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分享JSP下拉框选中一个获取的值，点查询为何只能查询第一页，点下一页又跳回到默认值了？
所属部门：<select name="departmentObj.departmentNo">
<option value="">不限制</option>
<%
for(Department departmentTemp:departmentList) {
%>
<option value="<%=departmentTemp.getDepartmentNo() %>"><%=departmentTemp.getDepartmentName() %></option>
<%
}
%>
</select>
设备名称:<input type=text name="deviceName" value="<%=deviceName %>" />
设备数量:<input type=text size="8" name="deviceNum" value="<%=deviceNum %>" />
设备状态：<select name="deviceStateObj.deviceStateId">
<option value="0">不限制</option>
<%
for(DeviceState deviceStateTemp:deviceStateList) {
%>
<option value="<%=deviceStateTemp.getDeviceStateId() %>"><%=deviceStateTemp.getDeviceState() %></option>
<%
}
%>
</select>
添加方式：<select name="addWayObj.addWayId">
<option value="0">不限制</option>
<%
for(AddWay addWayTemp:addWayList) {
%>
<option value="<%=addWayTemp.getAddWayId() %>"><%=addWayTemp.getAddWayName() %></option>
<%
}
%>
</select>
出厂日期:<input type=text readonly name="leaveFactoryDate" value="<%=leaveFactoryDate %>" onclick="setDay(this);"/>
<input type=hidden name=currentPage value="1" />
<input type=submit value="查询" />
</td>
Text文本框就可以，上述的添加方式，状态下拉框不行，第一页点查询后，点下一页有变成不限制了。第二页的数据没变，请各位解答啊。急急急
<option value="">不限制</option>
<%
for(Department departmentTemp:departmentList) {
%>
<option value="<%=departmentTemp.getDepartmentNo() %>"><%=departmentTemp.getDepartmentName() %></option>
<%
}
%>
</select>
设备名称:<input type=text name="deviceName" value="<%=deviceName %>" />
设备数量:<input type=text size="8" name="deviceNum" value="<%=deviceNum %>" />
设备状态：<select name="deviceStateObj.deviceStateId">
<option value="0">不限制</option>
<%
for(DeviceState deviceStateTemp:deviceStateList) {
%>
<option value="<%=deviceStateTemp.getDeviceStateId() %>"><%=deviceStateTemp.getDeviceState() %></option>
<%
}
%>
</select>
添加方式：<select name="addWayObj.addWayId">
<option value="0">不限制</option>
<%
for(AddWay addWayTemp:addWayList) {
%>
<option value="<%=addWayTemp.getAddWayId() %>"><%=addWayTemp.getAddWayName() %></option>
<%
}
%>
</select>
出厂日期:<input type=text readonly name="leaveFactoryDate" value="<%=leaveFactoryDate %>" onclick="setDay(this);"/>
<input type=hidden name=currentPage value="1" />
<input type=submit value="查询" />
</td>
Text文本框就可以，上述的添加方式，状态下拉框不行，第一页点查询后，点下一页有变成不限制了。第二页的数据没变，请各位解答啊。急急急
...全文
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xuteng1 2015-11-26
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<option value="<%=departmentTemp.getDepartmentNo() %>" <%if(department==departmentTemp) {%> <%="selected='selected'" %><%} %>><%=departmentTemp.getDepartmentName() %></option>
把这段代码替换就好使了
wjssoft_225 2015-11-26
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//获取所有的deviceClassObj信息
List<DeviceClass> deviceClassList = (List<DeviceClass>)request.getAttribute("deviceClassList");
DeviceClass deviceClass = (DeviceClass)request.getAttribute("deviceClass");
//获取所有的departmentObj信息
List<Department> departmentList = (List<Department>)request.getAttribute("departmentList");
Department department = (Department)request.getAttribute("department");
上面已经获取了
wjssoft_225 2015-11-26
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哪里不对，给指明下，修改哪里，我已经修改了好多次了
xuteng1 2015-11-26
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上面的代码稍微改改就好了有的地方写的不对大致就是这个意思
xuteng1 2015-11-26
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所属部门：<select name="departmentObj.departmentNo">
<option value="">不限制</option>
<%
for(Department departmentTemp:departmentList) {
%>
<option value="<%=departmentTemp.getDepartmentNo() %>" <%if(departmentTemp.getDepartmentNo() .equls((String)request.getAttribute("DepartmentNo"))){%><%=“selected='true'”%>><%=departmentTemp.getDepartmentName() %></option>
<%
}
%>
</select>
点击查询请求后台代码 request.setAttribute("DepartmentNo","select选中后带到后台来的值");
点击下一页的时候你必须带身上select选择的值在后台 request.setAttribute("DepartmentNo","select选中后带到后台来的值");
xuteng1 2015-11-26
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首先对于你后台代码
Department department = (Department)request.getAttribute("department");你的页面有这段代码
改成
Department department = (Department)request.getAttribute("departmentObj");
然后option里面改成10楼那样，再试试
wjssoft_225 2015-11-26
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换了还不行，
所属部门：<select name="departmentObj.departmentNo">
<option value="">不限制</option>
<%
for(Department departmentTemp:departmentList) {
%>
<option value="<%=departmentTemp.getDepartmentNo() %>" <%if(department==departmentTemp) {%> <%="selected='selected'" %><%} %>><%=departmentTemp.getDepartmentName() %></option>
