Add tool dir.

code/tool/util/util_string.go

@@ -0,0 +1,42 @@
+package util
+
+import (
+	"fmt"
+	"strconv"
+)
+
+//把一个大小转变成方便读的格式
+//human readable file size
+func HumanFileSize(bytes int64) string {
+	var thresh int64 = 1024
+
+	if bytes < 0 {
+		bytes = 0
+	}
+	if bytes < thresh {
+		return fmt.Sprintf("%dB", bytes)
+	}
+	var units = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
+
+	var u = 0
+	var tmp = float64(bytes)
+	var standard = float64(thresh)
+	for tmp >= standard && u < len(units)-1 {
+		tmp /= float64(standard)
+		u++
+	}
+
+	numStr := strconv.FormatFloat(tmp, 'f', 1, 64)
+
+	return fmt.Sprintf("%s%s", numStr, units[u])
+}
+
+//获取MySQL的URL
+func GetMysqlUrl(
+	mysqlPort int,
+	mysqlHost string,
+	mysqlSchema string,
+	mysqlUsername string,
+	mysqlPassword string) string {
+	return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8&parseTime=True&loc=Local", mysqlUsername, mysqlPassword, mysqlHost, mysqlPort, mysqlSchema)
+}