Mybatis框架配置收录(详解版)
MybatisUtils详细配置说明
java
package com.lanyy.utils;
//import javax.annotation.Resource;
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;
// 第一步创建工具类 sqlSessionFactory 工厂类是来构建 sqlSession
public class MybatisUtils {
private static SqlSessionFactory sqlSessionFactory;
static {
try {
// 第二步去resources 目录下写配置文件mybatis-config.xml
String resource = "mybatis-config.xml";
// 构建sqlSessionFactory对象,并引入mybatis配置文件
InputStream inputStream = Resources.getResourceAsStream(resource);
// 通过SqlSessionFactoryBuilder方法生成sqlSessionFactory对象
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
} catch (IOException e)
// 使用mybatis必须完成的一步,加载配置文件,获取sqlSessionFactory对象
// String resource = "mybatis-config.xml";
// InputStream input = Resource.getResourceAsStream(resource);
// sqlSessionFactory sqlsession= new SqlSessionFactoryBuilder().build(input);
{
e.printStackTrace();
}
}
// 获取sqlSession对象连接
public static SqlSession getSqlSession() {
return sqlSessionFactory.openSession();
}
}
MybatisUtils简化配置说明
java
package com.lanyy.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;
//sqlSessionFactory --> sqlSession
public class MybatisUtils {
private static SqlSessionFactory sqlSessionFactory;
static{
try {
//使用Mybatis第一步:获取sqlSessionFactory对象
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(true);
}
}
MybatisUtils自动提交数据库增删改事务配置
java
package com.lanyy.utils;
//import javax.annotation.Resource;
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;
// 第一步 实例化创建工具类 sqlSessionFactory 工厂类构造器
// 生成配置文件流XMLConfigBuilder传递所有配置信息至Configuration
// 经executor执行器创建 sqlSession
public class MybatisUtils {
private static SqlSessionFactory sqlSessionFactory;
static {
try {
// 第二步去resources 目录下写配置文件mybatis-config.xml
String resource = "mybatis-config.xml";
// 构建sqlSessionFactory对象,并引入mybatis配置文件
InputStream inputStream = Resources.getResourceAsStream(resource);
// 通过SqlSessionFactoryBuilder方法生成sqlSessionFactory实例化对象
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
} catch (IOException e)
// 使用mybatis必须完成的一步,加载配置文件,获取sqlSessionFactory对象
// String resource = "mybatis-config.xml";
// InputStream input = Resource.getResourceAsStream(resource);
// sqlSessionFactory sqlsession= new SqlSessionFactoryBuilder().build(input);
{
e.printStackTrace();
}
}
// 获取sqlSession对象连接
// 设置自动提交事务功能()内改为true,默认为false空白()
public static SqlSession getSqlSession() {
return sqlSessionFactory.openSession(true);
}
}
db.properties配置详情
java
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8
username=root
pwd=root
mybatis-config.xml配置详情
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核心配置文件-->
<configuration>
<!--引入外部配置文件-->
<properties resource="db.properties"/>
<settings>
<!--标准的日志工厂实现-->
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!--可以给实体类起别名-->
<typeAliases>
<package name="com.lanyy.pojo"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${pwd}"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper class="com.lanyy.dao.TeacherMapper"/>
<mapper class="com.lanyy.dao.StudentMapper"/>
</mappers>
</configuration>
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