Skip to content

Instantly share code, notes, and snippets.

@coolcoolercool

coolcoolercool/src_SqlMapConfig.xml

Created June 21, 2018 06:55
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save coolcoolercool/e7a0eca535cf0a15446783e5a1b31d7c to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save coolcoolercool/e7a0eca535cf0a15446783e5a1b31d7c to your computer and use it in GitHub Desktop.
Download ZIP
mubtis
Raw
src_cn_itheima_dao_UserDao.java
package cn.itheima.dao;
import cn.itheima.pojo.User;
import java.util.List;
/**
* author: zzw5005
* date: 2018/6/20 19:36
*/
public interface UserDao {
public User findUserById(Integer id);
public List<User> findUserByUserName(String userName);
}
Raw
src_cn_itheima_dao_UserDaoImpl.java
package cn.itheima.dao;
import cn.itheima.pojo.User;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import java.util.List;
/**
* author: zzw5005
* date: 2018/6/20 19:37
*/
public class UserDaoImpl implements UserDao {
private SqlSessionFactory sqlSessionFactory;
//通过构造方法注入
public UserDaoImpl(SqlSessionFactory sqlSessionFactory){
this.sqlSessionFactory = sqlSessionFactory;
}
@Override
public User findUserById(Integer id) {
//sqlSession是线程不安全的，所以他的最佳使用范围在方法体内
SqlSession openSession = sqlSessionFactory.openSession();
User user = openSession.selectOne("test.findUserById", id);
return user;
}
@Override
public List<User> findUserByUserName(String userName) {
SqlSession openSession = sqlSessionFactory.openSession();
List<User> list = openSession.selectList("test.findUserByUserName", userName);
return list;
}
}
Raw
src_cn_itheima_mapper_UserMapper.java
package cn.itheima.mapper;
import cn.itheima.pojo.User;
import java.util.List;
/**
* author: zzw5005
* date: 2018/6/20 19:42
*/
public interface UserMapper {
public User findUserById(Integer id);
//动态代理形势中，如果返回结果集List,那么mybatis
//会在生成实现类的使用会自动调用slectList方法
public List<User> findUserByUserName(String userName);
public void insertUser(User user);
}
Raw
src_cn_itheima_mapper_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接口代理实现编写规则:
1. 映射文件中namespace要等于接口的全路径名称
2. 映射文件中sql语句id要等于接口的方法名称
3. 映射文件中传入参数类型要等于接口方法的传入参数类型
4. 映射文件中返回结果集类型要等于接口方法的返回值类型
-->
<mapper namespace="cn.itheima.mapper.UserMapper">
<!--
id:sql语句唯一标识
parameType:指定传入参数类型
resultType:返回结果集类型
#{}占位符:起到占位作用,
如果传入的是基本类型(string,long,double,int,boolean,float等),那么#{}中的变量名称可以随意写.
