mybatis连接数据库的几种方式

1.可以通过配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-4.0.xsd
                        http://www.springframework.org/schema/mvc                            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描 -->
    <context:component-scan base-package="gamedataserver"></context:component-scan>
    <!-- 引入配置文件 -->
    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:jdbc.properties" />
    </bean>  

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${driver}" />
        <property name="url" value="${url}" />
        <property name="username" value="${username}" />
        <property name="password" value="${password}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="${initialSize}"></property>
        <!-- 连接池最大数量 -->
        <property name="maxActive" value="${maxActive}"></property>
        <!-- 连接池最大空闲 -->
        <property name="maxIdle" value="${maxIdle}"></property>
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="${minIdle}"></property>
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="${maxWait}"></property>
    </bean> 

       <bean id="dataSourceEx" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
         <!-- 数据库基本信息配置 -->
         <property name="driverClassName" value="${driver}" />
        <property name="url" value="${urlEx}" />
        <property name="username" value="${usernameEx}" />
        <property name="password" value="${passwordEx}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="${initialSize}"></property>
        <!-- 连接池最大数量 -->
        <property name="maxActive" value="${maxActive}"></property>
        <!-- 连接池最大空闲 -->
        <property name="maxIdle" value="${maxIdle}"></property>
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="${minIdle}"></property>
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="${maxWait}"></property>
    </bean>

    <bean id="dataSourceThree" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
         <!-- 数据库基本信息配置 -->
         <property name="driverClassName" value="${driver}" />
        <property name="url" value="${urlThree}" />
        <property name="username" value="${usernameThree}" />
        <property name="password" value="${passwordThree}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="${initialSize}"></property>
        <!-- 连接池最大数量 -->
        <property name="maxActive" value="${maxActive}"></property>
        <!-- 连接池最大空闲 -->
        <property name="maxIdle" value="${maxIdle}"></property>
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="${minIdle}"></property>
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="${maxWait}"></property>
    </bean>

    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件          第一个数据库链接-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mapping.xml文件 -->
        <property name="mapperLocations" value="classpath:gamedataserver/mapping/one/*.xml"></property>
    </bean>  

      <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件          第二个数据库链接 -->
    <bean id="sqlSessionFactoryEx" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSourceEx" />
        <!-- mapper扫描 -->
         <property name="mapperLocations" value="classpath:gamedataserver/mapping/two/*.xml"></property>
    </bean>

     <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件          第二个数据库链接 -->
    <bean id="sqlSessionFactoryThree" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSourceThree" />
        <!-- mapper扫描 -->
         <property name="mapperLocations" value="classpath:gamedataserver/mapping/three/*.xml"></property>
    </bean>

    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="gamedataserver.dao.one" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>

     <!-- DAOEx接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="gamedataserver.dao.two" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryEx"></property>
    </bean>

    <!-- DAOEx接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="gamedataserver.dao.three" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryThree"></property>
    </bean>

    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->

    <bean name="transactionManagerEx"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSourceEx"></property>
    </bean>
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <bean id="transactionManagerThree"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSourceThree" />
    </bean>

     <!-- 配置自定义Realm -->
    <bean id="myRealm" class="shiro.MyRealm"/>

    <!-- 安全管理器 -->
    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
        <property name="realm" ref="myRealm"/>
    </bean>

    <!-- Shiro过滤器 核心-->
    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
        <!-- Shiro的核心安全接口,这个属性是必须的 -->
        <property name="securityManager" ref="securityManager"/>
        <!-- 身份认证失败，则跳转到登录页面的配置 -->
        <property name="loginUrl" value="/jsp/admin/loginIndex.jsp"/>
        <!-- 权限认证失败，则跳转到指定页面 -->
        <property name="unauthorizedUrl" value="/jsp/admin/nopower.jsp"/>
        <!-- Shiro连接约束配置,即过滤链的定义 -->
        <property name="filterChainDefinitions">
            <value>
                <!--anon 表示匿名访问，不需要认证以及授权-->
                /css/=anon
                /js/=anon
                /fonts/=anon
                /img/=anon
                /loginIndex=anon

