randomimgcode.java

如果遇到MD5加密文件

package com.easyjf.web.tools;

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

import com.easyjf.web.ActionContext;
import com.easyjf.web.IWebAction;
import com.easyjf.web.Module;
import com.easyjf.web.Page;
import com.easyjf.web.WebForm;

import java.awt.image.*;
import javax.imageio.*;

public class RandomImgCode implements IWebAction{
	public Page execute(WebForm form, Module module)throws Exception {		
		HttpServletRequest request=ActionContext.getContext().getRequest();
        HttpServletResponse response=ActionContext.getContext().getResponse();
		response.setContentType("image/jpeg");
		ImageCode image=new ImageCode();
		response.setHeader("Pragma","No-cache");
		response.setHeader("Cache-Control","no-cache");
		response.setDateHeader("Expires", 0);		
		try{
//		 输出图象到页面		
		BufferedImage img=image.creatImage();
		request.getSession().setAttribute("rand",image.getSRand());		
		ImageIO.write(img, "JPEG", response.getOutputStream());		
		response.getOutputStream().flush();
		response.getOutputStream().close();
		}
		catch(Exception e)
		{
			System.out.println("错误:"+e);
		}		
		return null;
	}

}