通信--后台篇

android

　　android客户端常使用json与后台进行数据交互，以下是如何将一个对象转换为json格式数据。

1 使对象转换成json

1.1 创建Result.class

/**
 * Created by Administrator on 2015/12/31 0031.
 * Result类
 * result用来判断数据书否存在
 */
public class Result {
    private int result;
    private List<Person> personData;
    public int getRuslut() {
        return result;
    }
    public void setRuslut(int ruslut) {
        this.result = ruslut;
    }
    public List<Person> getPersonData() {
        return personData;
    }
    public void setPersonData(List<Person> personData) {
        this.personData = personData;
    }
}

1.2 创建Person.class

/**
 * Created by Administrator on 2015/12/31 0031.
 * Person类
 */
public class Person {
    private String name;
    private String age;
    private String url;
    private List<SchoolInfo> schoolInfos;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public String getAge() {
        return age;
    }
    public void setAge(String age) {
        this.age = age;
    }
    public List<SchoolInfo> getSchoolInfos() {
        return schoolInfos;
    }
    public void setSchoolInfos(List<SchoolInfo> schoolInfos) {
        this.schoolInfos = schoolInfos;
    }
}

1.3 导入Gson.jar[1] ,将对象转换为json

/**
 * Created by Administrator on 2015/12/31 0031.
 * 将对象转换为json
 * gson.toJson(result)
 */
public class TestJson {
    public static void main(String args[]) {
        Result result = new Result();
        result.setRuslut(1);
        List<Person> list = new ArrayList<Person>();
        result.setPersonData(list);
        Person person1 = new Person();
        person1.setName("nate");
        person1.setAge("12");
        List<SchoolInfo> schoolInfos = new ArrayList<SchoolInfo>();
        SchoolInfo schoolInfo1 = new SchoolInfo();
        schoolInfo1.setSchool_name("清华");
        SchoolInfo schoolInfo2 = new SchoolInfo();
        schoolInfo2.setSchool_name("北大");
        schoolInfos.add(schoolInfo1);
        schoolInfos.add(schoolInfo2);
        person1.setSchoolInfos(schoolInfos);
        person1.setUrl("https://ss2.baidu.com/6ONYsjip0QIZ8tyhnq/it/u=2869132912,1117999248&fm=58&s=6156A472C13260331E7C166E02004076");
        list.add(person1);
        Person person2 = new Person();
        person2.setName("kimo");
        person2.setAge("23");
        List<SchoolInfo> schoolInfos1 = new ArrayList<SchoolInfo>();
        SchoolInfo schoolInfo3 = new SchoolInfo();
        schoolInfo3.setSchool_name("北京");
        SchoolInfo schoolInfo4 = new SchoolInfo();
        schoolInfo4.setSchool_name("上海");
        schoolInfos1.add(schoolInfo3);
        schoolInfos1.add(schoolInfo4);
        person2.setSchoolInfos(schoolInfos1);
        person2.setUrl("https://ss2.baidu.com/6ONYsjip0QIZ8tyhnq/it/u=2869132912," +
                "1117999248&fm=58&s=6156A472C13260331E7C166E02004076");
        list.add(person2);
        Gson gson = new Gson();
        System.out.println(gson.toJson(result));
    }
}

1.4 注意此句，此句非常关键gson.toJson(XXX);

gson.toJson(result)