SSM搭建詳解
第一步驟:保證spring的Ioc獨立運行
導入依賴
<!--spring和springmvc座標-->
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<!--spring整合mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<!--導入德魯伊數據源-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.9</version>
</dependency>
<!--導入junit測試座標-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!--spring整合junit-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
<!--jstl-->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--servlet-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<!--jsp-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
</dependency>
<!--解析切入點表達式的座標-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.13</version>
</dependency>
<!--事務的座標-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.0.4.RELEASE</version>
</dependency>
</dependencies>
編寫業務層代碼
Service接口
public interface CompanyService {
//查詢所有
List<Company> findAll();
//根據id查詢
Company findById(String id);
//更新
void update(Company company);
}
ServiceImpl實現類
@Service
public class CompanyServiceImpl implements CompanyService {
private CompanyDao companyDao;
public List<Company> findAll() {
System.out.println("執行了查詢所有的方法");
return null;
}
public Company findById(String id) {
return null;
}
public void update(Company company) {
}
}
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 http://www.springframework.org/schema/context/spring-context.xsd">
<!--配置spring容器要掃描的包-->
<context:component-scan base-package="包名.....">
<!--排除Controller註解-->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>
</beans>
測試保證spring的IOC獨立運行
public class Test01SpringIoc {
public static void main(String[] args) {
ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
CompanyService serviceImpl = applicationContext.getBean("companyServiceImpl",CompanyService.class);
System.out.println(serviceImpl.findAll());
}
}
結果
[外鏈圖片轉存失敗(img-vub6kYlh-1569163462217)(D:\Zone\CSDN\TimeFriends\九月\9月8日\springIOC.png)]
第二步保證Mybatis獨立運行
創建mybatis的配置文件
SqlMapConfig.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>
<!--引入properties文件-->
<properties resource="jdbc.properties">
</properties>
<!--配置環境-->
<environments default="mysql">
<environment id="mysql">
<transactionManager type="JDBC"></transactionManager>
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</dataSource>
</environment>
</environments>
<!--指定映射文件的位置-->
<mappers>
<package name="com.itheima.dao"></package>
</mappers>
</configuration>
jdbc.properties配置文件
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/company_e88
jdbc.username=root
jdbc.password=root
CompanyDao.xml映射文件
<?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">
<!--命名空間操作的是哪個dao-->
<mapper namespace="com.itheima.dao.CompanyDao">
<!--配置數據庫列名和實體類名稱的對應關係-->
<resultMap id="companyMap" type="com.itheima.dao.CompanyDao">
<id column="id" property="id"></id>
<result column="name" property="name"></result>
<result column="expiration_date" property="expirationDate"></result>
<result column="address" property="address"></result>
<result column="license_id" property="licenseId"></result>
<result column="representative" property="representative"></result>
<result column="phone" property="phone"></result>
<result column="company_size" property="companySize"></result>
<result column="industry" property="industry"></result>
<result column="remarks" property="remarks"></result>
<result column="state" property="state"></result>
<result column="balance" property="balance"></result>
<result column="city" property="city"></result>
</resultMap>
<!--配置查詢所有-->
<select id="findAll" resultMap="companyMap">
select * from ss_company;
</select>
<!--配置根據id查詢-->
<select id="findById" resultMap="companyMap" parameterType="java.lang.String" >
select * FROM ss_company where id=#{id}
</select>
<!--配置更新-->
<update id="update" parameterType="com.itheima.domain.Company">
update ss_company set
`name`=#{name},
expiration_date=#{expirationDate},
address=#{address},
license_id=#{licenseId},
representative=#{representative},
phone=#{phone},
company_size=#{companySize},
industry=#{industry},
remarks=#{remarks},
state=#{state},
balance=#{balance},
city=#{city}
WHERE id=#{id}
</update>
</mapper>
編寫測試類:
public class Test02Mybatis {
public static void main(String[] args) throws IOException {
//1.讀取主配置文件
InputStream stream = Resources.getResourceAsStream("SqlMapConfig.xml");
//2.創建構建者對象
SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
//3.構建sqlSessionFactory
SqlSessionFactory factory = builder.build(stream);
//4.創建sqlSession
SqlSession sqlSession = factory.openSession();
//5.創建dao接口的代理實現類
CompanyDao proxyMapper = sqlSession.getMapper(CompanyDao.class);
//6.執行dao的方法
Company company = proxyMapper.findById("2");
System.out.println(company);
//7.釋放資源
sqlSession.close();
stream.close();
}
}
第三步整合spring和mybatis
思路:spring接管SqlSessionFactory的創建,以及dao接口的代理實現類的創建
在applicationContext.xml中
<?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 http://www.springframework.org/schema/context/spring-context.xsd">
<!--配置spring容器要掃描的包-->
<context:component-scan base-package="com.itheima">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>
<!----------------------------------------------------------------------------->
<!--整合spring和mybatis-->
<!--指定properties文件的位置-->
