[ Spring 3.0.5] [jboss 5.1]
A有两个类
public class User {
private String name;
private String surname;
private Address address;
...
sets and gets
setters and getters
}
public class Address {
private String street;
...
setters and getters
}
在 Controller 中我有这段代码:
@Controller
public class MyController {
@RequestMapping(value = "/index")
public ModelAndView showForm() {
ModelAndView mav = new ModelAndView();
mav.setViewName("index");
User user = new User();
Address adr = new Address();
mav.addObject("user", user);
mav.addObject("adr", adr);
}
现在我想在 JSP 中使用两个输入元素创建
<%@taglib uri="http://www.springframework.org/tags" prefix="spring"%> <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html><head><body>
<form:form method="POST" commandName="user">
<form:label path="name" />
<form:input path="name" />
<form:label path="adr.street" />
<form:input path="adr.street" />
</form:form>
</body>
</html>
当我运行一个像这样的异常时:
org.springframework.beans.NotReadablePropertyException: Invalid property 'adr' of bean class [form.User]: Bean property 'adr' is not readable or has an invalid getter method: Does the return type of the getter 匹配参数二传手的类型？ org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:707) org.springframework.be
有人可以向我解释为什么以及如何改进代码吗？
最佳答案
将您的对象包装在包装器表单类中并将其传递到模型中。
public class MyForm
{
public user;
public address;
// getters, setters, etc.
}
然后
ModelAndView mav = new ModelAndView(); // ModelAndView
mav.addObject("myForm", new MyForm()); // e.g.
在您的模型中，地址应该附加到用户吗？换句话说，在我看来，User 与 Address 之间存在一对多关系，您应该让数据访问层处理这些问题。
@Entity
@Table(name = "user")
public class User
{
@Id @Column(name="user_id")
public Long id;
@OneToMany
@JoinColumn(name = "user_id") // so the address table would have a user_id foreign key
public Address address;
}
关于java - Spring MVC 的问题。如何从两个或多个对象创建 View ？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/4986082/