SSM（Spring+SpringMVC+Mybatis）整合
1、导包
项目结构如下
2、配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<!-- 配置Spring IOC容器的Listener -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 配置DispatcherServlet -->
<servlet>
<servlet-name>springDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 实际上也可以不使用contextConfigLocation来配置springMVC的配置文件
而使用默认的，默认的配置文件为：/WEB-INF/<servlet-name>-servlet.xml
-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
3、配置springmvc.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"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 配置自动扫描的包 -->
<context:component-scan base-package="controller" use-default-filters="false">
<!-- 只扫描标有Controller注解的类 -->
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!-- 处理静态资源 -->
<mvc:default-servlet-handler/>
<mvc:annotation-driven></mvc:annotation-driven>
</beans>
4、配置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"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
<!-- 配置自动扫描的包 -->
<context:component-scan base-package="service">
<!-- 扫描除了标有Controller注解的类 -->
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 导入配置文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="${jdbc.user}"></property>
<property name="password" value=""></property>
<property name="driverClass" value="${jdbc.driverClass}"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?serverTimezone=UTC&characterEncoding=utf8"></property>
<property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
</bean>
<!-- 声明事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 开启注解事务 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<!-- 创建SqlsessionFactory对象 -->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<!-- 指定全局配置文件的位置 -->
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<!-- 指定mapper文件的位置 -->
<property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"></property>
</bean>
<!--
扫描所有的mapper接口的实现，让这些mapper能够自动注入
base-package：指定mapper接口的包名
-->
<mybatis-spring:scan base-package="dao"/>
</beans>
db.properties
jdbc.user=root
jdbc.password=
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/test
jdbc.initPoolSize=5
jdbc.maxPoolSize=10
5、测试(从数据库中查询所有员工)
Employee.java实体类
public class Employee implements Serializable {
private Integer id;
private String name;
private String sex;
private String email;
public Employee() {
super();
}
public Employee(Integer id, String name, String sex, String email) {
super();
this.id = id;
this.name = name;
this.sex = sex;
this.email = email;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "Employee [id=" + id + ", name=" + name + ", sex=" + sex + ", email=" + email + "]";
}
}
EmployeeMapper.java接口
public interface EmployeeMapper {
//查询所有员工的接口方法
public List<Employee> getEmps();
}
EmployeeService.java
@Service
public class EmployeeService {
@Autowired
private EmployeeMapper employeeMapper;
public List<Employee> getEmps(){
return employeeMapper.getEmps();
}
}
EmployeeController.java
@Controller
public class EmployeeController {
@Autowired
private EmployeeService employeeService;
@RequestMapping("/getEmps")
public String getEmps(Map<String, Object> map){
List<Employee> emps = employeeService.getEmps();
map.put("allEmps", emps);
return "list";
}
}
EmployeeMapper.xml配置文件
<?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="dao.EmployeeMapper">
<!-- namespace指定所对应的接口的全路径 -->
<!-- public List<Employee> getEmps() -->
<select id="getEmps" resultType="entity.Employee">
select * from employee;
</select>
</mapper>
index.jsp
<a href="getEmps">查询所有员工</a>
list.jsp
<h3>员工列表</h3>
<table>
<tr>
<td>员工号</td>
<td>姓名</td>
<td>性别</td>
<td>email</td>
</tr>
<c:forEach items="${allEmps }" var="emp">
<tr>
<td>${emp.id }</td>
<td>${emp.name }</td>
<td>${emp.sex }</td>
<td>${emp.email }</td>
</tr>
</c:forEach>
</table>
测试结果
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