3. Insert
4. update
5. Delete
示例代码(依次)
package com.alice.dao;
import com.alice.pojo.User;
import java.util.List;
public interface UserMapper {
List<User> getUserList();
User getUserById(String id);
int addUser(User user);
int updateUser(User user);
int deleteUser(String id);
List<User> getUserListByLike(String name);
}
import com.alice.pojo.User;
import java.util.List;
public interface UserMapper {
List<User> getUserList();
User getUserById(String id);
int addUser(User user);
int updateUser(User user);
int deleteUser(String id);
List<User> getUserListByLike(String name);
}
<?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.alice.dao.UserMapper">
<select id="getUserList" resultType="User">
select * from `mybatis-alice-01`.user;
</select>
<select id="getUserListByLike" resultType="User">
select * from `mybatis-alice-01`.user where name like "%"#{name}"%";
</select>
<select id="getUserById" resultType="User" parameterType="String">
select * from `mybatis-alice-01`.user where id = #{id};
</select>
<insert id="addUser" parameterType="User">
insert into `mybatis-alice-01`.user (id ,name ,pad ) values (#{id},#{name },#{pad });
</insert>
<update id="updateUser" parameterType="User">
update `mybatis-alice-01`.user
set name = #{name } ,pad=#{pad }
where id= #{id};
</update>
<delete id="deleteUser" parameterType="String">
delete from `mybatis-alice-01`.user where id=#{id};
</delete>
</mapper>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.alice.dao.UserMapper">
<select id="getUserList" resultType="User">
select * from `mybatis-alice-01`.user;
</select>
<select id="getUserListByLike" resultType="User">
select * from `mybatis-alice-01`.user where name like "%"#{name}"%";
</select>
<select id="getUserById" resultType="User" parameterType="String">
select * from `mybatis-alice-01`.user where id = #{id};
</select>
<insert id="addUser" parameterType="User">
insert into `mybatis-alice-01`.user (id ,name ,pad ) values (#{id},#{name },#{pad });
</insert>
<update id="updateUser" parameterType="User">
update `mybatis-alice-01`.user
set name = #{name } ,pad=#{pad }
where id= #{id};
</update>
<delete id="deleteUser" parameterType="String">
delete from `mybatis-alice-01`.user where id=#{id};
</delete>
</mapper>
package com.alice.dao;
import com.alice.pojo.User;
import com.alice.utils.MyBatisUtils;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import java.util.List;
public class UserDaoTest {
@Test
public void test(){
SqlSession sqlSession= MyBatisUtils.getSqlSession();
UserMapper userMapper =sqlSession.getMapper(UserMapper.class);
List<User>userList= userMapper.getUserList();
for (User user : userList) {
System.out.println(user);
}
sqlSession.close();
}
@Test
public void getUserById(){
SqlSession sqlSession=MyBatisUtils.getSqlSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
User user=userMapper.getUserById("1234567");
System.out.println(user);
sqlSession.close();
}
@Test
public void addUser(){
SqlSession sqlSession=MyBatisUtils.getSqlSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
userMapper.addUser(new User("123456789","9","123456"));
sqlSession.commit();
sqlSession.close();
}
@Test
public void deleteANUpdate(){
SqlSession sqlSession=MyBatisUtils.getSqlSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
userMapper.updateUser(new User("1234567","ali","123456"));
userMapper.deleteUser("123456789");
sqlSession.commit();
sqlSession.close();
}
@Test
public void selectLike(){
SqlSession sqlSession=MyBatisUtils.getSqlSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
List<User>userList=userMapper.getUserListByLike("%a%");
for (User user : userList) {
System.out.println(user);
}
sqlSession.close();
}
}
import com.alice.pojo.User;
import com.alice.utils.MyBatisUtils;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import java.util.List;
public class UserDaoTest {
@Test
public void test(){
SqlSession sqlSession= MyBatisUtils.getSqlSession();
UserMapper userMapper =sqlSession.getMapper(UserMapper.class);
List<User>userList= userMapper.getUserList();
for (User user : userList) {
System.out.println(user);
}
sqlSession.close();
}
@Test
public void getUserById(){
SqlSession sqlSession=MyBatisUtils.getSqlSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
User user=userMapper.getUserById("1234567");
System.out.println(user);
sqlSession.close();
}
@Test
public void addUser(){
SqlSession sqlSession=MyBatisUtils.getSqlSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
userMapper.addUser(new User("123456789","9","123456"));
sqlSession.commit();
sqlSession.close();
}
@Test
public void deleteANUpdate(){
SqlSession sqlSession=MyBatisUtils.getSqlSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
userMapper.updateUser(new User("1234567","ali","123456"));
userMapper.deleteUser("123456789");
sqlSession.commit();
sqlSession.close();
}
@Test
public void selectLike(){
SqlSession sqlSession=MyBatisUtils.getSqlSession();
UserMapper userMapper=sqlSession.getMapper(UserMapper.class);
List<User>userList=userMapper.getUserListByLike("%a%");
for (User user : userList) {
System.out.println(user);
}
sqlSession.close();
}
}