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终极版：Mybatis整合Spring配置
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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")); } }
