深入解析：SpringMVC基础教程（3）--SSM框架整合

视频参考链接：【狂神说Java】SpringMVC最新教程IDEA版通俗易懂 p17-23

1、环境要求

环境：

• IDEA
• MySQL 5.1.47
• Tomcat 9
• Maven 3.9.9

要求：

• 需要熟练掌握MySQL数据库，Spring，JavaWeb及MyBatis知识，简单的前端知识；

2、数据库环境

创建一个存放书籍数据的数据库表

CREATE DATABASE `ssmbuild`;
USE `ssmbuild`;
DROP TABLE IF EXISTS `books`;
CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
`bookCounts` INT(11) NOT NULL COMMENT '数量',
`detail` VARCHAR(200) NOT NULL COMMENT '描述',
KEY `bookID` (`bookID`)
) ENGINE=INNODB DEFAULT CHARSET=utf8
INSERT  INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');

3、基本环境搭建

1、新建一Maven项目！ssmbuild ， 添加web的支持

2、导入相关的pom依赖！

<dependencies>
  <!--Junit-->
    <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.13.2</version>
    </dependency>
    <!--数据库驱动-->
      <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.47</version>
      </dependency>
      <!--数据库连接池-->
        <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.5</version>
        </dependency>
        <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>mchange-commons-java</artifactId>
        <version>0.2.19</version>
        </dependency>
        <!--Servlet - JSP-->
          <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>servlet-api</artifactId>
          <version>2.5</version>
          </dependency>
          <dependency>
          <groupId>javax.servlet.jsp</groupId>
          <artifactId>jsp-api</artifactId>
          <version>2.1</version>
          </dependency>
          <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
          </dependency>
          <!--Mybatis-->
            <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.19</version>
            </dependency>
            <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.1.1</version>
            </dependency>
            <!--Spring-->
              <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-webmvc</artifactId>
              <version>5.2.0.RELEASE</version>
              </dependency>
              <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-jdbc</artifactId>
              <version>5.2.0.RELEASE</version>
              </dependency>
              <!--lombok-->
                <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.36</version>
                </dependency>
              </dependencies>

3、Maven资源过滤设置

<build>
  <resources>
    <resource>
    <directory>src/main/java</directory>
      <includes>
      <include>**/*.properties</include>
      <include>**/*.xml</include>
      </includes>
    <filtering>false</filtering>
    </resource>
    <resource>
    <directory>src/main/resources</directory>
      <includes>
      <include>**/*.properties</include>
      <include>**/*.xml</include>
      </includes>
    <filtering>false</filtering>
    </resource>
  </resources>
</build>

4、建立基本结构和配置框架！

• com.lingbo.pojo

• com.lingbo.dao

• com.lingbo.service

• com.lingbo.controller

• mybatis-config.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>
  </configuration>

• 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"
      xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd">
  </beans>

4、Mybatis层编写

1、数据库配置文件 database.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456

2、IDEA关联数据库

3、编写MyBatis的核心配置文件

<?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>
    <typeAliases>
      <package name="com.lingbo.pojo"/>
    </typeAliases>
    <mappers>
      <mapper resource="com/lingbo/dao/BooksMapper.xml"/>
    </mappers>
  </configuration>

4、编写数据库对应的实体类 com.lingbo.pojo.Books

使用lombok插件！

package com.lingbo.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@NoArgsConstructor
@AllArgsConstructor
@Data
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}

5、编写Dao层的 Mapper接口！

package com.lingbo.dao;
import com.lingbo.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface BooksMapper {
//增加一本Book
int addBook(Books books);
//根据id删除一本Book
int deleteBookById(@Param("bookID") int id);
//更新Book
int updateBook(Books books);
//根据id查询Book
Books queryBookById(@Param("bookID") int id);
//查询全部Books，返回list集合
List<Books> queryAllBooks();
  //通过书籍名字查询信息
  Books queryBookByName(@Param("bookName") String bookName);
  }

6、编写接口对应的 Mapper.xml 文件。需要导入MyBatis的包；

<?xml version="1.0" encoding="UTF-8" ?>
  <!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.lingbo.dao.BooksMapper">
    <!--增加一本Book-->
        <insert id="addBook" parameterType="books">
        insert into ssmbuild.books (bookName, bookCounts, detail)
        values (#{bookName}, #{bookCounts}, #{detail});
      </insert>
      <!--根据id删除一本Book-->
          <delete id="deleteBookById" parameterType="_int">
          delete
          from ssmbuild.books
          where bookID = #{bookID};
        </delete>
        <!--更新Book-->
            <update id="updateBook" parameterType="books">
            update ssmbuild.books
            set bookName   = #{bookName},
            bookCounts = #{bookCounts},
            detail     = #{detail}
            where bookID = #{bookID};
          </update>
          <!--根据id查询Book-->
              <select id="queryBookById" parameterType="_int" resultType="books">
              select *
              from ssmbuild.books
              where bookID = #{bookID};
            </select>
            <!--查询全部Books，返回list集合-->
                <select id="queryAllBooks" resultType="books">
                select *
                from ssmbuild.books;
              </select>
              <!--通过书籍名字查询信息-->
                  <select id="queryBookByName" resultType="books">
                  select *
                  from ssmbuild.books
                  where bookName = #{bookName};
                </select>
              </mapper>

