Springmvc learning notes (6)-springmvc integration mybatis (built using maven in IDEA)

Springmvc learning notes (6)-springmvc integration mybatis (built using maven in IDEA)
Springmvc learning notes (6)-springmvc integration mybatis (built using maven in IDEA)

This article mainly shows how to build the springmvc + mybatis framework development environment through maven in intellij IDEA.

Requirement: Use springmvc and mybatis to query the product list

Integration ideas

Step 1: Integrate the dao Layer

Integrate mybatis with spring and use spring to manage er interfaces. Use the er scanner to automatically scan mapper interfaces for registration in spring.

Step 2: Integrate the service layer

Use spring to manage the service interface. Configure the service interface in the spring configuration file. Implement transaction control.

Step 3: integrate springmvc

Springmvc is a spring module and does not need to be integrated. Engineering Structure

Unlike the demo in mybatis Study Notes (17)-spring and mybatis integration,The integration in this article is built using maven.

For how to create a web application built using maven, refer to the previous article springmvc learning notes (1)-framework principles and getting started configuration.

new->project->mavenCreate a bare maven project and manually create a webapp directory

Insrc/mainCreate a folderwebapp

Add dependency

Pom. xml file

<code class="language-xml hljs "><!--{cke_protected}{C}%3C!%2D%2D%3Fxml%20version%3D%221.0%22%20encoding%3D%22UTF-8%22%3F%2D%2D%3E--><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelversion>4.0.0</modelversion>    <groupid>com.iot.learnssm</groupid>    <artifactid>learnssm-firstssm</artifactid>    <version>1.0-SNAPSHOT</version>    <packaging>war</packaging>    <properties>        <project.build.sourceencoding>UTF-8</project.build.sourceencoding>        <!--{cke_protected}{C}%3C!%2D%2D%20jar%20%E7%89%88%E6%9C%AC%E8%AE%BE%E7%BD%AE%20%2D%2D%3E-->        <spring.version>4.2.4.RELEASE</spring.version>    </properties>    <dependencies>        <!--{cke_protected}{C}%3C!%2D%2D%20spring%E6%A1%86%E6%9E%B6%2D%2D%3E-->        <dependency>            <groupid>org.springframework</groupid>            <artifactid>spring-webmvc</artifactid>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupid>org.springframework</groupid>            <artifactid>spring-core</artifactid>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupid>org.springframework</groupid>            <artifactid>spring-orm</artifactid>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupid>org.springframework</groupid>            <artifactid>spring-aspects</artifactid>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupid>org.springframework</groupid>            <artifactid>spring-test</artifactid>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupid>org.springframework</groupid>            <artifactid>spring-jdbc</artifactid>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupid>mysql</groupid>            <artifactid>mysql-connector-java</artifactid>            <version>5.1.38</version>        </dependency>        <dependency>            <groupid>org.mybatis</groupid>            <artifactid>mybatis</artifactid>            <version>3.3.1</version>        </dependency>        <dependency>            <groupid>org.mybatis</groupid>            <artifactid>mybatis-spring</artifactid>            <version>1.2.4</version>        </dependency>        <dependency>            <groupid>log4j</groupid>            <artifactid>log4j</artifactid>            <version>1.2.17</version>        </dependency>        <dependency>            <groupid>org.slf4j</groupid>            <artifactid>slf4j-api</artifactid>            <version>1.7.18</version>        </dependency>        <dependency>            <groupid>commons-dbcp</groupid>            <artifactid>commons-dbcp</artifactid>            <version>1.4</version>        </dependency>        <!--{cke_protected}{C}%3C!%2D%2D%20JSP%20tag%20%2D%2D%3E-->        <dependency>            <groupid>javax.servlet</groupid>            <artifactid>jstl</artifactid>            <version>1.2</version>        </dependency>        <dependency>            <groupid>taglibs</groupid>            <artifactid>standard</artifactid>            <version>1.1.2</version>        </dependency>    </dependencies></project></code>

There may be many dependencies added here, but they are always better than less-subscribed ones. I started to introduce less dependencies (springframework dependencies only reference spring-mvc, even if spring-core is not introduced), an error will be reported. In the future, a blog will be devoted to debugging problems in this series of notes.

Build package

Create each package in the java directory according to maven's explicit habits:

Com. Company Name. Project name. Module name

Here, my package is:

com.iot.learnssm.firstssm

Contains several sub-packages:

Controller mapper po service
Impl

Project Structure

The following notes record the integration of mapper, service, and controller.