利用MybatisGenerator來整合SSM框架

步驟詳細解答

1. 下載MybatisGenerator,此處提供網址 https://github.com/mybatis/generator/releases

2. 完成之後使用IntelliJ將下載的源代碼作爲一個項目打開

3. 運行MainUI類即可出現如下界面（我這裏就一個user表，裏面有 id int ，age int , name varchar）

記住點擊數據庫，然後按照我上面所寫填寫，因爲後面我是要使用com.ysp作爲包掃描的。

我把代碼放在桌面方便複製到項目中。

4. 用IntelliJ平臺的Maven創建新的webapp項目

記得導入所需要的包

<dependencies>
  <!--Servlet 3.0, EJB Lite 3.1, JPA 2.0, JSP 2.2, EL 1.2, JSTL 1.2, JSF 2.0, JTA 1.1, JSR-45, JSR-250.-->
  <dependency>
    <groupId>javax</groupId>
    <artifactId>javaee-web-api</artifactId>
    <version>6.0</version>
    <scope>provided</scope>
  </dependency>
  <!--MySQL-->
  <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.34</version>
  </dependency>
  <!--MyBatis-->
  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.0</version>
  </dependency>
  <!--gson-->
  <dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.7</version>
  </dependency>
  <!--Spring 核心-->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.3.7.RELEASE</version>
  </dependency>
  <!--Spring MVC-->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.7.RELEASE</version>
  </dependency>
  <!--Database Connection Pool 數據庫連接池-->
  <dependency>
    <groupId>commons-dbcp</groupId>
    <artifactId>commons-dbcp</artifactId>
    <version>1.4</version>
  </dependency>

  <!--MyBatis-Spring-->
  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.0</version>
  </dependency>

  <!--junit4 -->
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.10</version>
    <scope>test</scope>
  </dependency>

  <!--SpringTest-->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>3.2.4.RELEASE</version>
    <scope>provided</scope>
  </dependency>

  <!--Spring JDBC-->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>4.3.7.RELEASE</version>
  </dependency>
  <!--log4j-->
  <dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
  </dependency>
  <!--slf4j-->
  <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.7</version>
  </dependency>
  <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.7.7</version>
  </dependency>
  <!-- 映射JSON -->
  <dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.9.13</version>
  </dependency>

  <!--spring-aop相關-->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>4.3.7.RELEASE</version>
  </dependency>

  <dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjrt</artifactId>
    <version>1.6.12</version>
  </dependency>

  <dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.6.12</version>
  </dependency>

<dependency>
    <groupId>cglib</groupId>
    <artifactId>cglib</artifactId>
    <version>2.2</version>
  </dependency>
</dependencies>

然後開始配置 web.xml

這裏我把所有的配置都寫在了spring-mvc.xml中

然後我把MybatisGenerator生成的代碼放到了項目路徑下（這裏請注意加入之後需要 file->projectstructure->module

將自己的複製進來的文件作爲source,具體操作就是點下文件，再點下source）

這裏展示下我的目錄結構

接下來我給出我的配置：

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
        http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <!-- Spring和mybatis的配置文件 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring-mvc.xml</param-value>
  </context-param>

  <!-- 編碼過濾器 -->
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <async-supported>true</async-supported>
    <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>

  <!-- Spring監聽器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 防止Spring內存溢出監聽器 -->
  <listener>
    <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
  </listener>

  <!--Spring MVC servlet-->
  <servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
    <async-supported>true</async-supported>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <!-- 此處可以可以配置成*.do，對應struts的後綴習慣 -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <welcome-file-list>
    <welcome-file>/index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

spring-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"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-4.3.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
">
    <!--開啓包掃描-->
    <context:component-scan base-package="com.ysp"/>
    <!--開啓springmvc註解-->
    <mvc:annotation-driven/>
    <!--定義跳轉的前後綴-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp"/>
        <property name="suffix" value=".jsp"/>
    </bean>
     <!--對靜態資源不攔截-->
    <mvc:default-servlet-handler/>

    <!--以下配置Mybatis-->

    <!--數據源-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://127.0.0.1:3306/test?useUnicode=yes&characterEncoding=UTF-8"/>
        <property name="username" value="root"/>
        <property name="password" value="123"/>
        <property name="maxActive" value="10"/>
        <property name="maxIdle" value="2"/>
        <property name="maxWait" value="12000"/>
    </bean>

    <!--配置sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    <!--mybatis全局配置-->
    <property name="configuration">
        <bean class="org.apache.ibatis.session.Configuration">
            <!--駝峯命名轉換-->
            <property name="mapUnderscoreToCamelCase" value="true"/>
            <!--是否開啓緩存-->
            <property name="cacheEnabled" value="true"/>
            <!--是否開啓懶加載-->
            <property name="lazyLoadingEnabled" value="false"/>
            <!--允許 JDBC 支持自動生成主鍵，需要驅動兼容-->
            <property name="useGeneratedKeys" value="true"/>
        </bean>
    </property>
        <!--掃描mapper下的xml文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>

    <!--掃描Dao接口並對其實例化-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="com.ysp.dao"/>
    </bean>

</beans>

4.最後寫了一個控制類來嘗試效果

package com.ysp.control;

import com.ysp.bean.User;
import com.ysp.dao.UserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * Created by asus on 2018.03.28.
 */
@Controller
public class HelloControl {
    @Autowired
     UserDao userDao;
    @RequestMapping("hello")
    @ResponseBody
    public String hello(){
        User user=new User();
        user.setAge(18);
        user.setName("俞少鵬");
        user.setId((long)18);
        return ""+userDao.insert(user);
    }
}

利用MybatisGenerator來整合SSM框架

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