Spring+SpringMVC+MyBatis集成（SSM）

1、导入需要用到的jar包

<dependencies>
    <!--spring核心包-->
    <dependency>
      <groupid>org.springframework</groupid>
      <artifactid>spring-context</artifactid>
      <version>${spring.version}</version>
    </dependency>
    <!--springmvc核心包-->
    <dependency>
      <groupid>org.springframework</groupid>
      <artifactid>spring-web</artifactid>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupid>org.springframework</groupid>
      <artifactid>spring-webmvc</artifactid>
      <version>${spring.version}</version>
    </dependency>
    <!--spring-test测试-->
    <dependency>
      <groupid>org.springframework</groupid>
      <artifactid>spring-test</artifactid>
      <version>${spring.version}</version>
    </dependency>
    <!--文件上传-->
    <dependency>
      <groupid>commons-fileupload</groupid>
      <artifactid>commons-fileupload</artifactid>
      <version>1.3.3</version>
    </dependency>
    <!--jackson-->
    <dependency>
      <groupid>com.fasterxml.jackson.core</groupid>
      <artifactid>jackson-databind</artifactid>
      <version>2.9.8</version>
    </dependency>
    <dependency>
      <groupid>junit</groupid>
      <artifactid>junit</artifactid>
      <version>4.12</version>
    </dependency>

    <!--servlet的包-->
    <dependency>
      <groupid>javax.servlet</groupid>
      <artifactid>javax.servlet-api</artifactid>
      <version>3.0.1</version>
    </dependency>

    <!--mybatis核心包-->
    <dependency>
      <groupid>org.mybatis</groupid>
      <artifactid>mybatis</artifactid>
      <version>3.4.6</version>
    </dependency>
    <!--数据库驱动包-->
    <dependency>
      <groupid>mysql</groupid>
      <artifactid>mysql-connector-java</artifactid>
      <version>5.1.46</version>
    </dependency>
    <!--log4j日志包：用于打印详细日志（可不要）：需配合log4j.properties使用-->
    <dependency>
      <groupid>log4j</groupid>
      <artifactid>log4j</artifactid>
      <version>1.2.17</version>
    </dependency>
    <!--mybatis与spring整合包是mybatis提供的(mybatis-spring-xxxx.jar)，不是spring-orm-->
    <dependency>
      <groupid>org.mybatis</groupid>
      <artifactid>mybatis-spring</artifactid>
      <version>1.3.2</version>
    </dependency>

    <!--spring的支持-->
    <dependency>
      <groupid>org.springframework</groupid>
      <artifactid>spring-jdbc</artifactid>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupid>org.springframework</groupid>
      <artifactid>spring-tx</artifactid>
      <version>${spring.version}</version>
    </dependency>
    <!--连接池-->
    <dependency>
      <groupid>commons-dbcp</groupid>
      <artifactid>commons-dbcp</artifactid>
      <version>1.4</version>
    </dependency>
  </dependencies>

 

2、数据库连接配置（jdbc.properties）

jdbc.driverclassname=com.mysql.jdbc.driver
jdbc.url=jdbc:mysql:///数据库名称?usessl=false&useunicode=true&characterencoding=utf8
jdbc.username=用户名
jdbc.password=密码

 

3、打印日志配置（可不要：log4j.properties【名字必须为这个】）

#log4j.properties(日志文件:)
log4j.rootlogger=error, stdout
#log4j.rootlogger=none
log4j.logger.cn.wang=trace　　注意：cn.wang是需要要打印日志的java文件所在的包

log4j.appender.stdout=org.apache.log4j.consoleappender
log4j.appender.stdout.layout=org.apache.log4j.patternlayout
log4j.appender.stdout.layout.conversionpattern=%d %p [%c] - %m%n

 

4、spring+mybatis的集成配置（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.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!--用来整合mybatis-->
    <!--事务使用：扫描的包 service-->
    <context:component-scan base-package="cn.wang.service"/>

    <!--引用jdbc配置的属性文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--数据源-->
    <bean id="datasource" class="org.apache.commons.dbcp.basicdatasource" destroy-method="close">
        <property name="driverclassname" value="${jdbc.driverclassname}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>

    <!--配置sqlsessionfactory-->
    <bean id="sqlsessionfactory" class="org.mybatis.spring.sqlsessionfactorybean">
        <property name="datasource" ref="datasource" />
        <!--配置别名-->
        <property name="typealiasespackage" value="cn.wang.domain"/>
        <!--注册映射文件:扫描mapper目录下的所有mapper.xml文件-->
        <property name="mapperlocations" value="cn.wang.mapper.*mapper.xml"/>
    </bean>

    <!--注入映射器（给单独一个mapper接口）-->
    <!--<bean id="usermapper" class="org.mybatis.spring.mapper.mapperfactorybean">
        <property name="mapperinterface" value="cn.wang.mapper.usermapper" />
        <property name="sqlsessionfactory" ref="sqlsessionfactory" />
    </bean>-->

    <!--注入映射器（给全部mapper接口：自动扫描mapper接口生成代理注入到spring）-->
    <bean class="org.mybatis.spring.mapper.mapperscannerconfigurer">
        <property name="basepackage" value="cn.wang.mapper" />
    </bean>

    <!--事务管理-->
    <bean id="transactionmanager" class="org.springframework.jdbc.datasource.datasourcetransactionmanager">
        <property name="datasource" ref="datasource"/>
    </bean>

    <!--以注解的形式进行事务管理-->
    <tx:annotation-driven transaction-manager="transactionmanager"/>

</beans>

 

5、springmvc配置（applicationcontext-mvc.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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--扫描的包controller-->
    <context:component-scan base-package="cn.wang.controller"/>

    <!--启用springmvc的注解支持-->
    <mvc:annotation-driven/>

    <!--静态资源放行-->
    <mvc:default-servlet-handler/>

    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.internalresourceviewresolver">
        <property name="prefix" value="/web-inf/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--文件上传解析器-->
    <bean id="multipartresolver"
          class="org.springframework.web.multipart.commons.commonsmultipartresolver">
        <property name="maxuploadsize">
            <value>200000000</value>
        </property>
    </bean>


</beans>

 

6、web.xml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">
  <!--spring核心配置文件-->
  <context-param>
    <param-name>contextconfiglocation</param-name>
    <param-value>classpath:applicationcontext.xml</param-value>
  </context-param>
  <!--springmvc的核心控制器-->
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.dispatcherservlet</servlet-class>
    <init-param>
      <!--springmvc的配置文件-->
      <param-name>contextconfiglocation</param-name>
      <param-value>classpath:applicationcontext-mvc.xml</param-value>
    </init-param>
    <!--即springmvc跟着服务器(tomcat)的启动而启动 -->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <!--使用杠（/）更加符合咱们的restful风格 -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!--spring启动的监听器-->
  <listener>
    <listener-class>org.springframework.web.context.contextloaderlistener</listener-class>
  </listener>

  <!-- 配置相应的过滤器:角色springmvc 的post请求的乱码问题 -->
  <!-- 配置编码方式过滤器,注意一点:要配置在所有过滤器的前面 -->
  <filter>
    <filter-name>encodingfilter</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>encodingfilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

</web-app>

 

7、mybatis的映射文件（实体类名+mapper.xml）

<?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">
<!--namespace:映射器的全限定名-->
<mapper namespace="cn.wang.mapper.usermapper">

    <!--id:映射器中对应的方法名，resulttype:返回的数据类型（这里使用了别名，别名在applicationcontext.xml里配置）-->
    <select id="findall" resulttype="user">
        select * from t_user
    </select>

</mapper>