1.mybatis01：
db.properties：
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/test
username=root
password=root
log4j.properties：
#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.org.apache.ibatis=DEBUG
#log4j.rootLogger=warn,appender1
#log4j.appender.appender1=org.apache.log4j.ConsoleAppender
#log4j.appender.appender1.layout=org.apache.log4j.SimpleLayout
mybatis-config.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> <!-- 加载属性文件 -->
<properties resource="db.properties"/>
<environments default="development">
<environment id="development"> <!-- 使用jdbc中的事务 -->
<transactionManager type="JDBC"></transactionManager>
<!-- 配置数据源 -->
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</dataSource> </environment>
</environments> <mappers>
<mapper resource="cn/zzsxt/entity/TbUser.xml"/>
</mappers>
</configuration>
TbUserDao.java：
package cn.zzsxt.dao;
import java.util.List;
import cn.zzsxt.entity.TbUser;
public interface TbUserDao {
public List<TbUser> findAll();
public TbUser findUserById(Long id);
public int addUser(TbUser user);
public int updateUser(TbUser user);
public int deleteUser(long id);
}
TbUserDaoImpl.java：
package cn.zzsxt.dao.impl; import java.io.InputStream;
import java.util.List; import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder; import cn.zzsxt.dao.TbUserDao;
import cn.zzsxt.entity.TbUser; public class TbUserDaoImpl implements TbUserDao { @Override
public List<TbUser> findAll() {
//加载全局配置文件
InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
//创建SqlSessionFactory
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
//创建SqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//执行查询
List<TbUser> list = sqlSession.selectList("user.findAll");//参数为映射文件中的statment id
//释放资源
sqlSession.close();
return list;
} @Override
public TbUser findUserById(Long id) {
//加载全局配置文件
InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
//创建SqlSessionFactory
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
//创建SqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//执行查询
TbUser user = sqlSession.selectOne("user.findUserById",id);
sqlSession.close();
return user;
} @Override
public int addUser(TbUser user) {
//加载全局配置文件
InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
//创建SqlSessionFactory
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
//创建SqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//执行查询
int count = sqlSession.insert("user.addUser", user);
//提交事务
sqlSession.commit();
// sqlSession.rollback();//回滚事务
sqlSession.close();
return count;
} @Override
public int updateUser(TbUser user) {
//加载全局配置文件
InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
//创建SqlSessionFactory
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
//创建SqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//执行查询
int count = sqlSession.update("user.updateUser", user);
//提交事务
sqlSession.commit();
sqlSession.close();
return count;
} @Override
public int deleteUser(long id) {
//加载全局配置文件
InputStream ips = this.getClass().getResourceAsStream("/mybatis-config.xml");
//创建SqlSessionFactory
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(ips);
//创建SqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//执行查询
int count = sqlSession.update("user.deleteUser", id);
//提交事务
sqlSession.commit();
sqlSession.close();
return count;
} }
TbUser.java：
package cn.zzsxt.entity; import java.io.Serializable;
import java.util.Date; public class TbUser implements Serializable{
private long id;
private String username;
private String sex;
private Date birthday;
private String address; public long getId() {
return id;
}
public void setId(long 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;
}
@Override
public String toString() {
return "TbUser [id=" + id + ", username=" + username + ", sex=" + sex + ", birthday=" + birthday + ", address="
+ address + "]";
} }
TbUser.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">
<!--
1.User.xml(原始ibatis命名)，mapper代理开发的映射文件命名XxxMapper.xml
2.namespace命名空间，作用就是对sql进行分类化管理，理解sql隔离
3.注意:使用mapper代理开发，namespace有特殊的作用
-->
<mapper namespace="user">
<!--在映射文件中配置很多sql语句-->
<!--需求：通过id查询用户表的记录-->
<!--
1.标识映射文件中的sql，将sql语句封装到mapped statement对象中，所以称为statement的id
2.parameterType：指定输入参数类型
3.#{}：表示一个占位符
4.#{id}：其中的id表示接收的输入参数，参数名称就是id，如果输入参数是简单类型，#{}中的参数名可以任意，可以为value或者其他
5.resultType：指定sql输出结果的所映射的java对象类型，select指定resultType表示将单条记录映射成的java对象
-->
<!-- 查询 -->
<select id="findAll" resultType="cn.zzsxt.entity.TbUser">
select * from tb_user
</select> <select id="findUserById" parameterType="java.lang.Long" resultType="cn.zzsxt.entity.TbUser">
select * from tb_user where id=#{id}
</select> <!-- 添加 -->
<insert id="addUser" parameterType="cn.zzsxt.entity.TbUser">
insert into tb_user(username,sex,birthday,address) values(#{username},#{sex},#{birthday},#{address})
</insert> <!-- 修改 -->
<update id="updateUser" parameterType="cn.zzsxt.entity.TbUser">
update tb_user set username=#{username},sex=#{sex},birthday=#{birthday},address=#{address} where id=#{id}
</update> <!-- 删除 -->
<delete id="deleteUser" parameterType="java.lang.Long">
delete from tb_user where id=#{id}
</delete>
</mapper>
Test1.java：
package cn.zzsxt.demo; import java.util.Date;
import java.util.List; import org.junit.Test; import cn.zzsxt.dao.TbUserDao;
import cn.zzsxt.dao.impl.TbUserDaoImpl;
import cn.zzsxt.entity.TbUser; public class Test1 { @Test
public void testFindAll(){
TbUserDao tbUserDao = new TbUserDaoImpl();
List<TbUser> list = tbUserDao.findAll();
for (TbUser tbUser : list) {
System.out.println(tbUser);
}
} @Test
public void testFindUserById(){
TbUserDao tbUserDao = new TbUserDaoImpl();
TbUser user = tbUserDao.findUserById(new Long(1));
System.out.println(user);
} @Test
public void testAddUser(){
TbUserDao tbUserDao = new TbUserDaoImpl();
TbUser user = new TbUser();
user.setUsername("test");
user.setSex("男");
user.setBirthday(new Date());
user.setAddress("北京");
int count = tbUserDao.addUser(user);
System.out.println(count);
} @Test
public void testUpdateUser(){
TbUserDao tbUserDao = new TbUserDaoImpl();
TbUser user = tbUserDao.findUserById(4L);
user.setUsername("王五");
int count =tbUserDao.updateUser(user);
System.out.println(count);
} @Test
public void testDeleteUser(){
TbUserDao tbUserDao = new TbUserDaoImpl();
int count =tbUserDao.deleteUser(4L);
System.out.println(count);
}
}
TestLog4J.java：
package cn.zzsxt.test; import org.apache.log4j.Logger;
import org.junit.Test; public class TestLog4J { Logger logger = Logger.getLogger(TestLog4J.class.getName());
@Test
public void test01(){
// System.out.println("xxxx");
logger.debug("debug....");
logger.info("info....");
logger.warn("warn....");
logger.error("error....");
logger.fatal("fatal....");
} public static void main(String[] args) {
TestLog4J test = new TestLog4J();
test.test01();
} }