Android

@Expose 注解可以标明哪些字段进行序列化

例子

User 类

可以看见 name 属性 被 @Expose 修饰

class User {    @Expose    private String name;    private int 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;    }}

示例 1

创建普通的 Gson

        Gson gson1 = new GsonBuilder().create();        User user1 = new User();        user1.setName("yuan");        user1.setAge(15);        System.out.println("user1 = " + gson1.toJson(user1));

输出

user1 = {"name":"yuan","age":15}

示例2

创建 excludeFieldsWithoutExposeAnnotation Gson

 Gson gson2 = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();        User user2 = new User();        user2.setName("ming");        user2.setAge(18);        System.out.println("user2 = " + gson2.toJson(user2));

输出

user2 = {"name":"ming"}

结果

如果创建 excludeFieldsWithoutExposeAnnotation 的 Gson ，那么只解析 @Expose 注解标识的属性。