读取JSON文件封装进对象

读取JSON文件，封装成对象

Gson、流

gson.fromJson

1. 引入依赖

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
</dependency>

​ 2、

 public static Map<String,Object> readJsonFile(String fileName){
        Gson gson = new Gson();
        String json = "";
        File file = new File(fileName);
        try {
            Reader reader = new InputStreamReader(new FileInputStream(file),"utf-8");
            int ch = 0;
            StringBuffer buffer = new StringBuffer();
            while ((ch = reader.read())!= -1){
                buffer.append((char) ch);
            }
            reader.close();
            json = buffer.toString();
            return gson.fromJson(json,Map.class);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

测试

    public static void main(String[] args) {  
       System.out.println(readJsonFile("D:\workspace\ZhuStudy\Demo01\src\main\resources\abc.json"));
    }
}