1、依赖
基于空的maven项目；
<dependencies> <!-- https://mvnrepository.com/artifact/junit/junit --> <!--测试依赖包--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13</version> <scope>test</scope> </dependency> <!--spring依赖--> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.4.RELEASE</version> </dependency> <!--spirng操作数据库依赖--> <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.2.4.RELEASE</version> </dependency> <!--mysql数据库连接依赖--> <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.48</version> </dependency> <!-- 数据库连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!--mybatis依赖--> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.4</version> </dependency> <!--mybatis整合spring依赖--> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.3</version> </dependency> <!--spring mvc依赖--> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency> <!--jsp依赖--> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.3.3</version> <scope>provided</scope> </dependency> <!--jstl依赖--> <!-- https://mvnrepository.com/artifact/javax.servlet/jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> </dependencies> <build> <!--配置打包时不过滤非java文件开始 --> <!--说明，在进行模块化开发打jar包时，maven会将非java文件过滤掉， xml,properties配置文件等，但是这些文件又是必需的， 使用此配置可以在打包时将不会过滤这些必需的配置文件。 --> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> <!--配置打包时不过滤非java文件结束 --> </build>
2、整合MyBatis
2.1 在resource下新建一个mybatis-config.xml 配置文件；
<?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> </configuration>
2.2 再建一个spring的核心配置文件applicationContext.xml；
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> </beans>
2.3 新建一个数据库连接信息配置文件：datasource.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&CharacterEncoding=utf-8&useUnicode=true&serverTimezone=UTC jdbc.user=root jdbc.password=123456
2.4 这时可以补齐java目录下的包；dao（mapper）、service、controller、pojo（bean）;
2.5 这时新建一个spring-mapper.xml，用于配置数据库连接串、数据库连接池、sqlSessionFactory和spring自动扫描mapper包自动注入 xxxMapper.xml文件；不然就要手动注入了；
<?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" 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"> <!--0、导入数据库信息配置--> <!--<context:properties location="datasource.properties" />--> <context:property-placeholder location="classpath:datasource.properties"></context:property-placeholder> <!--1、配置数据库信息--> <!--2、配置连接源，这里使用的c3p0的数据源，没用spring自带的--> <bean class="com.mchange.v2.c3p0.ComboPooledDataSource" id="dataSource"> <property name="driverClass" value="${jdbc.driver}"></property> <property name="jdbcUrl" value="${jdbc.url}"></property> <property name="user" value="${jdbc.user}"></property> <property name="password" value="${jdbc.password}"></property> <!-- c3p0连接池的私有属性 --> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!-- 关闭连接后不自动commit --> <property name="autoCommitOnClose" value="false"/> <!-- 获取连接超时时间 --> <property name="checkoutTimeout" value="10000"/> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!--3、提供SqlSessionFactory 关联数据源； 关联mybatis配置文件 --> <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory"> <property name="dataSource" ref="dataSource"></property> <property name="configLocation" value="classpath:mybatis-config.xml"></property> </bean> <!--4、自动扫描mapper文件，动态的实现了Dao接口注入到spirng容器中--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--注入sqlSessionFactory--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> <!--扫描mapper包，实现动态注入--> <property name="basePackage" value="com.doubleh.mapper"></property> </bean> </beans>
3、整合Spring
新建一个spring-service.xml，负责业务处理的配置；
这一步整合好了，可以测试下数据库连接和数据获取是否正常了。
<?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" 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"> <!--1、自动扫描service 的bean--> <context:component-scan base-package="com.doubleh.service"></context:component-scan> <!--2.将我们的所有业务类注入spring容器中，可以通过配置或者注解注入--> <!--3、声明式事务支持--> <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="dataSourceTransactionManager"> <!--注入dataSource--> <property name="dataSource" ref="dataSource"></property> </bean> <!--4、AOP 有需要的话在这边配置--> </beans>
4、整合SpringMVC
4.1 项目添加web应用；
4.2 web.xml 添加 DispatcherServlet 和 乱码过滤；
<?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"> <!--配饰spring mvc 的servlet调度器--> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--配置spring容器--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </init-param> <!--设置启动级别--> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--乱码过滤--> <filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
4.3 新建一个spring-mvc.xm配置文件；
处理controller层业务，配置mvc的注解驱动，忽略静态资源、扫描controller层，添加beanName和url的处理映射器配置、controller处理适配器配置和视图解析配置；
<?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 http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--1、配置spring mvc注解驱动--> <mvc:annotation-driven /> <!--2、配置mvc忽略静态资源的调度--> <mvc:default-servlet-handler /> <!--3、扫描controller包，自动注入--> <context:component-scan base-package="com.doubleh.controller"></context:component-scan> <!--4、配置bean名和url处理映射器--> <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean> <!--5、配置controller处理适配器--> <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean> <!--6、配置视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
5、测试
用于测试数据库连接是否正常；
@Test public void test1(){ ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); BookService bean = (BookService) context.getBean("bookServiceImpl"); List<Books> books = bean.queryAll(); for (Books book : books) { System.out.println(book); } }
6、问题
6.1 报404错误
查看控制台输出，看一下是不是缺少了什么jar包。
如果jar包存在，显示无法输出，就在IDEA的项目发布中，添加lib依赖！
如果lib依赖没问题，就查看下spring-mvc相关配置是否正确。比如：视图解析器中前后缀是否写错了。