goctl model reactor (#15)

* reactor sql generation

* reactor sql generation

* add console & example

* optimize unit test & add document

* modify default config

* remove test file

* Revert "remove test file"

This reverts commit 81041f9e

* fix stringx.go & optimize example

* remove unused code

tools/goctl/model/sql/gen/split.go

@@ -0,0 +1,23 @@
+package gen
+
+import (
+	"regexp"
+)
+
+func (g *defaultGenerator) split() []string {
+	reg := regexp.MustCompile(createTableFlag)
+	index := reg.FindAllStringIndex(g.source, -1)
+	list := make([]string, 0)
+	source := g.source
+	for i := len(index) - 1; i >= 0; i-- {
+		subIndex := index[i]
+		if len(subIndex) == 0 {
+			continue
+		}
+		start := subIndex[0]
+		ddl := source[start:]
+		list = append(list, ddl)
+		source = source[:start]
+	}
+	return list
+}