FastJson入门学习

初学者入门学习，多多指正

构建People实体类

public class People {

private String name;
private int age;

public People() {
}

public People(String name, int age) {
this.name = name;
this.age = age;
}

public String getName() {
return name;
}

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

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

@Override
public String toString() {
return "User{" +
"name='" + name + '\'' +
", age=" + age +
'}';
}
}

构建GroupPeople实体类

public class PeopleGroup {

private String name;
private List<People> users = new ArrayList<>();

public PeopleGroup() {
}

public PeopleGroup(String name, List<People> users) {
this.name = name;
this.users = users;
}

public String getName() {
return name;
}

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

public List<People> getUsers() {
return users;
}

public void setUsers(List<People> users) {
this.users = users;
}

@Override
public String toString() {
return "UserGroup{" +
"name='" + name + '\'' +
", users=" + users +
'}';
}
}

测试

public class FastJsonTest {

public static void main(String[] args) {
//构建用户user1
People peo1 = new People();
peo1.setName("zhangsan");
peo1.setAge(12);

//构建用户user2
People peo2 = new People();
peo2.setName("root");
peo2.setAge(13);

//构建用户组对象
PeopleGroup group = new PeopleGroup();
group.setName("userGroup");
group.getUsers().add(peo1);
group.getUsers().add(peo2);

//用户组对象转json串
String s = JSON.toJSONString(group);
System.out.println("jsonString:"+s);

//json串转用户组对象
PeopleGroup group1 = JSON.parseObject(s, PeopleGroup.class);
System.out.println("gourpJavaBean:"+group1);

//构建用户对象数组
People[] people = new People[2];
people[0] = peo1;
people[1] = peo2;

//用户对象数组转json
String s1 = JSON.toJSONString(people);
System.out.println("objcArray-jsonString:"+s1);

//JSON串转用户对象列表
List<People> users1 = JSON.parseArray(s1, People.class);
System.out.println("jsonStr-UserObject:"+users1);

}
}

结果展示

D:\JDK_IDEA\jdk\bin\java.exe ...
jsonString:{"name":"userGroup","users":[{"age":12,"name":"zhangsan"},{"age":13,"name":"root"}]}
gourpJavaBean:UserGroup{name='userGroup', users=[User{name='zhangsan', age=12}, User{name='root', age=13}]}
objcArray-jsonString:[{"age":12,"name":"zhangsan"},{"age":13,"name":"root"}]
jsonStr-UserObject:[User{name='zhangsan', age=12}, User{name='root', age=13}]