Struts2+Spring2+Hibernate3实现登录

package com.bs.action.common; 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 java.util.Random; import javax.imageio.ImageIO; import javax.servlet.http.HttpServletResponse; import org.apache.struts2.ServletActionContext; import com.bs.action.BasicAction; public class VierfycodeAction extends BasicAction{ private static final long serialVersionUID = -2269414914034390741L; private Random random; private BufferedImage image; private Font font; private int distance; public String getCheckCodeImage(String str, int show, OutputStream output) throws IOException{ random = new Random(); image = new BufferedImage(65,20,BufferedImage.TYPE_3BYTE_BGR); font = new Font("Arial",Font.PLAIN,19); distance = 15; Graphics d = image.getGraphics(); d.setColor(Color.WHITE); d.fillRect(0,0,image.getWidth(),image.getHeight()); d.setColor(new Color(random.nextInt(100)+100,random.nextInt(100)+100,random.nextInt(100)+100)); for (int i = 0; i < 10; i++) { d.drawLine(random.nextInt(image.getWidth()),random.nextInt(image.getHeight()),random.nextInt(image.getWidth()),random.nextInt(image.getHeight())); } d.setColor(Color.BLACK); d.setFont(font); String checkCode = ""; char tmp = 0; int x = -distance; for (int i = 0; i < show; i++) { tmp = str.charAt(random.nextInt(str.length()-1)); checkCode = checkCode + tmp; x = x + distance; d.setColor(new Color(random.nextInt(100)+50,random.nextInt(100)+50,random.nextInt(100)+50)); d.drawString(tmp+"",x,random.nextInt(image.getHeight()-(font.getSize()))+(font.getSize())); } d.dispose(); ImageIO.write(image,"jpeg",output); return checkCode; } public String execute() throws Exception { HttpServletResponse response = ServletActionContext.getResponse(); //ABCDEFGHJKLMNPQRSTUVWXYZ String checkCode = getCheckCodeImage("abcdefghijklmnopqrstuvwxyz123456789",4,response.getOutputStream()); getSession().put("vierfycode", checkCode); return SUCCESS; } }