如何使用 Java 中的 JSON-lib API 将 JSON 对象转换为 bean?
javajsonobject oriented programmingprogramming更新于 2025/7/24 22:04:17
JSONObject 类是 名称/值 对的集合(无序)，其中 bean 是一个类，其成员字段具有 setter 和 getter 方法。我们可以使用 JSONObject 类的 toBean() 方法将 JSON 对象转换为 bean。
语法
public static Object toBean(JSONObject jsonObject, Class beanClass)
示例
import net.sf.json.JSONObject;
public class ConvertJSONObjToBeanTest {
public static void main(String[] args) {
mployee emp = new Employee("Sai", "Ram", 30, "Bangalore");
JSONObject jsonObj = JSONObject.fromObject(emp);
System.out.println(jsonObj.toString(3)); // pretty print JSON
emp = (Employee)JSONObject.toBean(jsonObj, Employee.class);
System.out.println(emp.toString());
}
// Employee class
public static class Employee {
private String firstName, lastName, address;
private int age;
public Employee() {
}
public Employee(String firstName, String lastName, int age, String address) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
this.address = address;
}
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 String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String toString() {
return "Employee[ " +
"firstName = " + firstName +
", lastName = " + lastName +
", age = " + age +
", address = " + address +
" ]";
}
}
}
输出
{
"firstName": "Sai",
"lastName": "Ram",
"address": "Bangalore",
"age": 30
}
Employee[ firstName = Sai, lastName = Ram, age = 30, address = Bangalore ]
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