randomimgcode.java

EasyJWeb的框架代码

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.*;
/**
 * 验证码图片输出
 * @author 
 *
 */
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;
	}

}