搭建整合环境

环境准备

1、创建数据库和表结构

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

2、创建maven工程

配置pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.hegong</groupId>
    <artifactId>SSM</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>SSM Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.9</maven.compiler.source>
        <maven.compiler.target>1.9</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>
        <!-- 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>

    <build>
        <finalName>SSM</finalName>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.1.0</version>
                </plugin>
                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.22.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

创建实体类

/**
 * @author 14767
 * 账户实体类
 * 因为web服务器通常将那些暂时不活动但未超时的HttpSession对象转移到文件系统或数据库中保存，所以需要序列化
 */
public class Account implements Serializable {
    private Integer id;
    private String name;
    private Double money;

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }

    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 Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }
}

编写dao接口

/**
 * @author 14767
 * 账户dao接口
 */
public interface AccountDao {
    /**
     * 查询所有
     * @return
     */
    public List<Account> findAll();

    /**
     * 保存账户信息
     * @param account
     */
    public void saveAccount(Account account);
    
}

编写service接口和实现类

接口

/**
 * @author 14767
 */
public interface AccountService {
    /**
     * 查询所有
     * @return
     */
    public List<Account> findAll();

    /**
     * 保存账户信息
     * @param account
     */
    public void saveAccount(Account account);
}

实现类

/**
 * @author 14767
 */
public class AccountServiceImpl implements AccountService {
    @Override
    public List<Account> findAll() {
        System.out.println("业务层：查询所有账户。。。");
        return null;
    }

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

    }
}

编写账户控制器

/**
 * @author 14767
 * 账户控制器
 */
public class AccountController {
}

Spring框架代码的编写

搭建和测试Spring的开发环境

1、在SSM项目中创建applicationContext.xml的配置文件，编写具体的配置信息

<?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">



    <!-- 开启注解扫描，要扫描的是service和dao层的注解，要忽略web层注解，因为web层让SpringMVC框架 去管理 -->
    <context:component-scan base-package="com.hegong">
        <!--配置哪些注解不扫描 -->
        <!--表示Controller注解修饰的类不扫描 -->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

2、在ssm项目中编写测试方法，进行测试

/**
 * @author 14767
 *
 */
public class SpringTest {
    @Test
    public void run(){
        //加载配置文件
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        AccountService as = (AccountService)ac.getBean("accountService");
        as.findAll();
    }
}

执行该测试代码会出现警告，因为我们没有引入log4j的配置文件

3、引入log4j配置文件

# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=info, CONSOLE, LOGFILE

# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE

# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

Spring整合SpringMVC框架

搭建和测试SpringMVC的开发环境

1、在web.xml中配置DispatcherServlet前端控制器、编码过滤器、

<!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>
  <!--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>
    <!--设置编码集 -->
    <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>
</web-app>

2、 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Controler注解 -->
    <context:component-scan base-package="com.hegong">
        <!--设置只扫描Controller注解 -->
        <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">
        <!--配置路径的前缀 -->
        <property name="prefix" value="/WEB-INF/pages"></property>
        <!--配置路径的后缀名 -->
        <property name="suffix" value=".jsp"></property>
    </bean>
    
    <!--配置过滤静态资源 -->
    <mvc:resources location="/css/" mapping="/css/**" /> 
    <mvc:resources location="/images/" mapping="/images/**" /> 
    <mvc:resources location="/js/" mapping="/js/**" />
    
    <!--配置开启SpringMVC注解的支持 -->
    <mvc:annotation-driven/>
    
</beans>

测试SpringMVC的框架搭建是否成功

1、编写index.jsp和list.jsp编写，超链接

index.jsp
在这里插入图片描述

list.jsp
在这里插入图片描述

2、给AccountController类，编写方法，进行测试

/**
 * @author 14767
 * 账户控制器
 */
@Controller
@RequestMapping("/account")
public class AccountController {
    @RequestMapping("/findAll")
    public String findAll(){
        System.out.println("表现层：查询所有账户信息。。。。");
        return "list";
    }
}

Spring整合SpringMVC的框架

现在如果我们想要从controller的方法中调用业务层的方法，那么我们需要业务层类的对象，这时候我们应该考虑使用依赖注入的方式来创建这个对象，但是如果我们使用spring的配置文件进行了该对象的依赖注入，会出现一个问题，我们的web 工程在启动的时候会先执行web.xml的配置文件，而该配置文件中的前端控制器只加载了springmvc.xml的配置文件，而该配置文件只扫描controller类的注解，也就是说serviec层的spring容器我们从始至终就没有创建过
我们如何解决这个问题呢？
我们可以使用servletContext域对象，因为该对象随着服务器的启动而创建，随着服务器的关闭而销毁
在这里插入图片描述
刚好可以帮助我们解决这个问题，我们可以使用监听器监听，该域对象，当这个域对象一被创建我们就加载spring的配置文件，这样我们在加载web.xml时前端控制器加载springmvc.xml中的controller的bean对象的时候里面注入的service就有值了，而不是空了

