fastjson、gson、jackson序列化和反序列化所用json

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json：3个

需积分: 46 51 浏览量 2017-05-22 12:02:07 上传评论收藏 2MB RAR 举报

在IT行业中，JSON（JavaScript Object Notation）是一种广泛使用的轻量级数据交换格式，它易于人阅读和编写，同时也易于机器解析和生成。在Java世界里，为了方便地处理JSON数据，有三个主流的库被广泛应用，即Fastjson、Gson和Jackson。这些库提供了JSON的序列化和反序列化功能，将Java对象转换为JSON字符串，以及将JSON字符串转换回Java对象。 1. **Fastjson**：Fastjson是阿里巴巴开源的一个高性能的JSON库，它的设计目标是处理速度极快，API简洁易用。Fastjson提供了一种直接映射Java对象到JSON字符串的方法，反之亦然。例如，你可以通过`JSON.toJSONString(obj)`进行序列化，`JSON.parseObject(jsonStr, YourClass.class)`进行反序列化。Fastjson的性能在许多基准测试中表现出色，使其成为Java开发者的首选。 2. **Gson**：Google开发的Gson库则以灵活性著称，它可以处理复杂的Java类型，包括泛型、枚举、注解等。Gson的主要功能是通过`Gson.toJson()`方法实现对象到JSON的序列化，以及`Gson.fromJson()`方法实现JSON到对象的反序列化。Gson还支持自定义类型转换器，可以满足定制化的需求。 3. **Jackson**：Jackson是由FasterXML维护的一个强大的JSON库，它具有丰富的特性和高度的灵活性。Jackson的核心组件是 ObjectMapper，它负责在Java对象和JSON之间进行转换。序列化可以使用`objectMapper.writeValueAsString(obj)`，反序列化则是`objectMapper.readValue(jsonStr, YourClass.class)`。Jackson还支持注解驱动的映射，允许开发者通过注解来控制序列化和反序列化的具体行为。这三个库各有特点，Fastjson以其速度和简洁性脱颖而出，Gson则以其灵活性和对复杂类型的处理能力受到青睐，而Jackson则在功能全面和高度可配置性方面独具优势。在实际项目中，选择哪个库通常取决于项目需求、性能要求以及团队的熟悉程度。至于压缩包中的文件"json1.json"、"json2.json"和"json.json"，它们很可能是包含JSON数据的文本文件。这些文件可以被上述的Fastjson、Gson或Jackson库读取，然后转换为Java对象进行处理。例如，你可以使用这些库将JSON文件内容读入内存，进行解析，然后与Java对象交互，实现数据的处理和分析。在实际编程中，我们可能需要根据文件内容的具体结构来设计对应的Java类，以便正确地反序列化JSON数据。

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json1.rar （3个子文件）

json2.json 74.17MB

json.json 7KB

json1.json 720KB

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fastjson、gson、jackson序列化和反序列化所用 json

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