IDEA创建maven项目：Spring4+Mybatis3

打开IDEA，新建项目

这里我们选择webapp，自动创建web.xml。

GroupID是项目组织唯一的标识符，实际对应JAVA的包的结构，是main目录里java的目录结构。
ArtifactID就是项目的唯一的标识符，实际对应项目的名称，就是项目根目录的名称。

剩下的一路next就到finish，进入项目，此时会自动下载maven的一些文件，联网耐心即可。

打开pom.xml，这是maven的配置文件，用于管理项目的jar引用，我们在这里添加一些依赖：

<properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <!-- jar 版本设置 -->        <spring.version>4.3.9.RELEASE</spring.version>    </properties>    <dependencies>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>3.8.1</version>            <scope>test</scope>        </dependency>        <!-- spring框架-->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-orm</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aspects</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-test</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>${spring.version}</version>        </dependency>        //json        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-annotations</artifactId>            <version>2.5.4</version>        </dependency>        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-core</artifactId>            <version>2.5.4</version>        </dependency>        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-databind</artifactId>            <version>2.5.4</version>        </dependency>        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.38</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.3.1</version>        </dependency>        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis-spring</artifactId>            <version>1.2.4</version>        </dependency>        //日志        <dependency>            <groupId>log4j</groupId>            <artifactId>log4j</artifactId>            <version>1.2.17</version>        </dependency>        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-api</artifactId>            <version>1.7.18</version>        </dependency>        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-log4j12</artifactId>            <version>1.7.18</version>        </dependency>        <dependency>            <groupId>commons-dbcp</groupId>            <artifactId>commons-dbcp</artifactId>            <version>1.4</version>        </dependency>        <!-- JSP tag -->        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>        <dependency>            <groupId>taglibs</groupId>            <artifactId>standard</artifactId>            <version>1.1.2</version>        </dependency>        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-validator</artifactId>            <version>5.4.1.Final</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>        </dependency>    </dependencies>

在src／main／webapp／WEB-INF／目录下找到web.xml，修改配置

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"         version="3.1">    <!-- 激活Tomcat的defaultServlet来处理静态文件 -->    <servlet-mapping>        <servlet-name>default</servlet-name>        <url-pattern>*.jpg</url-pattern>    </servlet-mapping>    <servlet-mapping>        <servlet-name>default</servlet-name>        <url-pattern>*.gif</url-pattern>    </servlet-mapping>    <servlet-mapping>        <servlet-name>default</servlet-name>        <url-pattern>*.png</url-pattern>    </servlet-mapping>    <servlet-mapping>        <servlet-name>default</servlet-name>        <url-pattern>*.js</url-pattern>    </servlet-mapping>    <servlet-mapping>        <servlet-name>default</servlet-name>        <url-pattern>*.css</url-pattern>    </servlet-mapping>    <context-param>        <param-name>contextConfigLocation</param-name>        //通配符加载所有applicationContext        <param-value>classpath:spring/applicationContext-*.xml</param-value>    </context-param>    <!-- Log4j的监听器要放在spring监听器前面 -->    <listener>        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>    </listener>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <servlet>        <servlet-name>dispatcher</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:spring/springmvc.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>dispatcher</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>    <!-- 解决post乱码 -->    <filter>        <filter-name>characterEncodingFilter</filter-name>        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>        <init-param>            <param-name>encoding</param-name>            <param-value>UTF-8</param-value>        </init-param>    </filter>    <filter-mapping>        <filter-name>characterEncodingFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping></web-app>