7、编写Service层的接口和实现类

接口：

package com.lingbo.service;
import com.lingbo.pojo.Books;
import java.util.List;
//BookService:底下需要去实现,调用dao层
public interface BooksService {
//增加一本Book
int addBook(Books books);
//根据id删除一本Book
int deleteBookById(int id);
//更新Book
int updateBook(Books books);
//根据id查询Book
Books queryBookById(int id);
//查询全部Books，返回list集合
List<Books> queryAllBooks();
  //通过书籍名字查询信息
  Books queryBookByName(String bookName);
  }

实现类：

package com.lingbo.service;
import com.lingbo.dao.BooksMapper;
import com.lingbo.pojo.Books;
import java.util.Collections;
import java.util.List;
public class BooksServiceImpl implements BooksService {
//调用dao层的操作，设置一个set接口，方便Spring管理
private BooksMapper booksMapper;
public void setBooksMapper(BooksMapper booksMapper) {
this.booksMapper = booksMapper;
}
@Override
public int addBook(Books books) {
return booksMapper.addBook(books);
}
@Override
public int deleteBookById(int id) {
return booksMapper.deleteBookById(id);
}
@Override
public int updateBook(Books books) {
return booksMapper.updateBook(books);
}
@Override
public Books queryBookById(int id) {
return booksMapper.queryBookById(id);
}
@Override
public List<Books> queryAllBooks() {
  return booksMapper.queryAllBooks();
  }
  @Override
  public Books queryBookByName(String bookName) {
  return booksMapper.queryBookByName(bookName);
  }
  }

OK，到此，底层需求操作编写完毕！

5、Spring层

1、配置Spring整合MyBatis，我们这里数据源使用c3p0连接池；

2、我们去编写Spring整合Mybatis的相关的配置文件；spring-dao.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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/context
  https://www.springframework.org/schema/context/spring-context.xsd">
  <!-- 配置整合mybatis -->
    <!-- 1.关联数据库文件 -->
      <context:property-placeholder location="classpath:database.properties"/>
      <!-- 2.数据库连接池 -->
        <!--数据库连接池
        dbcp  半自动化操作  不能自动连接
        c3p0  自动化操作（自动的加载配置文件 并且设置到对象里面）
        -->
          <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
          <!-- 配置连接池属性 -->
            <property name="driverClass" value="${jdbc.driver}"/>
            <property name="jdbcUrl" value="${jdbc.url}"/>
            <property name="user" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
            <!-- c3p0连接池的私有属性 -->
              <property name="maxPoolSize" value="30"/>
              <property name="minPoolSize" value="10"/>
              <!-- 关闭连接后不自动commit -->
                <property name="autoCommitOnClose" value="false"/>
                <!-- 获取连接超时时间 -->
                  <property name="checkoutTimeout" value="10000"/>
                  <!-- 当获取连接失败重试次数 -->
                    <property name="acquireRetryAttempts" value="2"/>
                  </bean>
                  <!-- 3.配置SqlSessionFactory对象 -->
                      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
                      <!-- 注入数据库连接池 -->
                        <property name="dataSource" ref="dataSource"/>
                        <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
                          <property name="configLocation" value="classpath:mybatis-config.xml"/>
                        </bean>
                        <!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->
                          <!--解释 ：https://www.cnblogs.com/jpfss/p/7799806.html-->
                              <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
                              <!-- 注入sqlSessionFactory -->
                                <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
                                <!-- 给出需要扫描Dao接口包 -->
                                  <property name="basePackage" value="com.lingbo.dao"/>
                                </bean>
                              </beans>

3、Spring整合service层

<?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:jdbc="http://www.springframework.org/schema/jdbc"
    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/jdbc
  http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
  http://www.springframework.org/schema/tx
  http://www.springframework.org/schema/tx/spring-tx.xsd">
  <!-- 扫描service相关的bean -->
    <context:component-scan base-package="com.lingbo.service"/>
    <!--BookServiceImpl注入到IOC容器中-->
        <bean id="BooksServiceImpl" class="com.lingbo.service.BooksServiceImpl">
        <property name="booksMapper" ref="booksMapper"/>
      </bean>
      <!-- 配置事务管理器 -->
          <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
          <!-- 注入数据库连接池 -->
            <property name="dataSource" ref="dataSource"/>
          </bean>
        </beans>