<context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>
<!--配置sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入數據源操作數據庫-->
<property name="dataSource" ref="dataSource">
</property>
</bean>
<!--配置數據源-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>
<!--自動創建dao接口的代理實現類並且存入Ioc容器-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.itheima.dao"></property>
</bean>
</beans>
第四步保證spring事務的正常使用
在applicationContext.xml中配置事務
<?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 http://www.springframework.org/schema/context/spring-context.xsd">
<!--配置spring容器要掃描的包-->
<context:component-scan base-package="com.itheima">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>
<!----------------------------------------------------------------------------->
<!--整合spring和mybatis-->
<!--指定properties文件的位置-->
<context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>
<!--配置sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入數據源操作數據庫-->
<property name="dataSource" ref="dataSource">
</property>
</bean>
<!--配置數據源-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.driver}"></property>
<property name="url" value="${jdbc.url}"></property>
<property name="username" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>
<!--自動創建dao接口的代理實現類並且存入Ioc容器-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.itheima.dao"></property>
</bean>
<!----------------------------------------------------------------------------->
<!--配置事務-->
<!--配置事務管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--配置事務的通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<!--配置事務的屬性-->
<tx:attributes>
<tx:method name="*" read-only="false" propagation="REQUIRED"/>
<tx:method name="find*" read-only="true" propagation="SUPPORTS"></tx:method>
</tx:attributes>
</tx:advice>
<!--配置aop-->
<aop:config>
<!--配置切入點:.*.*(..) 任意類下的任意方法的有無返回值都可-->
<aop:pointcut id="pt1" expression="execution(* com.itheima.service.impl.*.*(..))"></aop:pointcut>
<!--建立切入點表達式和事務通知的關係-->
<aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"></aop:advisor>
</aop:config>
</beans>
在service實現類中加入註解@Autowried注入dao
@Autowired
private CompanyDao companyDao;
測試spring和mybatis的整合結果
/**
* 測試spring和mybatis的整合結果
*/
/*創建容器*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class Test03SpringMybatis {
@Autowired
private CompanyService companyService;
@Test
public void testFindAll(){
List<Company> companyList = companyService.findAll();
for (Company company : companyList) {
System.out.println(company);
}
}
@Test
public void testUpdate(){
Company company = companyService.findById("2");
company.setExpirationDate(new Date());
companyService.update(company);
}
}
第五步保證springMvc的獨立運行
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<!--配置前端控制器-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--配置servlet的初始化參數,指定springmvc配置文件的位置-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!--配置servlet啓動時候就創建-->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<!--*.do與/的區別:/訪問靜態資源的時候需要配置mvc:resources-->
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<!--配置字符集過濾器,過濾器的生命週期是項目啓動-->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!--配置過濾器的初始化參數,指定使用的字符集-->
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<!--攔截過濾當前項目下的所有資源-->
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
springmvc.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!--配置springmvc創建容器時掃描的包-->
<context:component-scan base-package="com.itheima.controller"></context:component-scan>
<!--配置視圖解析器-->
<bean id="ViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--開啓springmvc的註解支持-->
<mvc:annotation-driven></mvc:annotation-driven>
</beans>
Controller層
@Controller
@RequestMapping("/company")
public class CompanyController {
//沒有注入是因爲這一步驟是保證springmvc的獨立運行
private CompanyService companyService;
/**
* 配置查詢所有
* @return
*/
@RequestMapping("/list")
public String findAll(){
System.out.println("執行了查詢所有");
return "";
}
}
在web.xml中配置監聽器(監聽項目啓動的時候就創建容器解決注入不進去的問題)
CompanyController類
注意:update需要重定向,如果請求轉發那麼地址欄不會發生變化,刷新會導致再次更新.所以update需要重定向.
@Controller
@RequestMapping("/company")
public class CompanyController {
@Autowired
private CompanyService companyService;
/**
* 配置查詢所有
* @return
*/
@RequestMapping("/list")
public String findAll(HttpServletRequest request){
List<Company> companyList = companyService.findAll();
//存到請求域中
request.setAttribute("list",companyList);
//轉發到列表頁面
return "company-list";
}
/**
* 前往更新頁面,根據id查詢
* @return
*/
@RequestMapping("/toUpdate")
public String toUpdate(String id,HttpServletRequest request){
Company company = companyService.findById(id);
//存入到請求域中
request.setAttribute("company",company);
companyService.update(company);
return "company-update";
}
@RequestMapping("/edit")
public String edit(Company company){
companyService.update(company);
//重定向到列表頁面
return "redirect:/company/list.do";
}
}
}
/**
* 前往更新頁面,根據id查詢
* @return
*/
@RequestMapping("/toUpdate")
public String toUpdate(String id,HttpServletRequest request){
Company company = companyService.findById(id);
//存入到請求域中
request.setAttribute("company",company);
companyService.update(company);
return "company-update";
}
@RequestMapping("/edit")
public String edit(Company company){
companyService.update(company);
//重定向到列表頁面
return "redirect:/company/list.do";
}
}