1.新建对象
新建对象Employee
package org.mybatis.crud;
public class Employee {
private Integer id;
private String lastName;
private String email;
private String gender;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
@Override
public String toString() {
return "Employee [id=" + id + ", lastName=" + lastName + ", email=" + email
+ ", gender=" + gender + "]";
}
}
2.新建Mapper接口
新建EmployeeMapper接口
package org.mybatis.crud;
public interface EmployeeMapper {
public Employee getEmployeeById(int id);
public void addEmployee(Employee employee);
public void updateEmployee(Employee employee);
public void deleteEmployee(int id);
}
3.新建Mapper配置文件
新建配置文件crudmapper.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="org.mybatis.crud.EmployeeMapper">
<!-- 查询方法 -->
<!-- 传递单个参数，不用做特殊处理直接使用：#{任意名称的参数} -->
<select id="getEmployeeById" resultType="org.mybatis.crud.Employee">
select * from mybatis_employee where id ={id}
</select>
<!-- 插入方法 -->
<insert id="addEmployee" parameterType="org.mybatis.crud.Employee">
insert into mybatis_employee
(last_name,email,gender)
values
(#{lastName},#{email},#{gender});
</insert>
<!-- 更新方法 -->
<update id="updateEmployee">
update mybatis_employee
set
last_name ={lastName},
email ={email},
gender ={gender}
where
id ={id}
</update>
<!-- 删除方法 -->
<delete id="deleteEmployee">
delete from mybatis_employee where id ={id}
</delete>
</mapper>
4.新建主配置文件
新建mybatis-config-crud.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>
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="${mysql.driver}" />
<property name="url" value="${mysql.url}" />
<property name="username" value="${mysql.username}" />
<property name="password" value="${mysql.password}" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="mapper/crudmapper.xml"/>
</mappers>
</configuration>
6.新建测试类
package org.mybatis.crud;
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.Test;
/**
* 使用接口式編程
* @author DDKK.COM 弟弟快看，程序员编程资料站
*
*/
public class MybatisTest {
public SqlSessionFactory getSqlSessionFactory() throws IOException{
String resource = "mybatis-config-crud.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
return sqlSessionFactory;
}
@Test
public void testMybatisSelect() {
//测试查询
SqlSessionFactory sqlSessionFactory = null;
SqlSession sqlSession = null;
try {
sqlSessionFactory = getSqlSessionFactory();
sqlSession = sqlSessionFactory.openSession();
EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
Employee employee = mapper.getEmployeeById(1);
System.out.println("--------------------------" + employee + "--------------------------");
} catch (IOException e) {
e.printStackTrace();
} finally {
sqlSession.close();
}
}
@Test
public void testMybatisAdd() {
//测试添加
SqlSessionFactory sqlSessionFactory = null;
SqlSession sqlSession = null;
try {
sqlSessionFactory = getSqlSessionFactory();
//openSession可以添加参数，无参数表示不会自动提交，需要手动提交
// sqlSession = sqlSessionFactory.openSession();
sqlSession = sqlSessionFactory.openSession(true);
EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
Employee employee = new Employee();
//mysql数据库设置id自增，oracle数据库待续
employee.setLastName("huanhuan");
employee.setEmail("tang_man@sina.com");
employee.setGender("2");
mapper.addEmployee(employee);
// sqlSession.commit();
} catch (IOException e) {
e.printStackTrace();
} finally {
sqlSession.close();
}
}
@Test
public void testMybatisUpdate() {
//测试修改
SqlSessionFactory sqlSessionFactory = null;
SqlSession sqlSession = null;
try {
sqlSessionFactory = getSqlSessionFactory();
sqlSession = sqlSessionFactory.openSession();
EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
Employee employee = new Employee();
//数据库设置id自增
employee.setId(3);
employee.setLastName("panpan");
employee.setEmail("tang_man@sohu.com");
employee.setGender("1");
mapper.updateEmployee(employee);
sqlSession.commit();
} catch (IOException e) {
e.printStackTrace();
} finally {
sqlSession.close();
}
}
@Test
public void testMybatisDelete() {
//测试删除
SqlSessionFactory sqlSessionFactory = null;
SqlSession sqlSession = null;
try {
sqlSessionFactory = getSqlSessionFactory();
sqlSession = sqlSessionFactory.openSession();
EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
mapper.deleteEmployee(1);
sqlSession.commit();
} catch (IOException e) {
e.printStackTrace();
} finally {
sqlSession.close();
}
}
}