首页 > 代码库 > mybatis学习笔记（五） -- maven+spring+mybatis从零开始搭建整合详细过程（附demo和搭建过程遇到的问题解决方法）

mybatis学习笔记（五） -- maven+spring+mybatis从零开始搭建整合详细过程（附demo和搭建过程遇到的问题解决方法）

2024-10-18 08:25:01   213人阅读

文章介绍结构一览

一、使用maven创建web项目

1、新建maven项目

2、修改jre版本

3、修改Project Facts，生成WebContent文件夾

4、将WebContent下的两个文件复制到src/main/webapp下，删掉WebContent

5、修改Deployment Assembly

6、测试

二、mybatis访问mysql

1、数据库准备

2、修改pom.xml

3、创建实体类

4、创建访问接口

5、添加映射文件

6、添加MyBatisCfg.xml配置文件，注册mapper，实体类别名

7、添加MyBatisUtil工具类

8、创建Impl类继承接口

9、测试

10、添加log4j2配置（控制台看到向数据库发送的SQL请求，及数据库向程序响应）

三、Spring与Mybatis初级整合

1、修改pom.xml

2、添加ApplicationContext.xml，修改MyBatisCfg.xml

3、测试

四、Spring与Mybatis整合升级 

1、修改ApplicationContext.xml，引入自动扫描，弃用MyBasticCfg.xml

2、修改测试类，测试

Demo下载：spring_mybatis_1.rar

项目结构如下：

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正式开始！！！

一、使用maven创建web项目

1、新建项目

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填写完成后，创建成功。

 

2、修改jre版本

properties->java build path，把默认的1.5版本remove，

然后Add Library-> JRE Library System->选择 Workspace default JRE

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选择完成后，可以在Library列表看到这个

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3、修改Project Facts

properties->Project Facts，修改java版本，然后把Dynamic Web Module前面打上勾

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Apply后，查看项目结构可以看到多了个WebContent

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4、将WebContent下的两个文件复制到src/main/webapp下，然后将WebContent整个删掉

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5、修改Deployment Assembly，只留下下面几个

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新增/src/main/webapp，步骤Add->Floder->src->main->webapp->finish

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6、测试，在src/main/webapp下，新建一个index.jsp文件

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>hello</body></html>

运行tomcat，访问：http://localhost:8888/spring_mybatis_1/，页面显示“hello”

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二、mybatis访问mysql

1、数据库准备，新建数据表tb_book，添加测试数据

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2、修改pom.xml文件，新增下面代码

<dependencies>    <dependency>        <groupId>mysql</groupId>        <artifactId>mysql-connector-java</artifactId>        <version>5.1.38</version>    </dependency>    <dependency>        <groupId>org.apache.logging.log4j</groupId>        <artifactId>log4j-core</artifactId>        <version>2.6.1</version>    </dependency>    <dependency>        <groupId>org.mybatis</groupId>        <artifactId>mybatis</artifactId>        <version>3.4.1</version>    </dependency>    <dependency>        <groupId>junit</groupId>        <artifactId>junit</artifactId>        <version>4.10</version>    </dependency></dependencies>

完整pom.xml文件，

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.lmei</groupId>    <artifactId>spring_mybatis_1</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>war</packaging>    <dependencies>        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.38</version>        </dependency>        <dependency>            <groupId>org.apache.logging.log4j</groupId>            <artifactId>log4j-core</artifactId>            <version>2.6.1</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.4.1</version>        </dependency>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.10</version>        </dependency>    </dependencies></project>
pom.xml

 

3、创建实体类，Book(id,bookName)

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package com.lmei.entity;public class Book {    private int id;    private String bookName;    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getBookName() {        return bookName;    }    public void setTypeName(String bookName) {        this.bookName = bookName;    }}
Book.java

 

4、创建访问接口

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package com.lmei.dao;import java.util.List;import com.lmei.entity.*;public interface BookDaoI {    public List<Book> getAllBook();}

 

5、添加映射文件

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<?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.lmei.dao.BookDaoI">    <select id="getAllBook" parameterType="int" resultType="Book">        select * from tb_book     </select></mapper>

 

6、新建MyBatisCfg.xml文件，用于配置MyBatis运行环境

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新增db.properties

driver=com.mysql.jdbc.Driverurl=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNullusername=rootpassword=123456

