有人知道如何在JSP上使用Optional对象吗?
我有一堂课:
@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="${endCustomers}" itemValue="id" itemLabel="name"/>
</form:select>
</td>
由于明显的原因,该部分不起作用:
path="endCustomer.id"
有解决方法吗?
谢谢!
最佳答案
试试这个
<td>
<form:select class="form-control" id="endCustomer" path="${endCustomer.get().id}" tabindex="4">
<form:options items="${endCustomers}" itemValue="id" itemLabel="name"/>
</form:select>
</td>
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