Java EE實現用戶後臺管理系統
本文實例為大傢分享瞭Java EE實現用戶後臺管理系統的具體代碼,供大傢參考,具體內容如下
主要功能
管理員登錄功能、管理員列表操作、用戶列表操作、訂單管理
登錄功能
設計思路:前端頁面獲取輸入的數據,然後發送Ajax請求,在servlet中獲取數據並調用service層中的方法進行處理,service層中調用dao層的實現方法,最終servlet返回一個結果集,判斷登錄是否成功。
login.html主要功能代碼:
<script> $(function () { $("#btn_login").click(function () { //獲取數據 let username = $("#username").val(); let password = $("#password").val(); //數據處理 $.post("admin/login", {username: username, password: password}, function (result) { if (result.flag) { location.href = "index.html"; } else { alert(result.errorMsg); } }); }); }) </script>
servlet中功能代碼:
//登錄 public void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //獲取用戶名和密碼 String username = request.getParameter("username"); String password = request.getParameter("password"); //封裝管理員對象 Administrator admin = new Administrator(); admin.setAname(username); admin.setPassword(password); //創建結果對象 ResultInfo resultInfo = new ResultInfo(); //調用service查詢 Administrator administrator = service.login(admin); if (administrator == null) { resultInfo.setFlag(false); resultInfo.setErrorMsg("用戶名或密碼錯誤!"); } if (administrator != null && !administrator.getStatus().equals("Y")) { resultInfo.setFlag(false); resultInfo.setErrorMsg("該賬戶未激活!"); } if (administrator != null && administrator.getStatus().equals("Y")) { resultInfo.setFlag(true); //設置session request.getSession().setAttribute("username", administrator.getAname()); } //調用父類中定義的方法,轉json數據後回傳 writeValue(resultInfo, response); }
service層中代碼實現:
@Override public Administrator login(Administrator administrator) { return dao.login(administrator); }
dao層中代碼實現:
@Override public Administrator login(Administrator administrator) { Administrator admin = null; try { String sql = "SELECT * FROM administrator WHERE aname = ? AND PASSWORD = ?"; admin = template.queryForObject(sql, new BeanPropertyRowMapper<>(Administrator.class), administrator.getAname(), administrator.getPassword()); } catch (Exception e) { } return admin; }
實現效果:
管理員列表
設計思路:數據操作與登錄功能大同小異,實現瞭管理員的增刪改查,在此重點介紹分頁、模糊查詢。
admin_list.html主要功能代碼:
<script> $(function () { let name = null; $("#btn_search").click(function () { name = $('#admin_name').val(); load(null, name) //取消按鈕的默認跳轉行為 導致會刷新頁面 return false; }) load(null, name); }); function load(currentPage, admin_name) { //發送ajax請求,請求route/pageQuery,傳遞cid $.get("admin/pageQuery", {currentPage: currentPage, admin_name: admin_name}, function (pb) { //定義字符 let lis = ""; //計算上一頁的頁碼 let beforeNum = pb.currentPage - 1; if (beforeNum <= 0) { beforeNum = 1; } let beforePage = '<a class="prev" href="javascript:load(' + beforeNum + ',\'' + admin_name + '\')"><<</a>'; lis += beforePage; //定義開始位置begin,結束位置end let begin; let end; if (pb.totalPage < 10) { //總頁碼不足10頁 begin = 1; end = pb.totalPage; } else { //總頁碼超過10頁 begin = pb.currentPage - 5; end = pb.currentPage + 4; //前邊不足5個,後邊補齊 if (begin < 1) { begin = 1; end = begin + 9; } if (end > pb.totalPage) { end = pb.totalPage; begin = end - 9; } } //展示分頁頁碼 for (let i = begin; i <= end; i++) { let li; //判斷當前頁碼是否等於i,創建頁碼的li if (pb.currentPage === i) { li = '<a class="num" href="javascript:load(' + i + ',\'' + admin_name + '\')"><span class="current">' + i + '</span></a>'; } else { li = '<a class="num" href="javascript:load(' + i + ',\'' + admin_name + '\')">' + i + '</a>'; } //拼接字符串 lis += li; } //計算下一頁的頁碼 let nextNum = pb.currentPage + 1; if (nextNum >= pb.totalPage) { nextNum = pb.totalPage; } let nextPage = '<a class="next" href="javascript:load(' + nextNum + ',\'' + admin_name + '\')">>></a>'; lis += nextPage; //將lis內容設置到ul $("#pageNum").html(lis); //列表數據展示 let admin_lis = ""; for (let i = 0; i < pb.list.length; i++) { let admin = pb.list[i]; let li; if (admin.status === "Y") { li = '<tr>\n' + ' <td>\n' + ' <input type="checkbox" name="checkedId" id="checkedId" lay-skin="primary">\n' + ' <div class="layui-unselect layui-form-checkbox" lay-skin="primary"><i class="layui-icon layui-icon-ok"></i></div>' + ' </td>\n' + ' <td>' + admin.aid + '</td>\n' + ' <td>' + admin.aname + '</td>\n' + ' <td>' + admin.phone + '</td>\n' + ' <td>' + admin.email + '</td>\n' + ' <td>' + admin.role + '</td>\n' + ' <td>' + admin.date + '</td>\n' + ' <td class="td-status">\n' + ' <span class="layui-btn layui-btn-normal layui-btn-mini" style="background-color: #1E9FFF">已啟用</span></td>\n' + ' <td class="td-manage">\n' + ' <a