我有一个问题，javaScript如何将两个sepparate列表传递给spring控制器。在我的freeMarker模板上，我选择更改两个列表的集合。 这是两个列表的呈现：
编辑：我发现Jquery有Ui plagin
.sortable("toArray", { key: "id" })
方法，所以我将Id值添加到＆lt;李＆GT;标签
<div class="span5" id="listBox">
<h3>Assigned Servers</h3>
<#if assignedServers?has_content>
<ul id="sortable1" class="connectedSortable">
<#list assignedServers as responsible >
<li class="ui-state-default"
id="${responsible.id}" >${responsible.server_name}</li>
</#list>
</ul>
<#else>
<h4>This employee have no assigned servers yet.</h4>
</#if>
</div>
<div class="span5" id="listBox">
<h3>Available Servers</h3>
<#if availableServers?has_content>
<ul id="sortable2" class="connectedSortable">
<#list availableServers as available >
<li class="ui-state-default"
id="${available.id}" >${available.server_name}</li>
</#list>
</ul>
<#else>
<h4>There is no available servers to assign.</h4>
</#if>
</div>
编辑：我改变了JQuery功能：
<script>
$(function() {
var assigned = "";
var available = "";
$('#sortable1').sortable({
connectWith: '#sortable2',
update: function(event, ui) {
assigned = $(this).sortable("toArray", { key: "id" });
}
}).disableSelection();
$('#sortable2').sortable({
connectWith: '#sortable1',
update: function(event, ui) {
available = $(this).sortable("toArray", { key: "id" });
}
}).disableSelection();
$('#assign').click(function(){
$.ajax({
type: "POST",
url: "/ServerMonitoring/employee_management/serv_assignment/2",
data: JSON.stringify({
serversListModel: {
"assignedServers": assigned,
"availableServers": available
}
}),
datatype: "jsondata",
contentType: 'application/json',
success: function(data) {
alert("Success");
},
error: function (e) {
alert("Error: " + e);
}
});
return false;
});
//debugger
});
</script>
编辑：这是我的新弹簧控制器：
@RequestMapping(value = "/{id}", method = RequestMethod.POST)
public @ResponseBody ModelAndView onSubmit(
@ModelAttribute("serversListModel") ServersListModel serversListModel,
@PathVariable("id") Long responsibleId,
BindingResult result,
HttpServletRequest request,
HttpServletResponse response,
SessionStatus status) throws ParseException {
if (!result.hasErrors()) {
if (serversListModel.getAvailableServers() != null) {
for (String id : serversListModel.getAvailableServers()) {
ServerEntity entity = employeeService.getServerById((long)Integer.parseInt(id));
entity.setResponsible(responsibleId);
adminService.updateServer(entity);
}
}
if (serversListModel.getAssignedServers() != null) {
for (String id : serversListModel.getAssignedServers()) {
ServerEntity entity = employeeService.getServerById((long)Integer.parseInt(id));
entity.setResponsible((long) 0);
adminService.updateServer(entity);
}
}
status.setComplete();
return new ModelAndView("redirect:/employee_management/employee_manager");
} else {
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
return new ModelAndView("redirect:/employee_management/serv_assignment");
}
}
EDITED：new ServersListModel - 它是一个带有两个vars的简单POJO
public class ServersListModel {
private List<String> assignedServers;
private List<String> availableServers;
...
}
通过在FireBug中调试JSON传递的字符串：
{"serversListModel":{"assignedServers":["2","4"],"availableServers":["1","5","3","6","7","8"]}}
但是，我仍然无法恢复该字符串，我的模型中的变量stil在debuging中包含NULL。 将@RequestBody anotation置于@ModelAttribute（“serversListModel”）的位置使得Jquery抛出BadRequest错误。 如果，在方法体内，我调用
String jsonBody = IOUtils.toString(request.getInputStream());
它将返回带有requerd id的JSON String对象，所以我很接近回答。
请帮我查一下Controller中的错误。谢谢。
答案 0 :(得分：0)
我设法解决了我的问题，我想与您分享解决方案：
我将模型更改为Long类型：
public class ServersListModel {
private List<Long> assignedServers;
private List<Long> availableServers;
然后我添加了Maven依赖：
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
并将Jackson配置为：
<bean id="jacksonMessageConverter"
class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="jacksonMessageConverter" />
</list>
</property>
</bean>
<bean id="defaultViews"
class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
（如果所有这些都很重要，我就不会因此而死）。）
Naw my JQury.Ajax脚本看起来像这样：
$(function() {
var assigned = "";
var available = "";
$('#sortable1').sortable({
connectWith: '#sortable2',
dropOnEmpty: true,
update: function(event, ui) {
assigned = $(this).sortable("toArray", { key: "id" });
}
}).disableSelection();
$('#sortable2').sortable({
connectWith: '#sortable1',
dropOnEmpty: true,
update: function(event, ui) {
available = $(this).sortable("toArray", { key: "id" });
}
}).disableSelection();
$('#assign').click(function(){
$.ajax({
type: "POST",
url: "/ServerMonitoring/employee_management/serv_assignment/2",
data: JSON.stringify({
assignedServers: assigned,
availableServers: available
}),
datatype: "json",
'scriptCharset': "utf-8",
'contentType': "application/json;charset=UTF-8",
success: function(data) {
//alert("Success");
},
error: function (e) {
//alert("Error: " + e);
}
});
return false;
});
//debugger
});
最终我的MVC控制器：
@RequestMapping(value = "/{id}", method = RequestMethod.POST)
public @ResponseBody ModelAndView onSubmit(
@RequestBody ServersListModel serversListModel,
@PathVariable("id") Long responsibleId,
BindingResult result,
SessionStatus status) throws ParseException, IOException {
if (!result.hasErrors()) {
if (serversListModel.getAssignedServers() != null) {
for (Long id : serversListModel.getAssignedServers()) {
ServerEntity entity = employeeService.getServerById(id);
entity.setResponsible(responsibleId);
adminService.updateServer(entity);
}
}
if (serversListModel.getAvailableServers() != null) {
for (Long id : serversListModel.getAvailableServers()) {
ServerEntity entity2 = employeeService.getServerById(id);
entity2.setResponsible((long) 0);
adminService.updateServer(entity2);
}
}
status.setComplete();
return new ModelAndView("redirect:/employee_management/employee_manager");
} else {
return new ModelAndView("redirect:/employee_management/serv_assignment");
}
}
一切都很完美。享受!!!