java.lang.Object
- org.springframework.web.method.annotation.ModelFactory

```
public final class ModelFactory
extends Object
```
Assist with initialization of the Model before controller method invocation and with updates to it after the invocation.
On initialization the model is populated with attributes temporarily stored in the session and through the invocation of @ModelAttribute methods.
On update model attributes are synchronized with the session and also BindingResult attributes are added if missing.
从以下版本开始:
3.1
作者:
Rossen Stoyanchev

构造器概要

构造器
构造器	说明
`ModelFactory(List<InvocableHandlerMethod> handlerMethods, WebDataBinderFactory binderFactory, SessionAttributesHandler attributeHandler)`	Create a new instance with the given `@ModelAttribute` methods.

方法概要

所有方法静态方法实例方法具体方法
修饰符和类型	方法	说明
`static String`	`getNameForParameter(MethodParameter parameter)`	Derive the model attribute name for the given method parameter based on a `@ModelAttribute` parameter annotation (if present) or falling back on parameter type based conventions.
`static String`	`getNameForReturnValue(Object returnValue, MethodParameter returnType)`	Derive the model attribute name for the given return value based on: the method `ModelAttribute` annotation value the declared return type if it is more specific than `Object` the actual return value type
`void`	`initModel(NativeWebRequest request, ModelAndViewContainer container, HandlerMethod handlerMethod)`	Populate the model in the following order: Retrieve "known" session attributes listed as `@SessionAttributes`.
`void`	`updateModel(NativeWebRequest request, ModelAndViewContainer container)`	Promote model attributes listed as `@SessionAttributes` to the session.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - ModelFactory
```
public ModelFactory(List<InvocableHandlerMethod> handlerMethods,
                    WebDataBinderFactory binderFactory,
                    SessionAttributesHandler attributeHandler)
```
    Create a new instance with the given @ModelAttribute methods.
    参数:
    handlerMethods - the @ModelAttribute methods to invoke
    binderFactory - for preparation of BindingResult attributes
    attributeHandler - for access to session attributes
- 方法详细资料
  - initModel
```
public void initModel(NativeWebRequest request,
                      ModelAndViewContainer container,
                      HandlerMethod handlerMethod)
               throws Exception
```
    Populate the model in the following order:
    Retrieve "known" session attributes listed as @SessionAttributes.
    Invoke @ModelAttribute methods
    Find @ModelAttribute method arguments also listed as @SessionAttributes and ensure they're present in the model raising an exception if necessary.
    参数:
    request - the current request
    container - a container with the model to be initialized
    handlerMethod - the method for which the model is initialized
    抛出:
    Exception - may arise from @ModelAttribute methods
  - updateModel
```
public void updateModel(NativeWebRequest request,
                        ModelAndViewContainer container)
                 throws Exception
```
    Promote model attributes listed as @SessionAttributes to the session. Add BindingResult attributes where necessary.
    参数:
    request - the current request
    container - contains the model to update
    抛出:
    Exception - if creating BindingResult attributes fails
  - getNameForParameter
```
public static String getNameForParameter(MethodParameter parameter)
```
    Derive the model attribute name for the given method parameter based on a @ModelAttribute parameter annotation (if present) or falling back on parameter type based conventions.
    参数:
    parameter - a descriptor for the method parameter
    返回:
    the derived name
    另请参阅:
    Conventions.getVariableNameForParameter(MethodParameter)
  - getNameForReturnValue
```
public static String getNameForReturnValue(Object returnValue,
                                           MethodParameter returnType)
```
    Derive the model attribute name for the given return value based on:
    the method ModelAttribute annotation value
    the declared return type if it is more specific than Object
    the actual return value type
    参数:
    returnValue - the value returned from a method invocation
    returnType - a descriptor for the return type of the method
    返回:
    the derived name (never null or empty String)

类 ModelFactory

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

ModelFactory

方法详细资料

initModel

updateModel

getNameForParameter

getNameForReturnValue