Java MVC和带有集合的对象<&燃气轮机;
我有两个类映射到Hibernate中。Java MVC和带有集合的对象<&燃气轮机;,java,spring,hibernate,jsp,spring-mvc,Java,Spring,Hibernate,Jsp,Spring Mvc,我有两个类映射到Hibernate中。 1.该类实现了帐户 2.该类实现帐户的类型。 重要!一个帐户可以有多种类型 Account.class @Entity @Table(name = "dp_account", uniqueConstraints={@UniqueConstraint(columnNames={"id"})}) public class Account { @Id @C
1.该类实现了帐户
2.该类实现帐户的类型。
重要!一个帐户可以有多种类型
Account.class
@Entity
@Table(name = "dp_account",
uniqueConstraints={@UniqueConstraint(columnNames={"id"})})
public class Account {
@Id
@Column(name="id", nullable = false, unique = true, length = 11)
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@Column(name = "price", nullable = false)
private int price;
@Column(name = "customer_id", nullable = false, unique = true, length = 11)
private long customerId;
@Column(name = "customer", length = 100, nullable = false, unique = true)
private String customer;
@Column(name = "comment", length = 1000)
private String comment;
@Column(name = "date", columnDefinition="TIMESTAMP")
@Temporal(TemporalType.TIMESTAMP)
private Date date;
@Column(name = "is_deleted", nullable = false)
private boolean deleted = false;
@ManyToMany(fetch = FetchType.EAGER, targetEntity = AccountType.class, cascade = { CascadeType.ALL })
@JoinTable(name = "account_accountType",
joinColumns = { @JoinColumn(name = "account_id") },
inverseJoinColumns = { @JoinColumn(name = "type_id") })
private Set<AccountType> accountTypes;
// дальше конструкторы и геттеры/сеттеры
}
问题是-有一个页面,我填写表格创建帐户
(Account.class
),我会选择多个来填充帐户类型
(AccountType.class
)。Account.class已设置字段<代码>
更新:
@RequestMapping(value = "/welcome", method = RequestMethod.GET)
public ModelAndView welcomePage() {
ModelAndView model = new ModelAndView();
List<GrantedAuthority> grantedAuthorityList = (List<GrantedAuthority>) SecurityContextHolder.getContext().getAuthentication().getAuthorities();
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
String login = authentication.getName();
if (grantedAuthorityList.contains(new SimpleGrantedAuthority("ROLE_ADMIN"))) {
model.setViewName("admin");
} else {
List<AccountType> accountTypes = ServiceFactory.getInstance().getAccountService().getAllAccountTypeByLogin(login);
model.addObject("accountTypes", accountTypes);
model.setViewName("user");
}
return model;
}
@RequestMapping(value=“/welcome”,method=RequestMethod.GET)
公共模型和视图welcomePage(){
ModelAndView模型=新的ModelAndView();
List grantedAuthorityList=(List)SecurityContextHolder.getContext().getAuthentication().GetAuthority();
身份验证=SecurityContextHolder.getContext().getAuthentication();
String login=authentication.getName();
if(grantedAuthorityList.contains(新的SimpleGrantedAuthority(“角色\管理员”)){
model.setViewName(“管理员”);
}否则{
List accountTypes=ServiceFactory.getInstance().getAccountService().getAllAccountTypeByLogin(登录名);
model.addObject(“accountTypes”,accountTypes);
model.setViewName(“用户”);
}
收益模型;
}
您正在使用html select元素,但您需要做的是使用spring标记库的select,即:
<form:select path="accountTypes" multiple="true">
<form:options items="${accountTypes}"/>
</form:select>
这样,spring将绑定控制器中的值
试试这个
@RequestMapping(value = "/welcome", method = RequestMethod.GET)
public ModelAndView welcomePage() {
ModelAndView model = new ModelAndView();
List<GrantedAuthority> grantedAuthorityList = (List<GrantedAuthority>) SecurityContextHolder.getContext().getAuthentication().getAuthorities();
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
String login = authentication.getName();
if (grantedAuthorityList.contains(new SimpleGrantedAuthority("ROLE_ADMIN"))) {
model.setViewName("admin");
} else {
List<AccountType> accountTypes = ServiceFactory.getInstance().getAccountService().getAllAccountTypeByLogin(login);
