#php Xiaobian Yuzai's "Java JSON Processing Practical Guide: Data Manipulation Master Class" is a practical guide designed to help readers master the skills and techniques of processing JSON data in Java. method. Through this guide, readers will gain an in-depth understanding of JSON data structure, common operating techniques, and practical experience in solving practical problems, helping developers improve their data processing capabilities and achieve more efficient programming and data manipulation.
Introduction
jsON (javascript Object Notation) is a lightweight data exchange format widely used in WEB applications and api . Java provides a wealth of libraries for processing JSON data, the most popular of which are Jackson and Gson. This article will mainly introduce how to use these two libraries to read, write and modify JSON data.
Read JSON data
Jackson
ObjectMapper mapper = new ObjectMapper(); Jsonnode rootNode = mapper.readTree(jsonStr);
Gson
Gson gson = new Gson(); JsonObject jsonObject = gson.fromJson(jsonStr, JsonObject.class);
Parse JSON data
Jackson
JsonNode nameNode = rootNode.get("name"); if (nameNode.isValueNode()) { String name = nameNode.asText(); }
Gson
String name = jsonObject.get("name").getAsString();
Modify JSON data
Jackson
rootNode.replace("age", mapper.createNode().number(29));
Gson
jsonObject.remove("dept"); gson.fromJson("{"email": "example@test.com"}", JsonObject.class).entrySet().forEach(jsonObject::add);
Write JSON data
Jackson
String jsonStr = mapper.writeValueAsString(rootNode);
Gson
String jsonStr = gson.toJson(jsonObject);
Advanced Tips
Best Practices
in conclusion
Mastering Java JSON processing technology is essential for building modern web applications. With Jackson and Gson, you can easily read, parse, modify, and write JSON data, giving your applications the power to process data.
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