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  • SpringMVC结合easyUI中datagird实现分页

    SpringMVC结合easyUI中datagird实现分页

      DataGrid以表格形式展示数据,并提供了丰富的选择、排序、分组和编辑数据的功能支持。轻量级,单元格合并、多列标题、冻结列和页脚只是其中一小部分功能。

    一、提前

      1、SpringMVC注解@RequestMapping(value = "/listUser.htm"),返回值ModelView,解析返回一页面。 注解@ResponseBody用于返回一个模型对象(数据结构),如JSONObject,自定义DataGrid…… 等等。

      2、需要引入相应的js和css,这是利用

    <link rel="stylesheet" type="text/css"href="js/themes/default/easyui.css" />
    <script type="text/javascript" src="/js/jquery.min.js"></script>
    <script type="text/javascript" src="js/jquery.easyui.min.1.2.2.js"></script>
    <script type="text/javascript" src="js/json2.js"></script>  
    引入文件

    datagrid中以及其他easyui元素文字默认都是英文,如果换成中文引入easyui-lang-zh_CN.js

      3、加载DataGrid时,回台接收page=1$rows=10的参数数据,可以通过request.getParamter()函数获取参数,也可以定义到函数参数中,如下图:

    @RequestMapping(value = "/queryListUser.json")
        @ResponseBody
        public DataGrid quyerListUser(HttpServletRequest request,
                HttpServletResponse response, int page, int rows) {
             }

    二、DataGrid简述及实现

    下面为一种方法定义datagrid,在js中声名,也可以在table节点中定义。

    $('#userGrid').datagrid({
                loadMsg : '数据加载中....',
                title : "管理员信息一览表",
                url : '/queryListUser.json',
                method : 'POST',
                queryParams : {
                    'params' : JSON.stringify(params)
                },
                striped : true, //设置为true将交替显示行背景。相邻行不同颜色
                //fit:false,//自适应大小
                //fitColumns:true,//列宽适应浏览器,无左右滚动条
                rownumbers : true,//行number
                pagination : true,//显示页码
                pageSize : 10,//初始化每页显示的条数
                pageList : [ 10, 20, 50, 100 ],//可以调节的每页显示条数
                columns : [ [ {
                    field : 'ck',
                    width : fixWidth(0.05),
                    checkbox : true
                }, {
                    field : 'username',
                    title : '用户名',
                    width : 300,
                    sortable : true,
                    align : 'center'
                }, {
                    field : 'password',
                    title : '密码',
                    width : 100,
                    sortable : true,
                    align : 'center'
                }, {
                    field : 'usertype',
                    title : '类型',
                    width : 300,
                    sortable : true,
                    align : 'center',
                    formatter : typeColumnsFormatter
                }, {
                    field : 'createtime',
                    title : '创建时间',
                    width : 100,
                    sortable : true,
                    align : 'center',
                    formatter : timeColumnsFormatter
                } ] ],
                sortOrder : "desc",
                sortName : "createtime", //初始化时按Id升序排序
                toolbar : [ {
                    iconCls : 'icon-add',
                    text : '添加',
                    handler : function() {
                        alert('Add')
                    }
                }, '-', { //分隔符
                    iconCls : 'icon-edit',
                    text : '编辑',
                    handler : function() {
                        alert('edit')
                    }
                }, '-', {
                    iconCls : 'icon-remove',
                    text : '删除',
                    handler : function() {
                        alert('delete')
                    }
                }, '-', {
                    iconCls : 'icon-search',
                    text : '查询',
                    handler : function() {
                        
                    }
                } ]
            });
    DataGrid

    注意:pageSize : 10,//初始化每页显示的条数,不起作用, jquey easyui 版本问题, 统一修改为1.5的版本。

    针对其属性可以找api文档进行了解。

    三、后台实现

    1、通过传递前台page,rows,sort,order,后台拼接sql语句进行数据的分页、排序。每次下一页、上一页等操作都会传递后台这些参数;