Spring层搞定！再次理解一下，Spring就是一个大杂烩，一个容器！对吧！

6、SpringMVC层

1、web.xml

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
    version="4.0">
  <!--DispatcherServlet-->
    <servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
      <param-name>contextConfigLocation</param-name>
        <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
        <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
      <load-on-startup>1</load-on-startup>
      </servlet>
      <servlet-mapping>
      <servlet-name>DispatcherServlet</servlet-name>
      <url-pattern>/</url-pattern>
      </servlet-mapping>
      <!--encodingFilter-->
        <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
        </filter-mapping>
        <!--Session过期时间-->
          <session-config>
          <session-timeout>15</session-timeout>
          </session-config>
        </web-app>

2、spring-mvc.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:mvc="http://www.springframework.org/schema/mvc"
    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/mvc
  https://www.springframework.org/schema/mvc/spring-mvc.xsd">
  <!-- 配置SpringMVC -->
    <!-- 1.开启SpringMVC注解驱动 -->
      <mvc:annotation-driven/>
      <!-- 2.静态资源默认servlet配置-->
        <mvc:default-servlet-handler/>
        <!-- 3.配置jsp 显示ViewResolver视图解析器 -->
            <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
            <property name="prefix" value="/WEB-INF/jsp/"/>
            <property name="suffix" value=".jsp"/>
          </bean>
          <!-- 4.扫描web相关的bean -->
            <context:component-scan base-package="com.lingbo.controller"/>
          </beans>

3、Spring配置整合文件，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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans.xsd">
  <import resource="spring-dao.xml"/>
  <import resource="spring-service.xml"/>
  <import resource="spring-mvc.xml"/>
</beans>

配置文件，暂时结束！Controller 和 视图层编写

1、BooksController 类编写 ， 方法一：查询全部书籍

@Controller
@RequestMapping("/books")
public class BooksController {
@Autowired
@Qualifier("BooksServiceImpl")
private BooksService booksService;
@RequestMapping("/allBooks")
public String allBooks(Model model) {
List<Books> books = booksService.queryAllBooks();
  model.addAttribute("list", books);
  return "allBooks";
  }
  }

2、编写首页 index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>



     
     



     点击进入列表页

3、书籍列表页面 allBooks.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    
    
    
    



    

        

            

                

                    书籍列表 —— 显示所有书籍
                
            
        
    
    

        

            新增
            显示全部书籍
        
        

            <%--查询书籍--%>
            

                ${error}
                
                
            
        
    
    

        

            
                    

                

                

                    
书籍编号
                    
书籍名字
                    
书籍数量
                    
书籍详情
                    
操作
                
                
                

                

                        
${book.getBookID()}
                        
${book.getBookName()}
                        
${book.getBookCounts()}
                        
${book.getDetail()}
                        

                            更改
                            |
                            删除
                        
                    
                
                
            
        
    

4、BookController 类编写 ， 方法二：添加书籍

@Controller
@RequestMapping("/books")
public class BooksController {
@RequestMapping("/toAddBook")
public String toAddBook() {
return "addBook";
}
@RequestMapping("/addBook")
public String addBook(Books books) {
System.out.println(books);
booksService.addBook(books);
return "redirect:/books/allBooks";
}
}

5、添加书籍页面：addBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


     
     
     
     



     

       

         

           

             新增书籍
           
         
       
     
     

        书籍名称：



        书籍数量：



        书籍详情：



       
     

6、BookController 类编写 ， 方法三：修改书籍

@Controller
@RequestMapping("/books")
public class BooksController {
@RequestMapping("/toUpdateBook")
public String toUpdateBook(Model model, int id) {
Books books = booksService.queryBookById(id);
System.out.println(books);
model.addAttribute("book", books);
return "updateBook";
}
@RequestMapping("/updateBook")
public String updateBook(Model model, Books book) {
System.out.println(book);
booksService.updateBook(book);
Books books = booksService.queryBookById(book.getBookID());
model.addAttribute("books", books);
return "redirect:/books/allBooks";
}
}

7、修改书籍页面 updateBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


     
     
     
     



     

       

         

           

             修改信息
           
         
       
     
     

       
        书籍名称：
        书籍数量：
        书籍详情：
       
     

8、BookController 类编写 ， 方法四：删除书籍

@Controller
@RequestMapping("/books")
public class BooksController {
@RequestMapping("/del/{bookId}")
public String deleteBook(@PathVariable("bookId") int id) {
booksService.deleteBookById(id);
return "redirect:/books/allBooks";
}
}

9、BookController 类编写 ， 方法五：通过书名查询书籍

@Controller
@RequestMapping("/books")
public class BooksController {
//查询书籍
@RequestMapping("/queryBook")
public String queryBook(String queryBookName, Model model) {
Books books = booksService.queryBookByName(queryBookName);
List<Books> booksList = new ArrayList<Books>();
  booksList.add(books);
  if (books == null){
  booksList = booksService.queryAllBooks();
  model.addAttribute("error","未查到");
  }
  model.addAttribute("list", booksList);
  return "allBooks";
  }
  }

配置Tomcat，进行运行！

到目前为止，这个SSM项目整合已经完全的OK了，可以直接运行进行测试！

项目结构图