SSM环境搭建——简单实现SSM整合

一、项目架构



一、导入相关jar包

Jar包：链接：http://pan.baidu.com/s/1boGIG2N 密码：1wh8

二、配置相关信息

Bean：对应

public class User {
private int id;
private String username;
private String password;
}

jdbc.properties:

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/hgjs
username=root
password=123456

web.xml:

<!-- Spring配置文件开始 -->
<!-- 加载Spring容器配置 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- Spring和mybatis的配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>
</context-param>
<!-- Spring配置文件结束 -->

<!-- SpringMVC配置文件开始 -->
<!-- 添加对SpringMVC的支持 -->
<!-- 配置核心控制器，拦截匹配的请求，分发到具体的控制器，完成公共功能。 -->
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 指定Spring容器初始化配置文件路径 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<!-- DispatcherServlet初始化比较耗时，所以在tomcat容器启动的时候就对这个Servlet进行初始化 DispatcherServlet初始化的时候，会自动初始化Spring容器。那Spring容器初始化的时候就需要配置文件
默认的配置文件查找的是/WEB-INF/<servlet-name>-servlet.xml -->
<load-on-startup>1</load-on-startup>
<!-- 异步处理功能 1.使用asyncSupported=true必须运用tomcat7+JDK6以上版本。 2.必须在一个请求涉及的所有Servlet及Filter中都声明asyncSupported=true。 -->
<!-- <async-supported>true</async-supported> -->
</servlet>

<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>*.do</url-pattern>

</servlet-mapping>

spring-mybatis.xml:

<!-- 自动扫描 -->
<context:component-scan base-package="org.zl" />

<!-- ************************************************************************************************** -->

<!-- 引入配置文件 -->
<bean
class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties" />
</bean>
<!-- 配置数据源 -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driverClassName}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
</bean>

<!-- ************************************************************************************************** -->

<!-- 事务管理 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 使用声明式事务 transaction-manager：引用上面定义的事务管理器 -->
<tx:annotation-driven transaction-manager="transactionManager" />

<!-- ************************************************************************************************** -->

<!-- 配置mybatis的sqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- mybatis配置文件 -->
<!-- <property name="configLocation" value="classpath:mybatis-config.xml" /> -->
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:mapper/*.xml" />
</bean>

<!-- DAO接口所在包名，Spring会自动查找其下的类 ,包下的类需要使用@MapperScan注解,否则容器注入会失败 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 给出需要扫描Dao接口包 -->
<property name="basePackage" value="org.zl.dao" />
<!-- 注入sqlSessionFactory 这句话可写可不写，因为spring会去自动查找并注入 -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>

spring-mvc.xml:

<context:component-scan base-package="org.zl.controller" />

<!-- 视图解析器 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- <property name="prefix" value="/console/"/> -->
<property name="prefix" value="/" />
<property name="suffix" value=".jsp" />
</bean>

Dao:

@Repository("userDAO")
public interface UserDAO {
public User getUserById(int id);
}

mapper:

<mapper namespace="org.zl.dao.UserDAO">
<!-- public User getUserById(int id); -->
<select id="getUserById" resultType="org.zl.bean.User">
select * from user
where
id = #{id}
</select>
</mapper>

service:

public interface IUserService {
public User getUserById(int id);
}

servicelmpl:

@Service
public class UserServiceImpl implements IUserService {

@Resource
private UserDAO userDAO;

public User getUserById(int id) {
return userDAO.getUserById(id);
}
}

三、测试

UserTest:

public class UserTest {
private static UserDAO userDAO;

public static void main(String[] args) {
//加载容器
ApplicationContext context = new ClassPathXmlApplicationContext("classpath:spring-mybatis.xml");
//bean的名字与接口名相同但首字母小写
userDAO = (UserDAO) context.getBean("userDAO");
User user = userDAO.getUserById(1);
System.out.println(user.getUsername() +"****"+user.getPassword()+"***"+user.getId());
}
}

Controller:

@Controller
public class UserController {
@Resource
private IUserService iUserService;

@RequestMapping("/userid.do")
public String getUserId(HttpServletRequest request, Model model) {
int id = Integer.parseInt(request.getParameter("id"));

User user = this.iUserService.getUserById(id);
model.addAttribute("user", user);
System.out.println(user.getUsername() + ":" + user.getId() + "!!!");
return "login";
}
}

jsp:  UserTest.jsp

<form action="userid.do" method="post">
id:<input type="text" name="id"/><br/>
<input type="submit" value="提交"><br>
</form>

jsp:Login.jsp

<body>
SSM整合成功
</body>