easyui分页时，总页数出错

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错误出现

MyBatis用easyui写后台分页代码时，出现翻页后显示总页数错误

代码如下

可能原因在于后台mappers.xml里的sql语句错误

<select id="getProductTotal" parameterType="Map" resultType="Long">
select count(*) from t_product
<where>
<if test="name!=null and name!=''">
and name like #{name}
</if>
</where>
<if test="start!=null and size!=null">
limit #{start},#{size}
</if>
</select>

去掉limit语句

<select id="getProductTotal" parameterType="Map" resultType="Long">
select count(*) from t_product
<where>
<if test="name!=null and name!=''">
and name like #{name}
</if>
</where>
</select>

controller的代码如下

@RequestMapping("/list")
public String list(@RequestParam(value="page",required=false)String page,@RequestParam(value="rows",required=false)String rows,Product product,HttpServletResponse response)throws Exception{
PageBean pageBean = new PageBean(Integer.parseInt(page),Integer.parseInt(rows));
Map<String,Object> map = new HashMap<String,Object>();
map.put("name", StringUtil.formatLike(product.getName()));
map.put("start", pageBean.getStart());
map.put("size", pageBean.getPageSize());
List<Product> productList = productService.productList(map);
Long total = productService.getProductTotal(map);
JSONObject result=new JSONObject();
JsonConfig jsonConfig=new JsonConfig();
jsonConfig.setExcludes(new String[]{"orderProductList"});
jsonConfig.registerJsonValueProcessor(java.util.Date.class, new DateJsonValueProcessor("yyyy-MM-dd"));
jsonConfig.registerJsonValueProcessor(ProductBigType.class,new ObjectJsonValueProcessor(new String[]{"id","name"}, ProductBigType.class));
jsonConfig.registerJsonValueProcessor(ProductSmallType.class,new ObjectJsonValueProcessor(new String[]{"id","name"}, ProductSmallType.class));
JSONArray jsonArray=JSONArray.fromObject(productList,jsonConfig);
result.put("rows", jsonArray);
result.put("total", total);
ResponseUtil.write(response, result);
return null;
}