ssm框架整合

目录

1.导入依赖

2.创建实体类

3.写dao层接口

4.写mybatis核心配置文件和接口配置文件

5.用spring整合Mybatis层也就是Dao层

6.spring整合Service层

7.添加web支持

8.完整的目录结构

   <dependency>         <groupId>junit</groupId>         <artifactId>junit</artifactId>         <version>4.12</version>     </dependency>     <!--数据库驱动-->     <dependency>         <groupId>mysql</groupId>         <artifactId>mysql-connector-java</artifactId>         <version>5.1.47</version>     </dependency>     <!-- 数据库连接池 -->     <dependency>         <groupId>com.mchange</groupId>         <artifactId>c3p0</artifactId>         <version>0.9.5.2</version>     </dependency>      <!--Servlet - JSP -->     <dependency>         <groupId>javax.servlet</groupId>         <artifactId>servlet-api</artifactId>         <version>2.5</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>      <!--Mybatis-->     <dependency>         <groupId>org.mybatis</groupId>         <artifactId>mybatis</artifactId>         <version>3.5.2</version>     </dependency>     <dependency>         <groupId>org.mybatis</groupId>         <artifactId>mybatis-spring</artifactId>         <version>2.0.2</version>     </dependency>      <!--Spring-->     <dependency>         <groupId>org.springframework</groupId>         <artifactId>spring-webmvc</artifactId>         <version>5.1.9.RELEASE</version>     </dependency>     <!--spring jdbc-->     <dependency>         <groupId>org.springframework</groupId>         <artifactId>spring-jdbc</artifactId>         <version>5.1.9.RELEASE</version>     </dependency>      <!-- spring的核心依赖 -->     <dependency>         <groupId>org.springframework</groupId>         <artifactId>spring-context</artifactId>         <version>5.1.9.RELEASE</version>     </dependency>      <dependency>         <groupId>com.fasterxml.jackson.core</groupId>         <artifactId>jackson-databind</artifactId>         <version>2.12.1</version>     </dependency>           <!--json的依赖-->     <dependency>         <groupId>com.alibaba</groupId>         <artifactId>druid-spring-boot-starter</artifactId>         <version>1.1.10</version>     </dependency>  </dependencies>     <!-- <dependency>          <groupId>com.fasterxml.jackson.core</groupId>          <artifactId>jackson-databind</artifactId>          <version>2.10.0</version>      </dependency>-->      <!--静态资源问题-->     <build>         <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>     </build>

package pojo;  public class books {     private int bookId;     private String bookName;     private int bookCounts;     private String detail;      public books(int bookId, String bookName, int bookCounts, String detail) {         this.bookId = bookId;         this.bookName = bookName;         this.bookCounts = bookCounts;         this.detail = detail;     }      public books() {     }      public int getBookId() {         return bookId;     }      public void setBookId(int bookId) {         this.bookId = bookId;     }      public String getBookName() {         return bookName;     }      public void setBookName(String bookName) {         this.bookName = bookName;     }      public int getBookCounts() {         return bookCounts;     }      public void setBookCounts(int bookCounts) {         this.bookCounts = bookCounts;     }      public String getDetail() {         return detail;     }      public void setDetail(String detail) {         this.detail = detail;     } } 

这里暂时只有一个方法

package Dao;  import pojo.books;  import java.util.List;  public interface BooksMapper {     List<books> selectbooks(); } 

这个是接口配置文件

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"         "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <!--把刚刚我们写的接口配置进去--> <mapper namespace="Dao.BooksMapper">  <select id="BooksMapper" resultType="pojo.books">     select * from books </select>   </mapper>

mybatis核心配置文件

<?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>     <!--把那个接口导进来-->     <mappers>         <package name="Dao"/>     </mappers> </configuration>

