用Gson实现json与对象、list集合之间的相互转化

/1.把json转化为一个类对象

 

String jsonData="{'userid':'1001','username':'张三','usersex':'男','banji':'计算机班','phone':'1008623232'}";
Gson gson=new Gson();
Person person=gson.fromJson(jsonData,Person.class);
System.out.println(person.toString());

 

 

   // 2.把jsonList转化为一个list对象

String jsonList="[{'userid':'1001','username':'张三','usersex':'男','banji':'计算机1班','phone':'1213123'},"
+ "{'userid':'1002','username':'李四','usersex':'男','banji':'计算机1班','phone':'232323'},"
+ "{'userid':'1003','username':'王五','usersex':'男','banji':'计算机1班','phone':'432423423'}]";
Gson gson1=new Gson();
List<Person> list= gson1.fromJson(jsonList, new TypeToken<List<Person>>() {}.getType());
for (Person person1 : list) {
System.out.println(person1.toString());
}

 

 //3.把list或对象转化为json

Gson gson2=new Gson();
String str=gson2.toJson(list);
System.out.println(str);