去年做那些网站能致富,支付通道网站怎么做,艺术字logo生成器,有wordpress模板安装教程视频文章目录 1.Ajax验证用户名1.程序框架图2.修改MemberServlet3.修改login.jsp4.结果展示 2.Ajax判断验证码是否输入正确1.修改MemberServlet2.修改login.jsp3.结果展示 3.Ajax添加购物车1.程序框架图2.修改CartServlet2.修改index.jsp3.解决问题—未登录直接添加购物车#xff… 文章目录 1.Ajax验证用户名1.程序框架图2.修改MemberServlet3.修改login.jsp4.结果展示 2.Ajax判断验证码是否输入正确1.修改MemberServlet2.修改login.jsp3.结果展示 3.Ajax添加购物车1.程序框架图2.修改CartServlet2.修改index.jsp3.解决问题—未登录直接添加购物车ajax请求无法重定向到登录页面1.解决方案2.编写WebUtils判断是否是ajax请求3.修改MemberAuthorization过滤器4.修改index.jsp 4.结果展示1.未登录添加购物车跳转到登录页面2.登录之后添加购物车ajax局部刷新 4.上传更新家居图片1.需求分析2.程序框架图3.修改FurnServlet4.修改furn_update.jsp1.样式2.修改form的enctype3.修改td 5.解决bug写sql的时候注意映射映射映射!!!!!!!!卡了2个小时才发现醉了6.结果展示1.点击上传图片2.查看效果3.点击修改家居回到原页面 5.上传添加家居图片1.修改FurnServlet2.修改furn_add.jsp1.前端样式与前面一样2.修改form的enctype3.修改td 3.结果展示1.准备添加家居2.效果展示3.添加之后 1.Ajax验证用户名
1.程序框架图 2.修改MemberServlet //根据注册名判断数据库中是否存在并返回json格式的结果public void isExistName(HttpServletRequest req, HttpServletResponse resp) throws IOException {//获取用户名String username req.getParameter(username);//判断是否存在boolean res memberService.isExistsUsername(username);//返回json格式使用map形式MapString, Boolean map new HashMap();map.put(isExist, res);//转换成json格式Gson gson new Gson();String json gson.toJson(map);resp.getWriter().write(json);}3.修改login.jsp //绑定失去焦点事件$(#username).blur(function () {//获取信息并向后端发送ajax请求var username $(this).val();$.getJSON(memberServlet,{action: isExistName,username: username},function (data, status, xhr) {//根据是否存在显示信息if (data.isExist) {$(span.errorMsg).text(用户名已存在);} else {$(span.errorMsg).text(用户名可用);}})})4.结果展示 2.Ajax判断验证码是否输入正确
1.修改MemberServlet //根据验证码判断是否正确返回json格式的结果public void judgementCodeText(HttpServletRequest req, HttpServletResponse resp) throws IOException {//获取验证码String codeText req.getParameter(codeText);//获取验证码HttpSession session req.getSession();Object kaptchaSessionKey session.getAttribute(KAPTCHA_SESSION_KEY);boolean res false;if (kaptchaSessionKey ! null ((String) kaptchaSessionKey).equalsIgnoreCase(codeText)) {res true;}//将信息保存在map中并以json格式返回MapString, Object map new HashMap();map.put(judgementCodeText, res);Gson gson new Gson();String json gson.toJson(map);resp.getWriter().write(json);}2.修改login.jsp //验证码绑定失去焦点事件$(#code).blur(function () {var codeText $(this).val();//发送Ajax请求$.getJSON(memberServlet,{action: judgementCodeText,codeText: codeText},function (data, status, xhr) {//根据是否存在显示信息if (data.judgementCodeText) {$(span.errorMsg).text(验证码正确);} else {$(span.errorMsg).text(验证码错误);}})})3.结果展示 3.Ajax添加购物车
1.程序框架图 2.修改CartServlet //根据物品信息添加到购物车并以json格式返回数据public void addItemByAjax(HttpServletRequest req, HttpServletResponse resp) throws IOException {//获取前端物品信息Integer cartItemId DataUtils.parseInt(req.getParameter(cartItemId), -1);String cartItemName req.getParameter(cartItemName);BigDecimal cartItemPrice new BigDecimal(req.getParameter(cartItemPrice));//计算剩余数据项Integer cartItemCount 1;BigDecimal cartItemTotalPrice null;//获取sessionHttpSession session req.getSession();//获取存放物品信息的mapHashMapInteger, CartItem cart (HashMapInteger, CartItem) session.getAttribute(Cart);if (cart null || cart.isEmpty()) { //如果map是空的或者没有数据HashMapInteger, CartItem CartItemHashMap new HashMap();//只有一件总价格就是一件的价格cartItemTotalPrice cartItemPrice;//封装到bean中CartItem cartItem