新增MyBatisCfg.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>    <!-- 指定数据库连接信息的位置 -->    <properties resource="db.properties"></properties>        <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="${username}" />                <property name="password" value="${password}" />            </dataSource>        </environment>    </environments></configuration>

在MyBatisCfg.xml加入“com.lmei.entity"别名配置，注册mapper

<?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>    <!-- 指定数据库连接信息的位置 -->    <properties resource="db.properties"></properties>        <!--com.lmei.entity下的所有类定义别名 -->    <typeAliases>        <package name="com.lmei.entity"/>    </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="${username}" />                <property name="password" value="${password}" />            </dataSource>        </environment>    </environments>    <mappers>        <!--注册BookMapper映射-->        <mapper resource="com/lmei/mapper/BookMapper.xml" />    </mappers></configuration>

注：关于实体类别名可参考：mybatis学习笔记(四）-- 为实体类定义别名两种方法（基于xml映射）

 

7、新增MyBatisUtil工具类

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package com.lmei.util;import java.io.InputStream;import org.apache.ibatis.session.SqlSession;import org.apache.ibatis.session.SqlSessionFactory;import org.apache.ibatis.session.SqlSessionFactoryBuilder;public class MyBatisUtil {    /**     * 获取SqlSessionFactory     * @return SqlSessionFactory     */    public static SqlSessionFactory getSqlSessionFactory() {        String resource = "MyBatisCfg.xml";        InputStream is = MyBatisUtil.class.getClassLoader().getResourceAsStream(resource);        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);        return factory;    }        /**     * 获取SqlSession     * @return SqlSession     */    public static SqlSession getSqlSession() {        return getSqlSessionFactory().openSession();    }        /**     * 获取SqlSession     * @param isAutoCommit      *         true 表示创建的SqlSession对象在执行完SQL之后会自动提交事务     *         false 表示创建的SqlSession对象在执行完SQL之后不会自动提交事务，这时就需要我们手动调用sqlSession.commit()提交事务     * @return SqlSession     */    public static SqlSession getSqlSession(boolean isAutoCommit) {        return getSqlSessionFactory().openSession(isAutoCommit);    }}

 

8、创建Impl类实现接口

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新建BookImpl类，继承BookDaoI接口

package com.lmei.dao.impl;import java.util.List;import org.apache.ibatis.session.SqlSession;import com.lmei.entity.*;import com.lmei.util.MyBatisUtil;import com.lmei.dao.*;;public class BookImpl implements BookDaoI {    @Override    public List<Book> getAllBook() {        //获得会话对象        SqlSession session= MyBatisUtil.getSqlSession(true);         try {                      BookDaoI bookDao = session.getMapper(BookDaoI.class);            return bookDao.getAllBook();        } finally {            session.close();        }    }}

 

9、测试

添加测试类TestBookImpl.java

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package com.lmei.test;import static org.junit.Assert.*;import java.util.List;import org.junit.BeforeClass;import org.junit.Test;import com.lmei.dao.impl.*;import com.lmei.entity.*;import com.lmei.dao.*;public class TestBookImpl {    static BookDaoI bookDao;    @BeforeClass    public static void beforeClass()    {        bookDao = new BookImpl();    }        @Test    public void testGetAllBookTypes() {        List<Book> books = bookDao.getAllBook();        for (Book book : books) {            System.out.println(book.getBookName());        }        assertNotNull(books);    }}

项目右键->Run As->JUnit Test，控制台输出

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输出成，但 出现错误：“ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.”

新增log4j2.xml配置文件，文件位置如下：

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<?xml version="1.0" encoding="UTF-8"?><Configuration status="off" monitorInterval="1800">        <Appenders>        <Console name="Console" target="SYSTEM_OUT">            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />        </Console>            </Appenders>    <Loggers>                    <Root level="debug">            <AppenderRef ref="Console" />        </Root>    </Loggers></Configuration>
log4j2.xml

添加完成后，重新运行，可以在控制台看到向数据库发送的SQL请求，及数据库向程序响应的结果

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但还有一个警告！

“Description Resource Path Location Type

No grammar constraints (DTD or XML schema) detected for the document. log4j2.xml /spring_mybatis_1/src/main/resources line 1 XML Problem”