    /**
         * shopUser分页查询
         * 
         * @param request
         * @param response
         * @param page
         *            页码 参数传递或者getParameter()
         * @param rows
         *            每页的大小(条数)
         * @return
         */
        @RequestMapping(value = "/queryListUser.json")
        @ResponseBody
        public DataGrid quyerListUser(HttpServletRequest request,
                HttpServletResponse response, int page, int rows) {
            String paramsObj = request.getParameter("params");
            String sort = request.getParameter("sort");//默认排序列名称
            String order = request.getParameter("order");//排序方式
            JSONObject paramsJson = JSONObject.fromObject(paramsObj);
            int start = (page - 1) * rows; // limit 开始位置
            int nums = rows; // limit 查询数量
            paramsJson.put("start", start);
            paramsJson.put("nums", nums);
            if(StringUtils.isNotBlank(sort)){
                paramsJson.put("sortName", sort);
            }else{
                paramsJson.put("sortName", "userid");
            }
            if(StringUtils.isNotBlank(order)){
                paramsJson.put("sortOrder", order);
            }else{
                paramsJson.put("sortOrder", "asc");
            }
            
            List<ShopUser> shopUsers = new ArrayList<ShopUser>();
            int total = rows;
            try {
                shopUsers = shopUserService.quyeryShopUserWithPage(paramsJson);
                total = shopUserService.quyerForCount(paramsJson);
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }
    
            if (shopUsers != null && shopUsers.size() > 0) {
    
            }
            DataGrid dataGrid = new DataGrid();
            dataGrid.setRows(shopUsers);
            dataGrid.setTotal(total);
            return dataGrid;
        }
    queryList

    返回值shopUsers为数据对象,和total查询数量;返回到前台展示页码和条数。

    2、这里我使用的MyBatis+Mysql,通过limit实现查询分页

    @Repository(value="shopUserMapper")
    public interface ShopUserMapper {
        int deleteByPrimaryKey(Integer userid);
    
        int insert(ShopUser record);
    
        //选择性新增
        int insertSelective(ShopUser record);
    
        ShopUser selectByPrimaryKey(Integer userid);
        
        List<ShopUser> selectByName(String name);
    
        int updateByPrimaryKeySelective(ShopUser record);
    
        int updateByPrimaryKey(ShopUser record);
        
        List<ShopUser> queryWithPage(JSONObject jsonObject);
        
        int queryForCount(JSONObject paramsJson);
    }
    ShopUserMapper.java
    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
    <mapper namespace="com.shop.web.dao.ShopUserMapper">
        <resultMap id="BaseResultMap" type="com.shop.web.entity.ShopUser">
            <id column="userid" property="userid" jdbcType="INTEGER" />
            <result column="username" property="username" jdbcType="VARCHAR" />
            <result column="password" property="password" jdbcType="VARCHAR" />
            <result column="usertype" property="usertype" jdbcType="INTEGER" />
            <result column="createtime" property="createtime" jdbcType="BIGINT" />
        </resultMap>
         <!-- 定义查询结果列 -->
        <sql id="Base_Column_List">
            userid, username, password, usertype, createtime
        </sql>
    
        <!-- 分页查询 -->
        <select id="queryWithPage" resultMap="BaseResultMap">
            select
            <include refid="Base_Column_List"></include>
            from shop_user
            <trim prefix="where 1=1">
                <if test="userid != null and userid !=''">
                    and userid = #{userid,jdbcType=INTEGER}
                </if>
                <if test="username != null and username != ''">
                    and username = #{username,jdbcType=VARCHAR}
                </if>
                <if test="subStartTime != null and subStartTime !=''">
                    and LEFT(createtime,8) &gt;= DATE_FORMAT(#{subStartTime},'%Y%m%d')
                </if>
                <if test="subEndTime != null and subEndTime !=''">
                    and LEFT(createtime,8) &lt;= DATE_FORMAT(#{subEndTime},'%Y%m%d')
                </if>
                order by ${sortName} ${sortOrder}
            </trim>
            <trim>
                <if test="start != null and nums != null">
                    limit #{start,jdbcType=INTEGER},#{nums,jdbcType=INTEGER}
                </if>
            </trim>
        </select>
    
