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": "[e-mail]",  "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"  }}