Learn the technical principles of Jackson DataFormats: Text framework in Java Library
Jackson DataFormats: Technical principles and examples of the Text framework
Introduction:
With the continuous development of big data and cloud computing, data processing has become more and more important.In the Java class library, Jackson DataFormats is a popular data parsing and conversion framework that can serialize and desertize the Java objects with various text formats.Among them, Jackson DataFormats: The Text framework is a sub -module of the Jackson library, which provides the function of processing text format.This article will introduce Jackson DataFormats: technical principles of the Text framework, and provide some Java code examples.
Technical principle:
Jackson DataFormats: The core principle of the Text framework is to realize the processing of text format data by defining a series of data formatters and analyzers (Parser).The text format can be JSON, YAML, XML, etc.In Jackson, each text format has corresponding modules, for example, the Jackson-Databind module is used to process JSON data, Jackson-DataFormat-Yaml module is used to process YAML data.
Jackson DataFormats: The Text framework uses a flexible object mapping mechanism to establish a mapping relationship between Java objects and text format data.This mapping relationship can be defined by annotations, or configuration can be configured by programming.During serialization, Jackson DataFormats: Text framework will convert the Java object to text format data based on the mapping relationship; when the deepericularization, it will convert it to the Java object according to the structure of the text format data.
Example:
Below is a code example using Jackson DataFormats: Text framework to process JSON format data example:
import com.fasterxml.jackson.databind.ObjectMapper;
public class JacksonJSONExample {
public static void main(String[] args) {
try {
// Create an ObjectMapper object
ObjectMapper objectMapper = new ObjectMapper();
// Convert java objects to json string
MyObject myObject = new MyObject("John", 25);
String json = objectMapper.writeValueAsString(myObject);
System.out.println(json);
// Convert json string to Java object
MyObject deserializedObject = objectMapper.readValue(json, MyObject.class);
System.out.println(deserializedObject.getName());
System.out.println(deserializedObject.getAge());
} catch (Exception e) {
e.printStackTrace();
}
}
}
class MyObject {
private String name;
private int age;
public MyObject(String name, int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
}
In the above example, we use the ObjectMapper object to convert the Java object MyObject into a JSON string and convert the JSON string back to the Java object.By using Jackson DataFormats: Text framework, we can easily conduct conversion between text format data and Java objects.
Summarize:
Jackson DataFormats: The Text framework is a sub -module of Jackson DataFormats for processing text format data.It defines the data formatter and parser to realize the conversion between text format data and Java objects.By mastering the technical principles of Jackson DataFormats: Text framework, and using the corresponding API, we can handle various text format data more efficiently.
