showimage.java

网上商城代码

package com.fendou.platform;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;

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

import com.fendou.dao.GoodsManage;
import com.fendou.exception.GoodsException;
import com.fendou.util.ValidateLogin;
import com.fendou.vo.Goods;

public class ShowImage extends HttpServlet {

	
	public ShowImage() {
		super();
	}

	
	public void destroy() {
		super.destroy(); 
		
	}
	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request,response);
		
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		//验证用户是否登录
		boolean isLogin=ValidateLogin.checkManage(request);
		if(!isLogin){
			response.sendRedirect("login.jsp");
		}		
		String goodsID=request.getParameter("goodsID");
		GoodsManage goodsManage =new GoodsManage();		
		try {			
			Goods goods=goodsManage.getGoodsPicture(Integer.parseInt(goodsID));			
			response.setContentType("image/*;charset=GB2312");
			int i=goods.getGoodsPicture().available();
			byte data[]=new byte[i];
			ServletOutputStream out=response.getOutputStream();			
			InputStream in=goods.getGoodsPicture();
			in.read(data);
			in.close();
			out.write(data);
			out.flush();
			out.close();			
		} catch (GoodsException e) {
			System.out.println(e);
			request.getRequestDispatcher("error.jsp").forward(request, response);
		}		
	}	
	public void init() throws ServletException {
	
	}

}