1、新建一个maven项目并在pom.xml中添加依赖
2、项目架构
配置文件：SqlMapConfig.xml
<?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>
<properties resource="db.properties">
</properties> <!-- 和spring整合后 environments配置将废除-->
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</dataSource>
</environment>
</environments> <mappers>
<package name="dongtian.TestMybatis.mapper"/>
</mappers>
</configuration>
POJO类
package dongtian.TestMybatis.pojo;
import java.util.Date;
public class User {
private int id;
private String username;
private Date birthday;
private String sex;
private String address;
public int getId() {
return id;
}
public void setId(int 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;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", birthday=" + birthday + ", sex=" + sex + ", address="
+ address + "]";
}
}
UserMapper接口
package dongtian.TestMybatis.mapper;
import dongtian.TestMybatis.pojo.User;
public interface UserMapper {
public void insertUser(User role);
//@Select("select * from user where username = #{username}")：可以使用注解的形式
public User findUsers(String username);
}
UserMapper.xml
<?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="dongtian.TestMybatis.mapper.UserMapper">
<insert id="insertUser" parameterType="dongtian.TestMybatis.pojo.User">
insert into user(username,sex,address)
values(#{username},#{sex},#{address})
</insert> <select id="findUsers" parameterType="String" resultType="dongtian.TestMybatis.pojo.User">
select * from user where username = #{username}
</select>
</mapper>
测试类
package dongtian.TestMybatis.Test; import java.io.IOException;
import java.io.InputStream; import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test; import dongtian.TestMybatis.mapper.UserMapper;
import dongtian.TestMybatis.pojo.User; public class MapperTest {
private SqlSessionFactory sqlSessionFactory;
@Before
public void setup() throws IOException {
String resource = "SqlMapConfig.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
} @Test
public void TestFindUsers() throws Exception{
SqlSession sqlSession = sqlSessionFactory.openSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
User user = userMapper.findUsers("张三");
System.out.println(user); } @Test
public void TestInsertUser() throws Exception{
SqlSession sqlSession =null;
try {
sqlSession = sqlSessionFactory.openSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
User user = new User();
user.setAddress("广东省广州市");
user.setUsername("林东");
user.setSex("男");
userMapper.insertUser(user);
sqlSession.commit();
System.out.println(user);
}catch(Exception e) {
sqlSession.rollback();
}finally {
if(sqlSession!=null) {
sqlSession.close();
}
}
} }