android Json解析全

gxw6 9年前發布 | 5K 次閱讀 Java JSON Android
方式一
1、實體類
public class Person {

private int age;
private String name;

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

@Override
public String toString() {
    return "Person [age=" + age + ", name=" + name + "]";
}

public int getAge() {
    return age;
}

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

public String getName() {
    return name;
}

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

public Person() {
    // TODO Auto-generated constructor stub
}


}</pre> 2、服務類
 
 

 
 

public class JsonList {

public JsonList() {
    // TODO Auto-generated constructor stub
}

public static List<Person> getList() {
    List<Person> list = new ArrayList<Person>();
    list.add(new Person(1002,"李四2"));
    list.add(new Person(1003,"李四3"));
    list.add(new Person(1001,"李四1"));
    return list;
}
public static Person getPerson(){
    return new Person(1002,"李四2"); 
}

}</pre> 


import net.sf.json.JSON;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;
public class JsonTools {

public JsonTools() {
    // TODO Auto-generated constructor stub
}

public static String getString(Person person) {
    JSON json = JSONSerializer.toJSON(JsonList.getPerson());
    return json.toString();
}

/**
 * 
 * @param msgString
 * @return
 */
public static Person getPerson(String msgString) {
    Person person = new Person();
    JSONArray array = new JSONArray();
    array.add(msgString);
    JSONObject obj = array.getJSONObject(0);
    // System.out.println(obj.get("age"));
    // System.out.println(obj.get("name"));
    person.setAge(obj.getInt("age"));
    person.setName(obj.getString("name"));
    return person;
}

public static String getListString(List<Person> listPersons) {
    JSON json = JSONSerializer.toJSON(listPersons);
    return json.toString();
}


/**
 * 將一個json格式的字符串轉換成行對應的對象
 * @param str
 * @return
 */
public static List<Person> getPersons(String str) {
    List<Person> list = new ArrayList<Person>();
    JSONArray array = new JSONArray();
    array.add(str);
    JSONArray array2 = array.getJSONArray(0);
    for (int i = 0; i <array2.size(); i++) {
        JSONObject jsonObject =  array2.getJSONObject(i);
        Person person = new Person();
        person.setAge(jsonObject.getInt("age"));
        person.setName(jsonObject.getString("name"));
        list.add(person);
    }
    return list;
}



}
</pre>
 
 

 
 
 方式二
 1、實體類 

 
 

public class Person {

private int age;
private String name;

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

@Override
public String toString() {
    return "Person [age=" + age + ", name=" + name + "]";
}

public int getAge() {
    return age;
}

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

public String getName() {
    return name;
}

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

public Person() {
    // TODO Auto-generated constructor stub
}


}</pre> 

 2、服務類
 
 

 
 

public class JsonList {

public JsonList() {
    // TODO Auto-generated constructor stub
}

public static List<Person> getList() {
    List<Person> list = new ArrayList<Person>();
    list.add(new Person(1002,"李四2"));
    list.add(new Person(1003,"李四3"));
    list.add(new Person(1001,"李四1"));
    return list;
}
public static Person getPerson(){
    return new Person(1002,"李四2"); 
}

}
</pre> 

 


import net.sf.json.JSON;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;
public class JsonTools {

public JsonTools() {
    // TODO Auto-generated constructor stub
}

public static String getString(Person person) {
    JSON json = JSONSerializer.toJSON(JsonList.getPerson());
    return json.toString();
}

/**
 * 
 * @param msgString
 * @return
 */
public static Person getPerson(String msgString) {
    Person person = new Person();
    JSONArray array = new JSONArray();
    array.add(msgString);
    JSONObject obj = array.getJSONObject(0);
    // System.out.println(obj.get("age"));
    // System.out.println(obj.get("name"));
    person.setAge(obj.getInt("age"));
    person.setName(obj.getString("name"));
    return person;
}

public static String getListString(List<Person> listPersons) {
    JSON json = JSONSerializer.toJSON(listPersons);
    return json.toString();
}


/**
 * 將一個json格式的字符串轉換成行對應的對象
 * @param str
 * @return
 */
public static List<Person> getPersons(String str) {
    List<Person> list = new ArrayList<Person>();
    JSONArray array = new JSONArray();
    array.add(str);
    JSONArray array2 = array.getJSONArray(0);
    for (int i = 0; i <array2.size(); i++) {
        JSONObject jsonObject =  array2.getJSONObject(i);
        Person person = new Person();
        person.setAge(jsonObject.getInt("age"));
        person.setName(jsonObject.getString("name"));
        list.add(person);
    }
    return list;
}




