swift3.0 data转String 打印输出

 /*
         打印json数据
         */
        LJDownLoadNetImage.request("GET", url: "http://jsonplaceholder.typicode.com/users/1") { (data, respond, error) in
            data转String
            let str = String(data:data!, encoding: String.Encoding.utf8)!
            print(str)

        }

打印结果

{
  "id": 1,
  "name": "Leanne Graham",
  "username": "Bret",
  "email": "Sincere@april.biz",
  "address": {
    "street": "Kulas Light",
    "suite": "Apt. 556",
    "city": "Gwenborough",
    "zipcode": "92998-3874",
    "geo": {
      "lat": "-37.3159",
      "lng": "81.1496"
    }
  },
  "phone": "1-770-736-8031 x56442",
  "website": "hildegard.org",
  "company": {
    "name": "Romaguera-Crona",
    "catchPhrase": "Multi-layered client-server neural-net",
    "bs": "harness real-time e-markets"
  }
}