spring整合mybatis的简单配置

使用mapper接口的方式整合mybatis

1：创建UserMapper.java的接口

2：在资源文件中创建UserMapper.xml对应上面接口的映射文件，（文件名要和接口名相同）

3：在配置文件SqlMapConfig.xml中引用UserMapper.xml

4:配置applicationContext的文件

5：web.xml中加载applicationContext文件

web.xml中的配置：

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app>  <display-name>Archetype Created Web Application</display-name>  <context-param>      <param-name>contextConfigLocation</param-name>      <param-value>classpath:spring/application*.xml</param-value>  </context-param>    <listener>    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <servlet>     <servlet-name>mvc</servlet-name>     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>     <init-param>         <param-name>contextConfigLocation</param-name>         <param-value>classpath:spring/mvc-servlet.xml</param-value>     </init-param>     <load-on-startup>1</load-on-startup> </servlet>    <servlet-mapping>        <servlet-name>mvc</servlet-name>        <url-pattern>*.do</url-pattern>    </servlet-mapping><welcome-file-list>    <welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

applicationContext-dao.xml的配置：

<beans xmlns="http://www.springframework.org/schema/beans"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"   xmlns:context="http://www.springframework.org/schema/context"   xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"   xsi:schemaLocation="http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans-3.2.xsd       http://www.springframework.org/schema/mvc       http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd       http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context-3.2.xsd       http://www.springframework.org/schema/aop       http://www.springframework.org/schema/aop/spring-aop-3.2.xsd       http://www.springframework.org/schema/tx       http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">   <context:property-placeholder location="classpath:db.properties" />   <!-- 閰嶇疆鏁版嵁婧�-->   <!--<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">-->      <!--<property name="driverClass" value="${db.driver}" />-->      <!--<property name="jdbcUrl" value="${db.url}" />-->      <!--<property name="user" value="${db.username}" />-->      <!--<property name="password" value="${db.password}" />-->      <!--<property name="maxPoolSize" value="10" />-->      <!--<property name="minPoolSize" value="5" />-->   <!--</bean>-->   <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">      <property name="driverClassName" value="com.mysql.jdbc.Driver" />      <property name="url" value="jdbc:mysql://localhost:3306/mybatis" />      <property name="username" value="root" />      <property name="password" value="root" />      <property name="maxActive" value="10" />      <property name="maxIdle" value="5" />   </bean>   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">      <property name="configLocation" value="classpath:config/SqlMapConfig.xml"/>      <property name="dataSource" ref="dataSource"></property>   </bean>   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">      <property name="basePackage" value="com.feitian.web.mapper"></property>      <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>   </bean></beans>

applicationContext-service.xml的配置

<beans xmlns="http://www.springframework.org/schema/beans"      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"      xmlns:context="http://www.springframework.org/schema/context"      xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"      xsi:schemaLocation="http://www.springframework.org/schema/beans      http://www.springframework.org/schema/beans/spring-beans-3.2.xsd      http://www.springframework.org/schema/mvc      http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd      http://www.springframework.org/schema/context      http://www.springframework.org/schema/context/spring-context-3.2.xsd      http://www.springframework.org/schema/aop      http://www.springframework.org/schema/aop/spring-aop-3.2.xsd      http://www.springframework.org/schema/tx      http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">   <!-- 閰嶇疆service鐨刡ean锛屼娇鐢ㄦ壂鎻忓櫒 -->   <context:component-scan base-package="com.taotao.web"></context:component-scan>   <!-- 閰嶇疆浜嬪姟绠＄悊鍣�-->   <bean id="transactionManager"        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">      <!-- 鏁版嵁婧�-->      <property name="dataSource" ref="dataSource"></property>   </bean>   <!-- 閰嶇疆閫氱煡 -->   <tx:advice id="txAdvice" transaction-manager="transactionManager">      <tx:attributes>         <!-- 閰嶇疆浜嬪姟鐨勪紶鎾壒鎬�-->         <tx:method name="save*" propagation="REQUIRED" />         <tx:method name="add*" propagation="REQUIRED" />         <tx:method name="insert*" propagation="REQUIRED" />         <tx:method name="delete*" propagation="REQUIRED" />         <tx:method name="del*" propagation="REQUIRED" />         <tx:method name="remove*" propagation="REQUIRED" />         <tx:method name="update*" propagation="REQUIRED" />         <tx:method name="modify*" propagation="REQUIRED" />         <tx:method name="find*" read-only="true" />         <tx:method name="query*" read-only="true" />         <tx:method name="select*" read-only="true" />         <tx:method name="get*" read-only="true" />      </tx:attributes>   </tx:advice>   <!-- 閰嶇疆aop -->   <aop:config>      <aop:advisor advice-ref="txAdvice"                pointcut="execution(* com.feitian.web.service.*.*(..))" />   </aop:config></beans>

SqlMapConfig.xml配置：

<?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 type="com.feitian.web.po.User" alias="User"/>    </typeAliases>    <mappers>       <mapper resource="config/sqlMap/UserMapper.xml"/>    </mappers>              </configuration>

UserMapper.xml配置：

<?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.feitian.web.mapper.UserMapper">    <select id="findUserById" parameterType="int" resultType="java.lang.String">        SELECT        username FROM tb_user WHERE id = #{id}    </select></mapper>

UserMapper.java接口：

package com.feitian.web.mapper;public interface UserMapper {    String findUserById( int id);}

mvc_servlet.xml配置;

<?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.xsd        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">       <!-- 注解驱动 -->       <mvc:annotation-driven />       <context:component-scan base-package="com.feitian.web.controller" />       <bean               class="org.springframework.web.servlet.view.InternalResourceViewResolver">              <property name="prefix" value="/WEB-INF/views/" />              <property name="suffix" value=".jsp" />       </bean></beans>

以上配置可以正确运行

在配置过程中出现了下面的错误：

Mapped Statements collection does not contain value for com.feitianweb.mappe

经排查是userMapper.xml配置文件没有找到，除此之外还有几个注意点也会引起上面的错误：

1、mapper.xml中没有加入namespace 
2、mapper.xml中的方法和接口mapper的方法不对应 
3、mapper.xml没有加入到SqlMapConfig.xml中(即总的配置文件)，例外：配置了mapper文件的包路径的除外 
(或者：由于包的层级太多，跟SqlMapConfig.xml配置的内容不一致，导致无法识别)
4、mapper.xml文件名和所写的mapper名称不相同。