50 lines
2.8 KiB
Markdown
50 lines
2.8 KiB
Markdown
# google-gson
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[](https://travis-ci.org/google/gson)
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Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object.
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Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of.
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There are a few open-source projects that can convert Java objects to JSON. However, most of them require that you place Java annotations in your classes; something that you can not do if you do not have access to the source-code. Most also do not fully support the use of Java Generics. Gson considers both of these as very important design goals.
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*Gson Goals*
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* Provide simple `toJson()` and `fromJson()` methods to convert Java objects to JSON and vice-versa
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* Allow pre-existing unmodifiable objects to be converted to and from JSON
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* Extensive support of Java Generics
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* Allow custom representations for objects
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* Support arbitrarily complex objects (with deep inheritance hierarchies and extensive use of generic types)
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*Gson Downloads*
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* [Gson 2.6.1 Download](http://search.maven.org/#artifactdetails%7Ccom.google.code.gson%7Cgson%7C2.6.1%7Cjar) downloads at Maven Central
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*Gson Documentation*
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* Gson [API](http://google.github.io/gson/apidocs/): Javadocs for the current Gson release
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* Gson [user guide](https://github.com/google/gson/blob/master/UserGuide.md): This guide contains examples on how to use Gson in your code.
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* Gson [Roadmap](https://github.com/google/gson/blob/master/CHANGELOG.md): Details of changes in the recent versions
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* Gson [design document](https://github.com/google/gson/blob/master/GsonDesignDocument.md): This document discusses issues we faced while designing Gson. It also include a comparison of Gson with other Java libraries that can be used for Json conversion
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Please use the [google-gson Google group](http://groups.google.com/group/google-gson) to discuss Gson, or to post questions.
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*Gson-related Content Created by Third Parties*
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* [Gson Tutorial](http://www.studytrails.com/java/json/java-google-json-introduction.jsp) by `StudyTrails`
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*License*
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Gson is released under the [Apache 2.0 license](LICENSE).
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```
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Copyright 2008 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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```
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