new CartItem(cartItemId, cartItemName, cartItemPrice, cartItemCount, cartItemTotalPrice);CartItemHashMap.put(cartItemId, cartItem);session.setAttribute(Cart, CartItemHashMap);session.setAttribute(totalNum, cartItemCount);session.setAttribute(allPrice, cartItemPrice);} else {//只要map里包含了同样的id则数量加一if (cart.containsKey(cartItemId)) {cartItemCount cart.get(cartItemId).getCount() 1;}//计算总价格cartItemTotalPrice cartItemPrice.multiply(new BigDecimal(cartItemCount));//封装到bean中CartItem cartItem new CartItem(cartItemId, cartItemName, cartItemPrice, cartItemCount, cartItemTotalPrice);cart.put(cartItemId, cartItem);//重新计算总价和商品数量并放到session中CartItem.calTotalNumAndPrice(cart, session);}//将totalNum以json的形式返回MapString, Object map new HashMap();map.put(cartTotalCount, (Integer) session.getAttribute(totalNum));Gson gson new Gson();String json gson.toJson(map);resp.getWriter().write(json);}2.修改index.jsp 3.解决问题—未登录直接添加购物车ajax请求无法重定向到登录页面
1.解决方案 2.编写WebUtils判断是否是ajax请求
package com.sxs.furns.utils;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** author 孙显圣* version 1.0*/
public class WebUtils {//判断是否是ajax请求public static boolean isAjaxRequest(HttpServletRequest request, HttpServletResponse response) {return XMLHttpRequest.equals(request.getHeader(X-Requested-With));}
}
3.修改MemberAuthorization过滤器
package com.sxs.furns.filter;import com.google.gson.Gson;
import com.sxs.furns.utils.WebUtils;import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;/*** 普通权限认证* author 孙显圣* version 1.0*/
public class MemberAuthorization implements Filter {Overridepublic void init(FilterConfig filterConfig) throws ServletException {}Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {HttpSession session ((HttpServletRequest) servletRequest).getSession();//进行普通权限认证Object username session.getAttribute(username);Object admin session.getAttribute(admin);if (username ! null || admin ! null) {//放行filterChain.doFilter(servletRequest, servletResponse);} else {//如果不是ajax请求就正常执行if (!WebUtils.isAjaxRequest((HttpServletRequest) servletRequest, (HttpServletResponse) servletResponse)){//重定向到用户登录界面((HttpServletResponse) servletResponse).sendRedirect(/jiaju_mail/views/member/login.jsp);}//如果是ajax请求就返回一个url,以json形式MapString, Object map new HashMap();map.put(url, views/member/login.jsp);String json new Gson().toJson(map);servletResponse.getWriter().write(json);}}Overridepublic void destroy() {}
}
4.修改index.jsp 4.结果展示
1.未登录添加购物车跳转到登录页面 2.登录之后添加购物车ajax局部刷新 4.上传更新家居图片
1.需求分析 2.程序框架图 3.修改FurnServlet /*** 读取表单信息进行修改** param req* param resp*/public void updateFurn(HttpServletRequest req, HttpServletResponse resp) throws IOException {//判断是否为文件类型的表单if (ServletFileUpload.isMultipartContent(req)) {//构建一个解析上传文件数据的工具对象DiskFileItemFactory diskFileItemFactory new DiskFileItemFactory();//将这个对象给servletFileUpload创建一个实例ServletFileUpload servletFileUpload new ServletFileUpload(diskFileItemFactory);//解决文件乱码servletFileUpload.setHeaderEncoding(utf-8);try {//获取文件项列表ListFileItem list servletFileUpload.parseRequest(req);Furn furn new Furn();//ArrayList存储所有的普通表单字段ArrayListString furnItems new ArrayList();//遍历文件项判断是一个文件还是普通表单字段做出不同的处理for (FileItem fileItem : list) {//普通表单字段处理if (fileItem.isFormField()) {//获取普通表单字段添加到ArrayList中String