将对象以json格式写入到文件中

将 list 对象以json格式写入到文件中

try {
      ObjectMapper mapper = new ObjectMapper();
      String value = mapper.writeValueAsString(list);
      OutputStream out =new FileOutputStream("D:/file/oms.json");
      byte[] b=value.getBytes();
      for(int i=;i<b.length;i++){
          out.write(b[i]);
      }
      out.close();
} catch (IOException e) {
  logger.info("序列化失败......");
  e.printStackTrace();
}

结果如下所示：

[{"id":"","length":22.2},
{"id":"","length":23.37},
{"id":"","length":23.37}
]