加入网路是否可用判断；删除一些log打印

lizhanwei

2020-03-04 7a7fcb374328afa2351c0ac22b8f2b7043fd0a0d

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[
  {
    "stu_id":1001,
    "ID": "410923198910162545",
    "name": "",
    "sex":2,
    "head_url":""
 
  }
]