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>
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() { } } ] });
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; }
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); }
<?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) >= DATE_FORMAT(#{subStartTime},'%Y%m%d') </if> <if test="subEndTime != null and subEndTime !=''"> and LEFT(createtime,8) <= 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>
具体的mybatis用法,可以自己查看其他博文。