dart:convert

JsonEncoder class

This class converts JSON objects to strings.

Example:

const JsonEncoder encoder = JsonEncoder();
const data = {'text': 'foo', 'value': '2'};

final String jsonString = encoder.convert(data);
print(jsonString); // {"text":"foo","value":"2"}

Example of pretty-printed output:

const JsonEncoder encoder = JsonEncoder.withIndent('  ');

const data = {'text': 'foo', 'value': '2'};
final String jsonString = encoder.convert(data);
print(jsonString);
// {
//   "text": "foo",
//   "value": "2"
// }

Inheritance

• Object
• StreamTransformerBase<Object?, String>
• Converter<Object?, String>
• JsonEncoder

Constructors

JsonEncoder([Object? toEncodable(dynamic object)?])

const

Creates a JSON encoder.

JsonEncoder.withIndent(String? indent, [Object? toEncodable(dynamic object)?])

const

Creates a JSON encoder that creates multi-line JSON.

Properties

hashCode → int

read-only, inherited

The hash code for this object.

indent → String?

final

The string used for indention.

runtimeType → Type

read-only, inherited

A representation of the runtime type of the object.

Methods

bind(Stream<Object?> stream) → Stream<String>

override

Transforms the provided stream.

cast<RS, RT>() → Converter<RS, RT>

inherited

Provides a Converter<RS, RT> view of this stream transformer.

convert(Object? object) → String

override

Converts object to a JSON String.

fuse<T>(Converter<String, T> other) → Converter<Object?, T>

override

Fuses this with other.

noSuchMethod(Invocation invocation) → dynamic

inherited

Invoked when a non-existent method or property is accessed.

startChunkedConversion(Sink<String> sink) → ChunkedConversionSink<Object?>

override

Starts a chunked conversion.

toString() → String

inherited

A string representation of this object.

Operators

operator ==(Object other) → bool

inherited

The equality operator.