java.lang.Object
- org.springframework.context.support.ApplicationObjectSupport
- - org.springframework.web.context.support.WebApplicationObjectSupport
  - - org.springframework.web.servlet.view.AbstractView
    - - org.springframework.web.servlet.view.json.AbstractJackson2View
      - org.springframework.web.servlet.view.json.MappingJackson2JsonView

所有已实现的接口:
Aware, BeanNameAware, ApplicationContextAware, ServletContextAware, View
```
public class MappingJackson2JsonView
extends AbstractJackson2View
```
Spring MVC View that renders JSON content by serializing the model for the current request using Jackson 2's ObjectMapper.
By default, the entire contents of the model map (with the exception of framework-specific classes) will be encoded as JSON. If the model contains only one key, you can have it extracted encoded as JSON alone via setExtractValueFromSingleKeyModel(boolean).
The default constructor uses the default configuration provided by Jackson2ObjectMapperBuilder.
Compatible with Jackson 2.6 and higher, as of Spring 4.3.
从以下版本开始:
3.1.2
作者:
Jeremy Grelle, Arjen Poutsma, Rossen Stoyanchev, Juergen Hoeller, Sebastien Deleuze

字段概要
字段
修饰符和类型字段说明
static String DEFAULT_CONTENT_TYPE
Default content type: "application/json".
- 从类继承的字段 org.springframework.web.servlet.view.json.AbstractJackson2View
  updateContentLength
- 从类继承的字段 org.springframework.context.support.ApplicationObjectSupport
  logger
- 从接口继承的字段 org.springframework.web.servlet.View
  PATH_VARIABLES, RESPONSE_STATUS_ATTRIBUTE, SELECTED_CONTENT_TYPE

构造器概要

构造器
构造器	说明
`MappingJackson2JsonView()`	Construct a new `MappingJackson2JsonView` using default configuration provided by `Jackson2ObjectMapperBuilder` and setting the content type to `application/json`.
`MappingJackson2JsonView(ObjectMapper objectMapper)`	Construct a new `MappingJackson2JsonView` using the provided `ObjectMapper` and setting the content type to `application/json`.

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
`protected Object`	`filterModel(Map<String,Object> model)`	Filter out undesired attributes from the given model.
`Set<String>`	`getModelKeys()`	Return the attributes in the model that should be rendered by this view.
`void`	`setExtractValueFromSingleKeyModel(boolean extractValueFromSingleKeyModel)`	Set whether to serialize models containing a single attribute as a map or whether to extract the single value from the model and serialize it directly.
`void`	`setJsonPrefix(String jsonPrefix)`	Specify a custom prefix to use for this view's JSON output.
`void`	`setModelKey(String modelKey)`	Set the attribute in the model that should be rendered by this view.
`void`	`setModelKeys(Set<String> modelKeys)`	Set the attributes in the model that should be rendered by this view.
`void`	`setPrefixJson(boolean prefixJson)`	Indicates whether the JSON output by this view should be prefixed with `")]}', "`.
`protected void`	`writePrefix(JsonGenerator generator, Object object)`	Write a prefix before the main content.

从类继承的方法 org.springframework.web.servlet.view.json.AbstractJackson2View
filterAndWrapModel, getEncoding, getObjectMapper, prepareResponse, renderMergedOutputModel, setDisableCaching, setEncoding, setObjectMapper, setPrettyPrint, setUpdateContentLength, writeContent, writeSuffix

从类继承的方法 org.springframework.web.context.support.WebApplicationObjectSupport
getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext

从类继承的方法 org.springframework.context.support.ApplicationObjectSupport
getApplicationContext, getMessageSourceAccessor, initApplicationContext, obtainApplicationContext, requiredContextClass, setApplicationContext

