Spring MVC - form handling with object request params

Question

Assume I have the following entities in my application:

public class Payment {
    private Long id;
    private Service service;
    private User user;
    private BigDecimal amount;
}

public cass Service {
    private Long id;
    private String name;
    private BigDecimal minAmount;
    private BigDecimal maxAmount;
}

public class User {
    private Long id;
    private String login;
    private String password;
    private BigDecimal balance;
}

I need to create html form that will allow users to process payments (instances of Payment class). So I need to create Payment instance in my controller method. I know that I can add to controller method, for example, Service service argument, and it will be filled by values from form with the same names. But how can I get the filled Payment object? With filled Service and User objects? I need to somehow save the whole Service object in my server page? How? I use Thymeleaf, if it matters.

Can you state your question in a more clear way?

mtyurt
– mtyurt

2015-05-20 13:45:11 +00:00
Commented May 20, 2015 at 13:45 — mtyurt
– mtyurt, Commented May 20, 2015 at 13:45

tommylii · Accepted Answer · 2015-05-20 15:26:12Z

2

On they thymeleaf file, as long as you respect the field structure of your class, Spring should be smart enough to fill the different fields.

<form th:object="${payment}" th:action="@{/sendPayment}" method="post">
      <input type="text" th:field="*{id}"/>
      <input type="text" th:field="*{service.name}"/>
      <input type="text" th:field="*{user.id}"/>
      <button type="submit">Submit</button>
</form>

Then on your Controller you just pass the Payment object:

@RequestMapping(value = "/sendPayment", method = RequestMethod.POST)
public String processPayment(final Payment payment){
    doSomethingWithPayment(payment);
}

edited May 20, 2015 at 15:26

answered May 20, 2015 at 15:17

tommylii

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