修改log4j2.xml如下，即可

<?xml version="1.0" encoding="UTF-8" standalone="no"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/2002/xmlspec/dtd/2.10/xmlspec.dtd"><Configuration status="off" monitorInterval="1800">        <Appenders>        <Console name="Console" target="SYSTEM_OUT">            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />        </Console>            </Appenders>    <Loggers>                    <Root level="debug">            <AppenderRef ref="Console" />        </Root>    </Loggers></Configuration>

 

三、Spring与MyBatis初级整合

1、修改pom.xml文件，新增下面这些包

<!-- 添加Spring-core包 --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-core</artifactId>    <version>4.1.4.RELEASE</version></dependency><!-- 添加spring-context包 --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-context</artifactId>    <version>4.1.4.RELEASE</version></dependency><!-- 添加spring-tx包 --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-tx</artifactId>    <version>4.1.4.RELEASE</version></dependency><!-- 添加spring-jdbc包 --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-jdbc</artifactId>    <version>4.1.4.RELEASE</version></dependency><!-- 为了方便进行单元测试，添加spring-test包 --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-test</artifactId>    <version>4.1.4.RELEASE</version></dependency><!--添加spring-web包 --><dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-web</artifactId>    <version>4.1.4.RELEASE</version></dependency><!--添加aspectjweaver包 --><dependency>    <groupId>org.aspectj</groupId>    <artifactId>aspectjweaver</artifactId>    <version>1.8.5</version></dependency><!-- 添加mybatis与Spring整合的核心包 --><dependency>    <groupId>org.mybatis</groupId>    <artifactId>mybatis-spring</artifactId>    <version>1.3.0</version></dependency>

完整pom.xml

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.lmei</groupId>    <artifactId>spring_mybatis_1</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>war</packaging>    <dependencies>        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.38</version>        </dependency>        <dependency>            <groupId>org.apache.logging.log4j</groupId>            <artifactId>log4j-core</artifactId>            <version>2.6.1</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.4.1</version>        </dependency>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.10</version>        </dependency>                <!-- 添加Spring-core包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- 添加spring-context包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- 添加spring-tx包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-tx</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- 添加spring-jdbc包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!-- 为了方便进行单元测试，添加spring-test包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-test</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!--添加spring-web包 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>4.1.4.RELEASE</version>        </dependency>        <!--添加aspectjweaver包 -->        <dependency>            <groupId>org.aspectj</groupId>            <artifactId>aspectjweaver</artifactId>            <version>1.8.5</version>        </dependency>        <!-- 添加mybatis与Spring整合的核心包 -->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis-spring</artifactId>            <version>1.3.0</version>        </dependency>                   </dependencies></project>
pom.xml

 

初次配置时，运行测试，报错“java.lang.AbstractMethodError: org.mybatis.spring.transaction.SpringManagedTransaction.getTimeout()Ljava/lang/Integer;”

完整的错误信息：

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java.lang.AbstractMethodError: org.mybatis.spring.transaction.SpringManagedTransaction.getTimeout()Ljava/lang/Integer;    at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:85)    at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)    at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)    at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:606)    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358)    at com.sun.proxy.$Proxy7.selectList(Unknown Source)    at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:198)    at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:137)    at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75)    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)    at com.sun.proxy.$Proxy8.getAllBook(Unknown Source)    at com.lmei.test.TestMyBatisSpring.test(TestMyBatisSpring.java:22)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:606)    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
错误信息

一开始的mybatis-spring配置的版本是1.2.2，发生版本不兼容的问题，将其改为1.3.0就没问题了，上面pom.xml配置信息是1.3.0

 

2、添加ApplicationContext.xml配置

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<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context-4.3.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">    <!-- 引入db.properties属性文件 -->    <context:property-placeholder location="classpath:db.properties" />    <!--定义一个jdbc数据源，创建一个驱动管理数据源的bean -->    <bean id="jdbcDataSource"        class="org.springframework.jdbc.datasource.DriverManagerDataSource">        <property name="driverClassName" value="${driver}" />        <property name="url" value="${url}" />        <property name="username" value="${username}" />        <property name="password" value="${password}" />    </bean>    <!--创建一个sql会话工厂bean，指定数据源 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="jdbcDataSource" /><!-- 指定数据源 -->        <property name="configLocation" value="classpath:MyBatisCfg.xml"></property> <!-- 指定配置文件 -->    </bean>    <!--创建一个bookDao -->    <bean id="bookDao" class="org.mybatis.spring.mapper.MapperFactoryBean">        <!--指定映射文件 -->        <property name="mapperInterface" value="com.lmei.dao.BookDaoI"></property>        <!-- 指定sql会话工厂 -->        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>    </bean></beans>