-->
<select id="findUserById" parameterType="int" resultType="cn.itheima.pojo.User">
select * from user where id =#{id}
</select>
<!--
如果返回结果为集合，可以调用selectList方法，这个方法返回的结果就是一个集合，所以映射文件中应该
配置成集合泛型的类型
${}拼接符:字符串原样拼接，如果传入的参数是基本类型(String,long,double,int ,boolean,float等),
那么${}中的变量名称必须是value
注意:拼接符有sql注入的风险，所以谨慎使用
-->
<select id="findUserByUserName" parameterType="string" resultType="user">
select * from user where username like '%${value}'
</select>
<!--
执行select LAST_INSERT_ID() 数据库函数，返回自增的主键
keyProperty:价格返回的主键放入传入参数的id中保存
order:当前函数相对与insert语句的执行顺序，在insert之前执行的是before，在insert后执行的AFTER
resultType:id的类型，也就是keyproperty中属性的类型
-->
<insert id="insertUser" parameterType="cn.itheima.pojo.User">
<selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
select LAST_INSERT_ID()
</selectKey>
insert into user (username,birthday,sex,address) values(#{username}, #{birthday},#{sex}, #{address})
</insert>
</mapper>
Raw
src_cn_itheima_pojo_User.java
package cn.itheima.pojo;
import java.util.Date;
/**
* author: zzw5005
* date: 2018/6/20 19:33
*/
public class User {
private int id;
private String username; //用户姓名
private String sex; //性别
private Date birthday; //生日
private String address; //地址
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 getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
Raw
src_cn_itheima_test_UserDaoTest.java
package cn.itheima.test;
import cn.itheima.dao.UserDao;
import cn.itheima.dao.UserDaoImpl;
import cn.itheima.pojo.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;
import java.io.InputStream;
import java.util.List;
/**
* author: zzw5005
* date: 2018/6/21 14:33
*/
public class UserDaoTest {
private SqlSessionFactory factory;
//作用:在测试方法前执行这个方法
@Before
public void setUp() throws Exception{
String resource = "SqlMapConfig.xml";
//通过流将核心配置文件读取进来
InputStream inputStream = Resources.getResourceAsStream(resource);
//通过核心配置文件输入流来创建会话工厂
factory = new SqlSessionFactoryBuilder().build(inputStream);
}
@Test
public void testFindUserById() throws Exception{
//将初始化好的工厂注入到实现类中
UserDao userDao = new UserDaoImpl(factory);
User user = userDao.findUserById(1);
System.out.println(user);
}
@Test
public void testFindUserByUserName() throws Exception{
UserDao userDao = new UserDaoImpl(factory);
List<User> list = userDao.findUserByUserName("王");
System.out.println(list);
}
}
Raw
src_cn_itheima_test_UserTest.java
package cn.itheima.test;
import cn.itheima.pojo.User;
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;
import java.io.InputStream;
import java.util.Date;
import java.util.List;
/**
* author: zzw5005
* date: 2018/6/20 21:05
*/
public class UserTest {
@Test
public void testUserById() throws Exception{
String resource = "SqlMapConfig.xml";
//通过流将核心配置文件读取进来
InputStream inputStream = Resources.getResourceAsStream(resource);
//通过核心配置文件输入流来创建会话工厂
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream);
//通过工厂创建会话
SqlSession openSession = factory.openSession();
//第一个参数;所调用的sql语句 = namespace +...+sql的ID
User user = openSession.selectOne("test.findUserById", 1);
System.out.println(user);
openSession.close();
}
@Test
public void testFindUserByUserName() throws Exception{
String resource = "SqlMapConfig.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream);
SqlSession openSession = factory.openSession();
List<User> list = openSession.selectList("test.findUserByUserName", "王");
System.out.println(list);
}
@Test
public void testInsertUser() throws Exception{
String resource = "SqlMapConfig.xml";
//通过流将核心配置文件读取进来
InputStream inputStream = Resources.getResourceAsStream(resource);
//通过核心配置文件输入流来创建会话工厂
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream);
//通过工厂创建会话
SqlSession openSession = factory.openSession();
User user = new User();
user.setUsername("赵四");
