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  • ajax异步加载查询数据库

    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
            <title>数据</title>
            <link rel="stylesheet" href="static/css/style.css" type="text/css">
            <!-- jQuery-easyUI start -->
            <link rel="stylesheet" type="text/css" href="https://www.jeasyui.com/easyui/themes/default/easyui.css">
            <link rel="stylesheet" type="text/css" href="https://www.jeasyui.com/easyui/themes/icon.css">
            <link rel="stylesheet" type="text/css" href="https://www.jeasyui.com/easyui/themes/color.css">
            <link rel="stylesheet" type="text/css" href="https://www.jeasyui.com/easyui/demo/demo.css">
            <script type="text/javascript" src="https://code.jquery.com/jquery-1.9.1.min.js"></script>
            <script type="text/javascript" src="https://www.jeasyui.com/easyui/jquery.easyui.min.js"></script>
            <!-- jQuery-easyUI end -->
            <script type="text/javascript">
                document.createElement("section");
                document.createElement("article");
                document.createElement("footer");
                document.createElement("header");
                document.createElement("hgroup");
                document.createElement("nav");
                document.createElement("menu");
            </script>
            <script type="text/javascript">
                function Save() {
                    document.getElementById("PageOfficeCtrl1").WebSave();
                }
            </script>
        </head>
        <body>
            <header>
                <div class="w12 header">
                    <a class="db logo fl"><img src="static/images/logo.jpg"
                        width="327" height="94" alt="" />
                    </a>
                    <div class="fr logofr">
                        <a href="#" class="blk">返回首页</a> |<a href="#" class="blk">客服中心</a><br>
                        如注册遇到问题请拨打:<strong style="font-size:14px;">400-000-0000</strong>
                    </div>
                </div>
            </header>
            <div class="head_border"></div>
            <section class="w12 login"> <em class="fr">当前用户:张三 </em> </section>
            <section class="main w12">
                <div class="title">
                    <a class="title1 db fl">审核报告</a><a class="title2 db fl">审核合同</a>
                </div>
                <div class="fr tit2">
                    <span class="arr"></span>
                </div>
            </section>
            <br /><br />
            
            <div style="text-align:content;margin-left: 300px;">
                <table id="dg" title="北京某某科技有限公司" class="easyui-datagrid" style="700px;height:250px;,margin: auto;"
                        url="get_users.php" toolbar="#toolbar" pagination="true" rownumbers="true" fitColumns="true" singleSelect="true">
                    <thead>
                        <tr id="insertSpareEpt">
                            <th field="firstname" width="50">单位编号</th>
                            <th field="lastname" width="50">单位名称</th>
                            <th field="phone" width="50">单位性质</th>
                            <th field="email" width="50">单位地址</th>
                        </tr>
                    </thead>
                </table>
            </div>
            
            <div id="toolbar">
                <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-add" plain="true" onclick="newUser()">添加</a>
                <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-edit" plain="true" onclick="editUser()">修改</a>
                <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-remove" plain="true" onclick="destroyUser()">删除</a>
            </div>
            <div id="divTab"></div>
            <!-- 弹窗 -->
            <div id="dlg" class="easyui-dialog" style="400px" data-options="closed:true,modal:true,border:'thin',buttons:'#dlg-buttons'">
                <form id="fm" method="post" novalidate style="margin:0;padding:20px 50px">
                    <h3>单位信息</h3>
                    <div style="margin-bottom:10px">
                        <input name="firstname" class="easyui-textbox" required="true" label="单位编号:" style="100%">
                    </div>
                    <div style="margin-bottom:10px">
                        <input name="lastname" class="easyui-textbox" required="true" label="单位名称:" style="100%">
                    </div>
                    <div style="margin-bottom:10px">
                        <input name="phone" class="easyui-textbox" required="true" label="单位性质:" style="100%">
                    </div>
                    <div style="margin-bottom:10px">
                        <input name="email" class="easyui-textbox" required="true" validType="email" label="单位地址:" style="100%">
                    </div>
                </form>
            </div>
            <div id="dlg-buttons">
                <a href="javascript:void(0)" class="easyui-linkbutton c6" iconCls="icon-ok" onclick="saveUser()" style="90px">添加</a>
                <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-cancel" onclick="javascript:$('#dlg').dialog('close')" style="90px">取消</a>
            </div>
            
            <script type="text/javascript">
                var url;
                function newUser(){
                    $('#dlg').dialog('open').dialog('center').dialog('setTitle','New User');
                    $('#fm').form('clear');
                    url = 'save_user.php';
                }
                function editUser(){
                    var row = $('#dg').datagrid('getSelected');
                    if (row){
                        $('#dlg').dialog('open').dialog('center').dialog('setTitle','Edit User');
                        $('#fm').form('load',row);
                        url = 'update_user.php?id='+row.id;
                    }
                }
                function saveUser1(){
                    $('#fm').form('submit',{
                        url: saveInfo,
                        onSubmit: function(){
                            return $(this).form('validate');
                        },
                        success: function(result){
                            var result = eval('('+result+')');
                            if (result.errorMsg){
                                $.messager.show({
                                    title: 'Error',
                                    msg: result.errorMsg
                                });
                            } else {
                                $('#dlg').dialog('close');        // close the dialog
                                $('#dg').datagrid('reload');    // reload the user data
                            }
                        }
                    });
                }
                
