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/util/stringurtl_test.go

@@ -1,12 +0,0 @@
-package util
-
-import (
-	"fmt"
-	"testing"
-)
-
-func TestFormatField(t *testing.T) {
-	var in = "go_java"
-	snakeCase, upperCase, lowerCase := FormatField(in)
-	fmt.Println(snakeCase, upperCase, lowerCase)
-}

tools/goctl/model/sql/util/stringutil.go

@@ -1,48 +0,0 @@
-package util
-
-import (
-	"strings"
-	"unicode"
-)
-
-func FormatField(field string) (snakeCase, upperCamelCase, lowerCamelCase string) {
-	snakeCase = field
-	list := strings.Split(field, "_")
-	upperCaseList := make([]string, 0)
-	lowerCaseList := make([]string, 0)
-	for index, word := range list {
-		upperStart := convertUpperStart(word)
-		lowerStart := convertLowerStart(word)
-		upperCaseList = append(upperCaseList, upperStart)
-		if index == 0 {
-			lowerCaseList = append(lowerCaseList, lowerStart)
-		} else {
-			lowerCaseList = append(lowerCaseList, upperStart)
-		}
-	}
-	upperCamelCase = strings.Join(upperCaseList, "")
-	lowerCamelCase = strings.Join(lowerCaseList, "")
-	return
-}
-
-func convertLowerStart(in string) string {
-	var resp []rune
-	for index, r := range in {
-		if index == 0 {
-			r = unicode.ToLower(r)
-		}
-		resp = append(resp, r)
-	}
-	return string(resp)
-}
-
-func convertUpperStart(in string) string {
-	var resp []rune
-	for index, r := range in {
-		if index == 0 {
-			r = unicode.ToUpper(r)
-		}
-		resp = append(resp, r)
-	}
-	return string(resp)
-}