Google的JSon——GSON生成JSon数据

来源：互联网发布：2015年轴承行业数据编辑：程序博客网时间：2024/05/21 21:41

对于JSon数据的解析，android内部有提供相应的方法，但是Google提供的JSon解析包GSon使用起来也比较简便，下面介绍一下这个包的解析方法：

1.首先我们来看一下JSon的数据封装：

{"result":1,"personData":[{"name":"nate","age":12,"url":"http://www.baidu.com","schoolInfo":[{"school_name":"清华"},{"school_name":"北大"}]},{"name":"jack","age":12,"url":"http://www.sina.com","schoolInfo":[{"school_name":"aaa"},{"school_name":"bbb"}]}]}

2.需要生成这个JSon文件也很简单，首先用类来封装这些数据，提供get和set方法即可，如果是数据集合，那么久用List来封装，还要注意的是变量名是和JSon数据的键值对应的：

import java.util.List;public class Person {private String name;private int age;private String url;private List<SchoolInfo> schoolInfo;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;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public List<SchoolInfo> getSchoolInfo() {return schoolInfo;}public void setSchoolInfo(List<SchoolInfo> schoolInfo) {this.schoolInfo = schoolInfo;}}

public class SchoolInfo {private String school_name;public String getSchool_name() {return school_name;}public void setSchool_name(String school_name) {this.school_name = school_name;}}

import java.util.List;public class Result {private int result;private List<Person> personData;public int getResult() {return result;}public void setResult(int result) {this.result = result;}public List<Person> getPersonData() {return personData;}public void setPersonData(List<Person> personData) {this.personData = personData;}}

接下来就可以使用gson包提供的Gson类进行import java.util.ArrayList;

import java.util.List;import com.google.gson.Gson;public class TestJson {    public static void main(String[] args) {        // TODO Auto-generated method stub        Result result = new Result();        result.setResult(1);        List<Person> list = new ArrayList<Person>();        result.setPersonData(list);        Person person1 = new Person();        person1.setName("nate");        person1.setAge(12);        person1.setUrl("http://www.baidu.com");        List<SchoolInfo> schools = new ArrayList<SchoolInfo>();        SchoolInfo schoolInfo1 = new SchoolInfo();        schoolInfo1.setSchool_name("清华");        SchoolInfo schoolInfo2 = new SchoolInfo();        schoolInfo2.setSchool_name("北大");        schools.add(schoolInfo1);        schools.add(schoolInfo2);        person1.setSchoolInfo(schools);        list.add(person1);                Person person2 = new Person();        person2.setName("jack");        person2.setAge(12);        person2.setUrl("http://www.sina.com");        List<SchoolInfo> schools1 = new ArrayList<SchoolInfo>();        SchoolInfo schoolInfo3 = new SchoolInfo();        schoolInfo3.setSchool_name("aaa");        SchoolInfo schoolInfo4 = new SchoolInfo();        schoolInfo4.setSchool_name("bbb");        schools1.add(schoolInfo3);        schools1.add(schoolInfo4);        person2.setSchoolInfo(schools1);        list.add(person2);                Gson gson = new Gson();        System.out.println(gson.toJson(result));    }}

gson下载链接
http://yunpan.cn/c3whd59gPps3Q 访问密码 d317

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