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com.fasterxml.jackson.databind.ObjectMapper Example
How to use com.fasterxml.jackson.databind.ObjectMapper class?
✍: FYIcenter.com
com.fasterxml.jackson.databind.ObjectMapper class allows you to map a JSON message to a Java class object that matches the JSON property structure.
Here is an example Java program, ObjectMapperTest.java:
// ObjectMapperTest.java // Copyright (c) FYIcenter.com import com.fasterxml.jackson.databind.ObjectMapper; public class ObjectMapperTest { public static void main(String[] args) throws Exception { String json = "{ \"name\": \"John Smith\"," + " \"married\": false," + " \"age\": 25," + " \"phone\": null" + " }"; ObjectMapper mapper = new ObjectMapper(); Person person = mapper.readValue(json, Person.class); System.out.println(person); } public static class Person { private String name; private boolean married; private int age; private String phone; public void setName(String name) { this.name = name; } public void setMarried(boolean married) { this.married = married; } public void setAge(int age) { this.age = age; } public void setPhone(String phone) { this.phone = phone; } public String toString(){ return name+", "+age+", "+married+", "+phone; } } }
Run this Java program with 3 Jackson JAR files:
fyicenter$ java -cp jackson-core-2.14.0.jar: \ jackson-databind-2.14.0.jar: \ jackson-annotations-2.14.0.jar \ ObjectMapperTest.java John Smith, 25, false, null
The Java program mapped a JSON message to a Java class object correctly.
⇒ com.fasterxml.jackson.databind.ObjectWriter Example
⇐ Using Jackson Java JSON library
2021-08-11, 691🔥, 0💬
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