GF框架提供了非常强大的类型转换包gconv，可以实现将常用数据类型转换为指定的数据类型，对常用基本数据类型之间的无缝转换，同时也支持任意类型到struct对象的转换。由于gconv模块内部大量使用了断言而非反射，因此执行的效率非常高。
使用方式：
import "github.com/gogf/gf/util/gconv"
接口文档：
https://godoc.org/github.com/gogf/gf/util/gconv
基准测试：
john@john-B85M:~/Workspace/Go/GOPATH/src/github.com/gogf/gf/util/gconv$ go test *.go -bench=".*" -benchmem
goos: linux
goarch: amd64
BenchmarkString-4 20000000 71.8 ns/op 24 B/op 2 allocs/op
BenchmarkInt-4 100000000 22.2 ns/op 8 B/op 1 allocs/op
BenchmarkInt8-4 100000000 24.5 ns/op 8 B/op 1 allocs/op
BenchmarkInt16-4 50000000 23.8 ns/op 8 B/op 1 allocs/op
BenchmarkInt32-4 100000000 24.1 ns/op 8 B/op 1 allocs/op
BenchmarkInt64-4 100000000 21.7 ns/op 8 B/op 1 allocs/op
BenchmarkUint-4 100000000 22.2 ns/op 8 B/op 1 allocs/op
BenchmarkUint8-4 50000000 25.6 ns/op 8 B/op 1 allocs/op
BenchmarkUint16-4 50000000 32.1 ns/op 8 B/op 1 allocs/op
BenchmarkUint32-4 50000000 27.7 ns/op 8 B/op 1 allocs/op
BenchmarkUint64-4 50000000 28.1 ns/op 8 B/op 1 allocs/op
BenchmarkFloat32-4 10000000 155 ns/op 24 B/op 2 allocs/op
BenchmarkFloat64-4 10000000 177 ns/op 24 B/op 2 allocs/op
BenchmarkTime-4 5000000 240 ns/op 72 B/op 4 allocs/op
BenchmarkTimeDuration-4 50000000 26.2 ns/op 8 B/op 1 allocs/op
BenchmarkBytes-4 10000000 149 ns/op 128 B/op 3 allocs/op
BenchmarkStrings-4 10000000 223 ns/op 40 B/op 3 allocs/op
BenchmarkInts-4 20000000 55.0 ns/op 16 B/op 2 allocs/op
BenchmarkFloats-4 10000000 186 ns/op 32 B/op 3 allocs/op
BenchmarkInterfaces-4 20000000 66.6 ns/op 24 B/op 2 allocs/op
PASS
ok command-line-arguments 35.356s