user.setBirthday(new Date());
user.setSex("1");
user.setAddress("北京海淀");
System.out.println("=======" + user.getId());
openSession.insert("test.insertUser", user);
//提交事务(mybatis会自动开启事务，但是它不知道何时提交他，所以需要手动提交)
openSession.commit();
System.out.println("=======" + user.getId());
}
@Test
public void testDelUserById() throws Exception{
String resource = "SqlMapConfig.xml";
//通过流将核心配置文件读取进来
InputStream inputStream = Resources.getResourceAsStream(resource);
//通过核心配置文件输入流来创建会话工厂
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream);
//通过工厂创建会话
SqlSession openSession = factory.openSession();
openSession.delete("test.delUserById", 29);
//提交
openSession.commit();
}
@Test
public void testUpdateUserById() throws Exception{
String resource = "SqlMapConfig.xml";
//通过流将核心配置我呢见读取进来
InputStream inputStream = Resources.getResourceAsStream(resource);
//通过核心配置文件输入流来创建会话工厂
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream);
//通过工厂创建会话
SqlSession openSession = factory.openSession();
User user = new User();
user.setId(27);
user.setUsername("王麻子");
openSession.update("test.updateUserById", user);
//提交
openSession.commit();
}
}
Raw
src_db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root
Raw
src_log4j.properties
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
Raw
src_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>
<typeAliases>
<!-- 定义单个pojo类别名
type:类的全路劲名称
alias:别名
-->
<!--<typeAlias type="cn.itheima.pojo.User" alias="user"/> -->
<!-- 使用包扫描的方式批量定义别名
定以后别名等于类名,不区分大小写,但是建议按照java命名规则来,首字母小写,以后每个单词的首字母大写
-->
<package name="cn.itheima.pojo"/>
</typeAliases>
<!-- 和spring整合后 environments配置将废除-->
<environments default="development">
<environment id="development">
<!-- 使用jdbc事务管理-->
<transactionManager type="JDBC" />
<!-- 数据库连接池-->
<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>
<mapper resource="User.xml"/>
<!--
使用class属性引入接口的全路径名称:
使用规则:
1. 接口的名称和映射文件名称除扩展名外要完全相同
2. 接口和映射文件要放在同一个目录下
-->
<!-- <mapper class="cn.itheima.mapper.UserMapper"/> -->
<!-- 使用包扫描的方式批量引入Mapper接口
使用规则:
1. 接口的名称和映射文件名称除扩展名外要完全相同
2. 接口和映射文件要放在同一个目录下
-->
<package name="cn.itheima.mapper"/>
</mappers>
</configuration>
Raw
src_User.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">
<!--namespace:命名空间,做sql隔离-->
<mapper namespace="test">
<!--
id:sql语句唯一标识
parameterType:指定传入参数类型
resultType:返回结果集类型
#{}占位符:起到占位作用,如果传入的是基本类型(string,long,double,int,boolean,float等),那么#{}中的变量名称可以随意写.
-->
<select id="findUserById" parameterType="java.lang.Integer" resultType="cn.itheima.pojo.User">
select * from user where id=#{id}
</select>
<!--
如果返回结果为集合,可以调用selectList方法,这个方法返回的结果就是一个集合,所以映射文件中应该配置成集合泛型的类型
${}拼接符:字符串原样拼接,如果传入的参数是基本类型(string,long,double,int,boolean,float等),那么${}中的变量名称必须是value
注意:拼接符有sql注入的风险,所以慎重使用
-->
<select id="findUserByUserName" parameterType="java.lang.String" resultType="cn.itheima.pojo.User">
select * from user where username like '%${value}%'
</select>
<!--
#{}:如果传入的是pojo类型,那么#{}中的变量名称必须是pojo中对应的属性.属性.属性.....
如果要返回数据库自增主键:可以使用select LAST_INSERT_ID()
-->
<insert id="insertUser" parameterType="cn.itheima.pojo.User" >
<!-- 执行 select LAST_INSERT_ID()数据库函数,返回自增的主键
keyProperty:将返回的主键放入传入参数的Id中保存.
order:当前函数相对于insert语句的执行顺序,在insert前执行是before,在insert后执行是AFTER
resultType:id的类型,也就是keyproperties中属性的类型
-->
<selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
select LAST_INSERT_ID()
</selectKey>
insert into user (username,birthday,sex,address) values(#{username},#{birthday},#{sex},#{address})
</insert>
<delete id="delUserById" parameterType="int">
delete from user where id=#{id}
</delete>
<update id="updateUserById" parameterType="cn.itheima.pojo.User">
update user set username=#{username} where id=#{id}
</update>
</mapper>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment