Spring-Mybatis整合（Eclipse IDE）
本文采用MAVEN创建SSM项目
（其中借用mybatis-generator自动生成数据库实体类对应代码）；
先贴出项目结构及依赖如下：
1.web.xml内容：
<!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> <!-- The front controller of this Spring Web application, responsible for handling all application requests --> <!-- springmvc前端控制器 --> <servlet> <servlet-name>springDispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!-- Map all requests to the DispatcherServlet for handling --> <servlet-mapping> <servlet-name>springDispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 实例化spring IOC容器的监听器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> </web-app>
2.spring相关配置内容：applicationContext.xml
<?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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" 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-4.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd"> <!-- 配置spring扫描，不扫描controller --> <context:component-scan base-package="com.sess"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 引入配置文件 --> <context:property-placeholder location="classpath:config.properties" /> <!-- 配置c3p0连接池 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${datasource.jdbc.driver.name}"></property> <property name="jdbcUrl" value="${datasource.url}"></property> <property name="user" value="${datasource.username}"></property> <property name="password" value="${datasource.password}"></property> </bean> <!-- 配置事务 --> <bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 就是支持事务注解的（@Transactional） --> <tx:annotation-driven transaction-manager="dataSourceTransactionManager" /> <!-- mybatis-spring整合 --> <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="configLocation" value="classpath:mybatis-config.xml"></property> <property name="mapperLocations" value="classpath:com/sess/mapper/*.xml"></property> <property name="typeAliasesPackage" value="com.sess.entity"></property> </bean> <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.sess.dao"></property> </bean> </beans>
3.springmvc相关配置：springmvc.xml
<?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: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/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <!-- mvc只扫描controller --> <context:component-scan base-package="com.sess" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 视图解析器 --> <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/view/"></property> <property name="suffix" value=".jsp"></property> </bean> <mvc:default-servlet-handler/> <mvc:annotation-driven/> </beans>
4.mybatis相关配置：mybatis-config.xml
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- Spring 整合 MyBatis 后， MyBatis中配置数据源，事务等一些配置都可以 迁移到Spring的整合配置中。MyBatis配置文件中只需要配置与MyBatis相关 的即可。 --> <!-- settings: 包含很多重要的设置项 --> <settings> <!-- 映射下划线到驼峰命名 --> <setting name="mapUnderscoreToCamelCase" value="true"/> <!-- 设置Mybatis对null值的默认处理 --> <setting name="jdbcTypeForNull" value="NULL"/> <!-- 开启延迟加载 --> <setting name="lazyLoadingEnabled" value="true"/> <!-- 设置加载的数据是按需还是全部 --> <setting name="aggressiveLazyLoading" value="false"/> <!-- 配置开启二级缓存 --> <setting name="cacheEnabled" value="true"/> </settings> </configuration>
5.数据库相关配置：config.properties
datasource.url = jdbc:mysql://localhost:3306/sakila?useUnicode=true&characterEncoding=utf-8&useSSL=false datasource.username = **** datasource.password = ****** datasource.jdbc.driver.name = com.mysql.jdbc.Driver
6.generator相关配置：generatorConfig.xml(generator可以通过三种方式来生成：命令行，maven,插件)
（可参考Blog地址：https://www.cnblogs.com/deng-cc/p/9340748.html，有详细介绍（转载））
其中配置文件如下：
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <!-- 配置生成器 --> <generatorConfiguration> <!--执行generator插件生成文件的命令： call mvn mybatis-generator:generate -e --> <!-- 引入配置文件 --> <properties resource="config.properties"/> <!--classPathEntry:数据库的JDBC驱动,换成你自己的驱动位置 可选 --> <classPathEntry location="D:\\SoftwareDevelop\\Maven-Repository\\mysql\\mysql-connector-java\\5.1.10\\mysql-connector-java-5.1.10.jar" /> <!-- 一个数据库一个context --> <!--defaultModelType="flat" 大数据字段，不分表 --> <context id="MysqlTables" targetRuntime="MyBatis3" defaultModelType="flat"> <!-- 自动识别数据库关键字，默认false，如果设置为true，根据SqlReservedWords中定义的关键字列表； 一般保留默认值，遇到数据库关键字（Java关键字），使用columnOverride覆盖 --> <property name="autoDelimitKeywords" value="true" /> <!-- 生成的Java文件的编码 --> <property name="javaFileEncoding" value="utf-8" /> <!-- beginningDelimiter和endingDelimiter：指明数据库的用于标记数据库对象名的符号，比如ORACLE就是双引号，MYSQL默认是`反引号； --> <property name="beginningDelimiter" value="`" /> <property name="endingDelimiter" value="`" /> <!-- 格式化java代码 --> <property name="javaFormatter" value="org.mybatis.generator.api.dom.DefaultJavaFormatter"/> <!