有没有人知道如何在JSP上使用Optional对象?
我有一个班级:
@Entity
@Table(name = "projects")
public class Project {
@Expose
@ManyToOne
@JoinColumn(name = "customer_id")
private Customer endCustomer;
....
public Optional<Customer> getEndCustomer() {
return Optional.ofNullable(endCustomer);
}
public void setEndCustomer(Customer endCustomer) {
this.endCustomer = endCustomer;
}
....
}
我有jsp:
<td>
<form:select class="form-control" id="endCustomer" path="endCustomer.id" tabindex="4">
<form:options items="${endCustomers}" itemValue="id" itemLabel="name"/>
</form:select>
</td>
&#13;
这部分原因并不明显:path="endCustomer.id"
有解决方法吗? 谢谢!
答案 0 :(得分:1)
尝试这样的事情
<td>
<form:select class="form-control" id="endCustomer" path="${endCustomer.get().id}" tabindex="4">
<form:options items="${endCustomers}" itemValue="id" itemLabel="name"/>
</form:select>
</td>