SSM框架整合步骤

一、整合思路

​ 1、创建Maven工程并使用webapp骨架

​ 2、搭建Spring框架

​ 3、搭建Springmvc框架，并使用Spring整合Springmvc

​ 4、搭建MyBatis框架，并使用Spring整合MyBatis

二、创建Spring框架

1、pom.xml修改及依赖注入

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <!--编译Maven工程的JDK版本-->
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <!--锁定spring的版本-->
    <spring.version>5.0.2.RELEASE</spring.version>
    <slf4j.version>1.6.6</slf4j.version>
    <!--日志-->
    <log4j.version>1.2.12</log4j.version>
    <!--mysql版本-->
    <mysql.version>5.1.6</mysql.version>
    <!--mybatis版本-->
    <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>

2、创建用户表及javabean

​ 数据库创建如下：

CREATE DATABASE esp8266;
USE esp8266;
CREATE TABLE USER(
    id INT PRIMARY KEY AUTO_INCREMENT,
	NAME VARCHAR(20),
	PASSWORD VARCHAR(30)
);

​ Javabean创建如下：

package cn.njut.domain;

/**
 * @author Bijiaqin
 * @date 2019/6/28 10:56
 */
public class User {
    private Integer id;
    private String username;
    private String password;

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

3、创建接口类和实现类

​ 编写UserDao.java和UserService.java接口类,Dao接口无需编写实现类，Service接口需要手动编写实现类

/**
 * 用户Dao接口，无需编写实现类
 * @author Bijiaqin
 * @date 2019/6/28 11:06
 */
public interface UserDao {
    //查询用户，可用作登陆
    public List<User> findUser();
    //注册用户，此项目无需实现
    public void registerUser(User user);
}

/**
 * service接口需要手动编写实现类
 * @author Bijiaqin
 * @date 2019/6/28 11:12
 */
public interface UserService {
    //查询用户，可用作登陆
    public List<User> findUser();
    //注册用户，此项目无需实现
    public void registerUser(User user);
}

/**
 * 业务层：实现对用户的操作，增删改查等，实现service接口功能
 * @author Bijiaqin
 * @date 2019/6/28 11:15
 */
public class UserServiceImpl implements UserService {
    @Override
    public List<User> findUser() {
        return null;
    }
    @Override
    public void registerUser(User user) {
    }
}

4、控制器类编写

/**
 * 用户控制类
 * @author Bijiaqin
 * @date 2019/6/28 11:20
 */
@Controller
@RequestMapping(path = "/user")
public class UserController {
}

5、Spring配置文件的创建

​ 在资源文件夹下创建aplicationContext.xml的配置文件，首先开启注解扫描，代码如下：

<!--开启注解扫描-->
<context:component-scan base-package="cn.njut">
        <!--配置不扫注解的类，expression中Controller类的地址为全路径，idea环境下可用Ctrl+N快速查找-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
 </context:component-scan>

​ 在ServiceImpl中加注解

@Service("userService")
public class UserServiceImpl /*实现UserService接口类中的方法*/implements UserService {
}

6、测试文件的编写

/**
 * @author Bijiaqin
 * @date 2019/6/28 13:50
 */
public class TestSpring {
    @Test
    public void run1(){
        //加载Spring配置文件
        ApplicationContext ac = 
                new ClassPathXmlApplicationContext("classpath:applicationContext.xml");      
        //获取对象
        UserService us = (UserService) ac.getBean("userService");
        //调用service实现类中的查询方法
        us.findUser();
    }
}

​ 至此，Spring环境搭建完毕，部署运行即可。

三、Spring框架整合Springmvc框架

1、Springmvc框架的搭建

1.1 web.xml配置前端控制器

<!--servlet配置前端控制器-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--初始化加载springmvc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servlet对象-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>    <!--拦截任何请求-->
  </servlet-mapping>