1、在项目启动的时候，就去加载applicationContext.xml的配置文件，在web.xml中配置监听器

ContextLoaderListener监听器（该监听器只能加载WEB-INF目录下的applicationContext.xml的配置文
件）。

<!--配置spring的监听器 ,默认只加载WEB-INF目录下的applicationContext.xml-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--设置配置文件的路径，因为配置文件在resources中部署到服务器上后再classes目录下，spring的监听器加载不到 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

2、在controller中注入service对象

/**
 * @author 14767
 * 账户控制器
 */
@Controller
@RequestMapping("/account")
public class AccountController {
    @Autowired
    private AccountService accountService;
    @RequestMapping("/findAll")
    public String findAll(){
        System.out.println("表现层：查询所有账户信息。。。。");
        accountService.findAll();
        return "list";
    }
}

Spring整合Mybatis框架

搭建和测试MyBatis的环境

1、在web项目中编写SqlMapConfig.xml的配置文件，编写核心配置文件

<?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>
    <!--配置环境 -->
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"></transactionManager>
            <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="123456"/>
            </dataSource>
        </environment>
    </environments>

    <!--引入映射配置文件 -->
    <mappers>
        <package name="com.hegong.dao"/>
    </mappers>
</configuration>

2、在AccountDao接口的方法上添加注解，编写SQL语句

/**
 * @author 14767
 * 账户dao接口
 */
public interface AccountDao {
    /**
     * 查询所有
     * @return
     */
    @Select("select * from account")
    public List<Account> findAll();

    /**
     * 保存账户信息
     * @param account
     */
    @Insert("insert into account (name,money) values (#{name},#{money}")
    public void saveAccount(Account account);

}

3、编写测试的方法

/**
 * @author 14767
 */
public class MybatisTest {
    /**
     * 测试查询所有方法
     * @throws Exception
     */
    @Test
    public void run1() throws Exception{
        //加载配置文件
        InputStream is = Resources.getResourceAsStream("SqlMapConfig.xml");
        //创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);
        //创建SqlSession对象
        SqlSession session = factory.openSession();
        //获取到代理对象
        AccountDao dao = session.getMapper(AccountDao.class);
        //查询所有账户信息
        List<Account> list = dao.findAll();
        for (Account account: list ) {
            System.out.println(account);

        }
        //释放资源
        session.close();
        is.close();
    }

    /**
     * 测试保存方法
     * @throws Exception
     */
    @Test
    public void run2() throws Exception{
        Account account = new Account();
        account.setName("lalal");
        account.setMoney(500d);
        //加载配置文件
        InputStream is = Resources.getResourceAsStream("SqlMapConfig.xml");
        //创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);
        //创建SqlSession对象
        SqlSession session = factory.openSession();
        //获取到代理对象
        AccountDao dao = session.getMapper(AccountDao.class);
        //查询所有账户信息
        dao.saveAccount(account);
        //提交事务
        session.commit();
        //释放资源
        session.close();
        is.close();
    }
}

Spring整合MyBatis框架

spring整合mybatis框架同样是将dao的实现类对象加载到spring的ioc容器中，然后再service中注入daod的实现类对象

1、给applicationContext.xml配置文件添加新的配置

目的：把SqlMapConfig.xml配置文件中的内容配applicationContext.xml配置文件中这样就可以不配置SqlMapConfig.xml了，
在applicationContext.xml配置文件中加入，如下配置

 <!--spring整合mybatis的框架 -->
    <!--配置连接池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///ssm"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123456"></property>
    </bean>
    <!--配置SqlSessionFactory工厂对象 -->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!--配置AccountDao接口所在包 -->
    <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.hegong.dao"></property>
    </bean>

添加如下配置之后就不用配置SqlMapConfig.xml了

2、在AccountDao接口中添加@Repository注解

3、 配置Spring的声明式事务管理

<!--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="dataSource"></property>
    </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:method>
        </tx:attributes>
    </tx:advice>
    <!--配置AOP增强 -->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.hegong.service.impl.*ServiceImpl.*(..))"></aop:advisor>
    </aop:config>

然后测试保存方法即可
在这里插入图片描述
在这里插入图片描述

posted @ 2021-01-28 14:21  谢海川  阅读(26)  评论(0)    收藏  举报