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终极版：Mybatis整合Spring配置

第一部分：配置 Spring 框架

　　配置 SpringMVC 的步骤：

　　配置流程图：

　　SpringMVC 配置

　　1. 导入包（那些包，基本包 5 个，1 个日志依赖包，2 个 webmvc 支持包）

<!-- jsp -->
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.2.1</version>
            <scope>provided</scope>
        </dependency>
        <!-- servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- spring mvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.16.RELEASE</version>
        </dependency>

　　2. 构建一个请求

<form action="${pageContext.request.contextPath }/admin/addAdmin" method="post">
       管理员名称:<input name="admin_name" type="text"><input type="submit" value="增加管理员">
   </form>

　　3. 编辑 web.xml 配置核心控制器

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xml="http://www.w3.org/XML/1998/namespace"
    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 ">
    <!-- 编码支持过滤器 -->
    <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>
       <!-- 指定配置类的位置，指定包名会加载该包下的所有配置类 -->
       <init-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>cn.mgy.config</param-value>
       </init-param>
       <!-- 修改支持配置类的Spring容器 -->
       <init-param>
         <param-name>contextClass</param-name>
         <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
       </init-param>
       <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
      <servlet-name>dispatcherServlet</servlet-name>
      <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

　　4. 编写业务控制器

package cn.mgy.controller;

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

@Controller
@SessionScope
@RequestMapping(value="/admin")
public class AdminController {
    
    @RequestMapping(value="/addAdmin")
    public String addAdmin() {
        System.out.println("-增加管理员-");
        return "/add.jsp";
    }

}

　　5. 编写配置类

　　-- 容器配置类

@Configuration
@ComponentScan(basePackages="cn.gzsxt")
public class ContextConfig {

}

　　--SpringMVC 配置类

package cn.mgy.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
@EnableWebMvc //<mvc:annotation-driver>
public class MvcConfig extends WebMvcConfigurerAdapter {

    //<mvc:default-servlet-handler>,放开静态资源访问
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
}

　　6. 编写返回的页面

<%@ 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>增加学生成功的界面</title>
</head>
<body>
    <h3>增加学生成功</h3>
</body>
</html>

第二部分：配置 Mybatis 框架

　　Mybatis 配置流程图：

　　配置步骤说明：

　　1. 导入包（JDBC 驱动包，Mybatis 框架包，junit）

<!-- mybatis -->

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.1</version>
        </dependency>
        <!-- mysql -->

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <!-- junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

　　2. 创建一个总配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "mybatis-3-config.dtd" >
<configuration>

    <environments default="rbac">
        <environment id="rbac">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="org.gjt.mm.mysql.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/rbac" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>

</configuration>

　　3. 创建一个帮助类获得会话对象

package cn.mgy.utils;

import java.io.IOException;
import java.io.Reader;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public class MybatisUtils {
    
    public static final SqlSessionFactory SESSION_FACTORY=MybatisUtils.createSqlSessionFactory();
    
    private static SqlSessionFactory createSqlSessionFactory() {
    
        try {
            //读取配置文件
            Reader reader = Resources.getResourceAsReader("mybatis-config.xml");
            //创建会话工厂构建类对象
            SqlSessionFactoryBuilder builder=new SqlSessionFactoryBuilder();
            //返回会话工厂
            return builder.build(reader);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
    
    public static SqlSession getSqlSession() {
        return SESSION_FACTORY.openSession();
    }
    
    public static void main(String[] args) {
        System.out.println(MybatisUtils.getSqlSession());
    }

}

　　4. 创建一个映射接口（包括操作 SQL 语句的）

package cn.mgy.mapper;

import java.util.Map;

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Options;

/**
 * 管理员映射接口,用于操作tb_admin表
 * 
 * @author ranger
 *
 */
public interface AdminMapper {

    /**
     * 增加管理员记录
     * 
     * @param admin
     * @return
     */
    @Insert("INSERT INTO tb_admin(admin_name, admin_account, admin_pwd, admin_status, admin_create_date, role_id) VALUES (#{admin_name}, #{admin_account}, #{admin_pwd}, #{admin_status}, #{admin_create_date}, #{role_id})")
    @Options(useGeneratedKeys = true, keyProperty = "admin_id")
    int insert(Map<String, Object> admin);

}

　　5. 在总配置文件加载该映射接口

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "mybatis-3-config.dtd" >
<configuration>

    <environments default="rbac">
        <environment id="rbac">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="org.gjt.mm.mysql.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/rbac" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>
    
