com.fr.startup.web.annotation

类 MappingJackson2HttpMessageConverter

java.lang.Object

com.fr.third.springframework.http.converter.AbstractHttpMessageConverter<java.lang.Object>

com.fr.startup.web.annotation.MappingJackson2HttpMessageConverter

所有已实现的接口:

com.fr.third.springframework.http.converter.GenericHttpMessageConverter<java.lang.Object>, com.fr.third.springframework.http.converter.HttpMessageConverter<java.lang.Object>

public class MappingJackson2HttpMessageConverter
extends com.fr.third.springframework.http.converter.AbstractHttpMessageConverter<java.lang.Object>
implements com.fr.third.springframework.http.converter.GenericHttpMessageConverter<java.lang.Object>

对象转json返回给前端 主要是copy spring里面的MappingJackson2HttpMessageConverter 因为spring里面用的是jackson里面的我们这边需要用fr-jackson 没有特殊的必须的情况尽量不改spring内部的代码spring已经提供了足够的扩展点 来应付各种需求

字段概要

字段

限定符和类型	字段和说明
static java.nio.charset.Charset	DEFAULT_CHARSET

从类继承的字段 com.fr.third.springframework.http.converter.AbstractHttpMessageConverter

logger

构造器概要

构造器

构造器和说明
MappingJackson2HttpMessageConverter() Construct a new MappingJackson2HttpMessageConverter.

方法概要

方法

限定符和类型	方法和说明
boolean	canRead(java.lang.Class<?> clazz, com.fr.third.springframework.http.MediaType mediaType)
boolean	canRead(java.lang.reflect.Type type, java.lang.Class<?> contextClass, com.fr.third.springframework.http.MediaType mediaType)
boolean	canWrite(java.lang.Class<?> clazz, com.fr.third.springframework.http.MediaType mediaType)
protected com.fr.third.fasterxml.jackson.databind.JavaType	getJavaType(java.lang.reflect.Type type, java.lang.Class<?> contextClass) Return the Jackson JavaType for the specified type and context class.
protected com.fr.third.fasterxml.jackson.core.JsonEncoding	getJsonEncoding(com.fr.third.springframework.http.MediaType contentType) Determine the JSON encoding to use for the given content type.
com.fr.third.fasterxml.jackson.databind.ObjectMapper	getObjectMapper() Return the underlying ObjectMapper for this view.
java.lang.Object	read(java.lang.reflect.Type type, java.lang.Class<?> contextClass, com.fr.third.springframework.http.HttpInputMessage inputMessage)
protected java.lang.Object	readInternal(java.lang.Class<?> clazz, com.fr.third.springframework.http.HttpInputMessage inputMessage)
void	setJsonPrefix(java.lang.String jsonPrefix) Specify a custom prefix to use for this view's JSON output.
void	setObjectMapper(com.fr.third.fasterxml.jackson.databind.ObjectMapper objectMapper) Set the ObjectMapper for this view.
void	setPrefixJson(boolean prefixJson) Indicate whether the JSON output by this view should be prefixed with "{} &&".
void	setPrettyPrint(boolean prettyPrint) This is a shortcut for setting up an ObjectMapper as follows: ObjectMapper mapper = new ObjectMapper(); mapper.configure(SerializationFeature.INDENT_OUTPUT, true); converter.setObjectMapper(mapper);
protected boolean	supports(java.lang.Class<?> clazz)
protected void	writeInternal(java.lang.Object object, com.fr.third.springframework.http.HttpOutputMessage outputMessage)

从类继承的方法 com.fr.third.springframework.http.converter.AbstractHttpMessageConverter

canRead, canWrite, getContentLength, getDefaultContentType, getSupportedMediaTypes, read, setSupportedMediaTypes, write

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 com.fr.third.springframework.http.converter.HttpMessageConverter

getSupportedMediaTypes, read, write

字段详细资料

DEFAULT_CHARSET

public static final java.nio.charset.Charset DEFAULT_CHARSET

构造器详细资料

MappingJackson2HttpMessageConverter

public MappingJackson2HttpMessageConverter()

Construct a new MappingJackson2HttpMessageConverter.

方法详细资料

setObjectMapper

public void setObjectMapper(com.fr.third.fasterxml.jackson.databind.ObjectMapper objectMapper)

Set the ObjectMapper for this view. If not set, a default ObjectMapper is used.

