Gson是一个用于Java的库,可以用来生成JSON。我们可以使用Gson的fromJson()方法将JSON字符串解析为Java对象,并使用Gson的toJson()方法将Java对象转换为JSON字符串。fromJson()方法有两个参数,第一个参数是要解析的JSON字符串,第二个参数是要解析的Java类。我们可以将一个参数传递给toJson()方法,即我们要转换为JSON字符串的Java对象。
public <T> fromJson(java.lang.String json, java.lang.Class<T> classOfT) throws JsonSyntaxException
import com.google.gson.*; public class FromJsonMethodTest { public static void main(String[] args) { String jsonString = "{'id':101, 'firstName':'Jai','lastName':'Adithya'}"; <strong>Gson </strong>gson = new Gson(); Employee emp = gson.fromJson(jsonString, Employee.class); System.out.println(emp); } } // Employee class<strong> </strong>class Employee { private int id; private String firstName; private String lastName; public Employee() {} public int getId() { return id; } public void setId(int id) { this.id = id; } 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; } @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("Id : " + id); sb.append(", FirstName : " + firstName); sb.append(", Last Name : " + lastName); return sb.toString(); } }
Id : 101, FirstName : Jai, Last Name : Adithya<strong> </strong>
public java.lang.String toJson(java.lang.Object src)
import com.google.gson.*; public class ToJsonMethodTest { public static void main(String[] args) { Employee emp = new Employee(); emp.setId(110); emp.setFirstName("Raja"); emp.setLastName("Ramesh"); Gson gson = new Gson(); String jsonString = gson.toJson(emp); System.out.println(jsonString); } } // Employee class<strong> </strong>class Employee { private int id; private String firstName; private String lastName; public Employee() {} public int getId() { return id; } public void setId(int id) { this.id = id; } 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; } }
{"id":110,"firstName":"Raja","lastName":"Ramesh"}
以上是Gson在Java中的fromJson()和toJson()方法之间的区别是什么?的详细内容。更多信息请关注PHP中文网其他相关文章!