spring mvc 学习二

command:

public class RantsForVehicleController
    extends AbstractCommandController {
  public RantsForVehicleController() {
    setCommandClass(Vehicle.class);
    setCommandName("vehicle");
  }
  protected ModelAndView handle(HttpServletRequest request,
      HttpServletResponse response, Object command,
      BindException errors) throws Exception {
    Vehicle vehicle = (Vehicle) command;
    List vehicleRants =
        rantService.getRantsForVehicle(vehicle));
    Map model = errors.getModel();
    model.put("rants",4
        rantService.getRantsForVehicle(vehicle));
    model.put("vehicle", vehicle);
    return new ModelAndView("vehicleRants", model);
  }

public AddRantFormController() {
   setCommandClass(Rant.class);
   setCommandName("rant");
}
protected Object formBackingObject(HttpServletRequest request)
     throws Exception {
   Rant rantForm = (Rant) super.formBackingObject(request);
   rantForm.setVehicle(new Vehicle());
   return rantForm;
}
protected Map referenceData(HttpServletRequest request)
     throws Exception {
   Map referenceData = new HashMap();
   referenceData.put("states", ALL_STATES);
   return referenceData;
}
protected ModelAndView onSubmit(Object command,
     BindException bindException) throws Exception {
   Rant rant = (Rant) command;
   rantService.addRant(rant);
   return new ModelAndView(getSuccessView());
}

validator相关：

<bean id="addRantController"
    class="com.roadrantz.mvc.AddRantFormController">
  <property name="formView" value="addRant" />
  <property name="successView" value="rantAdded" />
  <property name="rantService" ref="rantService" />
  <property name="validator">
    <bean class="com.roadrantz.mvc.RantValidator" />
  </property>
</bean>

protected Object formBackingObject(HttpServletRequest request)
     throws Exception {
   Motorist formMotorist = new Motorist();
   List<Vehicle> vehicles = new ArrayList<Vehicle>();
   vehicles.add(new Vehicle());
   formMotorist.setVehicles(vehicles);
   return formMotorist;
}
protected Map referenceData(HttpServletRequest request,
     Object command, Errors errors, int page) throws Exception {
   Motorist motorist = (motorist) command;
   Map refData = new HashMap();
   if(page == 1 && request.getParameter("_target1") != null) {
       refData.put("nextVehicle",
           motorist.getVehicles().size() - 1);
   }
   return refData;
}
protected void postProcessPage(HttpServletRequest request,
     Object command, Errors errors, int page) throws Exception {
   Motorist motorist = (Motorist) command;

  if(page == 1 && request.getParameter("_target1") != null) {
    motorist.getVehicles().add(new Vehicle());
  }
}
protected ModelAndView processFinish(HttpServletRequest request,
    HttpServletResponse response, Object command,
    BindException errors)
    throws Exception {
  Motorist motorist = (motorist) command;
  // the last vehicle is always blank...remove it
  motorist.getVehicles().remove(
      motorist.getVehicles().size() - 1);
  rantService.addMotorist(motorist);
  return new ModelAndView(getSuccessView(),
      "motorist", motorist);
}
// injected
private RantService rantService;
public void setRantService(RantService rantService) {
  this.rantService = rantService;
}
// returns the last page as the success view
private String getSuccessView() {
  return getPages()[getPages().length-1];
}

==========================================================

To create Next
and Back buttons on the page, all you must do is create submit buttons that are
appropriately named with the _target prefix:
<form method="POST" action="feedback.htm">
…
  <input type="submit" value="Back" name="_target0">
  <input type="submit" value="Next" name="_target2">
</form>

==========================================================

ThrowawayController都是prototype的

==============================================

<bean id="exceptionResolver" class="org.springframework.web.
       ? servlet.handler.SimpleMappingExceptionResolver">
  <property name="exceptionMappings">
    <props>
      <prop key="java.lang.Exception">friendlyError</prop>
    </props>
  </property>
</bean>

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单词：

equanimity