easyui+nodejs+sqlserver增删改查实现

用到的模块或者技术：

Express: http://www.expressjs.com.cn/4x/api.html#express

Easyui: http://www.jeasyui.com/documentation/index.php#

express-session：https://www.npmjs.com/package/express-session#resave

node-mssql: http://csdoc.org/

Redis: http://redis.io/

art-Template：http://www.jq22.com/jquery-info1097(一种高性能js模板引擎)

connect-redis：https://www.npmjs.com/package/connect-redis(用来将服务端session同步至分布式redis缓存)

先来看下整体效果：

　　　　　　　　　　　　图1 登录页面

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　图2 用户管理主界面

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　图3 系统设置-密码修改

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　图4 系统设置-退出系统

1、项目结构

routes下user.js作为控制器负责请求分发处理，views下存放user文件夹存放user模块全部视图html资源，系统入口为login.html文件，进行登录操作。

2、数据库模块

　　数据库连接使用node-mssql实现sqlserver数据库连接，对增删改查做了简单封装，没有统一整理显得比较凌乱，详细代码如下：

var node_mssql = require('node-mssql');
var express = require('express');

/* add configuration to query object */
var queryObj = new node_mssql.Query({
    host: 'localhost',
    port: 1433,
    username: 'sa',
    password: 'sa123456',
    db: 'mydatabase'
});

var insert = function (data, insertTable,callback) {

    queryObj.table(insertTable);
    queryObj.data(data);
    queryObj.insert(function (results) {
        callback(results);
    }, function (err, sql) {
        if (err) {
            console.log(err);
        }
    });
};

var list = function (successCallback, option, listTable) {

    queryObj.table(listTable);
    queryObj.where(option);
    queryObj.select(function (results) {
        successCallback(results);
    }, function (err, sql) {
        if (err)
            console.log(err);
    });

};

var update = function (data, option, updateTable,successCallback) {

    queryObj.table(updateTable);
    queryObj.data(data);
    queryObj.where(option);

    queryObj.update(function (results) {
        successCallback(results);
    }, function (err, sql) {
        if (err)
            console.log(err);
        //console.log(sql);
    });

};

var del = function (ids, table,successCallback,failedCallback) {

    queryObj.query("delete from " + table + " where id in ( " + ids + " )",successCallback,failedCallback);

};

var list_sql = function(sql,successCallback){
    queryObj.query(sql, successCallback,function(err){
        console.log(err);
    });
};

var total = function(sql,callback){
    queryObj.query(sql,callback,function(err){
        console.log(err);
    });
};

var findUserById = function(sql,successCallback,failedCallback){
  queryObj.query(sql,successCallback,failedCallback);
};

exports.list = list;
exports.list_sql = list_sql;
exports.insert = insert;
exports.update = update;
exports.del = del;
exports.total = total;
exports.findUserById = findUserById;

 3、修改默认引擎

修改默认引擎为html而非ejs，修改操作如下，具体可查询官网说明：

// view engine setup
var template = require('art-template');
template.config('base', '');
template.config('extname', '.html');
app.engine('.html', template.__express);
app.set('view engine', 'html');
app.set('views', __dirname + '/views');

4、connect-redis的使用

var express = require('express');
var session = require("express-session");
var cookieParser = require('cookie-parser');
var RedisStore = require("connect-redis")(session);     //用于将session保存至redis中
var app = express();
app.use(session({
    store: new RedisStore({
        host: 'localhost',
        port: 6379
    }),
    secret: '1234567890QWERTY'
}));

在app.js中加入该设置后，在js代码中通过req.session.key= value，可以直接保存key:value的数值对保存至session从而直接同步至redis中，方便分布式下实现session会话的统一管理不丢失。

5、登录处理

router.post("/user/login", function (req, res) {

    var username = req.param("username");
    var password = req.param("password");
    var obj = {"username": username, "password": password};

    dbConn.list(function (results) {
        if (results == "") {
            res.render("login", {"err": "用户名或密码错误"});
        } else {
            dbConn.findUserById("select * from dbo.t_user where id = " + results[0].id, function(recordset){
                req.session.user = recordset[0];
                console.log(recordset[0]);
                res.render("user/userMain",{"currentUser":recordset[0]});
            },function(err,sql){
                console.log(err);
            });
        }
    },obj, "dbo.t_user");

