java.lang.Object
- org.springframework.web.portlet.ModelAndView

```
public class ModelAndView
extends Object
```
Holder for both Model and View in the web MVC framework. Note that these are entirely distinct. This class merely holds both to make it possible for a controller to return both model and view in a single return value.
Represents a model and view returned by a handler, to be resolved by a DispatcherPortlet. The view can take the form of a String view name which will need to be resolved by a ViewResolver object; alternatively a view object can be specified directly. The model is a Map, allowing the use of multiple objects keyed by name.
从以下版本开始:
2.0
作者:
Juergen Hoeller
另请参阅:
DispatcherPortlet, ViewResolver, HandlerAdapter, Controller

构造器概要

构造器
构造器	说明
`ModelAndView()`	Default constructor for bean-style usage: populating bean properties instead of passing in constructor arguments.
`ModelAndView(Object view)`	Convenient constructor when there is no model data to expose.
`ModelAndView(Object view, String modelName, Object modelObject)`	Convenient constructor to take a single model object.
`ModelAndView(Object view, Map<String,?> model)`	Create a new ModelAndView given a View object and a model.
`ModelAndView(String viewName)`	Convenient constructor when there is no model data to expose.
`ModelAndView(String viewName, String modelName, Object modelObject)`	Convenient constructor to take a single model object.
`ModelAndView(String viewName, Map<String,?> model)`	Create a new ModelAndView given a view name and a model.

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`ModelAndView`	`addAllObjects(Map<String,?> modelMap)`	Add all attributes contained in the provided Map to the model.
`ModelAndView`	`addObject(Object attributeValue)`	Add an attribute to the model using parameter name generation.
`ModelAndView`	`addObject(String attributeName, Object attributeValue)`	Add an attribute to the model.
`void`	`clear()`	Clear the state of this ModelAndView object.
`Map<String,Object>`	`getModel()`	Return the model map.
`protected Map<String,Object>`	`getModelInternal()`	Return the model map.
`ModelMap`	`getModelMap()`	Return the underlying `ModelMap` instance (never `null`).
`Object`	`getView()`	Return the View object, or `null` if we are using a view name to be resolved by the DispatcherPortlet via a ViewResolver.
`String`	`getViewName()`	Return the view name to be resolved by the DispatcherPortlet via a ViewResolver, or `null` if we are using a view object.
`boolean`	`hasView()`	Indicate whether or not this `ModelAndView` has a view, either as a view name or as a direct view instance.
`boolean`	`isEmpty()`	Return whether this ModelAndView object is empty, i.e. whether it does not hold any view and does not contain a model.
`boolean`	`isReference()`	Return whether we use a view reference, i.e.
`void`	`setView(Object view)`	Set a View object for this ModelAndView.
`void`	`setViewName(String viewName)`	Set a view name for this ModelAndView, to be resolved by the DispatcherPortlet via a ViewResolver.
`String`	`toString()`	Return diagnostic information about this model and view.
`boolean`	`wasCleared()`	Return whether this ModelAndView object is empty as a result of a call to `clear()` i.e. whether it does not hold any view and does not contain a model.

