spring-mybatis的整合

1、导入包

2、创建一个请求文件发送请求

 <%@ 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>
     <form action="${pageContext.request.contextPath }/student/login.html" method="post">
         用户名：<input type="text" name="studentName" /> <br />
         密码：<input type="text" name="studentPwd" /> <br />
         <input type="submit" value="登录">
     </form>
 </body>
 </html>

3、① 创建 web.xml 文件（核心控制器，拦截所有的请求）

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
   <display-name>springmvc-mybatis-001</display-name>
   <!-- 配置过滤器 -->
   <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>
   <!-- 配置核心控制器 -->
   <servlet>
       <servlet-name>dispatcherServlet</servlet-name>
       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       <!-- 加载spring配置文件 -->
       <init-param>
           <param-name>contextConfigLocation</param-name>
           <param-value>classpath:spring-*.xml</param-value>
       </init-param>
   </servlet>
   <servlet-mapping>
       <servlet-name>dispatcherServlet</servlet-name>
       <url-pattern>*.html</url-pattern>
   </servlet-mapping>
   <welcome-file-list>
     <welcome-file>index.jsp</welcome-file>
   </welcome-file-list>
 </web-app>

② 创建扫描组件的文件

 <?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"
     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">

     <context:component-scan base-package="cn.mgy" />

 </beans>

4、创建业务层处理请求

① 创建一个StudentController

 package cn.mgy.controller;

 import javax.servlet.http.HttpServletRequest;

 import org.springframework.context.support.ClassPathXmlApplicationContext;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;

 import cn.mgy.mapper.StudentMapper;
 import cn.mgy.pojo.Student;

 @Controller
 @RequestMapping("/student")
 public class StudentController {

     @RequestMapping("/login")
     public String login(Student student,HttpServletRequest req) {
         ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:spring-*.xml");
         StudentMapper studentMapper = context.getBean(StudentMapper.class);
         Student student2 = studentMapper.findByStudent(student.getStudentName(), student.getStudentPwd());
         req.setAttribute("student", student2);
         context.close();
         return "/view/login.jsp";
     }
 }

② 创建一个Student实体类

 package cn.mgy.pojo;

 import java.io.Serializable;
 import java.util.Date;

 public class Student implements Serializable {

     private static final long serialVersionUID = 7276888295138830869L;
     private Long studentId;
     private String studentName;
     private String studentPwd;
     private Integer studentStatus;
     private Date createDate;
     private String studentAccount;
     public Long getStudentId() {
         return studentId;
     }
     public void setStudentId(Long studentId) {
         this.studentId = studentId;
     }
     public String getStudentName() {
         return studentName;
     }
     public void setStudentName(String studentName) {
         this.studentName = studentName;
     }
     public String getStudentPwd() {
         return studentPwd;
     }
     public void setStudentPwd(String studentPwd) {
         this.studentPwd = studentPwd;
     }
     public Integer getStudentStatus() {
         return studentStatus;
     }
     public void setStudentStatus(Integer studentStatus) {
         this.studentStatus = studentStatus;
     }
     public Date getCreateDate() {
         return createDate;
     }
     public void setCreateDate(Date createDate) {
         this.createDate = createDate;
     }
     public String getStudentAccount() {
         return studentAccount;
     }
     public void setStudentAccount(String studentAccount) {
         this.studentAccount = studentAccount;
     }
 }

5、配置数据源（整合Mybatis配置）

分三步：① 创建会话工厂；② 创建一个扫描器，将操作接口的操作对象扫描到Spring容器；③ 配置事务代理

 <?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"
     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-4.3.xsd">

     <!-- 配置连接池 -->
     <bean name="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
         <!-- 四要素：-->
         <!-- 驱动 -->
         <property name="driverClassName" value="org.gjt.mm.mysql.Driver"/>
         <!-- 连接字符串 -->
         <property name="url" value="jdbc:mysql://localhost:3306/sms?useSSL=true"/>
         <!-- 用户名 -->
         <property name="username" value="root"/>
         <!-- 密码 -->
         <property name="password" value="root"/>
     </bean>

     <!--
         如何让 Mybatis 使用 Spring 的连接池？
         Mybatis 整合包的实现方式，是让 Spring 代理 Mybatis 创建会话工厂，然后实现一个扫描器，
         将 Mybatis 的操作接口加到 Spring 容器里面
      -->
      <!-- 1. 创建 Spring 代理的会话工厂 -->
      <bean name="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
          <!-- 会话工厂引用连接池 -->
          <property name="dataSource" ref="dataSource"></property>
          <!-- 指定别名 -->
          <property name="typeAliasesPackage" value="cn.mgy.pojo"></property>
          <!-- 配置映射文件，Spring 支持通配符*，表示加载 -mapper.xml 结尾映射文件 -->
          <property name="mapperLocations" value="classpath:cn/mgy/mapper/xml/*-mapper.xml"></property>
          <property name="configuration">
              <!-- 对应 mybatis-config.xml 中的 settings 标签 -->
               <bean class="org.apache.ibatis.session.Configuration">
                 <!-- 支持驼峰命名法 -->
                 <property name="mapUnderscoreToCamelCase" value="true"></property>
               </bean>
          </property>
      </bean>
      <!-- 2. 使用扫描器将操作的接口扫描到 Spring 容器 -->
      <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
          <!-- 使用会话工厂 -->
          <property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean"></property>
          <!-- 扫描的接口所在的包 -->
          <property name="basePackage" value="cn.mgy.mapper"></property>
      </bean>
     <!-- 3. Spring 支持 Mybatis 的事务代理，代理 Mybatis 的事务 -->
     <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
         <!-- 对那个数据源使用事务代理 -->
         <property name="dataSource" ref="dataSource"></property>
     </bean>
     <!-- 编程式事务代理，事务注解支持事务 -->
     <tx:annotation-driven transaction-manager="transactionManager"/>
 </beans>

6、创建映射接口

 package cn.mgy.mapper;

 import org.apache.ibatis.annotations.Param;

 import cn.mgy.pojo.Student;

 public interface StudentMapper {
     /**
      * 查询学生
      * @param student
      * @return
      */
     Student findByStudent(@Param("studentName")Object studentName,@Param("studentPwd")Object studentPwd);
 }

7、创建映射文件

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "mybatis-3-mapper.dtd" >
 <mapper namespace="cn.mgy.mapper.StudentMapper">
   <select id="findByStudent" resultType="Student">
       SELECT * FROM tb_student WHERE STUDENT_NAME=#{studentName} AND STUDENT_PWD=#{studentPwd}
   </select>
 </mapper>

附：数据库