测试时报错“java.sql.SQLException: Access denied for user ‘USER‘@‘localhost‘ (using password: YES)”

出错在这句配置： <property name="username" value="http://www.mamicode.com/${username}" />

发生属性冲突，将配置文件里的username换成其他的名字即可, 如jdbc.username

原因: （参考来自http://blog.csdn.net/hy245120020/article/details/51821950）

username在windows下默认取值为电脑的账号，一般电脑账号为administrator，

如果你的电脑账号是自己设置的那就为你设置的账号，数据库连接时数据库中没有administrator用户或者跟你电脑账号一样名字的用户，就会报错。

一般为了避免和Windows基本配置冲突，数据库连接名常常写的较长如{jdbc.username}这样就可以唯一识别用户名而不会和Windows冲突。

 

将db.properties文件中的进行修改，如下（其他并不会冲突，但为了统一都改了）

jdbc.driver=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNulljdbc.username=rootjdbc.password=123456

将上面的ApplicationContext.xml进行修改

<bean id="jdbcDataSource"        class="org.springframework.jdbc.datasource.DriverManagerDataSource">    <property name="driverClassName" value="${jdbc.driver}" />    <property name="url" value="${jdbc.url}" />    <property name="username" value="${jdbc.username}" />    <property name="password" value="${jdbc.password}" />
 </bean>

修改后的完整ApplicationContext.xml

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<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context-4.3.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">    <!-- 引入db.properties属性文件 -->    <context:property-placeholder location="classpath:db.properties" />    <!--定义一个jdbc数据源，创建一个驱动管理数据源的bean -->    <bean id="jdbcDataSource"        class="org.springframework.jdbc.datasource.DriverManagerDataSource">        <property name="driverClassName" value="${jdbc.driver}" />        <property name="url" value="${jdbc.url}" />        <property name="username" value="${jdbc.username}" />        <property name="password" value="${jdbc.password}" />    </bean>    <!--创建一个sql会话工厂bean，指定数据源 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="jdbcDataSource" /><!-- 指定数据源 -->        <property name="configLocation" value="classpath:MyBatisCfg.xml"></property> <!-- 指定配置文件 -->    </bean>    <!--创建一个bookDao -->    <bean id="bookDao" class="org.mybatis.spring.mapper.MapperFactoryBean">        <!--指定映射文件 -->        <property name="mapperInterface" value="com.lmei.dao.BookDaoI"></property>        <!-- 指定sql会话工厂 -->        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>    </bean></beans>
ApplicationContext.xml

 

MyBatisCfg.xml中连接数据库部分可以删除

<?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>    <!-- 指定数据库连接信息的位置 -->    <properties resource="db.properties"></properties>        <!--com.lmei.entity下的所有类定义别名 -->    <typeAliases>        <package name="com.lmei.entity"/>    </typeAliases>        <!-- <environments default="development">        <environment id="development">            <transactionManager type="JDBC" />            <dataSource type="POOLED">                <property name="driver" value="http://www.mamicode.com/${jdbc.driver}" />                <property name="url" value="http://www.mamicode.com/${jdbc.url}" />                <property name="username" value="http://www.mamicode.com/${jdbc.username}" />                <property name="password" value="http://www.mamicode.com/${jdbc.password}" />            </dataSource>        </environment>    </environments> -->    <mappers>        <!--注册BookMapper映射-->        <mapper resource="com/lmei/mapper/BookMapper.xml" />    </mappers></configuration>

 

3、编写测试类TestMyBatisSpring

package com.lmei.test;import static org.junit.Assert.assertNotNull;import java.util.List;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.lmei.dao.BookDaoI;import com.lmei.entity.Book;public class TestMyBatisSpring {    @Test    public void test() {        //初始化容器        ApplicationContext ctx = new ClassPathXmlApplicationContext("ApplicationContext.xml");                BookDaoI bookDao = ctx.getBean("bookDao",BookDaoI.class);               List<Book> books = bookDao.getAllBook();        for (Book book : books) {            System.out.println(book.getBookName());        }        assertNotNull(books);    }}

