项目用到ajax技术的查询，查询结果很多时候要分页展示。这两天摸索了一下，在这里做一总结，方便自己随时查看，

也方便后人参考。

这里的顺序遵从从前台页面到后台控制器，业务层，Dao层，Mapper

下面先讲页面，页面js代码如下：

<span style="font-size:14px;">/* 全局变量 */
var userCount;//符合查找条件的用户总页数，分页参考
var pageIndex = 0;//当前页，默认为0
var pageSize = 8;//每页显示个数为8

//按条件查找用户
function searchUser(index,size) {
	var findTerm = $("#serchTerm").val();
	var provinceId = $('#province').val();
	var cityId = $('#city').val();
	$.ajax({
		type : "POST",
		url : "user/findContactsAjax",
		cache : false,
		data : {
			provinceId : provinceId,
			cityId : cityId,
			pageIndex:index,
			pageSize:size
		},
		async : true,
		error : function() {
			alert("网络异常！");
		},
		success : function(data) {
		<span style="white-space:pre">	</span>userCount=Math.ceil(data[0].userCount/8);<span style="white-space:pre">													</span>var page='<div id="userPage" align="center" ><font size="2">共'
			+userCount+'页</font> <font size="2">第'
			+(pageIndex+1)+'页</font> <a href="javascript:void" onclick="GoToFirstPage()" id="aFirstPage" >首页</a> '
			+'<a href="javascript:void" onclick="GoToPrePage()" id="aPrePage"  >上一页</a>  '
			+'<a href="javascript:void" onclick="GoToNextPage()" id="aNextPage" >下一页</a>  '
			+'<a href="javascript:void" onclick="GoToEndPage()" id="aEndPage" >尾页</a>  ';
			page+='</div>';
			$("#serchResult").append(page);
			document.getElementById("dltitle").innerHTML = "查找结果如下";
			}
		}
	});
}
//首页
function GoToFirstPage() {
    pageIndex = 0;
    searchUser( pageIndex, pageSize);
}
//前一页
function GoToPrePage() {
    pageIndex -= 1;
    pageIndex = pageIndex >= 0 ? pageIndex : 0;
    searchUser( pageIndex, pageSize);
}
//后一页
function GoToNextPage() {
    if (pageIndex + 1 < userCount) {
        pageIndex += 1;
    }
        searchUser( pageIndex, pageSize);
}
//尾页
function GoToEndPage() {
    pageIndex = userCount - 1;
    searchUser( pageIndex, pageSize);
}</span>

@RequestMapping("findContactsAjax")
	public @ResponseBody
	Map<String, Object> findContactAjax(String provinceId,String cityId,String pageIndex,String pageSize) {
	
	List<User> listUsers = userDao.selectUserByProvinceAndCity(provinceId, cityId,pageIndex,pageSize)
		}
		
		map.put("user", listUsers);
		return map;
	}

Dao层：

List<User> selectUserByProvinceAndCity(@Param("provinceId") Integer provinceId, @Param("cityId") Integer cityId,
@Param("pageIndex") Integer pageIndex,@Param("pageSize") Integer pageSize);

<select id="selectUserByProvinceAndCity" resultMap="BaseResultMap">
		SELECT *,
		(SELECT  COUNT(*) FROM user_user_t 	
		province_id=#{provinceId}	
		 AND 
		city_id=#{cityId}) AS userCount
		FROM user_user_t
		province_id=#{provinceId}	
		 AND 
		city_id=#{cityId}
		LIMIT #{pageIndex},#{pageSize}
	</select>

User实体

public class User {
    private Integer userId;
    private String userName;
    private Integer provinceId;
    private Integer cityId;
    private Integer userCount;//满足查询条件的用户数目，作为分页的依据
	}

springMVC+ajax分页查询