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

- 构造器详细资料
  - ModelAndView
```
public ModelAndView()
```
    Default constructor for bean-style usage: populating bean properties instead of passing in constructor arguments.
    另请参阅:
    setView(Object), setViewName(String)
  - ModelAndView
```
public ModelAndView(String viewName)
```
    Convenient constructor when there is no model data to expose. Can also be used in conjunction with addObject.
    参数:
    viewName - name of the View to render, to be resolved by the DispatcherPortlet's ViewResolver
    另请参阅:
    addObject(java.lang.String, java.lang.Object)
  - ModelAndView
```
public ModelAndView(Object view)
```
    Convenient constructor when there is no model data to expose. Can also be used in conjunction with addObject.
    参数:
    view - View object to render (usually a Servlet MVC View object)
    另请参阅:
    addObject(java.lang.String, java.lang.Object)
  - ModelAndView
```
public ModelAndView(String viewName,
                    Map<String,?> model)
```
    Create a new ModelAndView given a view name and a model.
    参数:
    viewName - name of the View to render, to be resolved by the DispatcherPortlet's ViewResolver
    model - Map of model names (Strings) to model objects (Objects). Model entries may not be null, but the model Map may be null if there is no model data.
  - ModelAndView
```
public ModelAndView(Object view,
                    Map<String,?> model)
```
    Create a new ModelAndView given a View object and a model.
    参数:
    view - View object to render (usually a Servlet MVC View object)
    model - Map of model names (Strings) to model objects (Objects). Model entries may not be null, but the model Map may be null if there is no model data.
  - ModelAndView
```
public ModelAndView(String viewName,
                    String modelName,
                    Object modelObject)
```
    Convenient constructor to take a single model object.
    参数:
    viewName - name of the View to render, to be resolved by the DispatcherPortlet's ViewResolver
    modelName - name of the single entry in the model
    modelObject - the single model object
  - ModelAndView
```
public ModelAndView(Object view,
                    String modelName,
                    Object modelObject)
```
    Convenient constructor to take a single model object.
    参数:
    view - View object to render (usually a Servlet MVC View object)
    modelName - name of the single entry in the model
    modelObject - the single model object
- 方法详细资料
  - setViewName
```
public void setViewName(String viewName)
```
    Set a view name for this ModelAndView, to be resolved by the DispatcherPortlet via a ViewResolver. Will override any pre-existing view name or View.
  - getViewName
```
public String getViewName()
```
    Return the view name to be resolved by the DispatcherPortlet via a ViewResolver, or null if we are using a view object.
  - setView
```
public void setView(Object view)
```
    Set a View object for this ModelAndView. Will override any pre-existing view name or View.
    The given View object will usually be a Servlet MVC View object. This is nevertheless typed as Object to avoid a Servlet API dependency in the Portlet ModelAndView class.
  - getView
```
public Object getView()
```
    Return the View object, or null if we are using a view name to be resolved by the DispatcherPortlet via a ViewResolver.
  - hasView
```
public boolean hasView()
```
    Indicate whether or not this ModelAndView has a view, either as a view name or as a direct view instance.
  - isReference
```
public boolean isReference()
```
    Return whether we use a view reference, i.e. true if the view has been specified via a name to be resolved by the DispatcherPortlet via a ViewResolver.
  - getModelInternal
```
protected Map<String,Object> getModelInternal()
```
    Return the model map. May return null. Called by DispatcherPortlet for evaluation of the model.
  - getModelMap
```
public ModelMap getModelMap()
```
    Return the underlying ModelMap instance (never null).
  - getModel
```
public Map<String,Object> getModel()
```
    Return the model map. Never returns null. To be called by application code for modifying the model.
  - addObject
```
public ModelAndView addObject(String attributeName,
                              Object attributeValue)
```
    Add an attribute to the model.
    参数:
    attributeName - name of the object to add to the model
    attributeValue - object to add to the model (never null)
    另请参阅:
    ModelMap.addAttribute(String, Object), getModelMap()
  - addObject
```
public ModelAndView addObject(Object attributeValue)
```
    Add an attribute to the model using parameter name generation.
    参数:
    attributeValue - the object to add to the model (never null)
    另请参阅:
    ModelMap.addAttribute(Object), getModelMap()
  - addAllObjects
```
public ModelAndView addAllObjects(Map<String,?> modelMap)
```
    Add all attributes contained in the provided Map to the model.
    参数:
    modelMap - a Map of attributeName -> attributeValue pairs
    另请参阅:
    ModelMap.addAllAttributes(Map), getModelMap()
  - clear
```
public void clear()
```
    Clear the state of this ModelAndView object. The object will be empty afterwards.
    Can be used to suppress rendering of a given ModelAndView object in the postHandleRender method of a HandlerInterceptor.
    另请参阅:
    isEmpty(), HandlerInterceptor.postHandleRender(javax.portlet.RenderRequest, javax.portlet.RenderResponse, java.lang.Object, org.springframework.web.portlet.ModelAndView)
  - isEmpty
```
public boolean isEmpty()
```
    Return whether this ModelAndView object is empty, i.e. whether it does not hold any view and does not contain a model.
  - wasCleared
```
public boolean wasCleared()
```
    Return whether this ModelAndView object is empty as a result of a call to clear() i.e. whether it does not hold any view and does not contain a model. Returns false if any additional state was added to the instance after the call to clear().
    另请参阅:
    clear()
  - toString
```
public String toString()
```
    Return diagnostic information about this model and view.
    覆盖:
    toString 在类中 Object

类 ModelAndView

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

ModelAndView

ModelAndView

ModelAndView

ModelAndView

ModelAndView

ModelAndView

ModelAndView

方法详细资料

setViewName

getViewName

setView

getView

hasView

isReference

getModelInternal

getModelMap

getModel

addObject

addObject

addAllObjects

clear

isEmpty

wasCleared

toString