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

- 字段详细资料
  - DEFAULT_CONTENT_TYPE
```
public static final String DEFAULT_CONTENT_TYPE
```
    Default content type: "application/json". Overridable through AbstractView.setContentType(java.lang.String).
    另请参阅:
    常量字段值
- 构造器详细资料
  - MappingJackson2JsonView
```
public MappingJackson2JsonView()
```
    Construct a new MappingJackson2JsonView using default configuration provided by Jackson2ObjectMapperBuilder and setting the content type to application/json.
  - MappingJackson2JsonView
```
public MappingJackson2JsonView(ObjectMapper objectMapper)
```
    Construct a new MappingJackson2JsonView using the provided ObjectMapper and setting the content type to application/json.
    从以下版本开始:
    4.2.1
- 方法详细资料
  - setJsonPrefix
```
public void setJsonPrefix(String jsonPrefix)
```
    Specify a custom prefix to use for this view's JSON output. Default is none.
    另请参阅:
    setPrefixJson(boolean)
  - setPrefixJson
```
public void setPrefixJson(boolean prefixJson)
```
    Indicates whether the JSON output by this view should be prefixed with ")]}', ". Default is false.
    Prefixing the JSON string in this manner is used to help prevent JSON Hijacking. The prefix renders the string syntactically invalid as a script so that it cannot be hijacked. This prefix should be stripped before parsing the string as JSON.
    另请参阅:
    setJsonPrefix(java.lang.String)
  - setModelKey
```
public void setModelKey(String modelKey)
```
    Set the attribute in the model that should be rendered by this view. When set, all other model attributes will be ignored.
    指定者:
    setModelKey 在类中 AbstractJackson2View
  - setModelKeys
```
public void setModelKeys(@Nullable
                         Set<String> modelKeys)
```
    Set the attributes in the model that should be rendered by this view. When set, all other model attributes will be ignored.
  - getModelKeys
```
@Nullable
public final Set<String> getModelKeys()
```
    Return the attributes in the model that should be rendered by this view.
  - setExtractValueFromSingleKeyModel
```
public void setExtractValueFromSingleKeyModel(boolean extractValueFromSingleKeyModel)
```
    Set whether to serialize models containing a single attribute as a map or whether to extract the single value from the model and serialize it directly.
    The effect of setting this flag is similar to using MappingJackson2HttpMessageConverter with an @ResponseBody request-handling method.
    Default is false.
  - filterModel
```
protected Object filterModel(Map<String,Object> model)
```
    Filter out undesired attributes from the given model. The return value can be either another Map or a single value object.
    The default implementation removes BindingResult instances and entries not included in the modelKeys property.
    指定者:
    filterModel 在类中 AbstractJackson2View
    参数:
    model - the model, as passed on to AbstractJackson2View.renderMergedOutputModel(java.util.Map<java.lang.String, java.lang.Object>, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
    返回:
    the value to be rendered
  - writePrefix
```
protected void writePrefix(JsonGenerator generator,
                           Object object)
                    throws IOException
```
    从类复制的说明: AbstractJackson2View
    Write a prefix before the main content.
    覆盖:
    writePrefix 在类中 AbstractJackson2View
    参数:
    generator - the generator to use for writing content.
    object - the object to write to the output message.
    抛出:
    IOException

类 MappingJackson2JsonView

字段概要

从类继承的字段 org.springframework.web.servlet.view.json.AbstractJackson2View

从类继承的字段 org.springframework.context.support.ApplicationObjectSupport

从接口继承的字段 org.springframework.web.servlet.View

构造器概要

方法概要

从类继承的方法 org.springframework.web.servlet.view.json.AbstractJackson2View

从类继承的方法 org.springframework.web.servlet.view.AbstractView

从类继承的方法 org.springframework.web.context.support.WebApplicationObjectSupport

从类继承的方法 org.springframework.context.support.ApplicationObjectSupport

从类继承的方法 java.lang.Object

字段详细资料

DEFAULT_CONTENT_TYPE

构造器详细资料

MappingJackson2JsonView

MappingJackson2JsonView

方法详细资料

setJsonPrefix

setPrefixJson

setModelKey

setModelKeys

getModelKeys

setExtractValueFromSingleKeyModel

filterModel

writePrefix