一、创建数据表(MySql)
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-- ----------------------------
-- Table structure for admininfo
-- ----------------------------
DROP
TABLE
IF EXISTS `admininfo`;
CREATE
TABLE
`admininfo` (
`ID`
int
(11)
NOT
NULL
AUTO_INCREMENT,
`AdminName`
varchar
(20)
NOT
NULL
,
PRIMARY
KEY
(`ID`)
) ENGINE=InnoDB AUTO_INCREMENT=25
DEFAULT
CHARSET=latin1;
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二、创建mybatis的配置文件：mybatisConf.xml，由于使用maven进行管理，所以放在java-->resources文件夹下，其它位置也可以，只有最终在\target\classes\mybatisConf.xml生成文件即可
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<?
xml
version
=
"1.0"
encoding
=
"UTF-8"
?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<
configuration
>
<
environments
default
=
"development"
>
<
environment
id
=
"development"
>
<
transactionManager
type
=
"JDBC"
/>
<!-- 配置数据库连接信息 -->
<
dataSource
type
=
"POOLED"
>
<
property
name
=
"driver"
value
=
"com.mysql.jdbc.Driver"
/>
<
property
name
=
"username"
value
=
"root"
/>
<
property
name
=
"password"
value
=
"root"
/>
</
dataSource
>
</
environment
>
</
environments
>
<
mappers
>
<!-- 注册映射接口，该接口文件包含了数据访问方法和SQL -->
<
mapper
class
=
"dal.dataaccess.IAdminInfoMapper"
/>
</
mappers
>
</
configuration
>
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三、创建IAdminInfoMapper文件（本文中包名为dal.dataaccess)
该接口的功能主要是提供对AdminInfo表的数据操作
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package
dal.dataaccess;
import
java.util.List;
import
org.apache.ibatis.annotations.Delete;
import
org.apache.ibatis.annotations.Insert;
import
org.apache.ibatis.annotations.Select;
import
org.apache.ibatis.annotations.Update;
import
dal.beans.AdminInfo;
import
dal.beans.AdminRightInfo;
public
interface
IAdminInfoMapper {
//使用@Select注解指明getById方法要执行的SQL
@Select
(
"select * from admininfo where id=#{id}"
)
public
AdminInfo getById(
int
id);
//使用@Select注解指明getAll方法要执行的SQL
@Select
(
"select * from admininfo"
)
public
List<AdminInfo> getAll();
//使用@Insert注解指明add方法要执行的SQL
@Insert
(
"insert into admininfo(adminName) values(#{adminName})"
)
public
int
add(AdminInfo user);
//使用@Update注解指明update方法要执行的SQL
@Update
(
"update admininfo set adminName=#{adminName} where id=#{id}"
)
public
int
update(AdminInfo user);
//使用@Delete注解指明deleteById方法要执行的SQL
@Delete
(
"delete from admininfo where id=#{id}"
)
public
int
deleteById(
int
id);
}
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四、定义操作数据库的公共方法
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package
framework.utils;
import
java.io.InputStream;
import
org.apache.ibatis.session.SqlSession;
import
org.apache.ibatis.session.SqlSessionFactory;
import
org.apache.ibatis.session.SqlSessionFactoryBuilder;
public
class
MyBatisUtil {
/**
* 获取SqlSessionFactory
*
* @return SqlSessionFactory
*/
public
static
SqlSessionFactory getSqlSessionFactory() {
String resource =
"mybatisConf.xml"
;
InputStream is = MyBatisUtil.
class
.getClassLoader().getResourceAsStream(resource);
SqlSessionFactory factory =
new
SqlSessionFactoryBuilder().build(is);
return
factory;
}
/**
* 获取SqlSession
*
* @return SqlSession
*/
public
static
SqlSession getSqlSession() {
return
getSqlSessionFactory().openSession();
}
/**
* 获取SqlSession
*
* @param isAutoCommit
* true 表示创建的SqlSession对象在执行完SQL之后会自动提交事务 false
* 表示创建的SqlSession对象在执行完SQL之后不会自动提交事务，这时就需要我们手动调用sqlSession.
* commit()提交事务
* @return SqlSession
*/
public
static
SqlSession getSqlSession(
boolean
isAutoCommit) {
return
getSqlSessionFactory().openSession(isAutoCommit);
}
}
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五、对adminInfo表进行增删改查
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package
test;
import
java.util.List;
import
org.apache.ibatis.session.SqlSession;
import
org.junit.Test;
import
dal.beans.*;
import
framework.utils.MyBatisUtil;
import
dal.dataaccess.*;
public
class
MybatisAnnotationTest {
@Test
public
void
Select() {
SqlSession sqlSession = MyBatisUtil.getSqlSession();
// 得到AdminInfoMapper接口的实现类对象，IAdminInfoMapper接口的实现类对象由sqlSession.getMapper(IAdminInfoMapper.class)动态构建出来
IAdminInfoMapper mapper = sqlSession.getMapper(IAdminInfoMapper.
class
);
// 执行查询操作，将查询结果自动封装成User返回
AdminInfo bean = mapper.getById(
13
);
// 使用SqlSession执行完SQL之后需要关闭SqlSession
sqlSession.close();
System.out.println(bean.getId());
System.out.println(bean.getAdminName());
}
@Test
public
void
SelectAll() {
SqlSession sqlSession = MyBatisUtil.getSqlSession();
IAdminInfoMapper mapper = sqlSession.getMapper(IAdminInfoMapper.
class
);
List<AdminInfo> bean = mapper.getAll();
sqlSession.close();
System.out.println(bean.size());
}
@Test
public
void
Insert() {
SqlSession sqlSession = MyBatisUtil.getSqlSession();
IAdminInfoMapper mapper = sqlSession.getMapper(IAdminInfoMapper.
class
);
AdminInfo bean =
new
AdminInfo();
bean.setAdminName(
"Admin"
+ System.currentTimeMillis());
int
result = mapper.add(bean);
sqlSession.commit();
sqlSession.close();
System.out.println(result);
}
@Test
public
void
Update() {
SqlSession sqlSession = MyBatisUtil.getSqlSession();
IAdminInfoMapper mapper = sqlSession.getMapper(IAdminInfoMapper.
class
);
AdminInfo bean =
new
AdminInfo();
bean.setId(
12
);
bean.setAdminName(
"Admin"
+ System.currentTimeMillis());
int
result = mapper.update(bean);
sqlSession.commit();
sqlSession.close();
System.out.println(result);
}
@Test
public
void
Delete() {
SqlSession sqlSession = MyBatisUtil.getSqlSession();
IAdminInfoMapper mapper = sqlSession.getMapper(IAdminInfoMapper.
class
);
int
result = mapper.deleteById(
12
);
sqlSession.commit();
sqlSession.close();
System.out.println(result);
}
}
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六、由于使用了maven进行依赖管理，pom.xml还需要添加
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<
dependency
>
<
groupId
>mysql</
groupId
>
<
artifactId
>mysql-connector-java</
artifactId
>
<
version
>5.1.38</
version
>
</
dependency
>
<
dependency
>
<
groupId
>org.mybatis</
groupId
>
<
artifactId
>mybatis</
artifactId
>
<
version
>3.3.0</
version
>
</
dependency
>
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