<?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>
<settings>
<!-- <setting name="logImpl" value="STDOUT_LOGGING"/>-->
<setting name="logImpl" value="LOG4J"/>
</settings>
<typeAliases>
<typeAlias type="com.mybatis.pojo.User" alias="User" />
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/security?useUnicode=true&characterEncoding=utf8&useSSL=true"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/mybatis/dao/UserMapper.xml"/>
</mappers>
</configuration>
package com.mybatis.utils;
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 java.io.IOException;
import java.io.InputStream;
public class T {
private static SqlSessionFactory sqlSessionFactory;
static {
{
try {
String resource = "mybatis-config.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static SqlSession getSqlSession(){
return sqlSessionFactory.openSession();
}
}
package com.mybatis.pojo;
public class User {
private int id;
private String username;
private String password;
public User() {
}
public User(String username, String password) {
this.username = username;
this.password = password;
}
public User(int id, String username, String password) {
this.id = id;
this.username = username;
this.password = password;
}
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 String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
}
<?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.mybatis.dao.UserDao">
<select id="getUserList" resultType="User" >
select * from users ;
</select>
<select id="getUserById" resultType="com.mybatis.pojo.User" parameterType="int">
select * from users where id=#{id};
</select>
<insert id="addUser" parameterType="com.mybatis.pojo.User">
insert into users (username,password) values (#{username},#{password});
</insert>
<update id="updateUser" parameterType="com.mybatis.pojo.User">
update users set username=#{username},password=#{password} where id=#{id};
</update>
<delete id="deleteUser" parameterType="int">
delete from users where id =#{id};
</delete>
<select id="getUserLimit" parameterType="map" resultType="com.mybatis.pojo.User">
select * from users limit #{startIndex},#{pageSize} ;
</select>
</mapper>
package com.mybatis.dao;
import com.mybatis.pojo.User;
import java.util.List;
import java.util.Map;
public interface UserDao {
List<User> getUserList();
User getUserById(int id);
int addUser(User user);
boolean updateUser(User user);
int deleteUser(int id);
List<User> getUserLimit(Map<String,Integer> map);
}
package com.mybatis.dao;
import com.mybatis.pojo.User;
import org.junit.Test;
import com.mybatis.utils.T;
import org.apache.ibatis.session.SqlSession;
import java.util.HashMap;
import java.util.List;
public class UserdaoTest {
@Test
public void testSelect(){
SqlSession sqlSession = T.getSqlSession();
UserDao userDao = sqlSession.getMapper(UserDao.class);
List<User> userList = userDao.getUserList();
for (User user : userList) {
System.out.println(user);
}
sqlSession.close();
}
@Test
public void testByid(){
SqlSession sqlSession = T.getSqlSession();
UserDao userDao = sqlSession.getMapper(UserDao.class);
User user = userDao.getUserById(2);
System.out.println(user);
sqlSession.close();
}
@Test
public void testInsert(){
SqlSession sqlSession = T.getSqlSession();
UserDao userDao = sqlSession.getMapper(UserDao.class);
userDao.addUser(new User("肖2萧然","211111"));
sqlSession.commit();
sqlSession.close();
}
@Test
public void testUpdate(){
SqlSession sqlSession = T.getSqlSession();
UserDao userDao = sqlSession.getMapper(UserDao.class);
userDao.updateUser(new User(1,"肖2萧然","211111"));
sqlSession.commit();
sqlSession.close();
}
@Test
public void testdel(){
SqlSession sqlSession = T.getSqlSession();
UserDao userDao = sqlSession.getMapper(UserDao.class);
userDao.deleteUser(103);
sqlSession.commit();
sqlSession.close();
}
@Test
public void testlimit(){
SqlSession sqlSession = T.getSqlSession();
UserDao userDao = sqlSession.getMapper(UserDao.class);
HashMap<String, Integer> map = new HashMap<String, Integer>();
map.put("startIndex",0);
map.put("pageSize",2);
List<User> userList = userDao.getUserLimit(map);
for (User user : userList) {
System.out.println(user.toString());
}
sqlSession.close();
}
}