-- 格式化XML代码 --> <property name="xmlFormatter" value="org.mybatis.generator.api.dom.DefaultXmlFormatter"/> <plugin type="org.mybatis.generator.plugins.SerializablePlugin" /> <plugin type="org.mybatis.generator.plugins.ToStringPlugin" /> <!-- 注释 --> <commentGenerator > <property name="suppressAllComments" value="true"/><!-- 是否取消注释 --> <property name="suppressDate" value="false" /> <!-- 是否生成注释代时间戳--> </commentGenerator> <!-- jdbc连接 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="${datasource.url}" userId="${datasource.username}" password="${datasource.password}" /> <!-- 类型转换 --> <javaTypeResolver> <!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） --> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!-- 生成实体类地址 --> <javaModelGenerator targetPackage="com.sess.entity" targetProject="src/main/java" > <property name="enableSubPackages" value="false"/> <property name="trimStrings" value="true"/> </javaModelGenerator> <!-- 生成mapxml文件 --> <sqlMapGenerator targetPackage="com.sess.mapper" targetProject="src/main/java" > <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- 生成mapxml对应client，也就是接口dao --> <javaClientGenerator targetPackage="com.sess.dao" targetProject="src/main/java" type="XMLMAPPER" > <property name="enableSubPackages" value="false" /> </javaClientGenerator> <!-- table可以有多个,每个数据库中的表都可以写一个table，tableName表示要匹配的数据库表,也可以在tableName属性中通过使用%通配符来匹配所有数据库表,只有匹配的表才会自动生成文件 --> <table tableName="actor" domainObjectName="Actor" > <property name="useActualColumnNames" value="false" /> <!-- 数据库表主键 --> <generatedKey column="id" sqlStatement="Mysql" identity="true" /> </table> <!--<table tableName="book" enableCountByExample="true" enableUpdateByExample="true" enableDeleteByExample="true" enableSelectByExample="true" selectByExampleQueryId="true">--> <!--<property name="useActualColumnNames" value="false" />--> <!--<!– 数据库表主键 –>--> <!--<generatedKey column="id" sqlStatement="Mysql" identity="true" />--> <!--</table> enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"--> </context> </generatorConfiguration>
※如果通过maven的形式创建，需要在pom中加入如下代码
<build> <finalName>springmvc-demo01</finalName> <plugins> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <executions> <execution> <id>mybatis-generator</id> <phase>deploy</phase> <goals> <goal>generate</goal> </goals> </execution> </executions> <configuration> <!-- Mybatis-Generator 工具配置文件的位置 --> <configurationFile>src/main/resources/mybatis-generator/generatorConfig.xml</configurationFile> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.46</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.2</version> </dependency> </dependencies> </plugin> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <classifier>exec</classifier> </configuration> </plugin> </plugins> </build>
MAVEN形式生成方法如下：
7.Controller中代码如下：TestController.java
package com.sess.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import com.sess.dao.ActorMapper; import com.sess.entity.Actor; @RestController public class TestController { @Autowired private ActorMapper actorMapper; @RequestMapping("/hello") public String testHello(Short id) { Actor actor = actorMapper.selectByPrimaryKey(id); return actor.getFirstName(); } }
8.最后贴上pom文件：pom.xml
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.sess</groupId> <artifactId>springmvc-demo01</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>springmvc-demo01 Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.10</version> </dependency> <!-- mybatis相关 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.1</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.14</version> <scope>compile</scope> </dependency> <!-- mybatis-spring整合 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> </dependencies> <build> <finalName>springmvc-demo01</finalName> <plugins> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <executions> <execution> <id>mybatis-generator</id> <phase>deploy</phase> <goals> <goal>generate</goal> </goals> </execution> </executions> <configuration> <!-- Mybatis-Generator 工具配置文件的位置 --> <configurationFile>src/main/resources/mybatis-generator/generatorConfig.xml</configurationFile> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.46</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.2</version> </dependency> </dependencies> </plugin> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <classifier>exec</classifier> </configuration> </plugin> </plugins> </build> <properties> <springVersion>4.1.7.RELEASE</springVersion> </properties> </project>
最后小记：
1.mybatis-generator自动生成代码：笔者尝试过maven形式和eclipse插件形式
①maven形式中，generatorConfig.xml中为targetProject="src/main/java"
②eclipse插件形式中，generatorConfig.xml中为targetProject="springmvc-demo01"
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