}</pre> 

 方式三
 
 

 1、實體類 

 
 

public class Person {

private String name;
private int age;
private String address;

public String getName() {
    return name;
}

public Person(String name, int age, String address) {
    super();
    this.name = name;
    this.age = age;
    this.address = address;
}

@Override
public String toString() {
    return "Person [name=" + name + ", age=" + age + ", address=" + address
            + "]";
}

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

public int getAge() {
    return age;
}

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

public String getAddress() {
    return address;
}

public void setAddress(String address) {
    this.address = address;
}

public Person() {
    // TODO Auto-generated constructor stub
}


}
</pre> 

 

 2、服務類
 
 

 
 

import com.android.domain.Person;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
public class GsonTools {

public GsonTools() {
    // TODO Auto-generated constructor stub
}

public static String createGsonString(Object object) {
    Gson gson = new Gson();
    String gsonString = gson.toJson(object);
    return gsonString;
}

public static <T> T changeGsonToBean(String gsonString, Class<T> cls) {
    Gson gson = new Gson();
    T t = gson.fromJson(gsonString, cls);
    return t;
}

public static <T> List<T> changeGsonToList(String gsonString, Class<T> cls) {
    Gson gson = new Gson();
    List<T> list_person = gson.fromJson(gsonString,
            new TypeToken<List<T>>() {
            }.getType());
    return list_person;
}

public static List<Map<String, Object>> changeGsonToListMaps(String gsonString) {
    List<Map<String, Object>> list = null;
    Gson gson = new Gson();
    list = gson.fromJson(gsonString,
            new TypeToken<List<Map<String, Object>>>() {
            }.getType());
    return list;
}




}
</pre> 

 

 方式四
 
 

 1、實體類 

 
 

public class Person {

private String name;
private int age;
private String address;

public String getName() {
    return name;
}

public Person(String name, int age, String address) {
    super();
    this.name = name;
    this.age = age;
    this.address = address;
}

@Override
public String toString() {
    return "Person [name=" + name + ", age=" + age + ", address=" + address
            + "]";
}

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

public int getAge() {
    return age;
}

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

public String getAddress() {
    return address;
}

public void setAddress(String address) {
    this.address = address;
}

public Person() {
    // TODO Auto-generated constructor stub
}


}
</pre> 


 
 

 2、服務類 

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.alibaba.fastjson.asm.Type;
import com.alibaba.fastjson.util.TypeUtils;
public class FastJsonTools {

public FastJsonTools() {
    // TODO Auto-generated constructor stub
}

public static String createJsonString(Object object) {
    String jsonString = JSON.toJSONString(object);
    return jsonString;
}

public static <T> T createJsonBean(String jsonString, Class<T> cls) {
    T t = JSON.parseObject(jsonString, cls);
    return t;
}

public static <T> List<T> createJsonToListBean(String jsonString,
        Class<T> cls) {
    List<T> list = null;
    list = JSON.parseArray(jsonString, cls);
    return list;
}

/**
 * @param jsonString
 * @return
 */
public static List<Map<String, Object>> createJsonToListMap(
        String jsonString) {
    List<Map<String, Object>> list2 = JSON.parseObject(jsonString,
            new TypeReference<List<Map<String, Object>>>() {
            });
    return list2;
}

/**
 * @param args
 */
public static void main(String[] args) {
    // TODO Auto-generated method stub
    // Person person1 = new Person("張三1", 24, "北京1");
    // Person person2 = new Person("張三2", 23, "北京2");
    // List<Person> list = new ArrayList<Person>();
    // list.add(person1);
    // list.add(person2);
    List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
    Map<String, Object> map = new HashMap<String, Object>();
    map.put("name", "jack");
    map.put("age", 23);
    Map<String, Object> map2 = new HashMap<String, Object>();
    map2.put("name", "rose");
    map2.put("age", 24);
    list.add(map);
    list.add(map2);

    String jsonString = JSON.toJSONString(list);
    System.out.println(jsonString);
    // JSON.parseArray(arg0, arg1)
    List<Map<String, Object>> list2 = JSON.parseObject(jsonString,
            new TypeReference<List<Map<String, Object>>>() {
            });
    // List<Person> lists = JSON.parseArray(arg0, arg1);
    System.out.println(list2.toString());

}


}
</pre>
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Java JSON Android
android Json解析全

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