不就是個blog

在Wicket程式用Spring，要在web.xml加入設定：

<context -param>
  <param -name>contextConfigLocation</param>
  <param -value>/WEB-INF/spring*.xml</param>
</context>

<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

在WebApplication中要建立SpringComponentInjector：

public class BasicApplication extends WebApplication {
  @Override
  protected void init() {
    super.init();
    addComponentInstantiationListener(new SpringComponentInjector(this));
  }
}

如果還想把bean注入WebSession，要用InjectorHolder:

public class BasicSession extends WebSession {
  public BasicSession(Request request) {
    super(request);
    InjectorHolder.getInjector().inject(this);
  }
}

設定好之後，只要在需要注入bean的地方用@SpringBean即可，範例如下：

public class SignUpPage extends BasePage {
  @SpringBean
  private UserService userService;

  public SignUpPage() {
    add(new SignUpForm("signUpForm"));
  }

  class SignUpForm extends Form {
    private String name;

    private String email;

    private String password;

    @SuppressWarnings("unused")
    private String confirmPassword;

    public SignUpForm(String id) {
      super(id);
      PasswordTextField passwordField, confirmPasswordField;
      add(new TextField("name",  new PropertyModel(this, "name")).setRequired(true).add(new StringValidator.LengthBetweenValidator(2, 32)));
      add(new TextField("email", new PropertyModel(this, "email")).setRequired(true).add(EmailAddressValidator.getInstance()));
      add(passwordField        = new PasswordTextField("password",        new PropertyModel(this, "password")));
      add(confirmPasswordField = new PasswordTextField("confirmPassword", new PropertyModel(this, "confirmPassword")));
      add(new EqualPasswordInputValidator(passwordField, confirmPasswordField));
    }

    @Override
    protected void onSubmit() {
      User user = new User(name, email, password, User.ROLE_USER);
      try {
        userService.createUser(user);
        setResponsePage(HomePage.class);
      } catch (DuplicatedUserNameException e) {
        error(getLocalizer().getString(getId() + ".nameTaken", getWebPage(), "User's name is taken: " + name));
      } catch (DuplicatedUserEmailException e) {
        error(getLocalizer().getString(getId() + ".emailTaken", getWebPage(), "User's email is taken: " + email));
      }
    }
  }
}