SSM整合詳解
一、基本概念
1.一、Spring
Spring是一個開源框架，Spring是於2003 年興起的一個輕量級的Java 開發框架，由Rod Johnson 在其著做Expert One-On-One J2EE Development and Design中闡述的部分理念和原型衍生而來。它是爲了解決企業應用開發的複雜性而建立的。Spring使用基本的JavaBean來完成之前只可能由EJB完成的事情。然而，Spring的用途不只限於服務器端的開發。從簡單性、可測試性和鬆耦合的角度而言，任何Java應用均可以從Spring中受益。 簡單來講，Spring是一個輕量級的控制反轉（IoC）和麪向切面（AOP）的容器框架。html
1.二、SpringMVC
Spring MVC屬於SpringFrameWork的後續產品，已經融合在Spring Web Flow裏面。Spring MVC 分離了控制器、模型對象、分派器以及處理程序對象的角色，這種分離讓它們更容易進行定製。java
1.三、Mybatis
MyBatis 本是apache的一個開源項目iBatis, 2010年這個項目由apache software foundation 遷移到了google code，而且更名爲MyBatis 。MyBatis是一個基於Java的持久層框架。iBATIS提供的持久層框架包括SQL Maps和Data Access Objects（DAO）MyBatis 消除了幾乎全部的JDBC代碼和參數的手工設置以及結果集的檢索。MyBatis 使用簡單的 XML或註解用於配置和原始映射，將接口和 Java 的POJOs（Plain Old Java Objects，普通的 Java對象）映射成數據庫中的記錄。mysql
二、操做流程
一、創建Maven工程
二、導入座標創建依賴
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<dependencies>
<!--Junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!--數據庫驅動-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.17</version>
</dependency>
<!-- 數據庫鏈接池 -->
<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>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
</dependencies>
<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>
</project>
三、編寫實體類
@Data
@AllArgsConstructor
@NoArgsConstructor
@Setter
@Getter
@ToString
public class User implements Serializable {
private Integer id;
private String username;
private String sex;
private String address;
}
四、編寫持久層
public interface UserDao {
/**
* 查詢全部用戶信息
* */
List<User> findAll();
/**
* 增長用戶
* */
void create(User user);
}
五、編寫業務層接口
public interface UserService {
/**
* 查詢全部用戶信息
* */
List<User> findAll();
/**
* 增長用戶
* */
void create(User user);
}
六、編寫業務層接口實現
public class UserServiceImpl implements UserService {
@Override
public List<User> findAll() {
System.out.println("查詢全部用戶");
return null;
}
@Override
public void create(User user) {
System.out.println("增長一個用戶信息");
}
}
##七、編寫控制層
```java
public class UserController {
}
SSM整合
一、Spring相關配置
Spring.xml配置表頭git
<?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"
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/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">
</beans>
Spring的相關配置web
<?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"
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/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">
<!--開啓註解掃描-->
<context:component-scan base-package="com.xiaohe">
<!--<context:include-filter type="" expression=""/>-->
<!--排除Controller註解，不須要掃描的這類-->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>
業務了邏輯層實現類代碼spring
@Service(value = "userService")
public class UserServiceImpl implements UserService {
@Override
public List<User> findAll() {
System.out.println("查詢全部用戶");
return null;
}
##一、SpringMVC配置
@Override
public void create(User user) {
System.out.println("增長一個用戶信息");
}
}
測試Spring配置是否成功,新建一個測試Demosql
@Test
public void testSpring(){
//獲取spring容器
ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
UserServiceImpl userService = context.getBean("userService", UserServiceImpl.class);
userService.findAll();
}
}
控制檯輸出
成功數據庫
二、SpringMVC相關配置
Web.xml配置express
<?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>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!--必定要注意:咱們這裏加載的是總的配置文件，以前被這裏坑了！-->
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--encodingFilter-->
<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過時時間-->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
配置SpringMVC配置文件相關約束apache
<?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">
</beans>
Springmvc相關配置
<?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">
<!--掃描Controller相關注解-->
<context:component-scan base-package="com.xiaohe">
<!--表示只掃描Controller註解-->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--配置視圖解析器-->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--配置前綴-->
<property name="prefix" value="/WEB-INF/jsp/"></property>
<!--配置後綴-->
<property name="suffix" value=".jsp"></property>
</bean>
<!--設置靜態代碼不過濾-->
<mvc:default-servlet-handler/>
<!--開啓Spring註解支持-->
<mvc:annotation-driven />
</beans>
controller配置
@Controller
@RequestMapping("/user")
public class UserController {
//查詢全部的用戶信息
@RequestMapping("/findAll")
public String findAll(){
System.out.println("查詢到全部的用戶列表");
return "userList";
}
}
index.jsp
<html> <body> <a href="/user/findAll">UserList</a> </body> </html>
userList.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>用戶列表頁面</title>
</head>
<body>
<h1>UserList</h1>
</body>
</html>
測試
成功
三、Spring-SpringMVC整合
在Web.xml裏面添加監聽器
<!--配置Spring監聽器-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
四、Spring-mybbatis整合
配置Mybatis-config
mybatis--config的頭部信息
<?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">
mybatis-config配置
<?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>
<!--配置數據庫環境-->
<environments default="mysql">
<environment id="mysql">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
</environment>
</environments>
<!--配置映射文件-->
<!--使用註解-->
<mappers>
<package name="com.xiaohe.dao"/>
</mappers>
</configuration>
編寫測試類
@Test
public void testMybatis() throws IOException {
//加載配置文件
InputStream inputStream = Resources.getResourceAsStream("mybatis-config.xml");
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
SqlSession sqlSession = sqlSessionFactory.openSession();
UserDao userDao = sqlSession.getMapper(UserDao.class);
List<User> user = userDao.findAll();
for (User user1 : user) {
System.out.println(user1);
}
sqlSession.close();
}
}
結果
成功
Spring整合Mybatis
在spring.xml添加
<!--配置session工廠-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--掃描dao接口-->
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.xiaohe.dao"/>
</bean>
測試成功
至此爲止SSM整合完成
補充事務
在Spring.xml添加
<!--配置事務管理器-->
<!--配置事務通知-->
<tx:advice id="txAdvice" transaction-manager="dataSourceTransactionManager">
<tx:attributes>
<!--select方法-->
<tx:method name="find" read-only="true"/>
<tx:method name="*" isolation="DEFAULT"/>
</tx:attributes>
</tx:advice>
<!--配置AOP相關加強-->
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.xiaohe.service.impl.*ServiceImpl(..))"></aop:advisor>
</aop:config>
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相關文章
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