furnItem fileItem.getString(utf-8);furnItems.add(furnItem);} else {//文件项处理//获取文件名对名字进行处理防止重名String name UUID.randomUUID() _ System.currentTimeMillis() fileItem.getName();//创建将来要存放的目录这里不加/也会被认为是上下文路径跟地址栏无关但是建议加上String filePath /assets/images/product-image/;//获取真实路径String realPath super.getServletContext().getRealPath(filePath);//判断是否有这个目录如果没有再创建File file new File(realPath);if (!file.exists()) {file.mkdirs();}//将文件拷贝到刚才创建的目录下String fileFullPath realPath name;fileItem.write(new File(fileFullPath));//设置furn的imgPathString imgPath assets/images/product-image/ name;furn.setImgPath(imgPath);if (fileItem.getName() null || .equals(fileItem.getName())) {//如果没有修改图片则路径不变//从数据库中查询该id对应的imgPath//就这里查出来的结果跟数据库的imgPath结果不一致Furn rawFurn furnService.queryFurnById(DataUtils.parseInt(furnItems.get(0), 0));imgPath rawFurn.getImgPath();}furn.setImgPath(imgPath);}}//将普通订单项结果放到furn中furn.setId(DataUtils.parseInt(furnItems.get(0), 0));furn.setName(furnItems.get(1));furn.setMaker(furnItems.get(2));furn.setPrice(new BigDecimal(furnItems.get(3)));furn.setSales(DataUtils.parseInt(furnItems.get(4), 0));furn.setStock(DataUtils.parseInt(furnItems.get(5), 0));//获取pageNoString pageNo req.getParameter(pageNo);//执行更新操作if (furnService.updateFurn(furn)) {//更新成功则重定向到展示页面resp.sendRedirect(super.getServletContext().getContextPath() /manage/furnServlet?actionpagepageNo pageNo);} else {System.out.println(更新失败);}} catch (FileUploadException e) {throw new RuntimeException(e);} catch (Exception e) {throw new RuntimeException(e);}}}4.修改furn_update.jsp
1.样式 style typetext/css/* 整体表格样式 */.table-content table {width: 100%;border-collapse: collapse;margin: 20px 0;font-family: Segoe UI, Tahoma, Geneva, Verdana, sans-serif;box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);}.table-content th,.table-content td {text-align: left;padding: 12px;border-bottom: 1px solid #ddd;}.table-content th {background: linear-gradient(120deg, #006c70, #00b2a9);color: #ffffff;text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);}.table-content tr:hover {background-color: #f5f5f5;}/* 上传文件部分的样式 */.table-content .product-thumbnail {display: flex;flex-direction: column;align-items: center;position: relative;margin: 20px auto;}.table-content input[typefile] {width: 200px;height: 200px;opacity: 0;position: absolute;cursor: pointer;z-index: 2; /* 确保文件输入位于图片上方 */}.table-content img {border-radius: 50%;width: 150px;height: 150px;object-fit: cover; /* 确保图片不会失真 */border: 2px solid #009688; /* 图片边框颜色与表头一致 */box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); /* 轻微的阴影效果 */}/* 自定义文件上传提示样式 */.product-thumbnail::before {content: 点击或拖拽上传图片;position: absolute;width: 200px;height: 200px;background-color: rgba(0, 150, 136, 0.9);color: white;display: flex;justify-content: center;align-items: center;text-align: center;border-radius: 50%;font-size: 16px;transition: all 0.3s ease;opacity: 0;z-index: 1;font-family: Segoe UI, Tahoma, Geneva, Verdana, sans-serif;font-weight: 600;box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);}.product-thumbnail:hover::before {opacity: 1;}/* 调整提交按钮样式 */.table-content input[typesubmit] {background: linear-gradient(120deg, #31B0D5, #2196F3);color: white;padding: 10px 20px;border: none;border-radius: 