<%
}
%>
wjssoft_225 2015-11-26
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前台点查询的时候的input
<input type=hidden name=currentPage value="1" />
<input type=submit value="查询" onclick="QueryDeviceInfo();"/>
wjssoft_225 2015-11-26
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后台查询代码
/*查询DeviceInfo信息*/
public String QueryDeviceInfo() {
if(currentPage == 0) currentPage = 1;
if(deviceNumber == null) deviceNumber = "";
if(deviceName == null) deviceName = "";
if(leaveFactoryDate == null) leaveFactoryDate = "";
List<DeviceInfo> deviceInfoList = deviceInfoDAO.QueryDeviceInfoInfo(deviceNumber, deviceClassObj, departmentObj, deviceName,deviceNum, deviceStateObj, addWayObj, leaveFactoryDate, currentPage);
/*计算总的页数和总的记录数*/
deviceInfoDAO.CalculateTotalPageAndRecordNumber(deviceNumber, deviceClassObj, departmentObj, deviceName, deviceNum,deviceStateObj, addWayObj, leaveFactoryDate);
/*获取到总的页码数目*/
totalPage = deviceInfoDAO.getTotalPage();
/*当前查询条件下总记录数*/
recordNumber = deviceInfoDAO.getRecordNumber();
ActionContext ctx = ActionContext.getContext();
ctx.put("deviceInfoList", deviceInfoList);
ctx.put("totalPage", totalPage);
ctx.put("recordNumber", recordNumber);
ctx.put("currentPage", currentPage);
ctx.put("deviceNumber", deviceNumber);
ctx.put("deviceClassObj", deviceClassObj);
DeviceClassDAO deviceClassDAO = new DeviceClassDAO();
List<DeviceClass> deviceClassList = deviceClassDAO.QueryAllDeviceClassInfo();
ctx.put("deviceClassList", deviceClassList);
ctx.put("departmentObj", departmentObj);
DepartmentDAO departmentDAO = new DepartmentDAO();
List<Department> departmentList = departmentDAO.QueryAllDepartmentInfo();
ctx.put("departmentList", departmentList);
ctx.put("deviceName", deviceName);
ctx.put("deviceNum", deviceNum);
ctx.put("deviceStateObj", deviceStateObj);
DeviceStateDAO deviceStateDAO = new DeviceStateDAO();
List<DeviceState> deviceStateList = deviceStateDAO.QueryAllDeviceStateInfo();
ctx.put("deviceStateList", deviceStateList);
ctx.put("addWayObj", addWayObj);
AddWayDAO addWayDAO = new AddWayDAO();
List<AddWay> addWayList = addWayDAO.QueryAllAddWayInfo();
ctx.put("addWayList", addWayList);
ctx.put("leaveFactoryDate", leaveFactoryDate);
return "query_view";
}
xuteng1 2015-11-26
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把你的页面后后台代码全贴出来我看下[/quote]
你换错代码了你看看十楼我给你回复的
xuteng1 2015-11-26
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把你的页面后后台代码全贴出来我看下
wjssoft_225 2015-11-26
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所属部门：<select name="departmentObj.departmentNo">
<option value="">不限制</option>
<%
for(Department departmentTemp:departmentList) {
%>
<option value="<%=departmentTemp.getDepartmentNo() %>"<%if(departmentTemp.getDepartmentNo() ==request.getAttribute("DepartmentNo")){%>
<%="selected='selected'" %><%}%>><%=departmentTemp.getDepartmentName() %></option>
<%
}
%>
</select
为什么还是会变回默认值，第二页查询不了条件的值，变回不限制了
xuteng1 2015-11-26
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这段代码 <option value="<%=departmentTemp.getDepartmentNo() %>" <%if(department==departmentTemp) {%> <%="selected='selected'" %><%} %>><%=departmentTemp.getDepartmentName() %></option>
替换
<select name="departmentObj.departmentNo">
<option value="">不限制</option>
<%
for(Department departmentTemp:departmentList) {
%>
<option value="<%=departmentTemp.getDepartmentNo() %>"><%=departmentTemp.getDepartmentName() %></option>
<%
}
%>
</select>
标红的地方[/quote]
如果还不行你只有把点击查询后的后台代码贴出来了
xuteng1 2015-11-26
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这段代码 <option value="<%=departmentTemp.getDepartmentNo() %>" <%if(department==departmentTemp) {%> <%="selected='selected'" %><%} %>><%=departmentTemp.getDepartmentName() %></option>
替换
<select name="departmentObj.departmentNo">
<option value="">不限制</option>
<%
for(Department departmentTemp:departmentList) {
%>
<option value="<%=departmentTemp.getDepartmentNo() %>"><%=departmentTemp.getDepartmentName() %></option>
<%
}
%>
</select>
标红的地方
wjssoft_225 2015-11-26
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换成那个代码还是不行
wjssoft_225 2015-11-26
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加完这个，上一页，下一页点不动了，而且下拉框点查询完还是变成不限制了
wjssoft_225 2015-11-26
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所属部门：<select name="departmentObj.departmentNo">
<option value="">不限制</option>
<%
for(Department departmentTemp:departmentList) {
%>
<option value="<%=departmentTemp.getDepartmentNo() %>"><%=departmentTemp.getDepartmentName() %></option>
<%
}
%>
</select>
请问，你这是代码是替换全部的这个部分吗？
Cx_轩 2015-11-26
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加个selected = selected
