SSM三大框架整合

2020-02-17 16:06:33来源:博客园 阅读 ()

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SSM三大框架整合

1、搭建整合环境

  SSM整合有多种方式,这里选择XML + 注解的方式,SSM三大框架使用版本:spring-webmvc5.0.2、spring5.0.2、mybatis3.4.5

  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(20,2)
);

  2.创建maven工程,定义pom.xml文件

    设置编译插件和Tomcat插件:

<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>
</properties>
<!-- 设置编译插件 -->
<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <version>3.1</version >
  <configuration>
    <source>${maven.compiler.source}</source>
    <target>${maven.compiler.target}</target>
    <encoding>${project.build.sourceEncoding}</encoding>
  </configuration>
</plugin>
<!-- 设置Tomcat插件 -->
<plugin>
  <groupId>org.apache.tomcat.maven</groupId>
  <artifactId>tomcat7-maven-plugin</artifactId>
  <version>2.2</version>
  <configuration>
  <path>/</path>
  <port>8080</port>
</configuration>
</plugin>

    锁定依赖版本:

<properties>
  <spring.version>5.0.2.RELEASE</spring.version>
  <springmvc.version>5.0.2.RELEASE</springmvc.version>
  <mybatis.version>3.4.5</mybatis.version>
</properties>
  <!--锁定依赖版本-->
  <dependencyManagement>
    <dependencies>
      <!-- Mybatis -->
      <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>${mybatis.version}</version>
      </dependency>
      <!-- springMVC -->
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${springmvc.version}</version>
      </dependency>
      <!-- spring -->
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</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-expression</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
        <scope>test</scope>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${spring.version}</version>
      </dependency>
    </dependencies>
  </dependencyManagement>

    添加依赖:

  <dependencies>
    <!-- Mybatis 和 mybatis 与 spring 的整合 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.1</version>
    </dependency>
    <!-- MySql 驱动 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.32</version>
    </dependency>
    <!-- druid 数据库连接池 -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.0.9</version>
    </dependency>
    <!-- springMVC 核心-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
    </dependency>
    <!-- spring 相关 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
    </dependency>
    <!-- junit 测试 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
    <!-- servlet -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>
    <!-- jsp -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>
    <!-- jstl -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
  </dependencies>

  3.持久层(如果使用注解方式开发,则只需要在接口方法上添加相应的注解,删除 mapper 映射文件,其他配置都不需要变)

    定义实体类:

/**
 * 账户实体类
 */
public class Account {
    private Integer id;
    private String name;
    private Double money;
    // get 和 set 方法
}

    dao 代码:

/**
 * 账户持久层接口
 */
public interface AccountDao {
    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    Account findById(Integer id);
}

    配置文件:在 src/main/resources 下创建

      使用xml开发,映射文件:AccountDao.xml

      要求名称和 dao 接口名一样,后面配置的 mapper 扫描器以此规则来扫描(放置在和dao接口相同的包路径下,方便管理)

<?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">
<mapper namespace="com.fgy.ssm.dao.AccountDao">
    <select id="findById" parameterType="int" resultType="account">
        select * from account where id = #{id}
    </select>
</mapper>

      创建 spring 配置文件:applicationContext.xml,把原本属于 mybatis 的配置文件内容交给 spring 来管理

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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-4.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
            http://www.springframework.org/schema/tx
            http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

    <!-- ================= dao层配置文件开始 ================= -->
    <!-- 数据库连接池 驱动,url,用户名,密码可以配置到别的文件中,方便修改 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <!-- 驱动 -->
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <!-- url -->
        <property name="url" value="jdbc:mysql://localhost:3306/ssm" />
        <!-- 用户名 -->
        <property name="username" value="root" />
        <!-- 密码 -->
        <property name="password" value="root" />
    </bean>

    <!-- mapper 配置 -->
    <!-- 让 spring 管理 sqlsessionFactory ,每次使用时创建 sqlSession ,使用mybatis和spring整合包中的类 -->
    <bean id="sqlSessionFactory"
          class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 数据库连接池 -->
        <property name="dataSource" ref="dataSource" />
        <!-- 给实体类起别名 -->
        <property name="typeAliasesPackage" value="com.fgy.ssm.domain"></property>
    </bean>
    <!-- mapper 扫描器 :用来产生代理对象 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 可以使用分号或逗号作为分隔符设置多于一个的包路径
             mapper 映射文件名称必须和 dao 接口名一样才能扫描 -->
        <property name="basePackage" value="com.fgy.ssm.dao"></property>
    </bean>
    <!-- ================= dao层配置文件结束 ================= -->

    <!-- ================= service层配置文件开始 ================= -->
    <!-- ================= service层配置文件结束 ================= -->
</beans>

      添加日志文件 log4j.properties

      .......................................

