gson工具类将Java类转换为json的使用

示例如何将一个 Student 对象转换成 json 串，实际操作中我们也可以将任意的 Java 类转换为 json 串，并且实施起来也非常简单，你仅仅需要创建一个 Gson 实例，然后传递将被转化为 json 串的对象，并调用该实例的 toJson 方法即可。import com.google.gson.Gson;

import java.util.Calendar;

public class StudentToJson {
public static void main(String[] args) {
Calendar dob = Calendar.getInstance();
dob.set(2000, 1, 1, 0, 0, 0);
Student student = new Student("Duke", "Menlo Park", dob.getTime());

Gson gson = new Gson();
String json = gson.toJson(student);
System.out.println("json = " + json);
}
}

import java.util.Date;

public class Student {
private String name;
private String address;
private Date dateOfBirth;

public Student() {
}

public Student(String name, String address, Date dateOfBirth) {
this.name = name;
this.address = address;
this.dateOfBirth = dateOfBirth;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}

public Date getDateOfBirth() {
return dateOfBirth;
}

public void setDateOfBirth(Date dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
}

以下是输出结果：

json = {"name":"Duke","address":"Menlo Park","dateOfBirth":"Feb 1, 2000 12:00:00 AM"}