});

判断results是否为空，如果为空则表示用户名或者密码错误（前台已进行非空校验），直接跳转至login界面，显示：用户名或密码错误；

如果results非空，一是将用户信息存至session，二是将用户信息render至跳转页面，这样直接在页面中可以显示当前用户登录信息。

6、url控制拦截

app.use('/', user);

app.use(function (req, res, next) {
    var url = req.originalUrl;
    console.log("############" + url);
    if (url != "/" && !req.session.user) {
        return res.redirect("/");
    }
    next();
});

在业务拦截处理后面加入以上代码片段进行url拦截，防止非法登录访问。如果请求的url非根目录并且当且用户没有session(表示未登录访问)，直接redirect至登录页面。

7、user.js请求处理模块

/**
 * Created by Administrator on 2015/8/28.
 */
var express = require('express');
var dbConn = require("./dbConn.js");
var router = express.Router();

/* GET home page. */
//路由分发登录请求
router.get('/', function (req, res, next) {

    res.render('login');

});

//登录处理
router.post("/user/login", function (req, res) {

    var username = req.param("username");
    var password = req.param("password");
    var obj = {"username": username, "password": password};

    dbConn.list(function (results) {
        if (results == "") {
            res.render("login", {"err": "用户名或密码错误"});
        } else {
            dbConn.findUserById("select * from dbo.t_user where id = " + results[0].id, function(recordset){
                req.session.user = recordset[0];
                console.log(recordset[0]);
                res.render("user/userMain",{"currentUser":recordset[0]});
            },function(err,sql){
                console.log(err);
            });
        }
    },obj, "dbo.t_user");

});

router.get("/user/userManage.html", function (req, res) {
    res.render("user/userManage", {"msg": "hello userManage"});
});

//查询
router.post("/user/list", function (req, res) {
    console.dir(req.session.user);
    var count = 0;
    var page = req.param("page");
    var rows = req.param("rows");
    var username = req.body.username;
    if(typeof(username) == "undefined"){
        username = "";
    }
    console.log(page + ">" + rows + ">" + username);
    var options = {page:page,rows:rows,username:username};
    var jsonArray,sql;
    if (options != "") {
        if (options.username != "") {
            //sql = "select top(" +rows+ ") * from dbo.t_user where username like '%"+options.username+"%' and id not in(select top(" + (page-1) * rows + ") id from dbo.t_user ) ";    /*最后一页查询数据有误，还需改进*/
            sql = "select top(" +rows+ ") * from (select ROW_NUMBER() over( order by id) as row,* from dbo.t_user where username like '%"+options.username+"%' ) a where a.row > " + (page-1)*rows;
            console.log(sql);
            dbConn.list_sql(sql,function(recordset){
                dbConn.list_sql("select * from dbo.t_user where username like '%" + options.username + "%'",function(result){
                    jsonArray = {rows:recordset,total:result.length};
                    res.json(jsonArray);
                });
            });
        }
        if (options.username == "") {
            sql = "select top(" +rows+ ") * from dbo.t_user where id not in(select top(" + (page-1) * rows + ") id from dbo.t_user )";
            //sql = "select top(" +rows+ ") * from (select ROW_NUMBER() over( order by id) as row,* from dbo.t_user) a where a.row > " + (page-1)*rows;
            console.log(sql);
            dbConn.list_sql(sql,function(recordset){
                dbConn.list_sql("select * from dbo.t_user where username like '%" + options.username + "%'",function(result){
                    jsonArray = {rows:recordset,total:result.length};
                    res.json(jsonArray);
                });
            });
        }
    }
});

//添加或者修改
router.post("/user/add/:id(\\d+)",function(req,res){
    var obj = req.body;
    dbConn.update(obj,{id:req.params.id},"dbo.t_user",function(results){
        res.json({success:true});
    });

});

router.post("/user/add",function(req,res){
        var obj = req.body;
        dbConn.insert(obj,"dbo.t_user",function(results){
            res.json({success:true});
        });
});

