这是一个后台管理程序的DEMO。具有管理员管理、图片上传管理功能。

package com.servlet; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.jsp.JspFactory; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.PageContext; import java.io.*; import com.jspsmart.upload.SmartUpload; import com.jspsmart.upload.SmartUploadException; import com.dao.AdminCrtl; import com.model.AdminInfo; public class Admin_UpdateServlet extends HttpServlet { /** * */ private static final long serialVersionUID = 8272684420813629689L; /** * Constructor of the object. */ public Admin_UpdateServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //初始化上传 SmartUpload smartupload=new SmartUpload(); JspFactory fac=JspFactory.getDefaultFactory(); PageContext pageContext=fac.getPageContext(this, request, response, null, false,JspWriter.DEFAULT_BUFFER, true); smartupload.initialize(pageContext) ; // 初始化上传 try { smartupload.upload() ; } catch (SmartUploadException e) { // TODO Auto-generated catch block e.printStackTrace(); } // 准备上传 //管理员用例 AdminInfo ai = new AdminInfo(); AdminCrtl ac =new AdminCrtl(); request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); PrintWriter out = response.getWriter(); int userid =Integer.parseInt(smartupload.getRequest().getParameter("adminId")); //获得相关 parameter String username =smartupload.getRequest().getParameter("admin_Name"); String userpwd =smartupload.getRequest().getParameter("admin_Pwd"); //命名文件所属文件夹 String head_portrait_folder="head_portrait"; //命名文件名 String head_portrait=username+"_"+"head_portrait"+"."+smartupload.getFiles().getFile(0).getFileExt(); //下面是判断文件夹是否存在,不存在就建立 String Save_location=""; String Save_package=""; Save_package=head_portrait_folder;//以 head_portrait作为为文件夹名 Save_package=Save_package.trim(); //去除空格 Save_location=this.getServletContext().getRealPath("/")+"upload_images/"+Save_package; //文件夹的具体路径 File ml = new File(Save_location); if(ml.exists()) {}else{ ml.mkdir(); } //具体的上传工作 String file_path=Save_location+"/"+head_portrait; try { smartupload.getFiles().getFile(0).saveAs(file_path) ; } catch (SmartUploadException e) { // TODO Auto-generated catch block e.printStackTrace(); } String file_path2=null; file_path2="upload_images/"+head_portrait_folder+"/"+head_portrait; ai=ac.selAdmin2(userid); //获得此id下的产品图片路径 String portrait_imgTemp=ai.getAdmin_head_portrait(); portrait_imgTemp=portrait_imgTemp.trim(); String temp[]=portrait_imgTemp.replaceAll("////","/").split("/"); if(temp.length>1){ portrait_imgTemp=temp[temp.length-1]; } portrait_imgTemp=portrait_imgTemp.substring(0,portrait_imgTemp.lastIndexOf("."))+"."; //产品图片、产品图赏图片均未修改 //头像上传路径 String head_portrait_img=null; if(portrait_imgTemp.equals(head_portrait)){ head_portrait_img=ai.getAdmin_head_portrait(); }else{ head_portrait_img =file_path2; } ai.setAdmin_name(username); ai.setAdmin_pwd(userpwd); ai.setAdmin_Id(userid); ai.setAdmin_head_portrait(head_portrait_img); int res =ac.updateAdmin(ai); if(res>0){ out.print("<script>alert('update success');window.location.href='../jsp/adminmanage.jsp';</script>"); }else{ out.print("<script>alert('update failed');window.history.back();</script>"); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }