ssm整合说明

spring+springmvc+mybatis，称为ssm。ssm可以说是后端程序员必备技能，应该也是目前用得最多的，所以无论如何都要掌握

一、项目环境搭建:

1. 新建maven项目

2. 创建项目目录结构

3. 添加依赖

<properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target><spring.version>5.2.9.RELEASE</spring.version><slf4j.version>1.6.6</slf4j.version><log4j.version>1.2.12</log4j.version><mysql.version>8.0.19</mysql.version><mybatis.version>3.4.5</mybatis.version></properties><dependencies><!-- spring --><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.6.8</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.0</version><scope>provided</scope></dependency><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!-- log start --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>${log4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>${slf4j.version}</version></dependency><!-- log end --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.0</version></dependency><!--  <dependency><groupId>c3p0</groupId><artifactId>c3p0</artifactId><version>0.9.1.2</version><type>jar</type><scope>compile</scope></dependency>--><!--使用 c3p0 0.9.1.2 构建数据库连接池 不兼容的话可以换成 0.9.5.2--><dependency><groupId>com.mchange</groupId><artifactId>c3p0</artifactId><version>0.9.5.2</version><type>jar</type><scope>compile</scope></dependency></dependencies>

4.完成各项配置

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:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/aophttps://www.springframework.org/schema/aop/spring-aop.xsd"><!--使用注解方式进行创建对象1.开启注解扫描含义:开启注解扫描,指定了 base-package 扫描指定的包,扫描包与子包中所有的类查看类上是否有指定的注解, 如果类上有指定的注解,那么就创建给类对象,放到spring容器中--><!--   设置扫描包，包下设置注解@Service @Repository @Component @AutoWried--><context:component-scan base-package="com.qst"><!--    由于springmvc的controller是由springmvc来扫描，需要将controller排除在外--><context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/></context:component-scan><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="driverClass" value="com.mysql.cj.jdbc.Driver"/><property name="jdbcUrl"value="jdbc:mysql://localhost:3306/ssm?serverTimezone=GMT%2B8&amp;useUnicode=true&amp;characterEncoding=UTF-8"/><property name="user" value="root"/><property name="password" value="123456"/></bean><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"/><property name="typeAliasesPackage" value="com.qst.bean"/></bean><bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.qst.dao"/><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/></bean><!--配置Spring框架声明式事务管理--><!--配置事务管理器--><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="find*" read-only="true"/><tx:method name="*" isolation="DEFAULT" /></tx:attributes></tx:advice><!--配置AOP增强--><aop:config><aop:pointcut id="service" expression="execution(* com.qst.service.impl.*ServiceImpl.*(..))"/><aop:advisor advice-ref="txAdvice" pointcut-ref="service"/></aop:config></beans>

springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!--springmvc是web层  UserController  @Controller --><!-- 打开组件扫描--><context:component-scan base-package="com.qst"><!-- 只处理带@Controller的请求--><context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/></context:component-scan><!--配置的视图解析器对象 /page/success.jsp --><bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/pages/"/><property name="suffix" value=".jsp"/></bean><!--过滤静态资源   .js .css png--><mvc:resources mapping="/css/**" location="/css/"/><mvc:resources mapping="/images/**" location="/images/"/><mvc:resources mapping="/js/**" location="/js/" /><!--开启SpringMVC注解的支持 @RequestMapping @RequestBody @ResponseBody--><mvc:annotation-driven/>
</beans>

web.xml

<!DOCTYPE web-app PUBLIC"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN""http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app><display-name>Archetype Created Web Application</display-name><!--设置配置文件的路径  service dao--><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></context-param><!--解决中文乱码的过滤器--><filter><filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!--配置Spring的监听器，默认只加载WEB-INF目录下的applicationContext.xml配置文件--><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!--配置前端控制器  controller--><servlet><servlet-name>dispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!--加载springmvc.xml配置文件--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param><!--启动服务器，创建该servlet--><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping>
</web-app>

####5. 测试

TestPersonService

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class TestPersonService {private static  final Logger log=Logger.getLogger(TestPersonService.class.getName());@AutowiredIPersonService personService;@Testpublic void test01(){log.info(personService+"");List<Person> list=personService.findAll();log.info(list+"");Person person=new Person("jack",100.00);personService.savePerson(person);List<Person> list1=personService.findAll();log.info(list1+"");}@Testpublic void test03(){List<Person> personList = new ArrayList<>();personList.add(new Person("jack",100.00));personList.add(new Person("rose",200.00));personList.add(new Person("tony",300.00));personService.savePersons(personList);}}

TestDataSource

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class TestDataSource {private static final Logger log = Logger.getLogger(TestDataSource.class.getName());@Qualifier("IPersonDao")@AutowiredIPersonDao dao;@Testpublic void test01() throws SQLException {List<Person> data = dao.findAll();System.out.println(data);}@Testpublic void test02() throws SQLException {Person p =  new Person("hello",200.00);dao.save(p);}}

Person

public class Person {private  int id;private String name;private double money;

PersonController

@Controller
@RequestMapping("/person")
public class PersonController {@Autowiredprivate IPersonService personService;@RequestMapping(path="/list",method = RequestMethod.GET)public String list(Model model){//显示所有的person数据List<Person> list = personService.findAll();System.out.println("list() list= "+list);//数据放在Model对象，由Model传给页面model.addAttribute("list",list);//参1 key  参2 valuereturn "list";}
}

IPersonDao

public interface IPersonDao {List<Person>  findAll();void save(Person person);
}

public interface IPersonService {public List<Person> findAll() ;public void savePerson(Person person) ;public void savePersons(List<Person> list);
}

PersonService

@Service
public class PersonService implements IPersonService {@Qualifier("IPersonDao")@AutowiredIPersonDao personDao;@Overridepublic List<Person> findAll() {List<Person> list=  personDao.findAll();return list;}@Overridepublic void savePerson(Person person) {personDao.save(person);}public void savePersons(List<Person> list) {for(int i=0;i<list.size();i++){if(i==2)System.out.println(1/0);personDao.save(list.get(i));}}}