关于报价系统的分页实现
1.分页实现的效果:
2,首先,在共享文件中定义了属性参数
private int pageindex; //begin:0
private int pagestart;
private int pagesize; 然后利用工具生成查询文件.xml
<select id="selectClientordersList" parameterType="Clientorders" resultType="Clientorders">
<![CDATA[select * from clientorders]]>
<where>
fast = 0
<if test="clientorderid != null">and clientorderid = #{clientorderid}</if>
<if test="clientid != null">and clientid = #{clientid}</if>
<if test="ordercode != null">and ordercode = #{ordercode}</if>
<if test="clientname != null">and clientname = #{clientname}</if>
<if test="clientcontacts != null">and clientcontacts = #{clientcontacts}</if>
<if test="seller != null">and seller = #{seller}</if>
<if test="projectname != null">and projectname = #{projectname}</if>
<if test="accuracytype != null">and accuracytype = #{accuracytype}</if>
<if test="assembly != null">and assembly = #{assembly}</if>
<if test="paint != null">and paint = #{paint}</if>
<if test="polish != null">and polish = #{polish}</if>
<if test="packaged != null">and packaged = #{packaged}</if>
<if test="price != null">and price = #{price}</if>
<if test="invoicetitle != null">and invoicetitle = #{invoicetitle}</if>
<if test="address != null">and address = #{address}</if>
<if test="invoice != null">and invoice = #{invoice}</if>
<if test="createtime != null">and createtime = #{createtime}</if>
<if test="begintime != null">and begintime = #{begintime}</if>
<if test="finshtime != null">and finshtime = #{finshtime}</if>
<if test="orderstatus != null">and orderstatus = #{orderstatus}</if>
<if test="material != null">and material = #{material}</if>
<if test="counts != null">and counts = #{counts}</if>
<if test="request != null">and request = #{request}</if>
<if test="ordermem != null">and ordermem = #{ordermem}</if>
</where>
<if test="pagesize > 0">
limit ${pagestart} ,${pagesize}
</if>
</select>注意:
<if test="pagesize > 0">
limit ${pagestart} ,${pagesize}
</if>是做分页的重要查询语句。
3,在查询方法getClientordersByWorkerid中编辑为:
@Override
public List<ClientordersBean> getClientordersByWorkerid(ClientordersBean workerid) {
ClientordersBean param = new ClientordersBean();
param.setWorkerid(workerid.getWorkerid());
param.setSearchkey(workerid.getSearchkey());
//分页判断
if (workerid.getPagesize()>0){
param.setPagesize(workerid.getPagesize());
param.setPageindex(workerid.getPageindex());
}
List<ClientordersBean> list;
try{
list = clientordersDao.selectClientordersListByWorkid(param);
}catch (Exception e){
e.printStackTrace();
list = new ArrayList<>();
}
return list;
}
4,然后在controller中对分页进行参数定义:
@RequestMapping(value = "/listOrders.act")
public String listOrders(
//定义参数P为分页页面
@RequestParam(value = "p",required = false,defaultValue = "0") int pageindex,
@RequestParam(value = "s",required = false,defaultValue = "") String searchkey,
@RequestParam(value = "i",required = false,defaultValue ="-1") int orderstatus){
getRequest().setAttribute("searchkey",searchkey);
if(getSessionUserinfo().getType() == 1){
ClientordersBean pageparam=new ClientordersBean();
pageparam.setClientorderid(getSessionUserinfo().getWid());
//设置每一页为25条数据
pageparam.setPagesize(25);
pageparam.setPageindex(pageindex);
if(orderstatus>-1) {
pageparam.setOrderstatus(orderstatus);
}
if(!searchkey.equals("")){
pageparam.setSearchkey(searchkey);
}
getRequest().setAttribute("list",ordersManager.getClientordersByWorkerid(pageparam));
}else if(getSessionUserinfo().getType() == 2){
ClientordersBean pageparam=new ClientordersBean();
pageparam.setPagesize(25);
pageparam.setPageindex(pageindex);
if(orderstatus>-1) {
pageparam.setOrderstatus(orderstatus);
}
if(!searchkey.equals("")){
pageparam.setSearchkey(searchkey);
}
getRequest().setAttribute("list",ordersManager.getAllClientorders(pageparam));
}else{
List<ClientordersBean> list = new ArrayList<>();
getRequest().setAttribute("list",list);
}
getRequest().setAttribute("orderStatus",orderstatus);
return "crm/orders/orderlist";
}
5,在jsp页面中先写一个获取分页数据的<script>,获取来自listOrders()方法中定义的参数P,并进行参数计算。
<script>
<c:choose>
<c:when test="${paramValues['p'][0] == null}">var p = 0;</c:when>
<c:otherwise>var p = ${paramValues['p'][0]};</c:otherwise>
</c:choose>
<c:choose>
<c:when test="${paramValues['s'][0] != null}">var s = "&s=${paramValues['s'][0]}";</c:when>
<c:otherwise>var s = '';</c:otherwise>
</c:choose>
<c:choose>
<c:when test="${paramValues['i'][0] == null}">var i = 0;</c:when>
<c:otherwise>var i = ${paramValues['i'][0]};</c:otherwise>
</c:choose>
