go get github.com/zhuxiujia/GoMybatis
go get github.com/go-sql-driver/mysql

import (
	_ "github.com/go-sql-driver/mysql" //导入mysql驱动
	"GoMybatis"
	"fmt"
	"time"
)

//定义xml内容，建议以*Mapper.xml文件存于项目目录中,在编辑xml时就可享受GoLand等IDE渲染和智能提示。生产环境可以使用statikFS把xml文件打包进程序里

var xmlBytes = []byte(`
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"https://raw.githubusercontent.com/zhuxiujia/GoMybatis/master/mybatis-3-mapper.dtd">
<mapper namespace="ActivityMapperImpl">
    <!--SelectAll(result *[]Activity)error-->
    <select id="selectAll">
        select * from biz_activity where delete_flag=1 order by create_time desc
    </select>
</mapper>
`)

type ExampleActivityMapperImpl struct {
     SelectAll  func() ([]Activity, error)
}

func main() {
    var engine = GoMybatis.GoMybatisEngine{}.New()
	//Mysql链接格式 用户名:密码@(数据库链接地址:端口)/数据库名称,如root:123456@(***.com:3306)/test
	err := engine.Open("mysql", "*?charset=utf8&parseTime=True&loc=Local")
	if err != nil {
	   panic(err)
	}
	var exampleActivityMapperImpl ExampleActivityMapperImpl
	
	//加载xml实现逻辑到ExampleActivityMapperImpl
	engine.WriteMapperPtr(&exampleActivityMapperImpl, xmlBytes)

	//使用mapper
	result, err := exampleActivityMapperImpl.SelectAll(&result)
        if err != nil {
	   panic(err)
	}
	fmt.Println(result)
}

        //添加第二个mysql数据库,请把MysqlUri改成你的第二个数据源链接
	GoMybatis.Open("mysql", MysqlUri)
	//动态数据源路由
	var router = GoMybatis.GoMybatisDataSourceRouter{}.New(func(mapperName string) *string {
		//根据包名路由指向数据源
		if strings.Contains(mapperName, "example.") {
			var url = MysqlUri//第二个mysql数据库,请把MysqlUri改成你的第二个数据源链接
			fmt.Println(url)
			return &url
		}
		return nil
	})

	engine.SetLogEnable(true)
	engine.SetLog(&GoMybatis.LogStandard{
		PrintlnFunc: func(messages []byte) {
		},
	})

 //传统数据库
 Mysql: github.com/go-sql-driver/mysql
 MyMysql: github.com/ziutek/mymysql/godrv
 Postgres: github.com/lib/pq
 SQLite: github.com/mattn/go-sqlite3
 MsSql: github.com/denisenkom/go-mssqldb
 MsSql: github.com/lunny/godbc
 Oracle: github.com/mattn/go-oci8
 //分布式NewSql数据库
 Tidb: github.com/pingcap/tidb
 CockroachDB(也是Postgres驱动): github.com/lib/pq

//嵌套事务的服务
type TestService struct {
   exampleActivityMapper *ExampleActivityMapper //服务包含一个mapper操作数据库，类似java spring mvc
   UpdateName   func(id string, name string) error   `tx:"" rollback:"error"`
   UpdateRemark func(id string, remark string) error `tx:"" rollback:"error"`
}
func main()  {
   var testService TestService
   testService = TestService{
   	exampleActivityMapper: &exampleActivityMapper,
   	UpdateRemark: func(id string, remark string) error {
   		testService.exampleActivityMapper.SelectByIds([]string{id})
   		panic(errors.New("业务异常")) // panic 触发事务回滚策略
   		return nil                   // rollback:"error"指定了返回error类型 且不为nil 就会触发事务回滚策略
   	},
   	UpdateName: func(id string, name string) error {
   		testService.exampleActivityMapper.SelectByIds([]string{id})
   		return nil
   	},
   }
   GoMybatis.AopProxyService(&testService, &engine)//必须使用AOP代理服务的func
   testService.UpdateRemark("1","remark")
}

  //step1 定义你的数据库模型,必须包含 json注解（默认为数据库字段）, gm:""注解指定 值是否为 id,version乐观锁,logic逻辑软删除
  type UserAddress struct {
	Id            string `json:"id" gm:"id"`
	UserId        string `json:"user_id"`
	RealName      string `json:"real_name"`
	Phone         string `json:"phone"`
	AddressDetail string `json:"address_detail"`

	Version    int       `json:"version" gm:"version"`
	CreateTime time.Time `json:"create_time"`
	DeleteFlag int       `json:"delete_flag" gm:"logic"`
}

//第二步，在你项目main 目录下建立一个 XmlCreateTool.go 内容如下
func main() {
	var bean = UserAddress{} //此处只是举例，应该替换为你自己的数据库模型
	GoMybatis.OutPutXml(reflect.TypeOf(bean).Name()+"Mapper.xml", GoMybatis.CreateXml("biz_"+GoMybatis.StructToSnakeString(bean), bean))
}

//第三步，执行命令，在当前目录下得到 UserAddressMapper.xml文件
go run XmlCreateTool.go

//以下是自动生成的xml文件内容
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "https://raw.githubusercontent.com/zhuxiujia/GoMybatis/master/mybatis-3-mapper.dtd">
<mapper>
    <!--logic_enable 逻辑删除字段-->
    <!--logic_deleted 逻辑删除已删除字段-->
    <!--logic_undelete 逻辑删除 未删除字段-->
    <!--version_enable 乐观锁版本字段,支持int,int8,int16,int32,int64-->
    <resultMap id="BaseResultMap" tables="biz_user_address">
    <id column="id" property="id"/>
	<result column="id" property="id" langType="string"   />
	<result column="user_id" property="user_id" langType="string"   />
	<result column="real_name" property="real_name" langType="string"   />
	<result column="phone" property="phone" langType="string"   />
	<result column="address_detail" property="address_detail" langType="string"   />
	<result column="version" property="version" langType="int" version_enable="true"  />
	<result column="create_time" property="create_time" langType="Time"   />
	<result column="delete_flag" property="delete_flag" langType="int"  logic_enable="true" logic_undelete="1" logic_deleted="0" />
    </resultMap>
</mapper>