1.2 web.xml配置中文乱码过滤器

<!--配置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>

1.3 Springmvc框架配置文件的编写

<?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">

    <!--开启注解扫描器，扫描包下所有控制类-->
    <context:component-scan base-package="cn.njut"/>
    <!--配置视图解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--前缀-->
        <property name="prefix" value="/WEB-INF/pages/"/>
        <!--后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--配置静态资源不被拦截/javascript/css/images等-->
    <mvc:resources mapping="/js/**" location="/js/"/>
    <mvc:resources mapping="/css/**" location="/css/"/>
    <mvc:resources mapping="/fonts/**" location="/fonts/"/>
    <mvc:resources mapping="/images/**" location="/images/"/>
    <!--开启Springmvc注解，但是只对适配器、控制器、视图解析器类型生效-->
    <mvc:annotation-driven/>
</beans>

1.4 添加注解及测试编写

/**
 * 用户控制类
 * @author Bijiaqin
 * @date 2019/6/27 9:42
 */
@Controller
@RequestMapping(path = "/user")
public class UserController {
    /**
     * springmvc项目框架搭建测试
     * @return
     */
    @RequestMapping("/springmvcTest")
    public String springmvcTest(){
        System.out.println("springmvcTest执行了....");
        return "success";
    }
}

1.5 jsp测试页面

<a href="user/springmvcTest">Springmvc框架测试</a>

​ 重新部署之后刷新页面点击超链接，可看到页面跳转，在idea控制台中也可看见效果。

2、Spring整合Springmvc

2.1 启动服务器加载Spring配置文件

<!--配置spring的监听器,默认只加载WEB-INF下的applicationContext.xml配置文件,所以需要设置文件路径参数-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--设置配置文件的路径-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

​ 2.2 Controller中自动注入Service接口类

@Autowired  //自动类型注入
private UserService userService;
   /**
    * springmvc项目框架搭建测试
    * @return
    */
   @RequestMapping("/springmvcTest")
   public String springmvcTest(){
       System.out.println("表现层:springmvcTest执行了....");
       //若"@Autowired"注解成功注入UserService，则可调用其方法，表明自动Spring成功整合了Springmvc框架
       userService.findUser();
       return "success";
   }

​ 至此，Spring整合Springmvc框架结束，注意配置文件时需要仔细。

四、Spring框架整合MyBatis

​ 整合成功则service可成功调用dao对象

​ 在Spring中配置MyBatis，applicationContext.xml配置如下

<!--Spring整合MyBatis框架步骤如下-->
   <!--1、配置连接池-->
   <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
       <property name="driverClass" value="com.mysql.jdbc.Driver" />
       <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssm"/>
       <property name="user" value="root"/>
       <property name="password" value="123456"/>
   </bean>
   <!--2、配置SqlSessionFactory工厂-->
   <!--工厂可以创建session,通过session可以拿到代理对象-->
   <!--IOC容器有工厂，可以创建session，就可拿到代理对象，把代理存到IOC容器中-->
   <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
       <property name="dataSource" value="dataSource"/>
   </bean>	
   <!--3、配置Dao接口所在包-->
   <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
       <property name="basePackage" value="cn.njut.dao"></property>
   </bean>

​ 在service中通过自动注入的注解调用dao中的方法

@Autowired
    private UserDao userDao;
    @Override
    public List<User> findUser() {
        System.out.println("业务层：查询用户...");
        return userDao.findUser();
    }
    @Override
    public void registerUser(User user) {
        userDao.registerUser(user);
    }

​ Dao中操作数据库的代码如下

/**
 * 用户Dao接口
 * @author Bijiaqin
 * @date 2019/6/28 11:06
 */
@Repository
public interface UserDao {
    //查询用户，可用作登陆
    @Select("select * from user")
    public List<User> findUser();

    //注册用户，此项目无需实现
    @Insert("insert into user(name, password) values(#{name},#{password})")
    public void registerUser(User user);
}

​ 事务暂未编写