5px;transition: background-color 0.3s ease;cursor: pointer;font-size: 16px;text-transform: uppercase;letter-spacing: 1px;box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);}.table-content input[typesubmit]:hover {background-color: #2196F3;}/* 响应式设计 */media (max-width: 768px) {.product-thumbnail {width: 150px;height: 150px;}.product-thumbnail input[typefile] {width: 150px;height: 150px;}.product-thumbnail img {width: 150px;height: 150px;}.product-thumbnail::before {width: 150px;height: 150px;font-size: 14px;}.table-content input[typesubmit] {padding: 8px 16px;}}/stylescript typetext/javascriptfunction prev(event) {//获取展示图片的区域var img document.getElementById(prevView);//获取文件对象var file event.files[0];//获取文件阅读器 Js的一个类直接使用即可var reader new FileReader();reader.readAsDataURL(file);reader.onload function () {//给img的src设置图片urlimg.setAttribute(src, this.result);}}/script
2.修改form的enctype 3.修改td 5.解决bug写sql的时候注意映射映射映射!!!卡了2个小时才发现醉了 6.结果展示
1.点击上传图片 2.查看效果 3.点击修改家居回到原页面 5.上传添加家居图片
1.修改FurnServlet /*** 添加家居并重新获取家居信息重定向到furn_manage.jsp** param req* param resp*/public void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException, InvocationTargetException, IllegalAccessException {//判断是否为文件类型的表单if (ServletFileUpload.isMultipartContent(req)) {//构建一个解析上传文件数据的工具对象DiskFileItemFactory diskFileItemFactory new DiskFileItemFactory();//将这个对象给servletFileUpload创建一个实例ServletFileUpload servletFileUpload new ServletFileUpload(diskFileItemFactory);//解决文件乱码servletFileUpload.setHeaderEncoding(utf-8);try {//获取文件项列表ListFileItem list servletFileUpload.parseRequest(req);Furn furn new Furn();//ArrayList存储所有的普通表单字段ArrayListString furnItems new ArrayList();//遍历文件项判断是一个文件还是普通表单字段做出不同的处理for (FileItem fileItem : list) {//普通表单字段处理if (fileItem.isFormField()) {//获取普通表单字段添加到ArrayList中String furnItem fileItem.getString(utf-8);furnItems.add(furnItem);} else {//文件项处理//获取文件名对名字进行处理防止重名String name UUID.randomUUID() _ System.currentTimeMillis() fileItem.getName();//创建将来要存放的目录这里不加/也会被认为是上下文路径跟地址栏无关但是建议加上String filePath /assets/images/product-image/;//获取真实路径String realPath super.getServletContext().getRealPath(filePath);//判断是否有这个目录如果没有再创建File file new File(realPath);if (!file.exists()) {file.mkdirs();}//将文件拷贝到刚才创建的目录下String fileFullPath realPath name;fileItem.write(new File(fileFullPath));//设置furn的imgPathString imgPath assets/images/product-image/ name;furn.setImgPath(imgPath);if (fileItem.getName() null || .equals(fileItem.getName())) {//如果没有修改图片则路径设置默认的imgPath assets/images/product-image/default.jpg;}furn.setImgPath(imgPath);}}//将普通订单项结果放到furn中furn.setName(furnItems.get(0));furn.setMaker(furnItems.get(1));furn.setPrice(new BigDecimal(furnItems.get(2)));furn.setSales(DataUtils.parseInt(furnItems.get(3), 0));furn.setStock(DataUtils.parseInt(furnItems.get(4), 0));//获取pageNoString pageNo req.getParameter(pageNo);//插入到数据库if (furnService.add(furn)) {//插入成功则重定向到家居显示的servletresp.sendRedirect(super.getServletContext().getContextPath() /manage/furnServlet?actionpagepageNo pageNo);} else {System.out.println(插入失败);}} catch (FileUploadException e) {throw new RuntimeException(e);} catch (Exception e) {throw new RuntimeException(e);}}}2.修改furn_add.jsp
1.前端样式与前面一样
2.修改form的enctype 3.修改td 3.结果展示
1.准备添加家居 2.效果展示 3.添加之后