    测试持久层:

public class AccountDaoTest {
    @Test
    public void testFindById() {
        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        AccountDao accountDao = context.getBean(AccountDao.class);
        Account account = accountDao.findById(1);
        System.out.println(account);
    }
}

      也可以使用 spring 整合 junit 来测试,坐标在最开始时已经导入

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class AccountDaoTest {
    @Autowired
    private AccountDao accountDao;

    @Test
    public void testFindById() {
        Account account = accountDao.findById(1);
        System.out.println(account);
    }
}

  4.业务层

    dao 新增的方法:这里使用注解,不再使用 xml

/**
     * 根据名称查询账户信息
     * @param name
     * @return
     */
    @Select("select * from account where name = #{name}")
    Account findByName(String name);

    /**
     * 更新账户信息
     * @param account1
     */
    @Select("update account set name = #{name}, money = #{money} where id = #{id}")
    void update(Account account1);

    service 代码:

/**
 * 账户业务层接口
 */
public interface AccountService {

    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    Account findById(Integer id);

    /**
     * 用户1向用户2转账
     * @param user1
     * @param user2
     * @param money
     */
    void transfer(String user1, String user2, Double money);
}
/**
 * 账户业务层实现类
 */
@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountDao accountDao;

    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    @Override
    public Account findById(Integer id) {
        return accountDao.findById(id);
    }

    /**
     * 用户1向用户2转账
     * @param user1
     * @param user2
     * @param money
     */
    @Override
    public void transfer(String user1, String user2, Double money) {
        // 查询用户1
        Account account1 = accountDao.findByName(user1);
        // 查询用户2
        Account account2 = accountDao.findByName(user2);
        // 转账
        account1.setMoney(account1.getMoney() - money);
        account2.setMoney(account2.getMoney() + money);
        // 更新用户1
        accountDao.update(account1);

        // int i = 1/0;

        // 更新用户2
        accountDao.update(account2);
    }
}

    配置文件:在 applicationContext.xml 中添加

<!-- ================= service层配置文件开始 ================= -->
    <!-- 开启注解扫描(使用注解开发) -->
    <context:component-scan base-package="com.fgy.ssm.service.impl"/>

    <!-- 事务配置 -->
    <!-- 配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入数据源 -->
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 配置通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true" propagation="SUPPORTS"/>
            <tx:method name="*" read-only="false" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>
    <!-- 配置 aop -->
    <aop:config>
        <!-- 配置切入点表达式 -->
        <aop:pointcut id="pt" expression="execution(* com.fgy.ssm.service.impl.*.*(..))"/>
        <!-- 配置切入点表达式和事务通知的对应关系 -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"></aop:advisor>
    </aop:config>
    <!-- ================= service层配置文件结束 ================= -->

    测试业务层:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class AccountServiceTest {

    @Autowired
    private AccountService accountService;

    @Test
    public void testTransfer() {
        accountService.transfer("张三", "李四", 100.0);
    }
}

  表现层:

    controller 代码:

/**
 * 账户表现层
 */
@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService accountService;

    /**
     * 查询账户详情
     * @param model
     * @param id
     * @return
     */
    @RequestMapping("/findDetail/{id}")
    public String findDetail(Model model, @PathVariable(name = "id") Integer id) {
        Account account = accountService.findById(id);
        model.addAttribute("account", account);
        return "detail";
    }

    /**
     * 测试转账
     * @return
     */
    @RequestMapping("/transfer")
    public String transfer() {
        accountService.transfer("张三", "李四", 100.0);
        return "success";
    }
}

    新建 springmvc.xml 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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.2.xsd">

    <!-- 开启注解扫描 -->
    <context:component-scan base-package="com.fgy.ssm.controller"/>

    <!-- 处理器映射器、处理器适配器 -->
    <mvc:annotation-driven/>

    <!-- 静态资源不拦截 -->
    <mvc:default-servlet-handler/>

    <!-- 视图解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

    index.jsp 页面和 detail.jsp页面:

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>index</title>
</head>
<body>
    <a href="${pageContext.request.contextPath}/account/findDetail/1">查询详情</a> <br/>
    <a href="${pageContext.request.contextPath}/account/transfer">测试事务是否正常</a>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>detail</title>
</head>
<body>
    id:${account.id} <br/>
    name:${account.name} <br/>
    money:${account.money} <br/>
    <img src="${pageContext.request.contextPath}/images/test.jpg">测试静态文件是否放行
</body>
</html>

    配置 web.xml 文件:

<!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 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_3_0.xsd"
         version="3.0">

    <!-- 配置过滤器,解决中文乱码的问题 -->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!-- 指定字符集 -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <!-- forceEncoding=true意思是指无论客户端请求是否包含了编码,都用过滤器里的编码来解析请求 -->
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>false</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 配置 spring 核心监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- ContextLoaderListener 默认去WEB-INF下加载名称为applicationContext.xml文件
        重新指定配置文件的路径 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <!-- 配置 SpringMVC的核心控制器 -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 配置Servlet的初始化参数,读取springmvc的配置文件,创建spring容器
             如果不指定,默认读取 /WEB-INF/dispatcherServlet-servlet.xml文件 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!-- 配置servlet启动时加载对象,servlet默认发起请求时才创建,这里是加载配置文件,启动时就需要加载 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

    启动 Tomcat 测试:

    ..........................

最后:为什么不把 springMVC 的配置移到 spring 配置文件中呢?或者说把两个配置文件内容合在一起,只保留一个配置文件。

  参考博文:https://blog.csdn.net/f45056231p/article/details/81545964


原文链接:https://www.cnblogs.com/roadlandscape/p/12322748.html
如有疑问请与原作者联系

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