Setting a custom-configured ObjectMapper is one way to take further control of the JSON serialization process. For example, an extended can be configured that provides custom serializers for specific types. The other option for refining the serialization process is to use Jackson's provided annotations on the types to be serialized, in which case a custom-configured ObjectMapper is unnecessary.

getObjectMapper

public com.fr.third.fasterxml.jackson.databind.ObjectMapper getObjectMapper()

Return the underlying ObjectMapper for this view.

setJsonPrefix

public void setJsonPrefix(java.lang.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)

Indicate 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 does not affect the evaluation of JSON, but if JSON validation is performed on the string, the prefix would need to be ignored.

另请参阅:

setJsonPrefix(java.lang.String)

setPrettyPrint

public void setPrettyPrint(boolean prettyPrint)

This is a shortcut for setting up an ObjectMapper as follows:

 ObjectMapper mapper = new ObjectMapper();
 mapper.configure(SerializationFeature.INDENT_OUTPUT, true);
 converter.setObjectMapper(mapper);
 

canRead

public boolean canRead(java.lang.Class<?> clazz,
              com.fr.third.springframework.http.MediaType mediaType)

指定者:

canRead 在接口中 com.fr.third.springframework.http.converter.HttpMessageConverter<java.lang.Object>

覆盖:

canRead 在类中 com.fr.third.springframework.http.converter.AbstractHttpMessageConverter<java.lang.Object>

canRead

public boolean canRead(java.lang.reflect.Type type,
              java.lang.Class<?> contextClass,
              com.fr.third.springframework.http.MediaType mediaType)

指定者:

canRead 在接口中 com.fr.third.springframework.http.converter.GenericHttpMessageConverter<java.lang.Object>

canWrite

public boolean canWrite(java.lang.Class<?> clazz,
               com.fr.third.springframework.http.MediaType mediaType)

指定者:

canWrite 在接口中 com.fr.third.springframework.http.converter.HttpMessageConverter<java.lang.Object>

覆盖:

canWrite 在类中 com.fr.third.springframework.http.converter.AbstractHttpMessageConverter<java.lang.Object>

supports

protected boolean supports(java.lang.Class<?> clazz)

指定者:

supports 在类中 com.fr.third.springframework.http.converter.AbstractHttpMessageConverter<java.lang.Object>

readInternal

protected java.lang.Object readInternal(java.lang.Class<?> clazz,
                            com.fr.third.springframework.http.HttpInputMessage inputMessage)
                                 throws java.io.IOException,
                                        com.fr.third.springframework.http.converter.HttpMessageNotReadableException

指定者:

readInternal 在类中 com.fr.third.springframework.http.converter.AbstractHttpMessageConverter<java.lang.Object>

抛出:

java.io.IOException

com.fr.third.springframework.http.converter.HttpMessageNotReadableException

read

public java.lang.Object read(java.lang.reflect.Type type,
                    java.lang.Class<?> contextClass,
                    com.fr.third.springframework.http.HttpInputMessage inputMessage)
                      throws java.io.IOException,
                             com.fr.third.springframework.http.converter.HttpMessageNotReadableException

指定者:

read 在接口中 com.fr.third.springframework.http.converter.GenericHttpMessageConverter<java.lang.Object>

抛出:

java.io.IOException

com.fr.third.springframework.http.converter.HttpMessageNotReadableException

writeInternal

protected void writeInternal(java.lang.Object object,
                 com.fr.third.springframework.http.HttpOutputMessage outputMessage)
                      throws java.io.IOException,
                             com.fr.third.springframework.http.converter.HttpMessageNotWritableException

指定者:

writeInternal 在类中 com.fr.third.springframework.http.converter.AbstractHttpMessageConverter<java.lang.Object>

抛出:

java.io.IOException

com.fr.third.springframework.http.converter.HttpMessageNotWritableException

getJavaType

protected com.fr.third.fasterxml.jackson.databind.JavaType getJavaType(java.lang.reflect.Type type,
                                                           java.lang.Class<?> contextClass)

Return the Jackson JavaType for the specified type and context class.

The default implementation returns typeFactory.constructType(type, contextClass), but this can be overridden in subclasses, to allow for custom generic collection handling. For instance:

 protected JavaType getJavaType(Type type) {
 if (type instanceof Class && List.class.isAssignableFrom((Class)type)) {
 return TypeFactory.collectionType(ArrayList.class, MyBean.class);
 } else {
 return super.getJavaType(type);
 }
 }
 

参数:

type - the type to return the java type for

contextClass - a context class for the target type, for example a class in which the target type appears in a method signature, can be null signature, can be null

返回:

the java type

getJsonEncoding

protected com.fr.third.fasterxml.jackson.core.JsonEncoding getJsonEncoding(com.fr.third.springframework.http.MediaType contentType)

Determine the JSON encoding to use for the given content type.

参数:

contentType - the media type as requested by the caller

返回:

the JSON encoding to use (never null)