在src／resources目录下新建spring文件夹，用于存放spring相关的配置文件，其下新建applicationContext-dao.xml

<beans xmlns="http://www.springframework.org/schema/beans"       xmlns:context="http://www.springframework.org/schema/context"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xmlns:mybatis="http://mybatis.org/schema/mybatis-spring"       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.xsd       http://mybatis.org/schema/mybatis-spring       http://mybatis.org/schema/mybatis-spring.xsd">    <!--jdk8不兼容-->    <!--<mybatis:scan base-package="com.hubert.web.mapper"/>-->    <!--扫描service-->    <context:component-scan base-package="com.hubert.web.service">    </context:component-scan>    <!-- 加载db.properties文件中的内容，db.properties文件中key命名要有一定的特殊规则 -->    <context:property-placeholder location="classpath:db.properties"/>    <!-- 配置数据源 ，dbcp -->    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">        <property name="driverClassName" value="${jdbc.driver}"/>        <property name="url" value="${jdbc.url}"/>        <property name="username" value="${jdbc.username}"/>        <property name="password" value="${jdbc.password}"/>        <property name="maxActive" value="30"/>        <property name="maxIdle" value="5"/>    </bean>    <!-- 从整合包里找，org.mybatis:mybatis-spring:1.2.4 -->    <!-- sqlSessionFactory -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <!-- 数据库连接池 -->        <property name="dataSource" ref="dataSource"/>    </bean>    <!-- mapper扫描器 -->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <!-- 扫描包路径，如果需要扫描多个包，中间使用半角逗号隔开 -->        <property name="basePackage" value="com.hubert.web.mapper"/>        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>    </bean></beans>

同一位置新建applicationContext-transaction.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:tx="http://www.springframework.org/schema/tx"       xmlns:aop="http://www.springframework.org/schema/aop"       xsi:schemaLocation="http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">    <!-- 事务管理器            对mybatis操作数据库事务控制，spring使用jdbc的事务控制类        -->    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <!-- 数据源        dataSource在applicationContext-dao.xml中配置了         -->        <property name="dataSource" ref="dataSource"/>    </bean>    <tx:annotation-driven transaction-manager="transactionManager"/></beans>

同一位置新建springmvc.xml

<beans xmlns="http://www.springframework.org/schema/beans"       xmlns:context="http://www.springframework.org/schema/context"       xmlns:mvc="http://www.springframework.org/schema/mvc"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       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.xsd    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">    <!-- 对于注解的Handler 可以单个配置     实际开发中加你使用组件扫描     -->    <!-- 可以扫描controller、service、...    这里让扫描controller，指定controller的包     -->    <context:component-scan base-package="com.hubert.web.controller"/>    <!-- 使用mvc:annotation-driven代替上面两个注解映射器和注解适配的配置     mvc:annotation-driven默认加载很多的参数绑定方法，     比如json转换解析器默认加载了，如果使用mvc:annotation-driven则不用配置上面的RequestMappingHandlerMapping和RequestMappingHandlerAdapter     实际开发时使用mvc:annotation-driven     -->    <mvc:annotation-driven>        <!--json-->        <mvc:message-converters register-defaults="true">            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">                <property name="objectMapper">                    <bean class="com.fasterxml.jackson.databind.ObjectMapper">                        <!--json的null值不参与序列化-->                        <property name="serializationInclusion">                            <value type="com.fasterxml.jackson.annotation.JsonInclude$Include">NON_NULL</value>                        </property>                    </bean>                </property>            </bean>        </mvc:message-converters>    </mvc:annotation-driven>    <!-- 视图解析器    解析jsp,默认使用jstl,classpath下要有jstl的包    -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <!-- 配置jsp路径的前缀 -->        <property name="prefix" value="/WEB-INF/jsp/"/>        <!-- 配置jsp路径的后缀 -->        <property name="suffix" value=".jsp"/>    </bean></beans>

在resource目录下新建数据库的配置文件db.properties

jdbc.driver=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://127.0.0.1:3306/db_name?useUnicode=true&characterEncoding=utf-8&useSSL=falsejdbc.username=rootjdbc.password=password

以及日志的配置文件log4j.properties

# Global logging configurationlog4j.rootLogger=DEBUG, stdout# Console output...log4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

idea帮我们创建的目录中还没有java，因此我们需要自己来创建，在src／main目录下新建java文件夹，其次是com.example之类的包名，然后将改文件夹设置为资源目录。

1.点击structure打开结构菜单
2.选中新建的java文件夹
3.设置为sources
4.apply and ok

这样项目就配置完成了，接下来就是代码的编写了～

ps：项目完成后大包发布tomcat的方法：Tomcat下使用war包发布项目