问题描述
将对象包装在包装器表单类中,然后将其传递给模型。
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,与User
有着一对多的关系Address
,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;
}
解决方法
[spring3.0.5] [jboss 5.1]
一个有两个班
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,我有以下代码:
@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来创建
<%@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>
当我运行一个类似这样的异常:
org.springframework.beans.NotReadablePropertyException:Bean类[form.User]的无效属性’adr’:Bean属性’adr’不可读或具有无效的getter方法:getter的返回类型是否与getter方法的参数类型匹配。二传手?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?