Java often uses the JSON library to compare and select guide

JSON library ratio and selection guide in Java introduction: In Java development, processing JSON data is a very common task.JSON (JavaScript Object Notation) is a commonly used data exchange format that is easy to read and write, and it is also easy to be parsed and generated by machines.In Java, there are many different JSON libraries to choose from. In this article, some commonly used JSON libraries will be compared and selected. 1. Jackson Jackson is a very popular high -performance JSON library, which is widely used.It provides a set of powerful APIs that can easily convert Java objects and JSON data.Its speed and flexibility make it the first choice for many enterprises and open source projects. Example code: The following is an example of using Jackson to convert Java objects into json string: ObjectMapper objectMapper = new ObjectMapper(); String json = objectMapper.writeValueAsString(object); The following is an example of converting the JSON string to the Java object: ObjectMapper objectMapper = new ObjectMapper(); MyObject object = objectMapper.readValue(json, MyObject.class); 2. Gson GSON is another popular JSON library developed by Google.It provides a simple and intuitive API that allows you to easily sequence the Java object to JSON, and vice versa.GSON also has good performance and flexibility, suitable for most JSON processing scenarios. Example code: The following is an example of using GSON to convert Java objects to JSON string: Gson gson = new Gson(); String json = gson.toJson(object); The following is an example of converting the JSON string to the Java object: Gson gson = new Gson(); MyObject object = gson.fromJson(json, MyObject.class); 3. Fastjson Fastjson is another high -performance JSON library developed by Alibaba.It provides a set of functional APIs that support the conversion of Java objects and JSON data.Fastjson has very good performance when processing a large amount of data, so it is widely used in some sensitive scenes. Example code: The following is an example of converting Java objects with a Java object with Fastjson: String json = JSON.toJSONString(object); The following is an example of converting the JSON string to the Java object: MyObject object = JSON.parseObject(json, MyObject.class); 4. JSON-B JSON-B is a JSON library introduced in Java Ee 8, which provides a set of annotations and APIs to process conversion between JSON and Java objects.The goal of JSON-B is to simplify JSON operations and provide integration with the Java standard library. Example code: The following is an example of converting Java objects to JSON string with JSON-B: Jsonb jsonb = JsonbBuilder.create(); String json = jsonb.toJson(object); The following is an example of converting the JSON string to the Java object: Jsonb jsonb = JsonbBuilder.create(); MyObject object = jsonb.fromJson(json, MyObject.class); Choose Guide: When choosing a JSON library that suits you, consider the following factors: 1. Performance: Different JSON libraries may be different in terms of performance, selecting libraries with moderate performance according to your specific needs. 2. Function and flexibility: Different JSON libraries provide different functions and flexibility.Determine the required functions according to the needs of your project. 3. Community support: Choose a JSON library with popular and active community support, so as to obtain timely bug repair and new functions. 4. Convenience: Choose a convenient API and the JSON library of easy -to -read documents, which can improve development efficiency. 5. Compatibility: Consider the compatibility of the JSON library to other related technologies (such as persistent framework, web framework, etc.). in conclusion: This article introduces some commonly used Java JSON libraries, including Jackson, GSON, Fastjson, and JSON-B.These libraries have their own advantages and disadvantages and applicable scenarios.When selecting the JSON library, please consider the performance, function, community support, convenience and compatibility of compatibility according to project needs.Through reasonable selection and using the JSON library, you can easily process JSON data and improve development efficiency.