        <!-- 查询所有count -->
        <select id="queryForCount" resultType="Integer">
            select count(1) as counts from shop_user
            <trim prefix="where 1=1">
                <if test="userid != null">
                    and userid = #{userid,jdbcType=INTEGER}
                </if>
                <if test="username != null">
                    and username = #{username,jdbcType=VARCHAR}
                </if>
            </trim>
        </select>
    
        <!-- 通过id查询数据 -->
        <select id="selectByPrimaryKey" resultMap="BaseResultMap"
            parameterType="java.lang.Integer">
            select
            <include refid="Base_Column_List" />
            from shop_user
            where userid = #{userid,jdbcType=INTEGER}
        </select>
    
        <!-- 通过name查询数据 -->
        <select id="selectByName" resultMap="BaseResultMap"
            parameterType="java.lang.String">
            select
            <include refid="Base_Column_List" />
            from shop_user
            where username = #{username,jdbcType=VARCHAR}
        </select>
    
        <!-- 删除数据 -->
        <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
            delete from shop_user
            where userid = #{userid,jdbcType=INTEGER}
        </delete>
    
        <!-- 新增 -->
        <insert id="insert" parameterType="com.shop.web.entity.ShopUser">
            insert into shop_user (userid, username, password,
            usertype, createtime)
            values (#{userid,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR},
            #{password,jdbcType=VARCHAR},
            #{usertype,jdbcType=INTEGER}, #{createtime,jdbcType=BIGINT})
        </insert>
    
        
        <!-- 选择性的新增 -->
        <insert id="insertSelective" parameterType="com.shop.web.entity.ShopUser">
            <selectKey keyProperty="userid" resultType="Integer">
                select LAST_INSERT_ID()
            </selectKey>
            insert into shop_user
            <trim prefix="(" suffix=")" suffixOverrides=",">
                <if test="username != null">
                    username,
                </if>
                <if test="password != null">
                    password,
                </if>
                <if test="usertype != null">
                    usertype,
                </if>
                <if test="createtime != null">
                    createtime,
                </if>
            </trim>
            <trim prefix="values (" suffix=")" suffixOverrides=",">
                <if test="username != null">
                    #{username,jdbcType=VARCHAR},
                </if>
                <if test="password != null">
                    #{password,jdbcType=VARCHAR},
                </if>
                <if test="usertype != null">
                    #{usertype,jdbcType=INTEGER},
                </if>
                <if test="createtime != null">
                    #{createtime,jdbcType=BIGINT},
                </if>
            </trim>
        </insert>
    
        <update id="updateByPrimaryKeySelective" parameterType="com.shop.web.entity.ShopUser">
            update shop_user
            <set>
                <if test="username != null">
                    username = #{username,jdbcType=VARCHAR},
                </if>
                <if test="password != null">
                    password = #{password,jdbcType=VARCHAR},
                </if>
                <if test="usertype != null">
                    usertype = #{usertype,jdbcType=INTEGER},
                </if>
                <if test="createtime != null">
                    createtime = #{createtime,jdbcType=BIGINT},
                </if>
            </set>
            where userid = #{userid,jdbcType=INTEGER}
        </update>
        <update id="updateByPrimaryKey" parameterType="com.shop.web.entity.ShopUser">
            update shop_user
            set username = #{username,jdbcType=VARCHAR},
            password = #{password,jdbcType=VARCHAR},
            usertype = #{usertype,jdbcType=INTEGER},
            createtime = #{createtime,jdbcType=BIGINT}
            where userid = #{userid,jdbcType=INTEGER}
        </update>
    </mapper>
    ShopUserMapper.xml

    具体的mybatis用法,可以自己查看其他博文。

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  • 原文地址:https://www.cnblogs.com/drubber/p/6185785.html
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