小编Osc*_*erg的帖子

我是Spring MVC的新手.我正在编写一个使用Spring,Spring MVC和JPA/Hibernate的应用程序我不知道如何让Spring MVC设置一个从下拉到模型对象的值.我可以想象这是一个非常常见的场景

这是代码:

Invoice.java

@Entity
public class Invoice{    
    @Id
    @GeneratedValue
    private Integer id;

    private double amount;

    @ManyToOne(targetEntity=Customer.class, fetch=FetchType.EAGER)
    private Customer customer;

    //Getters and setters
}

Customer.java

@Entity
public class Customer {
    @Id
    @GeneratedValue
    private Integer id;

    private String name;
    private String address;
    private String phoneNumber;

    //Getters and setters
}

invoice.jsp

<form:form method="post" action="add" commandName="invoice">
    <form:label path="amount">amount</form:label>
    <form:input path="amount" />
    <form:label path="customer">Customer</form:label>
    <form:select path="customer" items="${customers}" required="true" itemLabel="name" itemValue="id"/>                
    <input type="submit" value="Add Invoice"/>
</form:form>

InvoiceController.java

@Controller
public class InvoiceController { …