如何使用 Java 中的 flexjson 将 JSON 反序列化为 Java 对象?
javajsonobject oriented programmingprogramming
Flexjson 是一个 轻量级 库，用于将 Java 对象序列化 和 反序列化 为 JSON 格式，允许对象的深层和浅层复制。为了使用 flexjon 运行 Java 程序，我们需要导入 flexjson 包。我们可以使用 JSONDeserializer 类的 deserialize() 方法将 JSON 反序列化为 Java 对象，它以 json 字符串作为输入，并从该 json 表示生成静态类型对象图。默认情况下，它使用 json 数据中的 class 属性将无类型的通用 json 数据映射到特定的 Java 类型。
语法
public T deserialize(String input)
在下面的程序中，将 JSON 反序列化为 Java 对象
示例
import flexjson.*;
public class DeserializeJSONTest {
public static void main(String[] args) {
JSONDeserializer<Student> deserializer = new JSONDeserializer<Student>();
String jsonStr =
"{" +
"\"firstName\": \"Ravi\"," +
"\"lastName\": \"Chandra\"," +
"\"age\": 35," +
"\"class\": \"Student\"," + "\"salary\": 50000.00," +
"}";
Student student = deserializer.deserialize(jsonStr);
System.out.println(student);
}
}
// Student classclass Student {
private String firstName;
private String lastName;
private int age;
private double salary;
public Student() {}
public Student(String firstName, String lastName, int age, double salary) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
this.salary = salary;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
public String toString() {
return "Student[ " +
"firstName = " + firstName +
", lastName = " + lastName +
", age = " + age +
", salary = " + salary +
" ]";
}
}
输出
Student[ firstName = Ravi, lastName = Chandra, age = 35, salary = 50000.0 ]
