类 BufferedImageHttpMessageConverter

构造器详细资料

• BufferedImageHttpMessageConverter

  public BufferedImageHttpMessageConverter()

方法详细资料

• setDefaultContentType

  public void setDefaultContentType​(MediaType defaultContentType)

  Sets the default Content-Type to be used for writing.

  抛出:

  IllegalArgumentException - if the given content type is not supported by the Java Image I/O API

• getDefaultContentType

  public MediaType getDefaultContentType()

  Returns the default Content-Type to be used for writing. Called when write(java.awt.image.BufferedImage, org.springframework.http.MediaType, org.springframework.http.HttpOutputMessage) is invoked without a specified content type parameter.

• setCacheDir

  public void setCacheDir​(File cacheDir)

  Sets the cache directory. If this property is set to an existing directory, this converter will cache image data.

• canRead

  public boolean canRead​(Class<?> clazz,
                         MediaType mediaType)

  从接口复制的说明: HttpMessageConverter
  Indicates whether the given class can be read by this converter.

  指定者:

  canRead 在接口中 HttpMessageConverter<BufferedImage>

  参数:

  clazz - the class to test for readability

  mediaType - the media type to read (can be null if not specified); typically the value of a Content-Type header.

  返回:

  true if readable; false otherwise

• canWrite

  public boolean canWrite​(Class<?> clazz,
                          MediaType mediaType)

  从接口复制的说明: HttpMessageConverter
  Indicates whether the given class can be written by this converter.

  指定者:

  canWrite 在接口中 HttpMessageConverter<BufferedImage>

  参数:

  clazz - the class to test for writability

  mediaType - the media type to write (can be null if not specified); typically the value of an Accept header.

  返回:

  true if writable; false otherwise

• getSupportedMediaTypes

  public List<MediaType> getSupportedMediaTypes()

  从接口复制的说明: HttpMessageConverter
  Return the list of MediaType objects supported by this converter.

  指定者:

  getSupportedMediaTypes 在接口中 HttpMessageConverter<BufferedImage>

  返回:

  the list of supported media types, potentially an immutable copy

• read

  public BufferedImage read​(Class<? extends BufferedImage> clazz,
                            HttpInputMessage inputMessage)
                     throws IOException,
                            HttpMessageNotReadableException

  从接口复制的说明: HttpMessageConverter
  Read an object of the given type from the given input message, and returns it.

  指定者:

  read 在接口中 HttpMessageConverter<BufferedImage>

  参数:

  clazz - the type of object to return. This type must have previously been passed to the canRead method of this interface, which must have returned true.

  inputMessage - the HTTP input message to read from

  返回:

  the converted object

  抛出:

  IOException - in case of I/O errors

  HttpMessageNotReadableException - in case of conversion errors

• write

  public void write​(BufferedImage image,
                    MediaType contentType,
                    HttpOutputMessage outputMessage)
             throws IOException,
                    HttpMessageNotWritableException

  从接口复制的说明: HttpMessageConverter
  Write an given object to the given output message.

  指定者:

  write 在接口中 HttpMessageConverter<BufferedImage>

  参数:

  image - the object to write to the output message. The type of this object must have previously been passed to the canWrite method of this interface, which must have returned true.

  contentType - the content type to use when writing. May be null to indicate that the default content type of the converter must be used. If not null, this media type must have previously been passed to the canWrite method of this interface, which must have returned true.

  outputMessage - the message to write to

  抛出:

  IOException - in case of I/O errors

  HttpMessageNotWritableException - in case of conversion errors

• process

  protected void process​(ImageReadParam irp)

  Template method that allows for manipulating the ImageReadParam before it is used to read an image.

  The default implementation is empty.

• process

  protected void process​(ImageWriteParam iwp)

  Template method that allows for manipulating the ImageWriteParam before it is used to write an image.

  The default implementation is empty.