onclick="member_stop(this,' + admin.aid + ')" href="javascript:;" title="啟用">\n' + ' <i class="layui-icon"></i>\n' + ' </a>\n' + ' <a title="編輯" onclick="xadmin.open(\'編輯管理員\',\'admin-edit.html?aid=' + admin.aid + '\',600,500)" href="javascript:;">\n' + ' <i class="layui-icon"></i>\n' + ' </a>\n' + ' <a title="刪除" onclick="member_del(this,\'要刪除的id\')" href="javascript:;">\n' + ' <i class="layui-icon"></i>\n' + ' </a>\n' + ' </td>\n' + '</tr>'; } else if (admin.status === "N") { li = '<tr>\n' + ' <td>\n' + ' <input type="checkbox" name="checkedId" id="checkedId" lay-skin="primary">\n' + ' <div class="layui-unselect layui-form-checkbox" lay-skin="primary"><i class="layui-icon layui-icon-ok"></i></div>' + ' </td>\n' + ' <td>' + admin.aid + '</td>\n' + ' <td>' + admin.aname + '</td>\n' + ' <td>' + admin.phone + '</td>\n' + ' <td>' + admin.email + '</td>\n' + ' <td>' + admin.role + '</td>\n' + ' <td>' + admin.date + '</td>\n' + ' <td class="td-status">\n' + ' <span class="layui-btn layui-btn-normal layui-btn-mini" style="background-color: gray">已停用</span></td>\n' + ' <td class="td-manage">\n' + ' <a onclick="member_stop(this,' + admin.aid + ')" href="javascript:;" title="停用">\n' + ' <i class="layui-icon"></i>\n' + ' </a>\n' + ' <a title="編輯" onclick="xadmin.open(\'編輯管理員\',\'admin-edit.html?aid=' + admin.aid + '\',600,500)" href="javascript:;">\n' + ' <i class="layui-icon"></i>\n' + ' </a>\n' + ' <a title="刪除" onclick="member_del(this,\'要刪除的id\')" href="javascript:;">\n' + ' <i class="layui-icon"></i>\n' + ' </a>\n' + ' </td>\n' + '</tr>'; } admin_lis += li; } //設置列表數據 $("#admin_msg").html(admin_lis); }); } </script>
servlet中功能代碼:
//分頁、模糊查詢 public void pageQuery(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //接收參數 String currentPageStr = request.getParameter("currentPage"); //接收admin_name管理員名稱 String admin_name = request.getParameter("admin_name"); //判斷admin_name是否為null if (admin_name != null && !"null".equals(admin_name) && admin_name.length() > 0) { admin_name = new String(admin_name.getBytes("iso-8859-1"), "utf-8"); } else { admin_name = ""; } int currentPage = 0; //當前頁碼,不傳遞參數,默認為1 if (currentPageStr != null && currentPageStr.length() > 0) { currentPage = Integer.parseInt(currentPageStr); } else { currentPage = 1; } //每頁顯示條數,默認為5 int pageSize = 5; //調用service查詢PageBean對象 PageBean<Administrator> pb = service.pageQuery(currentPage, pageSize, admin_name); //將pageBean對象序列化為json,返回 writeValue(pb, response); }
service層中代碼實現:
@Override public PageBean<Administrator> pageQuery(int currentPage, int pageSize, String admin_name) { //封裝PageBean PageBean<Administrator> pb = new PageBean<>(); //設置當前頁碼 pb.setCurrentPage(currentPage); //設置每頁顯示條數 pb.setPageSize(pageSize); //設置總記錄數 int totalCount = dao.findTotalCount(admin_name); pb.setTotalCount(totalCount); //設置當前頁顯示的數據集合 int start = (currentPage - 1) * pageSize; //開始的記錄數 List<Administrator> list = dao.findByPage(start, pageSize, admin_name); pb.setList(list); //設置總頁數 = 總記錄數/每頁顯示條數 int totalPage = totalCount % pageSize == 0 ? totalCount / pageSize : (totalCount / pageSize) + 1; pb.setTotalPage(totalPage); return pb; }
dao層中代碼實現:
@Override public int findTotalCount(String admin_name) { //定義sql模板 String sql = "SELECT COUNT(*) FROM administrator WHERE 1=1 "; StringBuilder sb = new StringBuilder(sql); //條件 List<Object> params = new ArrayList<>(); if (admin_name != null && admin_name.length() > 0) { sb.append(" and aname like ? "); params.add("%" + admin_name + "%"); } sql = sb.toString(); return template.queryForObject(sql, Integer.class, params.toArray()); } @Override public List<Administrator> findByPage(int start, int pageSize, String admin_name) { String sql = "SELECT * FROM administrator WHERE 1=1 "; StringBuilder sb = new StringBuilder(sql); //條件 List<Object> params = new ArrayList<>(); //判斷參數是否有值 if (admin_name != null && admin_name.length() > 0) { sb.append(" and aname like ? "); params.add("%" + admin_name + "%"); } //分頁條件 sb.append(" limit ?,? "); params.add(start); params.add(pageSize); //轉字符串 sql = sb.toString(); return template.query(sql, new BeanPropertyRowMapper<>(Administrator.class), params.toArray()); }
實現效果:
用戶列表
設計思路:與管理員列表設計思路基本類似。
實現效果:
訂單管理
設計思路:與管理員列表設計思路基本類似。
以上就是本文的全部內容,希望對大傢的學習有所幫助,也希望大傢多多支持WalkonNet。
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