package?demo;



import?java.awt.Color;
import?java.awt.Font;
import?java.awt.Graphics;
import?java.awt.image.BufferedImage;
import?java.io.IOException;
import?java.io.OutputStream;

import?javax.imageio.ImageIO;
import?javax.servlet.ServletException;
import?javax.servlet.http.HttpServlet;
import?javax.servlet.http.HttpServletRequest;
import?javax.servlet.http.HttpServletResponse;
import?javax.servlet.http.HttpSession;

import?org.apache.taglibs.standard.tag.common.core.OutSupport;

public?class?CheckCodeServlet?extends?HttpServlet{
	@Override
	protected?void?doGet（HttpServletRequest?req?HttpServletResponse?resp）
			throws?ServletException?IOException?{
		//?TODO?Auto-generated?method?stub
	//	super.doGet（req?resp）;
	resp.setContentType（“image/jpeg“）;
	OutputStream?out?=?resp.getOutputStream（）;
	resp.setHeader（“programa“?“no-cache“）;
	resp.setDateHeader（“Expires“?0）;
	BufferedImage?image?=?new?BufferedImage（50?18?BufferedImage.TYPE_INT_RGB）;
	Graphics?g?=?image.getGraphics（）;
	g.setColor（Color.LIGHT_GRAY）;
	g.fillRect（0?0?50?18）;
	g.setColor（Color.LIGHT_GRAY）;
	g.fillRect（0?0?50?18）;
	String?str?=?“0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ“;
	String?code?=?““;
	for（int?i=0;i<4;i++）
	{
		int?k?=?（int）（Math.random（）*36）;
		char?c?=?str.charAt（k）;
		code+=c;
	}
	
	
	HttpSession?session?=?req.getSession（）;
	session.setAttribute（“code“?code）;
	g.setColor（Color.BLACK）;
	Font?font?=?new?Font（“DIALOG“?Font.ITALIC?15）;
	g.setFont（font）;
	g.drawString（code?3?15）;
	ImageIO.write（image“jpeg“out）;
	out.flush（）;
	out.close（）;
	
	}
	@Override
	protected?void?doPost（HttpServletRequest?req?HttpServletResponse?resp）
			throws?ServletException?IOException?{
		//?TODO?Auto-generated?method?stub
	//	super.doPost（req?resp）;
	doGet（req?resp）;
	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-03-12?23:05??Demo\
?????文件?????????460??2017-03-12?23:14??Demo\.classpath
?????目錄???????????0??2017-03-12?23:05??Demo\.myeclipse\
?????文件?????????285??2017-03-12?23:05??Demo\.mymetadata
?????文件????????1410??2017-03-12?23:08??Demo\.project
?????目錄???????????0??2017-03-12?23:05??Demo\.settings\
?????文件?????????500??2017-03-12?23:05??Demo\.settings\.jsdtscope
?????文件?????????330??2017-03-12?23:05??Demo\.settings\org.eclipse.jdt.core.prefs
?????文件??????????49??2017-03-12?23:05??Demo\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件???????????6??2017-03-12?23:05??Demo\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????目錄???????????0??2017-03-12?23:06??Demo\src\
?????目錄???????????0??2017-03-12?23:07??Demo\src\demo\
?????文件????????1839??2017-03-12?23:07??Demo\src\demo\CheckCodeServlet.java
?????文件????????3199??2017-03-13?23:35??Demo\src\demo\LoginServlet.java
?????目錄???????????0??2017-03-13?00:57??Demo\WebRoot\
?????文件?????????695??2017-03-13?23:08??Demo\WebRoot\error.html
?????文件?????????834??2017-03-12?23:05??Demo\WebRoot\index.jsp
?????文件????????1128??2017-03-13?09:17??Demo\WebRoot\login.html
?????目錄???????????0??2017-03-12?23:05??Demo\WebRoot\meta-INF\
?????文件??????????36??2017-03-12?23:05??Demo\WebRoot\meta-INF\MANIFEST.MF
?????目錄???????????0??2017-03-12?23:05??Demo\WebRoot\WEB-INF\
?????目錄???????????0??2017-03-12?23:14??Demo\WebRoot\WEB-INF\classes\
?????目錄???????????0??2017-03-12?23:14??Demo\WebRoot\WEB-INF\classes\demo\
?????文件????????2917??2017-03-12?23:14??Demo\WebRoot\WEB-INF\classes\demo\CheckCodeServlet.class
?????文件????????3798??2017-03-13?23:35??Demo\WebRoot\WEB-INF\classes\demo\LoginServlet.class
?????目錄???????????0??2017-03-12?23:05??Demo\WebRoot\WEB-INF\lib\
?????文件?????????886??2017-03-12?23:09??Demo\WebRoot\WEB-INF\web.xml
?????文件??????872303??2013-10-23?23:45??mysql-connector-java-5.1.27-bin.jar
?????文件?????????224??2017-03-14?00:30??mysql數(shù)據(jù)庫代碼.txt