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".
`static String`	`DEFAULT_JSONP_CONTENT_TYPE`	已过时。 Will be removed as of Spring Framework 5.1, use CORS instead.

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已过时的方法
修饰符和类型	方法	说明
`protected Object`	`filterAndWrapModel(Map<String,Object> model, HttpServletRequest request)`	Filter and optionally wrap the model in `MappingJacksonValue` container.
`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.
`protected boolean`	`isValidJsonpQueryParam(String value)`	已过时。 Will be removed as of Spring Framework 5.1, use CORS instead.
`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`	`setJsonpParameterNames(Set<String> jsonpParameterNames)`	已过时。 Will be removed as of Spring Framework 5.1, use CORS instead.
`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`	`setResponseContentType(HttpServletRequest request, HttpServletResponse response)`	Set the content type of the response to the configured `content type` unless the `View.SELECTED_CONTENT_TYPE` request attribute is present and set to a concrete media type.
`protected void`	`writePrefix(JsonGenerator generator, Object object)`	Write a prefix before the main content.
`protected void`	`writeSuffix(JsonGenerator generator, Object object)`	Write a suffix after the main content.

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

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, 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
  - DEFAULT_JSONP_CONTENT_TYPE
```
@Deprecated
public static final String DEFAULT_JSONP_CONTENT_TYPE
```
    已过时。
    Will be removed as of Spring Framework 5.1, use CORS instead.
    Default content type for JSONP: "application/javascript".
    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(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
```
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.
  - setJsonpParameterNames
```
@Deprecated
public void setJsonpParameterNames(Set<String> jsonpParameterNames)
```
    已过时。
    Will be removed as of Spring Framework 5.1, use CORS instead.
    Set JSONP request parameter names. Each time a request has one of those parameters, the resulting JSON will be wrapped into a function named as specified by the JSONP request parameter value.
    The parameter names configured by default are "jsonp" and "callback".
    从以下版本开始:
    4.1
    另请参阅:
    JSONP Wikipedia article
  - isValidJsonpQueryParam
```
@Deprecated
protected boolean isValidJsonpQueryParam(String value)
```
    已过时。
    Will be removed as of Spring Framework 5.1, use CORS instead.
    Validate the jsonp query parameter value. The default implementation returns true if it consists of digits, letters, or "_" and ".". Invalid parameter values are ignored.
    参数:
    value - the query param value, never null
    从以下版本开始:
    4.1.8
  - 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
  - filterAndWrapModel
```
protected Object filterAndWrapModel(Map<String,Object> model,
                                    HttpServletRequest request)
```
    从类复制的说明: AbstractJackson2View
    Filter and optionally wrap the model in MappingJacksonValue container.
    覆盖:
    filterAndWrapModel 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)
    request - current HTTP request
    返回:
    the wrapped or unwrapped 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
  - writeSuffix
```
protected void writeSuffix(JsonGenerator generator,
                           Object object)
                    throws IOException
```
    从类复制的说明: AbstractJackson2View
    Write a suffix after the main content.
    覆盖:
    writeSuffix 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
  - setResponseContentType
```
protected void setResponseContentType(HttpServletRequest request,
                                      HttpServletResponse response)
```
    从类复制的说明: AbstractView
    Set the content type of the response to the configured content type unless the View.SELECTED_CONTENT_TYPE request attribute is present and set to a concrete media type.
    覆盖:
    setResponseContentType 在类中 AbstractView

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

DEFAULT_JSONP_CONTENT_TYPE

构造器详细资料

MappingJackson2JsonView

MappingJackson2JsonView

方法详细资料

setJsonPrefix

setPrefixJson

setModelKey

setModelKeys

getModelKeys

setExtractValueFromSingleKeyModel

setJsonpParameterNames

isValidJsonpQueryParam

filterModel

filterAndWrapModel

writePrefix

writeSuffix

setResponseContentType