//删除
router.post("/user/delete",function(req,res){
    var ids = req.param("ids");
    console.log(ids);
    dbConn.del(ids,"dbo.t_user",function(recordset){
        res.json({success:true});
    },function(err,sql){
        console.log(err);
    });

});

router.get("/user/exit",function(req,res){
    //清除系统session
    req.session.destroy(function(err) {
        console.log(err);
    });
    res.redirect("/");
});

router.post("/user/modifyPass",function(req,res){
    var user = req.session.user;
    var oldPwd = req.body.oldPwd;
    dbConn.list(function(results){
        if(results.length == 0){
            res.json({success:false});
        }else{
            var id = user.id;
            var data = {password:req.body.rPwd};
            //console.log(req.body);
            dbConn.update(data,{id:id},"dbo.t_user",function(results){
                res.json({success:true});
            });
        }
    },{username:user.username,password:oldPwd},"dbo.t_user");

});

module.exports = router;

8、userMain.html用户页面主模块

<!DOCTYPE html>
<html lang="en">
<meta charset="UTF-8">
<title>Full Layout - jQuery EasyUI Demo</title>

<link rel="stylesheet" type="text/css" href="/javascripts/jquery-easyui-1.4.3/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="/javascripts/jquery-easyui-1.4.3/themes/icon.css">
<link rel="stylesheet" type="text/css" href="/javascripts/jquery-easyui-1.4.3/demo/demo.css">
<script type="text/javascript" src="/javascripts/jquery-easyui-1.4.3/jquery.min.js"></script>
<script type="text/javascript" src="/javascripts/jquery-easyui-1.4.3/jquery.easyui.min.js"></script>
<script type="text/javascript" src="/javascripts/jquery-easyui-1.4.3/locale/easyui-lang-zh_CN.js"></script>
<script type="text/javascript" src="/javascripts/disableMove.js"></script>
<script>

    var url;
    function openTab(text,url,iconCls){
        if($("#tabs").tabs("exists",text)){
            $("#tabs").tabs("select",text);
        }else{
            var content = "<iframe frameborder=0 scrolling='auto' style='width:100%;height:100%;' src='/user/"+url+"'></iframe>";
            $("#tabs").tabs("add",{
                title:text,
                iconCls:iconCls,
                closable:true,
                content:content
            });
        }
    }

    function openModifyPassDlg(){
        $("#fm").form("reset");
        $("#dlg").dialog("open").dialog("setTitle","修改密码");
    }

    function savePass(){
        //save处理
        $("#fm").form("submit",{
            url: "/user/modifyPass",
            onSubmit:function(){
                if($("#oldPwd").val() == ""){
                    $.messager.alert("系统提示","请输入您的原密码");
                    return false;
                }
                if($("#newPwd").val() == ""){
                    $.messager.alert("系统提示","请输入新密码");
                    return false;
                }
                if($("#rPwd").val() == ""){
                    $.messager.alert("系统提示","请再次确认密码");
                    return false;
                }
                if($("#newPwd").val() != $("#rPwd").val()){
                    $.messager.alert("系统提示","两次输入密码不匹配，请重新输入");
                    return false;
                }
                return $(this).form("validate");
            },
            success:function(result){
                var result = eval('('+result+')');
                if(result.success){
                    $.messager.alert("系统提示","密码修改成功，下次重启生效");
                    $("#dlg").dialog("close");
                    $("#fm").form("reset");
                }else{
                    $.messager.alert("系统提示","密码修改失败");
                    return;
                }
            }
        });
    }

    function userExit(){
        $.messager.confirm('确认退出','您确定退出系统？',function(r){
            if (r){
                window.location.href = "/user/exit";    //跳转
            }
            return false;
        });
    }

    function closePassModifyDialog(){
        $("#dlg").dialog("close");
        $("#fm").form("reset");
    }

</script>
</head>

<body class="easyui-layout">

<div region="north" style="height:78px;background-color: #E0ECFF;">
    <table style="padding:5px;width:100%;">
        <tr>
            <td>&nbsp;</td>
        </tr>
        <tr>
            <td valign="bottom" align="right" width="80%">&nbsp; &nbsp;<strong>欢迎&nbsp;&nbsp;{{currentUser.username}}</strong>&nbsp;
                &nbsp;&nbsp;&nbsp;
            </td>
        </tr>
    </table>
</div>

