Android开源框架——网络解析GSON

准备工作

GSON下载地址:http://download.csdn.net/detail/wiseclown/9496184
官网地址：https://github.com/google/gson

JavaBean(自定义):

public class Student {    private String id;    private String name;    private String sex;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getSex() {        return sex;    }    public void setSex(String sex) {        this.sex = sex;    }}

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读JSON数据

//单个对象String json = "{\"id\":\"0001\",\"name\":\"zs\",\"sex\":\"male\"}";Gson gson = new Gson();Student student = gson.fromJson(json,Student.class);//多个对象json数组String json = "[{\"id\":\"0001\",\"name\":\"zs\",\"sex\":\"male\"}, {\"id\":\"0002\",\"name\":\"ls\",\"sex\":\"male\"}]";Gson gson = new Gson();List<Student> studentList = gson.fromJson(json,new TypeToken<List<Student>)(){}.getType();

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从文件中读取JSON数据

student2.json
[{“id”:”000001”,”name”:”wz”,”sex”:”male”},
 {“id”:”000002”,”name”:”zs”,”sex”:”male”},
 {“id”:”000003”,”name”:”wf”,”sex”:”female”}
]

File file = new File(Environment.getExternalStorageDirectory(),"student2.json");Gson gson = new Gson();try{    List<Student> studentList = gson.fromJson(new      InputStreamReader(new FileInputStream(file)),new       TypeToken<List<Student>(){}.getType());}catch(FileNotFoundException e){    e.printStackTrace();}

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将JSON数据写入文件中

Student student = new Student();student.setId("1");student.setName("wz");student.setSex("male");Gson gson = new Gson();String jsonStr = gson.toJson(student);File file = new File(Environment.getExternalStorageDirectory(),"student.json");try{      FileOutputStream out = new FileOutputStream(file);      out.write(jsonStr.getBytes("UTF-8"));} catch (FileNotFoundException e) {      e.printStackTrace();} catch (IOException e) {      e.printStackTrace();}