使用Java中的Gson库将Java对象转换为JSON？
一个GSON 是一个Java的JSON库，它是由谷歌创建，它可以被用来生成一个JSON。通过使用Gson，我们可以生成JSON并将bean/java对象转换为JSON对象。我们可以调用Gson 类的 toJson()方法将Java对象转换为JSON对象。
语法
public java.lang.String toJson(java.lang.Object src)
示例
import com.google.gson.Gson;
public class ConvertJavaObjectToJSONTest {
public static void main(String[] args) {
Gson gson = new Gson();
Student student = new Student("Raja", "Ramesh", 30, "Hyderabad");
System.out.println(gson.toJson(student)); // converts java object to json object.
}
}
// student class
class Student {
private String firstName;
private String lastName;
private int age;
private String address;
public Student(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 "Student[ " +
" firstName = " + firstName +
", lastName = " + lastName +
", age = " + age +
", address = " + address +
" ]";
}
}输出结果
{"firstName":"Raja","lastName":"Ramesh","age":30,"address":"Hyderabad"}