这个是spring整合Mybatis的xml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"        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">      <!-- 配置整合mybatis -->     <!-- 1.关联数据库文件 -->     <context:property-placeholder location="classpath:database.properties"/>      <!-- 2.数据库连接池 -->     <!--数据库连接池         dbcp 半自动化操作 不能自动连接         c3p0 自动化操作（自动的加载配置文件 并且设置到对象里面）     -->     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">         <!-- 配置连接池属性 -->         <property name="driverClass" value="${jdbc.driver}"/>         <property name="jdbcUrl" value="${jdbc.url}"/>         <property name="user" value="${jdbc.username}"/>         <property name="password" value="${jdbc.password}"/>          <!-- 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.配置SqlSessionFactory对象 -->     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">         <!-- 注入数据库连接池 -->         <property name="dataSource" ref="dataSource"/>         <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->         <property name="configLocation" value="classpath:mybatis-config.xml"/>     </bean>       <!--解释 ：https://www.cnblogs.com/jpfss/p/7799806.html-->     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">         <!-- 注入sqlSessionFactory -->         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>         <!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->         <property name="basePackage" value="Dao"/>     </bean>  </beans>

数据库配置文件，这里你们改一下数据库就OK

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

写接口和实现类

package Service;  import org.springframework.stereotype.Service; import pojo.books;  import java.util.List;  public interface BooksService {         List<books> selectbooks();     }  

实现类

 @Service  public class BooksServicelmpl implements BooksService{    /*这里是把Dao的接口引进来了因为Service层调用Dao层*/      @Autowired     private BooksMapper booksMapper;     public void setBooksMapper(BooksMapper booksMapper) {         this.booksMapper = booksMapper;     }     @Override     public List<books> selectbooks() {         return booksMapper.selectbooks();     } }

写spring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"        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">      <context:component-scan base-package="Service"/>     <!-- <bean id="bookServicelmpl" class="service.bookServicelmpl">      <property name="bookMapper" ref="bookMapper"/>      </bean>-->     <!--因为serv层要调Dao层我们把数据源拿过来，如果这里报红就是因为没有引入Dao的那个数据源-->     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">         <property name="dataSource" ref="dataSource"/>     </bean>  </beans>

关联spring配置文件，我们写个总的配置文件到进去就ok

<?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">      <import resource="classpath:spring-Service.xml"/>     <import resource="classpath:spring-Dao.xml"/> </beans>

7.spring整合Conteoller层

<?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    http://www.springframework.org/schema/context/spring-context.xsd    http://www.springframework.org/schema/mvc    https://www.springframework.org/schema/mvc/spring-mvc.xsd">      <!-- 扫描web相关的bean -->     <context:component-scan base-package="Controller"/>     <!-- 1.开启SpringMVC注解驱动 -->     <mvc:annotation-driven/>     <!-- 2.静态资源默认servlet配置-->     <mvc:default-servlet-handler/>       <!-- 配置视图解析器 -->     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">         <!-- 前缀 -->         <property name="prefix" value="/WEB-INF/jsp/"/>         <!-- 后缀 -->         <property name="suffix" value=".jsp"/>     </bean>      <mvc:annotation-driven>         <mvc:message-converters register-defaults="true">             <bean class="org.springframework.http.converter.StringHttpMessageConverter">                 <constructor-arg value="UTF-8"/>             </bean>             <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">                 <property name="objectMapper">                     <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">                         <property name="failOnEmptyBeans" value="false"/>                     </bean>                 </property>             </bean>         </mvc:message-converters>     </mvc:annotation-driven>   </beans>

写Controller的类

@RestController public class bookController {     @Autowired     private BooksService booksService;     public void setBooksService(BooksService booksService) {         this.booksService = booksService;     }     @RequestMapping("/books")     public List<books> selectbooks()     {         List<books> list = booksService.selectbooks();         return list;     } } 

把三个配置文件关联

<?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">      <import resource="classpath:spring-Service.xml"/>     <import resource="classpath:spring-Dao.xml"/>     <import resource="spring-mvc.xml"/> </beans>

 写web.xml文件里面都是死的

<?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">      <!--DispatcherServlet-->     <servlet>         <servlet-name>springmvc</servlet-name>         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>         <init-param>             <param-name>contextConfigLocation</param-name>             <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->             <param-value>classpath:applicationContext.xml</param-value>         </init-param>         <load-on-startup>1</load-on-startup>     </servlet>     <servlet-mapping>         <servlet-name>springmvc</servlet-name>         <url-pattern>/</url-pattern>     </servlet-mapping>      <!--乱码解决-->     <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>     </filter>     <filter-mapping>         <filter-name>encodingFilter</filter-name>         <url-pattern>/*</url-pattern>     </filter-mapping>      <!--Session过期时间-->     <session-config>         <session-timeout>15</session-timeout>     </session-config>  </web-app>

创建一个lib包把依赖导进去

添加工件测试