如何从控制器传递多个模型对象以及如何将所有作为命令对象传递给spring mvc中的form：form？

Question

The scenario is like I want to pass more than one model objects from controller which I can achieve like,

 model .addAttribute(“person”, new Person());
 model.addAttribute(“address”, new Address());

But how to pass both of them or more in spring view

<form:form action=”registration” command=”person”>

As it only allows me to pass only one command . Then how to pass all the require command over their.

Answer 1

Just add both person and address into an enveloping object called personDetails and pass that to the form.

class PersonDetails {
    private Person person;
    private Address address;

    ...
}


PersonDetails personDetails = new PersonDetails();
personDetails.setPerson(new Person());
personDetails.setAddress(new Address());

model.addAttribute(“personDetails”, personDetails);


<form:form action=”registration” command=”personDetails”>

Once you do that, you'll have to modify the path s appropriately.

<form:input path="firstName" />

becomes

<form:input path="person.firstName" />

Other more elegant option is to enclose Address within the Person and just expose the Person as a command. Just as @Seabook mentioned in his answer below.