model.addObject("accountTypes", accountTypes);
model.setViewName("user");
//Add here
model.addObject("accountAttribute", new Account());
}
return model;
}
@RequestMapping(value=“/welcome”,method=RequestMethod.GET)
公共模型和视图welcomePage(){
ModelAndView模型=新的ModelAndView();
List grantedAuthorityList=(List)SecurityContextHolder.getContext().getAuthentication().GetAuthority();
身份验证=SecurityContextHolder.getContext().getAuthentication();
String login=authentication.getName();
if(grantedAuthorityList.contains(新的SimpleGrantedAuthority(“角色\管理员”)){
model.setViewName(“管理员”);
}否则{
List accountTypes=ServiceFactory.getInstance().getAccountService().getAllAccountTypeByLogin(登录名);
model.addObject(“accountTypes”,accountTypes);
model.setViewName(“用户”);
//加在这里
addObject(“accountAttribute”,new Account());
}
收益模型;
}
问题在于,您需要注册一个属性编辑器或转换器,该编辑器或转换器能够将您的帐户类型名称转换为AccountType对象。您的视图发送accountTypes元素的字符串值。Spring需要知道如何将字符串值绑定到对象
public class AccountTypeEditor extends PropertyEditorSupport{
public void setAsText(String text){
AccountType accountType = // some logic to find account type by name
setValue(accountType);
}
}
在控制器中,需要@InitBinder方法来注册编辑器
@InitBinder
public void initBinder(WebDataBinder binder){
binder.registerCustomEditor(AccountType.class , new AccountTypeEditor());
}
}我能够解决这个问题,我开始分别传递Set和object本身帐户。问题是,我从jsp帐户传递,我想设置,这是不可能的,因为我只选择了名称类型帐户。这是我的问题的解决方案:
JSP:
Сумма:
${accountType}
Комментарий:
控制器:
@RequestMapping(value = "/account/addAccount", method = RequestMethod.POST)
public void addAccount(@ModelAttribute("accountAttribute") Account account, @RequestParam(value="accountTypeNameSet") Set<String> accountTypeNameSet) {
// implementation here
// accountTypeNameSet - This is the list of names account type, which user selected. On the basis of these names we can pull your invoice from database.
@RequestMapping(value=“/account/addAccount”,method=RequestMethod.POST)
public void addAccount(@modeldattribute(“accountAttribute”)Account Account,@RequestParam(value=“accountTypeNameSet”)Set accountTypeNameSet){
//在这里实现
//accountTypeNameSet-这是用户选择的帐户类型名称列表。根据这些名称,我们可以从数据库中提取您的发票。
谢谢您的回答,但当我使用您的解决方案时,我遇到了一个问题“java.lang.IllegalStateException:bean名称“accountAttribute”的BindingResult和普通目标对象都不能作为请求属性使用”这可能是因为您没有将accountAttribute添加到控制器中的模型中,该模型返回您作为屏幕截图附加的页面。请在我的问题中查看MVC控制器。我认为我添加了accountAttribute。我错了吗?您发布的控制器方法映射到您附加页面的提交操作,对吗?我说的是让你进入表单页面的控制器功能的变化。你看到我更新的答案了吗?老实说,我真的不明白这个控制器是什么。我有一个表单,它创建了一个对象,并为这个控制器做了什么?如果有兴趣,我能够解决这个问题。我做了一个replY
public class AccountTypeEditor extends PropertyEditorSupport{
public void setAsText(String text){
AccountType accountType = // some logic to find account type by name
setValue(accountType);
}
}
@InitBinder
public void initBinder(WebDataBinder binder){
binder.registerCustomEditor(AccountType.class , new AccountTypeEditor());
}
<form:form action="${pageContext.request.contextPath}/account/addAccount" method="post" modelAttribute="accountAttribute">
<label>
Сумма: <input type="number" name="price">
</label>
<br> <br>
<select multiple name="accountTypeNameSet" size="4s">
<c:forEach items="${accountTypes}" var="accountType">
<option >${accountType}</option>
</c:forEach>
</select>
<label>Комментарий:
<br> <br>
<textarea name="comment" rows="5" cols="30"></textarea>
</label>
<br><br>
<input type="submit" value="Внести">
</form:form>
@RequestMapping(value = "/account/addAccount", method = RequestMethod.POST)
public void addAccount(@ModelAttribute("accountAttribute") Account account, @RequestParam(value="accountTypeNameSet") Set<String> accountTypeNameSet) {
// implementation here
// accountTypeNameSet - This is the list of names account type, which user selected. On the basis of these names we can pull your invoice from database.