<div region="center">
    <div class="easyui-tabs" fit="true" id="tabs">
        <div title="首页" data-options="iconCls:'icon-home'">
            <iframe frameborder=0 scrolling='auto' style='width:100%;height:100%;' src='http://www.cnblogs.com/caiya928/'></iframe>
        </div>
    </div>
</div>

<div region="west" style="width:200px;" title="导航菜单" split="true">
    <div class="easyui-accordion" data-options="fit:true,border:false">

        <div title="用户管理" data-options="iconCls:'icon-user',selected:true"
             style="padding:5px;">
            <a href="javascript:openTab('用户管理','userManage.html','icon-user_comment')"
               class="easyui-linkbutton"
               data-options="plain:true,iconCls:'icon-user_comment'">用户管理</a>
        </div>

        <div title="系统设置" data-options="iconCls:'icon-wrench',selected:true"
             style="padding:5px;">
            <a href="javascript:openModifyPassDlg()" class="easyui-linkbutton"
               data-options="plain:true,iconCls:'icon-vcard_key'">密码修改</a></br>
            <a href="javascript:userExit()" class="easyui-linkbutton"
               data-options="plain:true,iconCls:'icon-2012080412301'">退出系统</a>
        </div>
    </div>
</div>

<div region="south" style="height:25px;padding:5px;" align="center">
    @copyright &nbsp;&nbsp;博客园&nbsp;&nbsp;<a href="http://www.cnblogs.com/caiya928/">http://www.cnblogs.com/caiya928/</a>
</div>

<div id="dlg" class="easyui-dialog"
     style="width: 400px;height:300px;padding: 10px 20px" closed="true"
     buttons="#dlg-buttons">
    <form id="fm" method="post">
        <table cellspacing="10px">
            <tr>
                <td>用户名：</td>
                <td><input type="text" id="username" name="username" value="{{currentUser.username}}"
                           class="easyui-validatebox" readonly="readonly" style="width: 230px"/></td>
            </tr>
            <tr>
                <td>当前密码：</td>
                <td><input type="password" id="oldPwd" name="oldPwd"
                           class="easyui-validatebox" required="true" style="width: 100%;"/></td>
            </tr>
            <tr>
                <td>新密码：</td>
                <td><input type="password" id="newPwd"
                           name="newPwd" class="easyui-validatebox" required="true"
                           style="width: 100%;"/></td>
            </tr>
            <tr>
                <td>确认密码：</td>
                <td>
                    <input id="rPwd" name="rPwd" type="password" class="easyui-validatebox" data-options=""
                           required="required"  style="width: 100%">
                </td>
            </tr>
        </table>
    </form>
</div>

<div id="dlg-buttons">
    <a href="javascript:savePass()" class="easyui-linkbutton"
       iconCls="icon-ok">保存</a> <a
        href="javascript:closePassModifyDialog()"
        class="easyui-linkbutton" iconCls="icon-cancel">关闭</a>
</div>

</body>

</html>

9、userManage.html用户管理模块详细

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" type="text/css" href="/javascripts/jquery-easyui-1.4.3/themes/default/easyui.css">
    <link rel="stylesheet" type="text/css" href="/javascripts/jquery-easyui-1.4.3/themes/icon.css">
    <link rel="stylesheet" type="text/css" href="/javascripts/jquery-easyui-1.4.3/demo/demo.css">
    <script type="text/javascript" src="/javascripts/jquery-easyui-1.4.3/jquery.min.js"></script>
    <script type="text/javascript" src="/javascripts/jquery-easyui-1.4.3/jquery.easyui.min.js"></script>
    <script type="text/javascript" src="/javascripts/jquery-easyui-1.4.3/locale/easyui-lang-zh_CN.js"></script>
    <script type="text/javascript" src="/javascripts/disableMove.js"></script>
    <script type="text/javascript">

