无数据头Json字符串
Json字符串只有数组，而次数组没有名字，如下
[
{
"name": "zhangsan",
"age": "10",
"phone": "11111",
"email": "[email protected]"
},
{
"name": "lisi",
"age": "20",
"phone": "22222",
"email": "[email protected]"
},
...
][
{
