org.springframework.http.converter

Class StringHttpMessageConverter

java.lang.Object

org.springframework.http.converter.AbstractHttpMessageConverter<java.lang.String>

org.springframework.http.converter.StringHttpMessageConverter

All Implemented Interfaces:

HttpMessageConverter<java.lang.String>

public class StringHttpMessageConverter
extends AbstractHttpMessageConverter<java.lang.String>

Implementation of HttpMessageConverter that can read and write strings.

By default, this converter supports all media types (*/*), and writes with a Content-Type of text/plain. This can be overridden by setting the supportedMediaTypes property.

Since:

3.0

Author:

Arjen Poutsma, Juergen Hoeller

Field Summary

Fields

Modifier and Type	Field and Description
static java.nio.charset.Charset	DEFAULT_CHARSET The default charset used by the converter.

Fields inherited from class org.springframework.http.converter.AbstractHttpMessageConverter

logger

Constructor Summary

Constructors

Constructor and Description
StringHttpMessageConverter() A default constructor that uses "ISO-8859-1" as the default charset.
StringHttpMessageConverter(java.nio.charset.Charset defaultCharset) A constructor accepting a default charset to use if the requested content type does not specify one.

Method Summary

Modifier and Type	Method and Description
protected java.util.List<java.nio.charset.Charset>	getAcceptedCharsets() Return the list of supported Charsets.
protected java.lang.Long	getContentLength(java.lang.String str, MediaType contentType) Returns the content length for the given type.
protected java.lang.String	readInternal(java.lang.Class<? extends java.lang.String> clazz, HttpInputMessage inputMessage) Abstract template method that reads the actual object.
void	setWriteAcceptCharset(boolean writeAcceptCharset) Indicates whether the Accept-Charset should be written to any outgoing request.
boolean	supports(java.lang.Class<?> clazz) Indicates whether the given class is supported by this converter.
protected void	writeInternal(java.lang.String str, HttpOutputMessage outputMessage) Abstract template method that writes the actual body.

Methods inherited from class org.springframework.http.converter.AbstractHttpMessageConverter

addDefaultHeaders, canRead, canRead, canWrite, canWrite, getDefaultCharset, getDefaultContentType, getSupportedMediaTypes, read, setDefaultCharset, setSupportedMediaTypes, write

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CHARSET

public static final java.nio.charset.Charset DEFAULT_CHARSET

The default charset used by the converter.

Constructor Detail

StringHttpMessageConverter

public StringHttpMessageConverter()

A default constructor that uses "ISO-8859-1" as the default charset.

See Also:

StringHttpMessageConverter(Charset)

StringHttpMessageConverter

public StringHttpMessageConverter(java.nio.charset.Charset defaultCharset)

A constructor accepting a default charset to use if the requested content type does not specify one.

Method Detail

setWriteAcceptCharset

public void setWriteAcceptCharset(boolean writeAcceptCharset)

Indicates whether the Accept-Charset should be written to any outgoing request.

Default is true.

supports

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

Description copied from class: AbstractHttpMessageConverter

Indicates whether the given class is supported by this converter.

Specified by:

supports in class AbstractHttpMessageConverter<java.lang.String>

Parameters:

clazz - the class to test for support

Returns:

true if supported; false otherwise

readInternal

protected java.lang.String readInternal(java.lang.Class<? extends java.lang.String> clazz,
                                        HttpInputMessage inputMessage)
                                 throws java.io.IOException

Description copied from class: AbstractHttpMessageConverter

Abstract template method that reads the actual object. Invoked from AbstractHttpMessageConverter.read(java.lang.Class<? extends T>, org.springframework.http.HttpInputMessage).

Specified by:

readInternal in class AbstractHttpMessageConverter<java.lang.String>

Parameters:

clazz - the type of object to return

inputMessage - the HTTP input message to read from

Returns:

the converted object

Throws:

java.io.IOException - in case of I/O errors

getContentLength

protected java.lang.Long getContentLength(java.lang.String str,
                                          @Nullable
                                          MediaType contentType)

Description copied from class: AbstractHttpMessageConverter

Returns the content length for the given type.

By default, this returns null, meaning that the content length is unknown. Can be overridden in subclasses.

Overrides:

getContentLength in class AbstractHttpMessageConverter<java.lang.String>

Parameters:

str - the type to return the content length for

Returns:

the content length, or null if not known

writeInternal

protected void writeInternal(java.lang.String str,
                             HttpOutputMessage outputMessage)
                      throws java.io.IOException

Description copied from class: AbstractHttpMessageConverter

Abstract template method that writes the actual body. Invoked from AbstractHttpMessageConverter.write(T, org.springframework.http.MediaType, org.springframework.http.HttpOutputMessage).

Specified by:

writeInternal in class AbstractHttpMessageConverter<java.lang.String>

Parameters:

str - the object to write to the output message

outputMessage - the HTTP output message to write to

Throws:

java.io.IOException - in case of I/O errors

getAcceptedCharsets

protected java.util.List<java.nio.charset.Charset> getAcceptedCharsets()

Return the list of supported Charsets.

By default, returns Charset.availableCharsets(). Can be overridden in subclasses.

Returns:

the list of accepted charsets