    <mappers>
      <mapper class="cn.mgy.mapper.AdminMapper"/>
    </mappers>

</configuration>

　　6. 编写一个测试类，测试插入数据

package cn.mgy.test.mapper;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.apache.ibatis.session.SqlSession;
import org.junit.Test;

import cn.mgy.mapper.AdminMapper;
import cn.mgy.utils.MybatisUtils;

public class AdminMapperTest {
    
    @Test
    public void insert() {
        SqlSession session = MybatisUtils.getSqlSession();
        AdminMapper adminMapper = session.getMapper(AdminMapper.class);
        Map<String, Object> admin=new HashMap<String, Object>();
        admin.put("admin_name", "admin");
        admin.put("admin_create_date", new Date());
        adminMapper.insert(admin);
        System.out.println(admin.get("admin_id"));
        session.commit();
        session.close();
        
    }

}

第三部分：整合这连个框架

　　配置步骤：

　　1. 导入包（那些包）

　　　　（1）Mybatis-Spring 整合包

　　　　（2）第三方数据源包（DBCP2）

　　　　（3）SpringJdbc+SpringTx（事务的支持）

<!-- mybatis-spring -->

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- spring jdbc -->

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.16.RELEASE</version>
        </dependency>
        
        <!-- dbcp2 -->


        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>2.2.0</version>
        </dependency>

    <!-- spring-test -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.16.RELEASE</version>
            <scope>test</scope>
        </dependency>

　　2. 创建数据源

@Value("${db.driverClassName}")
    private String driverClassName;
    @Value("${db.url}")
    private String url;
    @Value("${db.username}")
    private String username;
    @Value("${db.password}")
    private String password;

    //第一步：创建一个数据源
    @Bean
    public DataSource getDataSource() {
        BasicDataSource dataSource=new BasicDataSource();
        dataSource.setDriverClassName(driverClassName);
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        return dataSource;
    }

　　3. 创建支持 Spring 数据源的会话工厂

//第二步：获得会话工厂
    @Bean(name="sqlSessionFactory")
    public SqlSessionFactory getSessionFactory() {
        SqlSessionFactoryBean factoryBean=new SqlSessionFactoryBean();
        //指定使用的数据源
        factoryBean.setDataSource(this.getDataSource());
        try {
            factoryBean.afterPropertiesSet();
            return factoryBean.getObject();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

　　4. 扫描映射接口的动态对象到 Spring 容器里面

//扫描映射接口的动态对象到Spring容器
@MapperScan(basePackages="cn.gzsxt.mapper",annotationClass=Mapper.class)

　　5. 配置事务代理

@EnableTransactionManagement //<tx:annotation-driver>   // ②
    
    //第四步：配置事务代理
    @Bean   // ①
    public DataSourceTransactionManager getDataSourceTransactionManager() {
        DataSourceTransactionManager dstm=new DataSourceTransactionManager();
        //指定需要事务代理的数据源
        dstm.setDataSource(this.getDataSource());
        return dstm;
    }

　　6. 删除之前 Mybatis 帮助类以及配置文件。因为 Mybatis 配置好整合以后，已经交由 Spring 管理了。所以不需要原来的配置文件以及帮助类了！！

　　7. 修改映射接口增加 @Mapper 注解

package cn.mgy.mapper;

import java.util.Map;

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Options;

/**
 * 管理员映射接口,用于操作tb_admin表
 * 
 * @author ranger
 *
 */
@Mapper //增加扫描注解！！！
public interface AdminMapper {

    /**
     * 增加管理员记录
     * 
     * @param admin
     * @return
     */
    @Insert("INSERT INTO tb_admin(admin_name, admin_account, admin_pwd, admin_status, admin_create_date, role_id) VALUES (#{admin_name}, #{admin_account}, #{admin_pwd}, #{admin_status}, #{admin_create_date}, #{role_id})")
    @Options(useGeneratedKeys = true, keyProperty = "admin_id")
    int insert(Map<String, Object> admin);

}

　　8. 编写一个测试类测试

package cn.mgy.test.mapper;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;

import cn.mgy.config.ContextConfig;
import cn.mgy.config.DataConfig;
import cn.mgy.mapper.AdminMapper;

@RunWith(value=SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes= {ContextConfig.class,DataConfig.class})
@WebAppConfiguration //声明该单元测试在SpringMVC项目里面的
public class AdminMapperTest {
    
    @Autowired
    private AdminMapper adminMapper;
    
    @Test
    public void insert() {
        Map<String, Object> admin=new HashMap<String, Object>();
        admin.put("admin_name", "ranger");
        admin.put("admin_create_date", new Date());
        adminMapper.insert(admin);
        System.out.println(admin.get("admin_id"));
        
    }

}

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原文地址：https://www.cnblogs.com/maigy/p/10789837.html