.classpath
?????目錄???????????0??2012-11-23?09:50??Struts2login\.myeclipse\
?????文件?????????309??2012-11-23?09:50??Struts2login\.mymetadata
?????文件????????1285??2012-11-23?09:50??Struts2login\.project
?????目錄???????????0??2012-11-23?09:50??Struts2login\SQL\
?????文件?????????923??2012-11-23?09:50??Struts2login\SQL\struts?2login.sql
?????目錄???????????0??2012-11-23?09:50??Struts2login\src\
?????目錄???????????0??2012-11-23?09:50??Struts2login\src\action\
?????文件????????2900??2012-11-23?09:50??Struts2login\src\action\ImageAction.java
?????文件?????????639??2012-11-23?09:50??Struts2login\src\action\LoginAction-validation.xml
?????文件????????1100??2012-11-23?09:50??Struts2login\src\action\LoginAction.java
?????文件????????1739??2012-11-23?09:50??Struts2login\src\action\RegisterAction-validation.xml
?????文件????????2032??2012-11-23?09:50??Struts2login\src\action\RegisterAction.java
?????目錄???????????0??2012-11-23?09:50??Struts2login\src\biz\
?????文件?????????758??2012-11-23?09:50??Struts2login\src\biz\Users.java
?????目錄???????????0??2012-11-23?09:50??Struts2login\src\dao\
?????文件????????1134??2012-11-23?09:50??Struts2login\src\dao\DbConnection.java
?????文件????????2218??2012-11-23?09:50??Struts2login\src\dao\DbService.java
?????文件?????????958??2012-11-23?09:50??Struts2login\src\struts.xml
?????目錄???????????0??2012-11-23?09:50??Struts2login\WebRoot\
?????文件?????????837??2012-11-23?09:50??Struts2login\WebRoot\index.jsp
?????文件?????????778??2012-11-23?09:50??Struts2login\WebRoot\login.jsp
?????文件?????????416??2012-11-23?09:50??Struts2login\WebRoot\login_success.jsp
?????目錄???????????0??2012-11-23?09:50??Struts2login\WebRoot\meta-INF\
?????文件??????????36??2012-11-23?09:50??Struts2login\WebRoot\meta-INF\MANIFEST.MF
?????文件????????2444??2012-11-23?09:50??Struts2login\WebRoot\register.jsp
?????文件????????1178??2012-11-23?09:50??Struts2login\WebRoot\register_success.jsp
?????目錄???????????0??2012-11-23?09:50??Struts2login\WebRoot\WEB-INF\
?????目錄???????????0??2012-11-23?09:50??Struts2login\WebRoot\WEB-INF\classes\
?????目錄???????????0??2012-11-23?09:50??Struts2login\WebRoot\WEB-INF\classes\action\
............此處省略20個文件信息