SpringMVC結合easyUI中datagird實現分頁
DataGrid以表格形式展示數據,並提供了豐富的選擇、排序、分組和編輯數據的功能支持。輕量級,單元格合並、多列標題、凍結列和頁腳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,解析返回一頁面。 注解@ResponseBody用於返回一個模型對象(數據結構),如JSONObject,自定義DataGrid…… 等等。
2、需要引入相應的js和css,這是利用
<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元素文字默認都是英文,如果換成中文引入easyui-lang-zh_CN.js
3、加載DataGrid時,回台接收page=1$rows=10的參數數據,可以通過request.getParamter()函數獲取參數,也可以定義到函數參數中,如下圖:
@RequestMapping(value = "/queryListUser.json") @ResponseBody public DataGrid quyerListUser(HttpServletRequest request, HttpServletResponse response, int page, int rows) { }
二、DataGrid簡述及實現
下面為一種方法定義datagrid,在js中聲名,也可以在table節點中定義。
$('#userGrid').datagrid({
loadMsg : '數據加載中....',
title : "管理員信息一覽表",
url : '/queryListUser.json',
method : 'POST',
queryParams : {
'params' : JSON.stringify(params)
},
striped : true, //設置為true將交替顯示行背景。相鄰行不同顏色
//fit:false,//自適應大小
//fitColumns:true,//列寬適應瀏覽器,無左右滾動條
rownumbers : true,//行number
pagination : true,//顯示頁碼
pageSize : 10,//初始化每頁顯示的條數
pageList : [ 10, 20, 50, 100 ],//可以調節的每頁顯示條數
columns : [ [ {
field : 'ck',
width : fixWidth(0.05),
checkbox : true
}, {
field : 'username',
title : '用戶名',
width : 300,
sortable : true,
align : 'center'
}, {
field : 'password',
title : '密碼',
width : 100,
sortable : true,
align : 'center'
}, {
field : 'usertype',
title : '類型',
width : 300,
sortable : true,
align : 'center',
formatter : typeColumnsFormatter
}, {
field : 'createtime',
title : '創建時間',
width : 100,
sortable : true,
align : 'center',
formatter : timeColumnsFormatter
} ] ],
sortOrder : "desc",
sortName : "createtime", //初始化時按Id升序排序
toolbar : [ {
iconCls : 'icon-add',
text : '添加',
handler : function() {
alert('Add')
}
}, '-', { //分隔符
iconCls : 'icon-edit',
text : '編輯',
handler : function() {
alert('edit')
}
}, '-', {
iconCls : 'icon-remove',
text : '刪除',
handler : function() {
alert('delete')
}
}, '-', {
iconCls : 'icon-search',
text : '查詢',
handler : function() {
}
} ]
});
注意:pageSize : 10,//初始化每頁顯示的條數,不起作用, jquey easyui 版本問題, 統一修改為1.5的版本。
針對其屬性可以找api文檔進行了解。
三、后台實現
1、通過傳遞前台page,rows,sort,order,后台拼接sql語句進行數據的分頁、排序。每次下一頁、上一頁等操作都會傳遞后台這些參數;
/** * shopUser分頁查詢 * * @param request * @param response * @param page * 頁碼 參數傳遞或者getParameter() * @param rows * 每頁的大小(條數) * @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");//默認排序列名稱 String order = request.getParameter("order");//排序方式 JSONObject paramsJson = JSONObject.fromObject(paramsObj); int start = (page - 1) * rows; // limit 開始位置 int nums = rows; // limit 查詢數量 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為數據對象,和total查詢數量;返回到前台展示頁碼和條數。
2、這里我使用的MyBatis+Mysql,通過limit實現查詢分頁
@Repository(value="shopUserMapper") public interface ShopUserMapper { int deleteByPrimaryKey(Integer userid); int insert(ShopUser record); //選擇性新增 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>
<!-- 定義查詢結果列 -->
<sql id="Base_Column_List">
userid, username, password, usertype, createtime
</sql>
<!-- 分頁查詢 -->
<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>
<!-- 查詢所有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>
<!-- 通過id查詢數據 -->
<select id="selectByPrimaryKey" resultMap="BaseResultMap"
parameterType="java.lang.Integer">
select
<include refid="Base_Column_List" />
from shop_user
where userid = #{userid,jdbcType=INTEGER}
</select>
<!-- 通過name查詢數據 -->
<select id="selectByName" resultMap="BaseResultMap"
parameterType="java.lang.String">
select
<include refid="Base_Column_List" />
from shop_user
where username = #{username,jdbcType=VARCHAR}
</select>
<!-- 刪除數據 -->
<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>
<!-- 選擇性的新增 -->
<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>
具體的mybatis用法,可以自己查看其他博文。