                <!--authc表示需要认证 没有进行身份认证是不能进行访问的-->
                /jsp/sysconfig/*=authc,roles[superadmin]
                /jsp/moneyRecord/*=authc
                /jsp/index.jsp=authc,roles[superadmin]
                /jsp/index_player.jsp=authc,roles[admin]
            </value>
        </property>
    </bean>

    <!-- 保证实现了Shiro内部lifecycle函数的bean执行 -->
    <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>

    <!-- 开启Shiro注解 -->
    <bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" depends-on="lifecycleBeanPostProcessor"/>
    <bean class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
        <property name="securityManager" ref="securityManager"/>
    </bean>
</beans>  

这里有三个数据源

2.可以通过注解（不需要mapping.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="mybatis/jdbc.properties"/>
--> 

<typeAliases>
<typeAlias alias="Player" type="gamedataserver.model.Player"/>
<typeAlias alias="ServerConfig" type="gamedataserver.model.ServerConfig"/>
</typeAliases> 

<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<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 class="gamedataserver.dao.one.PlayerMapper"/>
<mapper class="gamedataserver.dao.two.ServerConfigMapper"/>
</mappers>
</configuration>

package gamedataserver.dao.one;

import java.util.List;
import java.util.Map;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import gamedataserver.model.Player;

public interface PlayerMapper {
	@Delete( "DELETE FROM tbl_Player where id=#{id}")
    int deleteByPrimaryKey(Long id);

    int insert(Player record);

    int insertSelective(Player record);
    @Select("SELECT * FROM tbl_Player where id=#{id}")
    Player selectByPrimaryKey(Long id);

    int updateByPrimaryKeySelective(Player record);
    @Update("update tbl_Player set UserName = #{username,jdbcType=VARCHAR} ,UserPass = #{userpass,jdbcType=VARCHAR},"
      +"SessionKey = #{sessionkey,jdbcType=VARCHAR},"
      +"GameMoney = #{gamemoney,jdbcType=BIGINT},"
      +"RealName = #{realname,jdbcType=VARCHAR},"
      +"OpenRoomFreeTimes = #{openroomfreetimes,jdbcType=INTEGER},"
      +"IsMember = #{ismember,jdbcType=INTEGER},"
      +"UnionId = #{unionid,jdbcType=VARCHAR},"
      +"HeadUrl = #{headurl,jdbcType=VARCHAR},"
      +"Sex = #{sex,jdbcType=INTEGER},"
      +"Diamond = #{diamond,jdbcType=INTEGER},"
      +"GoldenFlowerCard = #{goldenflowercard,jdbcType=INTEGER},"
      +"BullCard = #{bullcard,jdbcType=INTEGER},"
      +"MahjongCard = #{mahjongcard,jdbcType=INTEGER},"
      +"LoginTime = #{logintime,jdbcType=BIGINT},"
      +"LogoutTime = #{logouttime,jdbcType=BIGINT},"
      +"CreateTime = #{createtime,jdbcType=BIGINT},"
      +"IsOnLine = #{isonline,jdbcType=INTEGER},"
      +"Version = #{version,jdbcType=VARCHAR} "
      +"where ID = #{id,jdbcType=BIGINT}")
    int updateByPrimaryKey(Player record);
    @Select("SELECT * FROM tbl_Player")
    public List<Player> selectAllPlayer();
    //这个是start limit
    List<Player> selectPlayerByStartLimit(Map params);
    //这个是 where
    int selectPlayerByWhere(Map params);
    @Select("SELECT count(*) FROM tbl_Player where CreateTime>=#{timeStartStamp} and CreateTime<=#{timeEndStamp}")
    int selectPlayerCountByCreateTime(Map<String,Long> map);
}

　

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