Java SpringMVC 3转换<;表格:复选框..>;将字符串[]返回到实体对象
我有一个实体活动,与活动城市有一个OneTone关系。 反过来,活动城市包含一组城市 活动实体Java SpringMVC 3转换<;表格:复选框..>;将字符串[]返回到实体对象,java,spring-mvc,annotations,spring-3,Java,Spring Mvc,Annotations,Spring 3,我有一个实体活动,与活动城市有一个OneTone关系。 反过来,活动城市包含一组城市 活动实体 @Entity @javax.persistence.Table(uniqueConstraints={@UniqueConstraint(columnNames={"name","company_id"}), @UniqueConstraint(columnNames={"id"})}) public class Campaign implements Serializab
@Entity
@javax.persistence.Table(uniqueConstraints={@UniqueConstraint(columnNames={"name","company_id"}), @UniqueConstraint(columnNames={"id"})})
public class Campaign implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private Long id;
@NotEmpty
@Size(min=1, max=100)
private String name;
private Date startDate;
private Date endDate;
@Valid
private Deal deal;
@Valid
private Company company;
@OneToOne
private CampaignCities cities = new CampaignCities();
@Entity
public class CampaignCities {
private long id;
private Set<City> cities = new HashSet<City>();
@Id
@javax.persistence.GeneratedValue(strategy=GenerationType.AUTO)
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
@OneToMany
public Set<City> getCities() {
return cities;
}
public void setCities(Set<City> cities) {
this.cities = cities;
}
}
活动城市实体
@Entity
@javax.persistence.Table(uniqueConstraints={@UniqueConstraint(columnNames={"name","company_id"}), @UniqueConstraint(columnNames={"id"})})
public class Campaign implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private Long id;
@NotEmpty
@Size(min=1, max=100)
private String name;
private Date startDate;
private Date endDate;
@Valid
private Deal deal;
@Valid
private Company company;
@OneToOne
private CampaignCities cities = new CampaignCities();
@Entity
public class CampaignCities {
private long id;
private Set<City> cities = new HashSet<City>();
@Id
@javax.persistence.GeneratedValue(strategy=GenerationType.AUTO)
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
@OneToMany
public Set<City> getCities() {
return cities;
}
public void setCities(Set<City> cities) {
this.cities = cities;
}
}
我的新活动控制器
@SessionAttributes(value={"campaign", "campaignCities"})
@Controller
public class NewCampaignController {
//private static final Logger logger = LoggerFactory.getLogger(NewDealController.class);
@Autowired
private CampaignManager campaignManager;
@Autowired
private CityManager cityManager;
@Autowired
SimpleDateFormat dateFormat;
@Autowired
CustomDateEditor dateEditor;
@RequestMapping(value = "campaign/new", method = RequestMethod.GET)
public String showForm(Map<String, Object> model) {
//List<Campaign> campaigns = campaignManager.getCampaigns();
Campaign campaignForm = new Campaign();
CampaignCities cities = new CampaignCities();
cities.setCities(new HashSet<City>(cityManager.getCity()));
//campaignForm.setCities(cities);
model.put("campaignCities", cities);
model.put("campaign", campaignForm);
return "campaign/new";
}
@RequestMapping(value = "campaign/new", method = RequestMethod.POST)
public String processForm(@Valid Campaign campaignForm, BindingResult result, Map<String,Object> model) {
new CampaignValidator().validate(campaignForm, result);
if (result.hasErrors()) {
return "campaign/new";
}
this.campaignManager.saveCampaign(campaignForm);
model.put("campaign", campaignForm);
model.put("campaigns", this.campaignManager.getCampaigns());
return "campaign/added";
}
@SessionAttributes(值={“活动”、“活动城市”})
@控制器
公共类控制器{
//私有静态最终记录器Logger=LoggerFactory.getLogger(NewDealController.class);
@自动连线
私人竞选经理;
@自动连线
私人城市管理人城市管理人;
@自动连线
SimpleDataFormat日期格式;
@自动连线
自定义日期编辑器;
@RequestMapping(value=“campaign/new”,method=RequestMethod.GET)
公共字符串显示表单(地图模型){
//列出活动=活动管理器。getCampaigns();
活动形式=新活动();
活动城市=新活动城市();
cities.setCities(新的HashSet(cityManager.getCity());
//活动形式:setCities(城市);
模型。put(“活动城市”,城市);
示范投入(“活动”,活动形式);
返回“活动/新”;
}
@RequestMapping(value=“campaign/new”,method=RequestMethod.POST)
公共字符串processForm(@Valid Campaign campaignForm,BindingResult结果,映射模型){
新的活动验证器().validate(活动表单、结果);
if(result.hasErrors()){
返回“活动/新”;
}
此.campaignManager.saveCampaign(活动表单);
示范投入(“活动”,活动形式);
model.put(“活动”,this.campaigmanager.getcampaigments());
返回“活动/添加”;
}
我已经能够以一种形式呈现活动,并且我已经使用以下方法成功呈现了城市列表:
<form:checkboxes items="${campaignCities.cities}" path="cities" itemLabel="name" itemValue="id" delimiter="<br/>" />
但是,当我提交表单时,我得到以下验证错误
字段“cities”上的对象“campaign”中的字段错误:值被拒绝
[2,1];代码
[typeMismatch.campaign.cities,typeMismatch.cities,typeMismatch.com.groupdealclone.app.domain.CampaignCities,typeMismatch];
论据
[org.springframework.context.support.DefaultMessageSourceResolvable:
代码[活动.城市,城市];参数[];默认消息
[城市]];默认消息[无法转换类型的属性值]
“java.lang.String[]”转换为所需类型
房地产“城市”的“com.groupdealclone.app.domain.activationcities”;
嵌套异常为java.lang.IllegalStateException:无法转换
将[java.lang.String[]]类型的值转换为所需类型
[com.groupdealclone.app.domain.CampaignCities]用于属性“cities”:
找不到匹配的编辑器或转换策略]
我曾试图在SpringMVC 3中找到一种方法来处理这个问题,但我已经被困了一天多,没有成功。我只是想要一个列表或集合或城市,在表单上检查这些城市,然后提交给管理员并添加到活动中。我如何解决转换问题,在那里我可以转换字符串[]返回到一个列表或一组城市
我正在处理的项目是一个公共GitHub项目,如果您喜欢,可以下载源代码并使用Maven进行设置。该项目被称为,经过将近2天的时间,答案比我预期的要简单。多亏我被引导到了答案 在我的新活动中,我做到了:
@InitBinder
public void initBinder(WebDataBinder binder) {
dateFormat.setLenient(false);
binder.registerCustomEditor(Date.class, dateEditor);
binder.registerCustomEditor(CampaignCities.class, "cities", new PropertyEditorSupport() {
@Override
public void setAsText(String text) {
String [] ids = text.split(",");
CampaignCities cities = null;
for(String id:ids){
if(cities == null)
cities = new CampaignCities();
City city = cityManager.getCity(new Long(id));
if(city != null)
cities.getCities().add(city);
}
if(cities != null){
cities.setId(null);
setValue(cities);
}
}
});