json陣列:

[
    {
        "address": "中國",
        "age": 30,
        "name": "小明",
        "sex": "boy"
    },
    {
        "address": "加拿大",
        "age": 20,
        "name": "小雨",
        "sex": "girl"
    }
]

解析程式碼如下：

建立對應實體類：

public class Bean {

    public String name;
    public int age;
    public
 
 String sex;
    public String address;
}

解析程式碼：

    String strJson = "[\n" +
                "    {\n" +
                "        \"address\": \"中國\",\n" +
                "        \"age\": 30,\n" +
                "        \"name\": \"小明\",\n" +
                "        \"sex\": \"boy\"\n" +
                "    }
 
,\n" +
                "    {\n" +
                "        \"address\": \"加拿大\",\n" +
                "        \"age\": 20,\n" +
                "        \"name\": \"小雨\",\n" +
                "        \"sex\": \"girl\"\n" +
                "    }\n" +
                "]";
        Gson gson = new Gson();//建立Gson物件
        JsonParser jsonParser = new JsonParser();
        JsonArray jsonElements = jsonParser.parse(strJson).getAsJsonArray();//獲取JsonArray物件
        ArrayList<Bean> beans = new ArrayList<>();
        for (JsonElement bean : jsonElements) {
 

            Bean bean1 = gson.fromJson(bean, Bean.class);//解析
            beans.add(bean1);
        }
        System.out.println(beans.size());
        System.out.println(beans.get(1).name);

反過來，如何將物件生成json了，程式碼如下：

      Map<String, Object> map = new HashMap<>();
        map.put("name", "小明");
        map.put("age", 30);
        map.put("address", "中國");
        map.put("sex", "boy");
        List<Map<String, Object>> list = new ArrayList<>();
        list.add(map);
        String s = new Gson().toJson(list);//生成jsonString
        System.out.println(s);