fastjson的使用

package sdk;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.JSONObject;

import java.util.ArrayList;

public class Test2 {
    private String name;
    private String sex;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }

    //json字符串转化为JSONObject类
    public static JSONObject JSON2Object(String json){
        JSONObject object=(JSONObject) JSONObject.parseObject(json);
        return object;
    }
    //json的list转化为ArrayList<JSONObject>
    public static ArrayList<JSONObject> JSONList2Object(String jsonList){
        ArrayList<JSONObject> objectList=(ArrayList<JSONObject>) JSONObject.parseObject(jsonList,ArrayList.class);
        return objectList;
    }

    //object转化为json
    public static String Object2JSON(Object o){
        return JSON.toJSONString(o);
    }

    public static void main(String[] args) {

        String json="{\"username\": \"Bonnie\",\"listData\": [{\"address\": \"石景山区\",\"street\": \"裕华路\"},{\"address\": \"海淀区\",\"street\": \"中山路\"}]}";
        try{
            //1、测试json转换成object
            JSONObject object=JSON2Object(json);
            String username=(String) object.get("username");
            System.out.println(username);

            String listData=String.valueOf(object.get("listData"));
            //(String) object.get("listData");
            System.out.println(listData+"+++++++++++++");

            ArrayList<JSONObject> objectList=JSONList2Object(listData);
            System.out.println("JSONList2Object----------------");
            for(int i=0;i<objectList.size();i++){
                System.out.println((String)((JSONObject) (objectList.toArray())[i]).get("address"));
                System.out.println((String)((JSONObject) (objectList.toArray())[i]).get("street"));
            }
            //2、测试object转化成json
            Test2 t=new Test2();
            t.setName("Bonnie");
            t.setSex("female");

            System.out.println(Object2JSON(t));
        }catch(JSONException e){
            e.printStackTrace();
        }
    }
}

　　

测试demo

需要导入的jar包

<dependency>
   　　<groupId>com.alibaba</groupId>
  　　 <artifactId>fastjson</artifactId>
  　　 <version>1.2.2</version>
  </dependency>