今天开始学MyBatis 在网上看了一些简单的demo 官方还提供了中文指南。。可以去下。。
然后自己写了个简单的。。
首先在mysql建名为mybatis的数据库 在数据库中建一个user表 里面有2个字段 id name
下面是目录结构
Configuration.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>
<typeAliases>
<typeAlias alias="User" type="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/mybatis" />
<property name="username" value="root" />
<property name="password" value="55" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="User.xml" />
</mappers>
</configuration>
public class User {
private int id;
private String name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + "]";
}
}
Test.java
import java.io.IOException;
import java.io.Reader;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
public class Test {
public static void main(String[] args) throws IOException {
String resource = "Configuration.xml";
Reader reader = Resources.getResourceAsReader(resource);
SqlSessionFactory sqlMapper = new SqlSessionFactoryBuilder().build(reader);
SqlSession session = sqlMapper.openSession();
try {
User user = (User)session.selectOne("User.selectUser",2);
System.out.println("user name:"+user.getName());
} catch (Exception e) {
e.printStackTrace();
}finally{
session.close();
}
}
}