Springmvc,spring ,mybatis,整合,ssm
上一章内容:
1.spring框架:作用 开源的框架--提供IOC和AOP IOC控制反转 把创建对象的权力交于spring创建,并管理对象的生命周期,通过DI完成对象属性的注入。 2. spring配置中<bean>也可以使用注解@Component @Controller @Service @Repository 3. 自动注入: @Autowired 4. 注入的方式: set方法注入 构造方法注入。
2.SSM整合
2.1 ssm的整合
springmvc spring mybatis三个框架的整合。起始是spring和mybatis的整合。 只是把mybatis的配置内容整合到spring配置文件中。因为tomcat启动时会加载spring配置。
数据源 2. 配置映射文件
2.2 maven的web工程并加入依赖
pom.xml:
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.zyl</groupId>
<artifactId>ssm02</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>ssm02 Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring-version>5.2.10.RELEASE</spring-version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!--文件上传依赖-->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.5</version>
</dependency>
<!-- Commons FileUpload -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.4</version>
</dependency>
<!-- Commons IO -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.8.0</version>
</dependency>
<!--阿里云存储-->
<dependency>
<groupId>com.aliyun.oss</groupId>
<artifactId>aliyun-sdk-oss</artifactId>
<version>3.17.4</version>
</dependency>
<!--springmvc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring-version}</version>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.17</version>
</dependency>
<!--mybatis整合spring的依赖.3.0以后支持8以上-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
<!--spring-jdbc依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring-version}</version>
</dependency>
<!--mysql依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.19</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.34</version>
</dependency>
<!--servlet-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
<!--jackson-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.18.1</version>
</dependency>
<!--druid连接池: 存放连接数据库对象的池子。-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.23</version>
</dependency>
<!--jstl-->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
<build>
<finalName>ssm02</finalName>
</build>
</project>
2.3 写spring的配置文件
<?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.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--===========================先配置springmvc的内容=================================-->
<!--包扫描-->
<context:component-scan base-package="com.zyl"/>
<!--开启注解驱动-->
<mvc:annotation-driven/>
<!--放行静态资源-->
<mvc:default-servlet-handler/>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--文件上传解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!--最大上传的大小。单位byte字节。5M=5*1024*1024-->
<property name="maxUploadSize" value="5242880"/>
<!--设置文件上传的编码-->
<property name="defaultEncoding" value="utf-8"/>
</bean>
<!--========再配置spring 的内容===============================================-->
<!--配置数据源:可以存放多个连接数据库的对象Connecttion-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/bb?serverTimezone=Asia/Shanghai"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
<!--连接池最大的连接个数-->
<property name="maxActive" value="10"/>
<!--连接池初始的容量-->
<property name="initialSize" value="5"/>
<!--最大的等待时长:-->
<property name="maxWait" value="6000"/>
</bean>
<!--SqlSessionFactoryBean:该类就是用于spring整合mybatis配置文件-->
<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--指定 上面的数据源-->
<property name="dataSource" ref="dataSource"/>
<!--指定 映射文件的路径-->
<property name="mapperLocations" value="classpath:/mapper/*.xml"/>
</bean>
<!--为dao接口实现代理实现类
StudentDao studentDao =sqlSession.getMapper(studentDao.class)
并且生成完成后交与spring容器管理-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--为指定包下的所有的dao类接口生成代理实现类 -->
<property name="basePackage" value="com.zyl.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sessionFactory"/>
</bean>
</beans>
2.4 web.xml配置
记得把老的版本换掉:
<?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_4_0.xsd"
version="4.0">
<welcome-file-list>
<welcome-file>login1.jsp</welcome-file>
</welcome-file-list>
<!--编码过滤器-->
<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>
<!--是否设置请求的编码-->
<init-param>
<param-name>forceRequestEncoding</param-name>
<param-value>true</param-value>
</init-param>
<!--是否设置响应的编码-->
<init-param>
<param-name>forceResponseEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--加载spring配置文件-->
<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>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
2.5 生成mapper接口和映射文件和实体类
代码自动生成器:
2.6 编码过滤
自己写一个类,写编码过滤器、或者spring也我提供了一个编码过滤器。
<!--定义编码过滤器--> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <!--指定编码的值。默认ISO-8859-1--> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> <!--是否设置请求的编码--> <init-param> <param-name>forceRequestEncoding</param-name> <param-value>true</param-value> </init-param> <!--是否设置响应的编码--> <init-param> <param-name>forceResponseEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
controller层,
实体类,
(dao)Mapper.java,
Mapper.xml映射文件,
前端网页代码.jsp
具体整合源代码在我的项目ssm02中,记得去看!!!