                /* 保存  */
                function saveUser(){
                    var info;
                    var firstname = $("input[name='firstname']").val();
                    var lastname = $("input[name='lastname']").val();
                    var phone = $("input[name='phone']").val();
                    var email = $("input[name='email']").val();
                    $.ajax({
                        type : 'get',
                        url : 'saveInfo',
                        data:{
                            "firstname":firstname,
                            "lastname":lastname,
                            "phone":phone,
                            "email":email
                        },
                        cache : false,
                        async : false,
                        dataType : 'json',
                        success : function(data){
                            $("#dg").datagrid("loadData",data);// 数据加载jQuery easyUI表格中
                        
                        /* var tabStr = "";
                        $.each(data, function(index,value){
                            var item = data[index];
                            var itemFirstname = item.firstname;
                            var itemLastname = item.lastname;
                            var itemPhone = item.phone;
                            var itemEmail = item.email;
                            var itemStr = "<table border='1' cellpadding='0' cellspacing='0'><tr>"+
                                          "<td name='firstname' width=50>"+itemFirstname+"</td>"+
                                          "<td name='lastname' width=50>"+itemLastname+"</td>"+
                                           "<td name='phone' width=50>"+itemPhone+"</td>"+
                                           "<td name='email' width=50>"+itemEmail+"</td>"+
                                      "</tr></table>";
                                tabStr += itemStr;
                        })
                        document.getElementById("divTab").innerHTML = tabStr; */
                        
                        } , error:function(data){
                            alert("加载数据失败!"+data);
                        }
                    });
                    // 关闭添加窗口
                    $('#dlg').dialog('close');
                }
                
                function destroyUser(){
                    var row = $('#dg').datagrid('getSelected');
                    if (row){
                        $.messager.confirm('Confirm','Are you sure you want to destroy this user?',function(r){
                            if (r){
                                $.post('destroy_user.php',{id:row.id},function(result){
                                    if (result.success){
                                        $('#dg').datagrid('reload');    // reload the user data
                                    } else {
                                        $.messager.show({    // show error message
                                            title: 'Error',
                                            msg: result.errorMsg
                                        });
                                    }
                                },'json');
                            }
                        });
                    }
                }
            </script>
        </body>
    </html>
    
    package com.wyebd.controller;
    
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.PreparedStatement;
    import java.sql.ResultSet;
    import java.sql.SQLException;
    import java.sql.Statement;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Map;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import org.apache.log4j.Logger;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.servlet.ModelAndView;
    import com.alibaba.fastjson.JSON;
    import com.wyebd.bean.Contract;
    import com.zhuozhengsoft.pageoffice.OpenModeType;
    import com.zhuozhengsoft.pageoffice.PageOfficeCtrl;
    import com.zhuozhengsoft.pageoffice.wordwriter.WordDocument;
    
    @RestController
    public class ReadDataController {
    
        private static Logger log = Logger.getLogger(ReadOnlyController.class);
        private final String DB_URL = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8";
        private static final String USER = "root";
        private static final String PASS = "root";
        private static Connection con = null;
        private static PreparedStatement ps = null;
        private static Statement stmt = null;
        private static ResultSet rs = null;
        
        /**
         * 跳转至查询页面
         * @param request
         * @param response
         * @param map
         * @return
         */
        @RequestMapping(value = "/readData", method = RequestMethod.GET)
        public ModelAndView readData() {
            ModelAndView mv = new ModelAndView("readData");
            return mv;
        }
        
        /**
         * 保存
         * @param request
         * @param response
         * @param map
         * @return
         */
        @RequestMapping("saveInfo")
        public String saveInfo(HttpServletRequest request, HttpServletResponse response, Map<String, Object> map) {
            List<Contract> list = new ArrayList<Contract>();
            String firstname = request.getParameter("firstname");
            String lastname = request.getParameter("lastname");
            String phone = request.getParameter("phone");
            String email = request.getParameter("email");
            String json = null;
            int id = 0;
            try {
                getConnection();
                ps = con.prepareStatement("insert into test values (?,?,?,?,?)");
                ps.setInt(1, id);
                ps.setString(2, firstname);
                ps.setString(3, lastname);
                ps.setString(4,phone);
                ps.setString(5, email);
                ps.executeUpdate();
                log.info("添加成功");
                rs = stmt.executeQuery("select * from test");
                while(rs.next()){
                    Contract con = new Contract();
                    con.setFirstname(rs.getString("firstname"));
                    con.setLastname(rs.getString("lastname"));
                    con.setPhone(rs.getString("phone"));
                    con.setEmail(rs.getString("email"));
                    list.add(con);
                }
                // list转为json传入前端
                json = JSON.toJSONString(list);
                log.info(json);
                // 取得流向JSP传递数据
                response.setContentType("text/html;charset=UTF-8");
                response.getWriter().println(json);
                response.reset();
            } catch (Exception e) {
                log.info("SQLException: " + e.getMessage());
                e.printStackTrace();
            } finally {
                try {
                    ps.close();
                    con.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
             return json;
        }
    
        /**
         * 连接数据库
         * @throws ClassNotFoundException
         * @throws SQLException
         */
        public void getConnection() throws ClassNotFoundException, SQLException {
            try {
                Class.forName("com.mysql.jdbc.Driver");
                con = DriverManager.getConnection(DB_URL, USER, PASS);
                stmt = con.createStatement();
            } catch (Exception e) {
                System.out.println("SQLException: " + e.getMessage());
                e.printStackTrace();
            }
        }
        
    }
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  • 原文地址:https://www.cnblogs.com/hongwei2085/p/9058535.html
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