loginaction.java

用ajax在ssh框架下发挥

//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.1.1/xslt/JavaClass.xsl

package com.news.struts.action;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import org.springframework.beans.factory.BeanFactory;

import com.news.service.IloginService;
import com.news.struts.form.LoginForm;
import com.news.utils.Check;
import com.news.utils.GetXml;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

public class LoginAction extends DispatchAction {

	public ActionForward login(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,
		HttpServletResponse response) {
		LoginForm loginForm = (LoginForm) form;
		response.setContentType("text/html;charset=GBK");
		
		BeanFactory factory = GetXml.getXml();
		IloginService login = (IloginService)factory.getBean("userinfoServiceLogin");
		
		String str = login.validateUser(loginForm,request.getSession());
		loginForm.setPassword(null);
		return mapping.findForward(str);
	}
	
	public ActionForward check(
			ActionMapping mapping,
			ActionForm form,
			HttpServletRequest request,
			HttpServletResponse response) throws IOException {
			LoginForm loginForm = (LoginForm) form;
			response.setHeader("Pragma","No-cache");
			response.setHeader("Cache-Control","no-cache");
			response.setDateHeader("Expires", 0);
			response.setContentType("image/jpeg");
			
			int width=60, height=20;
			BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

			Graphics g = image.getGraphics();

			Random random = new Random();
			
			Check check = new Check();
			
			g.setColor(check.getRandColor(200,250));
			g.fillRect(0, 0, width, height);

			g.setFont(new Font("Times New Roman",Font.PLAIN,18));

			g.setColor(check.getRandColor(160,200));
			for (int i=0;i<155;i++)
			{
			 int x = random.nextInt(width);
			 int y = random.nextInt(height);
			        int xl = random.nextInt(12);
			        int yl = random.nextInt(12);
			 g.drawLine(x,y,x+xl,y+yl);
			}
			String sRand="";
			for (int i=0;i<4;i++){
			    String rand=String.valueOf(random.nextInt(10));
			    sRand+=rand;
			    g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
			    g.drawString(rand,13*i+6,16);
			}
			request.getSession().setAttribute("rand",sRand);
			
			ServletOutputStream out = response.getOutputStream(); 
			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); 
			encoder.encode(image);
			out.close();
			return null;
		}

}