addphotoservlet.java

jsp + servlete + jdbc开的管理系统

package hbu.david.cmc.servlet;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import hbu.david.cmc.bean.*;
import hbu.david.cmc.http.ServletEncoding;
import hbu.david.cmc.work.*;
import hbu.david.cmc.util.*;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 * Servlet implementation class for Servlet: AddPhotoServlet
 * 
 */
public class AddPhotoServlet extends hbu.david.cmc.http.MyHttpServlet implements
		javax.servlet.Servlet {
	static final long serialVersionUID = 1L;

	/*
	 * (non-Java-doc)
	 * 
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public AddPhotoServlet() {
		super();
	}

	@Override
	public void doExecute(HttpServletRequest request,
			HttpServletResponse response) throws IOException, ServletException {
		// TODO Auto-generated method stub
		ServletEncoding.setEncoding(request, response);
		//初始化，获取输入表单的列表
		List<FileItem> list=FileUploadUtil.init(request, response);
		//对输入表单的列表进行过滤
		Map<String,String> mapField=FileUploadUtil.getField(list);		
		Map<String,FileItem> mapFile=FileUploadUtil.getFile(list);
		//创建图片保存路径
		File path=FileUtil.changePathToAbsol(request, "/upImages/"+((UserInfo)request.getSession().getAttribute("userInfo")).getUsername()+"/"+mapField.get("categoryId"));
		//获取图片信息映射
		Map<String,String> mapFilePath=FileUploadUtil.saveAs(request,mapFile, path);		
		
		if(StringUtil.isStringEmpty(mapField.get("photoName"))||StringUtil.isStringEmpty(mapFilePath.get("photoUrl"))||StringUtil.isStringEmpty(mapField.get("categoryId"))){
			request.setAttribute("errorMessage", "不允许有空数据！");
			request.setAttribute("returnUrl", "addPhoto.jsp");
			request.getRequestDispatcher("error.jsp").forward(request, response);
		}else{
			Photo photo=new Photo();
			photo.setName(mapField.get("photoName"));
			photo.setUrl(mapFilePath.get("photoUrl"));
			photo.setCategoryId(Integer.parseInt(mapField.get("categoryId")));
			boolean ok=PhotoBean.addPhoto(photo);
			if(ok){
				request.setAttribute("errorMessage", "添加成功！");
				request.setAttribute("returnUrl", "GetPhotosServlet?categoryId="+photo.getCategoryId());
				request.getRequestDispatcher("error.jsp").forward(request, response);
			}else{
				request.setAttribute("errorMessage", "添加失败！");
				request.setAttribute("returnUrl", "addPhoto.jsp");
				request.getRequestDispatcher("error.jsp").forward(request, response);
			}
		}
	}
}