Problem with Spring MVC. How can I create view from two or more object?
[spring 3.0.5] [jboss 5.1]
A have a two class
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
}
In Controller I have this code:
@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);
}
And now I want to create from with two input element in JSP
<%@taglib uri="http://www.springframework.org/tags" prefix="spring"%> <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html><head><body&g开发者_运维技巧t;
<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>
When I runing a got a exception like this one:
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 match the parameter type of the setter? org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:707) org.springframework.be
Can someone please explain to me why and how to improve the code?
Wrap your objects in a wrapper form class and pass it in the model.
public class MyForm
{
public user;
public address;
// getters, setters, etc.
}
Then
ModelAndView mav = new ModelAndView(); // ModelAndView
mav.addObject("myForm", new MyForm()); // e.g.
In your model, should address be attached to a user? In other words, it seems to me like a User has a one to many relationship to Address, and you should let your data access layer handle these concerns.
@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;
}
You could also do the following, which would prevent you from introducing a new class strictly for display purposes. Spring forms can handle nested properties.
User user = new User();
Address adr = new Address();
user.setAddress(adr);
mav.addObject("user", user);
In your .jsp you'd reach the address object this way:
<form:form method="POST" commandName="user">
<form:label path="name" />
<form:input path="name" />
<form:label path="address.street" />
<form:input path="address.street" />
</form:form>
The property of the object user is address (I suppose you have a getter called getAddress()), so in the form you have to use address instead of adr:
<form:label path="address.street" />
<form:input path="address.street" />
or create a getter called getAdr() (as you want)
加载中,请稍侯......
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