mybatis入门之简单操作

Mapper动态代理方式 

public class User {
private Integer id;
private String username;
private Date birthday;
private String sex;
private String address;

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public Date getBirthday() {
return birthday;
}

public void setBirthday(Date birthday) {
this.birthday = birthday;
}

public String getSex() {
return sex;
}

public void setSex(String sex) {
this.sex = sex;
}

public String getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}

public User() {
}

public User(Integer id, String username, Date birthday, String sex,
String address) {
super();
this.id = id;
this.username = username;
this.birthday = birthday;
this.sex = sex;
this.address = address;
}

@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", birthday="
+ birthday + ", sex=" + sex + ", address=" + address + "]";
}

public interface UserDao {

/* 此处定义的方法名称必须和mapper文件里面各个id名称保持一致**/
public User findUserById(int id);
public List<User>findUserByUsername(String username);
public void insertUser(User user);
public void updateUser(User user);
public void deleteUser(int id);
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zrf.mybatis.dao.UserDao">
<select id="findUserById" parameterType="int" resultType="com.zrf.mybatis.bean.User">
select * from user where id=#{id}
</select>
<select id="findUserByUsername" parameterType="java.lang.String" resultType="com.zrf.mybatis.bean.User">
select * from user where username like '%${value}%'
</select>
<insert id="insertUser" parameterType="com.zrf.mybatis.bean.User">
insert into user(username,birthday,sex,address)value(#{username},#{birthday},#{sex},#{address})
</insert>
<update id="updateUser" parameterType="com.zrf.mybatis.bean.User">
update user set username=#{username},birthday=#{birthday},sex=#{sex},address=#{address} where id=#{id}
</update>
<delete id="deleteUser" parameterType="int">
delete from user where id=#{id}
</delete>
</mapper>

<?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="developement">
<environment id="developement">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf8"/>
<property name="username" value="root"/>
<property name="password" value="000000"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/zrf/mybatis/mapping/UserMapper.xml"/>
</mappers>
</configuration>

public class Test {
public static void main(String[] args) throws Exception {
String resource="com/zrf/mybatis/config/SqlMapConfig.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
SqlSession sqlSession =sqlSessionFactory.openSession();
UserDao userDao=sqlSession.getMapper(UserDao.class);
//		 User user=userDao.findUserById(29);
//		 List<User>userList=userDao.findUserByUsername("小明");
//		 User user=new User();
//		 user.setUsername("孙志平2");
//		 user.setBirthday(new Date());
//		 user.setSex("2");
//		 user.setAddress("山西太原2");
//		 user.setId(32);
//		 userDao.updateUser(user);
userDao.deleteUser(32);
sqlSession.commit();
sqlSession.close();
//		 System.out.println(userList);
}
}