        var url;
        function saveUser(){
            $('#fm').form('submit', {
                url:url,
                onSubmit:function(){
                    if($("#username").val() == ""){
                        $.messager.alert("系统提示","请填写用户名");
                        return false;
                    }
                    if($("#password").val() == ""){
                        $.messager.alert("系统提示","请填写密码");
                        return false;
                    }
                    if($("#sex").combobox("getValue") == ""){
                        $.messager.alert("系统提示","请选择性别");
                        return false;
                    }
                    if($("#birthday").datebox("getValue") == ""){
                        $.messager.alert("系统提示","请选择出生日期");
                        return false;
                    }
                    if($("#email").val() == ""){
                        $.messager.alert("系统提示","请输入您的邮箱");
                        return false;
                    }
                    if($("#address").val() == ""){
                        $.messager.alert("系统提示","请输入您的地址");
                        return false;
                    }
                    return $(this).form("validate");
                },
                success: function(result){
                    var result = eval('('+result+')');
                    if(result.success){
                        $.messager.alert("系统提示","保存成功");
                        $("#fm").form("reset");
                        $("#dlg").dialog("close");
                        $("#dg").datagrid("reload");
                    }else{
                        $.messager.alert("系统提示","保存失败");
                        return;
                    }
                }
            });
        }

        function openUserAddDialog(){
            $("#fm").form("reset"); //打开之前先清空数据
            $("#dlg").dialog("open").dialog("setTitle","添加用户");
            url = "/user/add";
        }

        function searchUser(){
            $("#dg").datagrid("load",{
                "username":$("#s_userName").val()
            });
        }

        function deleteUser(){
            var selectedRows=$("#dg").datagrid('getSelections');
            if(selectedRows.length==0){
                $.messager.alert("系统提示","请选择要删除的数据！");
                return;
            }
            var strIds=[];
            for(var i=0;i<selectedRows.length;i++){
                strIds.push(selectedRows[i].id);
            }
            var ids=strIds.join(",");
            $.messager.confirm("系统提示","您确认要删除这<font color=red>"+selectedRows.length+"</font>条数据吗？",function(r){
                if(r){
                    $.post("/user/delete",{ids:ids},function(result){  //result直接返回Object，所以无需转换为json
                        if(result.success){
                            $.messager.alert("系统提示","数据已成功删除！");
                            $("#dg").datagrid("reload");
                        }else{
                            $.messager.alert("系统提示","数据删除失败！");
                        }
                    },"json");
                }
            });
        }

        function openUserModifyDialog(){
            var selectedRows=$("#dg").datagrid('getSelections');
            if(selectedRows.length != 1){
                $.messager.alert("系统提示","请选择一条数据进行修改");
                return;
            }
            var row = selectedRows[0];
            $("#dlg").dialog("open").dialog("setTitle","修改用户信息");
            dispValue(row);
            url = "/user/add/"+row.id;
        }

        function dispValue(row){
            $("#username").val(row.username);
            $("#password").val(row.password);
            $("#sex").combobox("setValue",row.sex);
            $("#birthday").datebox("setValue",row.birthday);
            $("#email").val(row.email);
            $("#address").val(row.address);
        }

        function closeUserDialog(){
            $("#dlg").dialog("close");
            $("#fm").form("reset");
        }

        function formatEmail(value,rowData,rowIndex){
            return value.substr(0,10);
        }

    </script>

    <title>用户管理</title>
</head>
<body style="margin: 1px">

<table id="dg" title="用户管理" class="easyui-datagrid" fitColumns="true" pagination="true" rownumbers="true"
       url="/user/list" fit="true" toolbar="#tb">
    <thead>
    <tr>
        <th field="cb" checkbox="true" align="center"></th>
        <th field="id" width="50" align="center">编号</th>
        <th field="username" width="100" align="center">用户名</th>
        <th field="sex" width="50" align="center">性别</th>
        <th field="birthday" width="100" align="center" formatter="formatEmail">出生日期</th>
        <th field="email" width="100" align="center">邮箱</th>
        <th field="address" width="100" align="center">收货地址</th>
    </tr>
    </thead>
</table>

