SSM整合 Spring+SpringMVC + Mybatis
SSM整合
-
项目基本结构
-
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <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.luoshen</groupId> <artifactId>ssm-book</artifactId> <version>1.0-SNAPSHOT</version> <dependencies> <!--Junit--> <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> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.9.RELEASE</version> </dependency> <!--Lombok--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.12</version> </dependency> <!--事务--> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.8.13</version> </dependency> </dependencies> <!--在build中配置resources,来防止我们资源导出失败的问题--> <build> <resources> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> </resources> </build>
-
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> <!--别名--> <typeAliases> <package name="com.luoshen.pojo"/> </typeAliases> <!--mapper映射--> <mappers> <package name="com.luoshen.mapper"/> </mappers> </configuration>
-
db.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/luoshen?serverTimezone=CST&useUnicode=true&characterEncoding=utf-8&useSSL=true jdbc.username=root jdbc.password=root
-
spring-dao.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" xmlns:context="http://www.springframework.org/schema/context" 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"> <!--导入数据库配置文件--> <context:property-placeholder location="classpath:db.properties"/> <!--配置连接池--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource "> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"></property> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!--关闭连接后不自动提交--> <property name="autoCommitOnClose" value="false"/> <!--获取连接超时时间--> <property name="checkoutTimeout" value="1000"/> <!--获取连接失败重试次数--> <property name="acquireRetryAttempts" value="2"/> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!--绑定mybatis配置文件 --> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!--配置dao接口扫描动态实现dao接口注入spring--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--注入sqlSessionFactory--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!--扫描dao--> <property name="basePackage" value="com.luoshen.mapper"/> </bean> </beans>
-
spring-service.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" xmlns:context="http://www.springframework.org/schema/context" 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"> <!--扫描service包 把所以带@Service @Autowired 注解的注册到spring--> <context:component-scan base-package="com.luoshen.service"/> <!--事务--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/> </bean> </beans>
-
spring-mvc.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" xmlns:mvc="http://www.springframework.org/schema/mvc" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <import resource="classpath:spring-dao.xml"></import> <import resource="classpath:spring-service.xml"></import> <!--注解替换原始配置--> <!--自动扫描包让包下面的注解生效--> <context:component-scan base-package="com.luoshen.controller"/> <!--让springmvc不处理静态资源.css .js .mp3等--> <mvc:default-servlet-handler/> <!--开启注解驱动 默认就配置了HandlerMapping HandlerAdapter--> <mvc:annotation-driven/> <!--配置处理器映射器 --> <!-- DispatchServlet把请求发给HandlerMapping--> <!--HandlerMapping根据链接找到handler (spring中的每个bean就是一个handler)--> <!--<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>--> <!--配置处理器适配器--> <!--负责执行DispatchServlet发送的handler--> <!-- <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>--> <!--视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </beans>
-
web.xml
<?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"> <!--1、DispatcherServlet--> <servlet> <servlet-name>spring-mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <!--此处不能单绑定spring-mvc.xml的配置文件,这样找不到service层的bean--> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <!--和tomcat一起启动--> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring-mvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--2、post乱码过滤--> <filter> <filter-name>springEncodingFilter</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>springEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!--session过期时间--> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app>
-
User.java
package com.luoshen.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data//会缺少有参构造 @AllArgsConstructor//有参构造 @NoArgsConstructor//无参构造 public class User { private int id; private String name; }
-
UserMapper.xml
<?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 namespace="com.luoshen.mapper.UserMapper"> <select id="findAll" resultType="user"> select * from user </select> </mapper>
-
UserMapper.java
package com.luoshen.mapper; import com.luoshen.pojo.User; import java.util.List; public interface UserMapper { List<User> findAll(); }
-
UserService.java
package com.luoshen.service; import com.luoshen.pojo.User; import java.util.List; public interface UserService { List<User> findAll(); }
-
UserServiceImpl.java
package com.luoshen.service; import com.luoshen.mapper.UserMapper; import com.luoshen.pojo.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class UserServiceImpl implements UserService { @Autowired private UserMapper userMapper; public List<User> findAll() { return userMapper.findAll(); } }
-
UserController.java
package com.luoshen.controller; import com.luoshen.pojo.User; import com.luoshen.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import java.util.List; @Controller @RequestMapping("index") public class UserController { @Autowired private UserService userService; @RequestMapping("find") public String findAll(Model model){ List<User> all = userService.findAll(); for (User user : all) { System.out.println(user); } model.addAttribute("all",all); return "user"; } }
代码使世界更精彩