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本文主要演示通过jndi配置数据源,通过spring-javaconfig的方式配置mybatis,连接mysql数据源
主要看代码
1,maven工程中添加依赖
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.30</version>
</dependency>
2,DataSourceConfig
package com.halfworlders.idat.config;
import javax.sql.DataSource;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.jndi.JndiObjectFactoryBean;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class DataSourceConfig extends WebMvcConfigurerAdapter {
@Bean
public JndiObjectFactoryBean dataSource() {
JndiObjectFactoryBean jndiObjectFB = new JndiObjectFactoryBean();
jndiObjectFB.setJndiName("jndi/mybatis");
jndiObjectFB.setResourceRef(true);
jndiObjectFB.setProxyInterface(javax.sql.DataSource.class);
return jndiObjectFB;
}
@Bean
public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) throws Exception {
SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
return sessionFactory;
}
@Bean
public MapperScannerConfigurer mapperScannerConfigurer(){
MapperScannerConfigurer mScannerConfigurer = new MapperScannerConfigurer();
mScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactory");
mScannerConfigurer.setBasePackage("com.halfworlders.idat.dao");
return mScannerConfigurer;
}
@Bean
public DataSourceTransactionManager transactionManager(DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
}
}
3,Tomcat中配置jndi/mybatis
在\apache-tomcat-7.0.79\conf\context.xml里面添加配置如下
<?xml version='1.0' encoding='utf-8'?>
<Context>
<Resource name="jndi/mybatis"
auth="Container"
type="javax.sql.DataSource"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://****/**db"
username="****"
password="****"
maxActive="20"
maxIdle="10"
maxWait="10000"/>
</Context>
apache-tomcat-7.0.79\lib目录添加
mysql-connector-java-5.1.30.jar文件
4,com.halfworlders.idat.dao包内创建UserMapper接口
package com.halfworlders.idat.dao;
import com.halfworlders.idat.domain.User;
public interface UserMapper {
User selectByPrimaryKey(String userId);
}
5,classpath:mapper目录里创建UserMapper.xml映射文件
<?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.halfworlders.idat.dao.UserMapper" >
<resultMap id="BaseResultMap" type="com.halfworlders.idat.domain.User" >
<id column="user_id" property="userId" jdbcType="CHAR" />
<result column="user_name" property="userName" jdbcType="VARCHAR" />
<result column="user_birthday" property="userBirthday" jdbcType="DATE" />
<result column="user_salary" property="userSalary" jdbcType="DOUBLE" />
</resultMap>
<sql id="Base_Column_List" >
user_id, user_name, user_birthday, user_salary
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" >
select
<include refid="Base_Column_List" />
from t_user
where user_id = #{userId,jdbcType=CHAR}
</select>
</mapper>
以上步骤即是实现了mybatis访问mysql数据