function last() {
if(p>0){
i = $("#orderStatus").val();
self.location.href = "/crm/listOrders.act?p="+(p-1)+s;
}
}
function next() {
i = $("#orderStatus").val();
self.location.href = "/crm/listOrders.act?p="+(p+1)+s;
}
</script>6,在jsp中定义一个两个Button:
<div class="div-line">
<button type="button" <c:if test="${paramValues['p'][0] == null || paramValues['p'][0] > 0}">οnclick="last()"</c:if>>上一页</button>
<button type="button" <c:if test="${fn:length(list) == 25}">οnclick="next()"</c:if>>下一页</button>
</div>
这样就实现了分页的查询,这里的方法比较难看懂,主要是在前期数据库处理那里用到了工具方法,生成的
<if test="pagesize > 0">
limit ${pagestart} ,${pagesize}
</if>语句,这里主要是用于自己的工作总结,和公司的代码匹配,如果看不懂也是正常情况。这样就可以实现简单代码的分页效果啦:
数据库里面的订单按状态查询:
实现效果:
private Integer orderstatus; // 0:用户询价无下文 1:报价后客户不接受 2:无法满足客户需求无法 3:下单成功
步骤:
1,在controller的方法中定义获取状态的参数:
@RequestParam(value = "i",required = false,defaultValue ="-1") int orderstatus
@RequestMapping(value = "/listOrders.act")
public String listOrders(
@RequestParam(value = "p",required = false,defaultValue = "0") int pageindex,
@RequestParam(value = "s",required = false,defaultValue = "") String searchkey,
@RequestParam(value = "i",required = false,defaultValue ="-1") int orderstatus){
getRequest().setAttribute("searchkey",searchkey);
if(getSessionUserinfo().getType() == 1){
ClientordersBean pageparam=new ClientordersBean();
pageparam.setClientorderid(getSessionUserinfo().getWid());
pageparam.setPagesize(25);
pageparam.setPageindex(pageindex);
if(orderstatus>-1) {
pageparam.setOrderstatus(orderstatus);
}
if(!searchkey.equals("")){
pageparam.setSearchkey(searchkey);
}
getRequest().setAttribute("list",ordersManager.getClientordersByWorkerid(pageparam));
}else if(getSessionUserinfo().getType() == 2){
ClientordersBean pageparam=new ClientordersBean();
pageparam.setPagesize(25);
pageparam.setPageindex(pageindex);
//-1为查询全部的订单信息
if(orderstatus>-1) {
pageparam.setOrderstatus(orderstatus);
}
if(!searchkey.equals("")){
pageparam.setSearchkey(searchkey);
}
getRequest().setAttribute("list",ordersManager.getAllClientorders(pageparam));
}else{
List<ClientordersBean> list = new ArrayList<>();
getRequest().setAttribute("list",list);
}
//设置键值对,记住分页查询的状态
getRequest().setAttribute("orderStatus",orderstatus);
return "crm/orders/orderlist";
}
2,在jsp页面中写<jscrip>获取参数状态和实现按状态查询的分页,以及设置<select>选择后的跳转路径:
<script>
<c:choose>
<c:when test="${paramValues['p'][0] == null}">var p = 0;</c:when>
<c:otherwise>var p = ${paramValues['p'][0]};</c:otherwise>
</c:choose>
<c:choose>
<c:when test="${paramValues['s'][0] != null}">var s = "&s=${paramValues['s'][0]}";</c:when>
<c:otherwise>var s = '';</c:otherwise>
</c:choose>
<c:choose>
<c:when test="${paramValues['i'][0] == null}">var i = 0;</c:when>
<c:otherwise>var i = ${paramValues['i'][0]};</c:otherwise>
</c:choose>
function last() {
if(p>0){
i = $("#orderStatus").val();
self.location.href = "/crm/listOrders.act?p="+(p-1)+s+"&i="+i;
}
}
function next() {
i = $("#orderStatus").val();
self.location.href = "/crm/listOrders.act?p="+(p+1)+s+"&i="+i;
}
function Orderstatuschaxun(sobj) {
var status =sobj.options[sobj.selectedIndex].value;
if (status != "") {
self.location.href = "/crm/listOrders.act?p=0"+s+"&i="+status;
sobj.selectedIndex=0;
sobj.blur();
}
}
</script>
3,在jsp增加一个下拉列表,并传值给can参数i,i根据传入的参数做状态查询: pageparam.setOrderstatus(orderstatus);
<select οnchange=Orderstatuschaxun(this) name="select" id="orderStatus" >
<option value="" >请选择订单状态查询</option>
<option value="-1" <c:if test="${orderStatus == -1}">selected</c:if>>全部</option>
<option value="0" <c:if test="${orderStatus == 0}">selected</c:if>>客户询价</option>
<option value="1" <c:if test="${orderStatus == 1}">selected</c:if>>交涉中</option>
<option value="2" <c:if test="${orderStatus == 2}">selected</c:if>>询价无下文</option>
<option value="3" <c:if test="${orderStatus == 3}">selected</c:if>>报价后客户不接受</option>
<option value="4" <c:if test="${orderStatus == 4}">selected</c:if>>无法满足客户需求</option>
<option value="5" <c:if test="${orderStatus == 5}">selected</c:if>>打印中</option>
<option value="6" <c:if test="${orderStatus == 6}">selected</c:if>>打印失败重打</option>
<option value="7" <c:if test="${orderStatus == 7}">selected</c:if>>后期处理</option>
<option value="8" <c:if test="${orderStatus == 8}">selected</c:if>>发货中</option>
<option value="9" <c:if test="${orderStatus == 9}">selected</c:if>>交易完成</option>
</select>
这样就实现了按状态进行查询的效果:
关键点在于要在controller中得到状态信息,再根据jsp中传入的参数进行状态分配,然后实现不同的状态查询。
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