package temp;

import tool.FileTool;

import com.google.gson.JsonElement;

import com.google.gson.JsonObject;

import com.google.gson.JsonParser;

public class GsonWithoutObjectDemo {

    public static void main(String[] args)  throws Exception{

        String text = FileTool.readFile("file/GsonWithoutObjectDemo.txt");

        JsonParser jsonParser = new JsonParser();//解析器

        JsonElement element = jsonParser.parse(text);//解析

        JsonObject jsonObj = element.getAsJsonObject();//转换成JsonObject

        System.out.println("jsonObj : "+jsonObj.toString());//jsonObject内容

        System.out.println("jsonObj 是否有该属性 : "+ jsonObj.has("PACKET"));//判断jsonObject 是否有PACKET属性存在

        String propertyValue =

                jsonObj.get("PACKET"). getAsJsonObject().

                            get("BODY").   getAsJsonObject().

                            get("PERSON").getAsJsonArray().get(0).getAsJsonObject().

                            get("NAME").toString();

        System.out.println("propertyValue="+propertyValue);

    }

}

{

  "PACKET": {

    "BODY": {

        "PERSON": [

          {

            "NAME": "bobo",

            "AGE": ""

          },

           {

            "NAME": "sisi",

            "AGE": ""

          }

        ]

    },

    "HEAD": {

      "TYPE": "I",

      "USERID": ""

    }

  }

}

从文件读取内容如下 : {  "PACKET": {    "BODY": {        "PERSON": [          {            "NAME": "ccc111",            "AGE": "18"          },           {            "NAME": "cccc222",            "AGE": "33"          }        ]    },    "HEAD": {      "TYPE": "I",      "USERID": "50000001"    }  }}

jsonObj : {"PACKET":{"BODY":{"PERSON":[{"NAME":"ccc111","AGE":"18"},{"NAME":"cccc222","AGE":"33"}]},"HEAD":{"TYPE":"I","USERID":"50000001"}}}

jsonObj 是否有该属性 : true

propertyValue="ccc111"