SpringMVC: End - 张天宇的博客

SpringMVC第三篇，SSM的整合。

环境搭建

数据库的准备

create database ssm;
use ssm;
create table account(
    id int primary key auto_increment,
    name varchar(20),
    money double
);

导入坐标

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>5.0.2.RELEASE</spring.version>
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
    <mysql.version>5.1.6</mysql.version>
    <mybatis.version>3.4.5</mybatis.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!-- 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>${spring.version}</version>
    </dependency>
    <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${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>
  </dependencies>

代码准备

实体类

public class Account implements Serializable {
    private Integer id;
    private String name;
    private Double money;
    //getter & setter
}

持久层

public interface IAccountDao {
    public List<Account> findAll();
    public void saveAccount(Account account);
}

业务层

public interface IAccountService {
    public List<Account> findAll();
    public void saveAccount(Account account);
}
public class AccountService implements IAccountService {
    @Override
    public List<Account> findAll() {
        System.out.println("业务层：输出所有");
        return null;
    }

    @Override
    public void saveAccount(Account account) {
        System.out.println("业务层：保存了");
    }
}

控制器
1
2
public class AccountController {
}

Spring搭建

编写Spring配置文件applicationContext.xml，并导入依赖。

<?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">
    <!-- 开启扫描，只处理Service和Dao，Controller交给SpringMVC处理 -->
    <context:component-scan base-package="top.tyzhang">
        <!-- 配置哪些不扫描 -->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

使用注解配置业务层。

@Service("accountService")
public class AccountService implements IAccountService {
    @Override
    public List<Account> findAll() {
        System.out.println("业务层：输出所有");
        return null;
    }
    //...
}

测试Spring是否能独立运行。

//加载Spring配置文件
ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
AccountService as = (AccountService) applicationContext.getBean("accountService");
as.findAll();

Spring整合SpringMVC

SpringMVC搭建

配置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>
<!--  前端控制器 -->
  <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>
<!--  解决中文乱码过滤器-->
  <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>
</web-app>

创建springmvc.xml的配置文件，编写配置文件。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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">
	<!--    开启注解扫描，只扫描Controller-->
    <context:component-scan base-package="top.tyzhang">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
	<!--    配置视图解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
	<!--    过滤静态资源-->
    <mvc:resources location="/css/" mapping="/css/**" />
    <mvc:resources location="/images/" mapping="/images/**" />
    <mvc:resources location="/js/" mapping="/js/**" />
	<!--    开启注解的支持-->
    <mvc:annotation-driven/>
</beans>

创建控制器类

@Controller
@RequestMapping("/account")
public class AccountController {
    @RequestMapping("/findAll")
    public String findAll(){
        System.out.println("表现层：查询所有信息");
        return "list";
    }
}

配置相应JSP文件，启动服务器测试。
1
<a href="account/findAll">查询所有</a>

整合

配置监听器实现启动服务创建容器。

<!-- 配置 spring 提供的监听器，用于启动服务时加载容器 。
该间监听器只能加载 WEB-INF 目录中名称为 applicationContext.xml 的配置文件 -->
<listener>
    <listener-class>
    org.springframework.web.context.ContextLoaderListener
    </listener-class>
</listener>
<!-- 手动指定 spring 配置文件位置 -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>

依赖注入

@Controller
@RequestMapping("/account")
public class AccountController {
    @Autowired
    private AccountService accountService;
    @RequestMapping("/findAll")
    public String findAll(){
        System.out.println("表现层：查询所有信息");
        accountService.findAll();
        return "list";
    }
}

Spring整合MyBatis

搭建测试MyBatis环境

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>
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///ssm"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>
    <!-- 使用的是注解 -->
    <mappers>
        <!-- <mapper class="top.tyzhang.dao.IAccountDao"/> -->
        <!-- 该包下所有的dao接口都可以使用 -->
        <package name="top.tyzhang.dao"/>
    </mappers>
</configuration>

Dao中编写SQL语句。

public interface IAccountDao {
    @Select("select * from account")
    public List<Account> findAll();
    @Insert("insert into account (name, money) values (#{name}, #{money})")
    public void saveAccount(Account account);
}

测试。

public class MyBaTest {
    @Test
    public void run() throws IOException {
        //加载mybatis配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
        //创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        //创建SqlSession对象
        SqlSession session = factory.openSession();
        //获取代理对象
        IAccountDao accountDao=session.getMapper(IAccountDao.class);
        System.out.println(accountDao.findAll().size());
        session.close();
        in.close();
    }
    @Test
    public void run2() throws IOException {
        Account account = new Account();
        account.setName("lala");
        account.setMoney(14.0);
        //加载mybatis配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
        //创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        //创建SqlSession对象
        SqlSession session = factory.openSession();
        //获取代理对象
        IAccountDao accountDao=session.getMapper(IAccountDao.class);
        accountDao.saveAccount(account);
        //提交事务
        session.commit();
        System.out.println(accountDao.findAll().size());
        session.close();
        in.close();
    }
}

整合

把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中并删除。

<?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">
    <!-- 开启扫描，只处理Service和Dao，Controller交给SpringMVC处理 -->
    <context:component-scan base-package="top.tyzhang">
        <!-- 配置哪些不扫描 -->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

	<!--    spring整合mybatis框架，就是把mybatis的配置文件交给spring-->
	<!--    配置连接池-->
    <bean id="dSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql:///ssm"/>
        <property name="user" value="root"/>
        <property name="password" value="root"/>
    </bean>
	<!--    配置工厂对象SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dSource"/>
    </bean>
	<!--    配置接口所在的包-->
    <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="top.tyzhang.dao"/>
    </bean>
</beans>

在IAccountDao接口中添加@Repository注解。

@Repository
public interface IAccountDao {
    @Select("select * from account")
    public List<Account> findAll();
    @Insert("insert into account (name, money) values (#{name}, #{money})")
    public void saveAccount(Account account);
}

在Service中注入Dao对象。

@Service("accountService")
public class AccountService implements IAccountService {
    @Autowired
    private IAccountDao iAccountDao;
    @Override
    public List<Account> findAll() {
        System.out.println("业务层：输出所有");
        return iAccountDao.findAll();
    }

    @Override
    public void saveAccount(Account account) {
        System.out.println("业务层：保存了");
        iAccountDao.saveAccount(account);
    }
}

Controller中注入Service。

@Controller
@RequestMapping("/account")
public class AccountController {
    @Autowired
    private AccountService accountService;
    @RequestMapping("/findAll")
    public String findAll(Model model){
        System.out.println("表现层：查询所有信息");
        List<Account> accountList = accountService.findAll();
        model.addAttribute("list",accountList);
        return "list";
    }
}

截止到现在，增删查还没有提交事务的操作，需要在applicationContext.xml进行声明式事务管理。

<!--    配置声明式事务管理-->
<!--配置事务管理器    -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dSource"/>
    </bean>
<!--    配置事务通知-->
    <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:advisor advice-ref="txAdvice" pointcut="execution(* top.tyzhang.service.impl.*Service.*(..))"/>
    </aop:config>

控制器

@RequestMapping("/save")
public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
	System.out.println("表现层：保存");
    accountService.saveAccount(account);
    response.sendRedirect(request.getContextPath()+"/user/findAll");
    return;
}