Integración de Springmvc y mybatis (notas)

Preparación de la base de datos

mysql> CREATE DATABASE IF NOT EXISTS test_db_char
    -> DEFAULT CHARACTER SET utf8
    -> DEFAULT COLLATE utf8_chinese_ci;

create table menu(
id int primary key ,
name varchar(20),
pid int
)

insert into menu values(1,'系统设置',0);
insert into menu values(2,'销售管理',0);
insert into menu values(3,'修改密码',1);
insert into menu values(4,'添加用户',1);
insert into menu values(5,'销售人员新增',2);
insert into menu values(6,'删除销售人员',2);

Abra la conexión remota de la
base de datos Configuración de conexión de la base de datos: https://blog.csdn.net/isomebody/article/details/73012417 descargue el controlador
eclipse cómo importar el controlador MySQL JDBC para operar la base de datos con java

Tarro de importación

1. Configure web.xml: configure escuchas, controladores y parámetros de contexto

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns="http://java.sun.com/xml/ns/javaee" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

<!-- Spring的监听器和上下文参数 --> 
<!-- 上下文参数 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 监听器 -->
  <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  
 <!-- SpringMVC前端控制器 -->
  <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:springmvc.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup><!-- Tomcat启动，该类被加载 -->
  </servlet>
  <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  
  
  <!-- 字符编码过滤器 -->
  <filter>
  <filter-name>encoding</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>encoding</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

2.applicationContext.xml: configurar mybatis

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/aop
          http://www.springframework.org/schema/aop/spring-aop.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" default-autowire="byName">

<!--扫描service包-->
<context:component-scan base-package="com.service.impl"></context:component-scan>
<!--加载属性文件  并  创建数据源连接池-->
<context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value=""></property>
</bean>

<!-- Spring 整合mybatis -->
<!--创建mybatis的SqlSessionFactory工厂类对象-->
<bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean"><!--mybatis-spring-1.2.2  -->
<property name="dataSource" ref="dataSource"></property>
<property name="typeAliasesPackage" value="com.pojo"></property> <!-- <resultMap type="menu" id="mymap">类型别名，对包下的类起个别名 -->
</bean>

<!--扫描器:配置扫描mybatis的dao接口 ，会为dao接口创建myabtis的dao接口实现类对象，放置到session工厂中-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.bjsxt.mapper"></property>
<property name="sqlSessionFactoryBeanName" value="factory"></property>
</bean>



<!--声明spring 的事物管理器对象-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--声明以注解的方式配置spring 的事物-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
   <tx:attributes>
   <tx:method name="ins*"/>
   <tx:method name="del*"/>
   <tx:method name="upd*"/>
   <tx:method name="*" read-only="true"/>
   </tx:attributes>
</tx:advice>


<!-- 配置aop-Aspect Oriented Programming -->
<aop:config>
<aop:pointcut  expression="execution(* com.bjsxt.service.impl.*.*(..))" id="mypointcut"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="mypointcut"/>
</aop:config>


</beans>

jdbc.properties

configuración de la conexión sqlserver:

jdbc.driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
jdbc.url=jdbc:sqlserver://localhost;DatabaseName=[read]
jdbc.username=sa
jdbc.password=

configuración de conexión mysql:

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/read
jdbc.username=root
jdbc.password=

3.springmvc.xml: configure el controlador frontal

<?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-4.1.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.1.xsd 
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">
    <!-- 扫描注解 -->
    <context:component-scan base-package="com.bjsxt.controller"></context:component-scan>
    <!-- 注解驱动 -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <!-- 静态资源不拦截配置                                                     请求格式：*表示所有文件，**表示所有文件及子文件-->
    <mvc:resources location="/js/" mapping="/js/**"></mvc:resources>
    
    
    <!-- 视图解析器 -->
    <bean id="vierResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/"></property>
    <property name="suffix" value=".jsp"></property>
    </bean>
    </beans>

Los objetos simples de Java POJO (Plain Ordinary Java Object) son en realidad JavaBeans ordinarios, que son abreviaturas creadas para evitar confusiones con EJB.
Los atributos de la base de datos del menú más los métodos de obtención y configuración correspondientes.

Código del controlador:

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.pojo.Menu;
import com.service.MenuService;


@Controller
public class MenuController {
    
    
	
	/*Springmvc容器调用Spring容器中内容*/
	@Resource
	private MenuService menuServiceImpl;/*@Resource默认是byname注入，名字不同会根据类别*/
	
	
	@RequestMapping("show")
	@ResponseBody
    public List<Menu> show(){
    
    
		System.out.println("show");
		return menuServiceImpl.show();
		}
    
    
}

Cosas y configuración de la base de datos Mybatis bajo la misma ruta

import java.util.List;

import com.pojo.Menu;

public interface MenuMapper {
    
    
    List<Menu> selBypid(int pid);
}

MenuMapper.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">
<mapper namespace="com.bjsxt.mapper.MenuMapper">
  <resultMap type="menu" id="mymap">
      <id property="id" column="id"/>
      <collection property="children" select="com.bjsxt.mapper.MenuMapper.selBypid" column="id"></collection>
  </resultMap>
  <select id="selBypid" parameterType="int" resultMap="mymap">
     select * from menu where pid=#{0}
  </select>
</mapper>

Métodos llamados en tiempo de ejecución

La interfaz y la clase de implementación se registrarán automáticamente en el contenedor Spring.

public interface MenuService {
    
    

	List<Menu> show();
}

@Service
public class MenuServiceImpl implements MenuService{
    
    
    @Resource
	private MenuMapper meunMapper;
	
	@Override
	public List<Menu> show() {
    
    
		// TODO Auto-generated method stub
		
		return meunMapper.selBypid(0);
	}

}

Proceso de llamada: show-> controler-> MenuServiceImpl -> meunMapper-> mybatis

---

@RequestParam, @ResponseBody use
@Service anotación uso