<div id="tb">
    <div>
        <a href="javascript:openUserAddDialog()" class="easyui-linkbutton" data-options="plain:true,iconCls:'icon-user_add'">添加用户</a>&nbsp;
        <a href="javascript:openUserModifyDialog()" class="easyui-linkbutton" data-options="plain:true,iconCls:'icon-user_edit'">修改用户</a>&nbsp;
        <a href="javascript:deleteUser()" class="easyui-linkbutton" data-options="plain:true,iconCls:'icon-user_delete'">删除用户</a>
    </div>
    <div>
        &nbsp;
        用户名：<input type="text" id="s_userName" size="20" onkeydown="if(event.keyCode == 13) searchUser();">&nbsp;
        <a href="javascript:searchUser()" class="easyui-linkbutton" data-options="plain:true,iconCls:'icon-search'">查询</a>
    </div>
</div>

<div class="easyui-dialog" id="dlg" style="width:480px;height:330px;padding:10px 10px;" closed="true" buttons="#dlg-buttons" data-options="" >
    <form action="" method="post" id="fm">
        <table cellspacing="8px" align="center">
            <tr>
                <td>用户名：</td>
                <td><input type="text" id="username" name="username" class="easyui-validatebox" required="true" style="width: 300px;"/></td>
                <td>&nbsp;&nbsp;&nbsp;</td>
            </tr>
            <tr>
                <td>密&nbsp;&nbsp;码：</td>
                <td><input type="password" id="password" name="password" class="easyui-validatebox" required="true"/></td>
                <td>&nbsp;&nbsp;&nbsp;</td>
            </tr>
            <tr>
                <td>性&nbsp;&nbsp;别：</td>
                <td colspan="2">
                    <select class="easyui-combobox" id="sex" name="sex" style="width:30%" editable="false" panelHeight="auto">
                        <option value="">请选择性别</option>
                        <option value="男">男</option>
                        <option value="女">女</option>
                    </select>
                </td>
            </tr>
            <tr>
                <td>出生日期：</td>
                <td><input type="text" id="birthday" name="birthday" class="easyui-datebox" editable="false" required="true"/></td>
                <td>&nbsp;&nbsp;&nbsp;</td>
            </tr>
            <tr>
                <td>邮&nbsp;&nbsp;箱：</td>
                <td><input type="text" id="email" name="email" class="easyui-validatebox" required="true" data-options="validType:'email'" style="width: 300px;"/></td>
                <td>&nbsp;&nbsp;&nbsp;</td>
            </tr>
            <tr>
                <td>收货地址：</td>
                <td>
                    <input type="text" valign="top" id="address" name="address" class="easyui-validatebox" required="true" style="width: 306px;"/>
                </td>
            </tr>
        </table>
    </form>
</div>

<div id="dlg-buttons">
    <a href="javascript:saveUser();" class="easyui-linkbutton" iconCls="icon-ok">保存</a>
    <a href="javascript:closeUserDialog();" class="easyui-linkbutton" iconCls="icon-cancel">取消</a>
</div>

</body>
</html>

10、处理easyui中dialog、window、panel等窗体拖动时超出父窗体不能拖回的问题

/**
 * Created by Administrator on 2015/8/31.
 */
var easyuiPanelOnMove = function(left, top) {
    var parentObj = $(this).panel('panel').parent();
    if (left < 0) {
        $(this).window('move', {
            left : 1
        });
    }
    if (top < 0) {
        $(this).window('move', {
            top : 1
        });
    }
    var width = $(this).panel('options').width;
    var height = $(this).panel('options').height;
    var right = left + width;
    var buttom = top + height;
    var parentWidth = parentObj.width();
    var parentHeight = parentObj.height();
    if(parentObj.css("overflow")=="hidden"){
        if(left > parentWidth-width){
            $(this).window('move', {
                "left":parentWidth-width
            });
        }
        if(top > parentHeight-height){
            $(this).window('move', {
                "top":parentHeight-height
            });
        }
    }
};
$.fn.panel.defaults.onMove = easyuiPanelOnMove;
$.fn.window.defaults.onMove = easyuiPanelOnMove;
$.fn.dialog.defaults.onMove = easyuiPanelOnMove;

将以上代码保存为任意js文件，在需要处理的页面中直接引入即可。

详细代码设计已完毕，改进的地方还有很多，比如：

1、数据库操作代码凌乱，不是很方便后期维护

2、没有加入登录时的验证码输入操作，具体可以参考这篇博客https://cnodejs.org/topic/50f90d8edf9e9fcc58a5ee0b