项目右键->Run As->JUnit Test，控制台输出

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四、Spring与MyBatis整合升级

1、修改ApplicationContext.xml，弃用MyBatisCfg.xml

“三、Spring与MyBatis初级整合”中ApplicationContext.xml需要用到MyBatisCfg.xml

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">    <property name="dataSource" ref="jdbcDataSource" /><property name="configLocation" value="classpath:MyBatisCfg.xml"></property> <!--指定配置文件--></bean>

MyBatisCfg.xml中，需要注册mapper，如果有多个，需要一一注册比较麻烦

<?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>        <!--com.lmei.entity下的所有类定义别名 -->    <typeAliases>        <package name="com.lmei.entity"/>    </typeAliases>        <mappers>        <!--注册BookMapper映射-->        <mapper resource="com/lmei/mapper/BookMapper.xml" />    </mappers></configuration>

 

引入自动扫描，将ApplicationContext.xml进行修改，原MyBatisCfg.xml弃用，将其配置转移到ApplicationContext.xml中

下面代码注释部分为原来配置，优化sql会话工厂bean，新增的自动扫描接口

<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context-4.3.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">    <!-- 引入db.properties属性文件 -->    <context:property-placeholder location="classpath:db.properties" />    <!--定义一个jdbc数据源，创建一个驱动管理数据源的bean -->    <bean id="jdbcDataSource"        class="org.springframework.jdbc.datasource.DriverManagerDataSource">        <property name="driverClassName" value="${jdbc.driver}" />        <property name="url" value="${jdbc.url}" />        <property name="username" value="${jdbc.username}" />        <property name="password" value="${jdbc.password}" />    </bean>    <!--创建一个sql会话工厂bean，指定数据源 -->    <!--         <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="jdbcDataSource" />指定数据源        <property name="configLocation" value="http://www.mamicode.com/classpath:MyBatisCfg.xml"></property> 指定配置文件    </bean> -->    <!--创建一个bookDao -->    <!--         <bean id="bookDao" class="org.mybatis.spring.mapper.MapperFactoryBean">        指定映射文件        <property name="mapperInterface" value="http://www.mamicode.com/com.lmei.dao.BookDaoI"></property>        指定sql会话工厂        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>    </bean> -->        <!--创建一个sql会话工厂bean，指定数据源 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <!-- 指定数据源 -->        <property name="dataSource" ref="jdbcDataSource" />        <!--类型别名包，默认引入com.lmei.entity下的所有类 -->        <property name="typeAliasesPackage" value="com.lmei.entity"></property>        <!--指定sql映射xml文件的路径 -->        <property name="mapperLocations"            value="classpath:com/lmei/mapper/*Mapper.xml"></property>    </bean>        <!--自动扫描映射接口-->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <!-- 指定sql会话工厂，在上面配置过的 -->        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>        <!-- 指定基础包，即自动扫描com.lmei.dao这个包下的所有接口类 -->        <property name="basePackage" value="com.lmei.dao"></property>    </bean>          <!--下面的配置暂时未使用 -->    <context:component-scan base-package="com.lmei">    </context:component-scan>    <aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy></beans>

 

2、修改测试类TestMyBasticSpring.java

package com.lmei.test;import static org.junit.Assert.assertNotNull;import java.util.List;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.lmei.dao.BookDaoI;import com.lmei.entity.Book;public class TestMyBatisSpring {    @Test    public void test() {        //初始化容器        ApplicationContext ctx=new ClassPathXmlApplicationContext("ApplicationContext.xml");        //获得bean       /* BookDaoI bookDao = ctx.getBean("bookDao",BookDaoI.class);*/        BookDaoI bookDao = ctx.getBean(BookDaoI.class);        //访问数据库        List<Book> books = bookDao.getAllBook();        for (Book book : books) {            System.out.println(book.getBookName());        }        assertNotNull(books);    }}

项目右键->Run As->Junit Test

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以上学习参考资料：

http://www.cnblogs.com/best/p/5638827.html

http://www.cnblogs.com/xdp-gacl/p/4271627.html

问题解决参考：

http://blog.csdn.net/xwin1989/article/details/6754790

http://blog.csdn.net/hy245120020/article/details/51821950

 

@_@)... 未完待续...接下来学习将在下一篇介绍

mybatis学习笔记（五） -- maven+spring+mybatis从零开始搭建整合详细过程（附demo和搭建过程遇到的问题解决方法）


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