SpringMVC集成mybatis
2018-12-12 本文已影响8人
简单Liml
参考链接：https://blog.csdn.net/ljheee/article/details/76618762
在上篇的基础上集成mybatis。
1.在resources目录下新建文件夹mapper，spring。
2.添加pom依赖：
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<jackson.version>2.5.4</jackson.version>
</properties>
<dependencies>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.39</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.1</version>
</dependency>
<!-- DAO框架：mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.21</version>
</dependency>
<!--J2EE-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>com.github.stefanbirkner</groupId>
<artifactId>system-rules</artifactId>
<version>1.16.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.9</version>
</dependency>
<!--其他需要的包-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
</dependencies>
<build>
<finalName>HelloWorld3</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.0.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
3.添加数据库jdbc.properties
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/mytest
username=root
password=123456
idleConnectionTestPeriod=60
maxIdleTime=240
acquireIncrement=5
initialPoolSize=10
maxPoolSize=30
minPoolSize=10
autoCommitOnClose=false
checkoutTimeout=1000
acquireRetryAttempts=2
4.建数据库表
image.png
5.在resources目录下添加mybatis设置mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- mybatis全局设置 -->
<settings>
<!--使用数据库自增id-->
<setting name="useGeneratedKeys" value="true" />
<setting name="useColumnLabel" value="true" />
<!-- 开启驼峰命名规范-->
<setting name="mapUnderscoreToCamelCase" value="true" />
</settings>
</configuration>
6.在resource/spring下建立spring-dao.xml文件
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:classpath="http://www.springframework.org/schema/c"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 启动SpringMVC的注解功能，它会自动注册HandlerMapping、HandlerAdapter、ExceptionResolver的相-->
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
</mvc:message-converters>
</mvc:annotation-driven>
<mvc:default-servlet-handler />
<!--扫描,Controller类-->
<context:component-scan base-package="com.lml.helloworld3"/>
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"
p:driverClass="${driver}"
p:jdbcUrl="${url}"
p:user="${username}"
p:password="${password}"
p:idleConnectionTestPeriod="${idleConnectionTestPeriod}"
p:maxIdleTime="${maxIdleTime}"
p:acquireIncrement="${acquireIncrement}"
p:initialPoolSize="${initialPoolSize}"
p:maxPoolSize="${maxPoolSize}"
p:minPoolSize="${minPoolSize}"
p:autoCommitOnClose="${autoCommitOnClose}"
p:checkoutTimeout="${checkoutTimeout}"
p:acquireRetryAttempts="${acquireRetryAttempts}"
p:preferredTestQuery="SELECT 1"
p:maxConnectionAge="3000"/>
<!-- mybatis文件配置，扫描所有mapper文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="typeAliasesPackage" value="com.lml.helloworld3.pojo"/>
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
</bean>
<!-- spring与mybatis整合配置，扫描所有dao,指定的映射器类是接口,接口方法可以用注解来指定 SQL 语句,但是 MyBatis 的映射器 XML 文件也可以用。 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"
p:basePackage="com.lml.helloworld3.dao"
p:sqlSessionFactoryBeanName="sqlSessionFactory"/>
<!-- 对模型视图名称的解析，即在模型视图名称添加前后缀(如果最后一个还是表示文件夹,则最后的斜杠不要漏了) 使用JSP-->
<!-- 默认的视图解析器 在上边的解析错误时使用 (默认使用html)- -->
<bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/views/"/><!--设置JSP文件的目录位置-->
<property name="suffix" value=".jsp"/>
<property name="exposeContextBeansAsAttributes" value="true"/>
</bean>
</beans>
7.修改web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
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"
version="3.1">
<display-name>Archetype Created Web Application</display-name>
<!--welcome pages-->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!--配置springmvc DispatcherServlet-->
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<!--配置dispatcher.xml作为mvc的配置文件-->
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-dao.xml</param-value>
<!--<param-value>/WEB-INF/dispatcher-servlet.xml</param-value>-->
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--把applicationContext.xml加入到配置文件中-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
<filter-name>encodingFilter</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>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<servlet-name>springMVC</servlet-name>
</filter-mapping>
</web-app>
8.实体类映射
先建立实体类UserModel:
package com.lml.helloworld3.pojo;
public class UserModel {
private int id;
private String userName;
private int userAge;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public int getUserAge() {
return userAge;
}
public void setUserAge(int userAge) {
this.userAge = userAge;
}
}
dao层：
package com.lml.helloworld3.dao;
import com.lml.helloworld3.pojo.UserModel;
public interface UserDao {
UserModel findById(int id);
}
Controller：
@RestController
@RequestMapping(value = "/myuser")
public class UserController {
@Autowired(required = false)
private UserDao userDao;
@RequestMapping(value = "/getUser",method = RequestMethod.GET)
public UserModel getUserById(){
return userDao.findById(1);
}
}
在mapper下建立sql：
<?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.xml 必须要包含上面的DTD头部（DOCTYPE） -->
<!-- namespace为命名空间，应该是mapper接口的全称-->
<mapper namespace="com.lml.helloworld3.dao.UserDao">
<select id="findById" parameterType="java.lang.Integer" resultType="com.lml.helloworld3.pojo.UserModel">
SELECT * FROM mytest.user_first where id = #{id}
</select>
</mapper>
9.目录结构如下
image.png
10.测试
image.png
