整合SSM框架

环境要求

环境：

IDEA
MySQL 8.0.21
Tomcat 9
Maven 3.6

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；

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');

基本环境搭建

新建一Maven项目！SSMBuild ，添加web的支持
导入相关的pom依赖！

<dependencies>
    <!--Junit-->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
    <!--数据库驱动-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.21</version>
    </dependency>
    <!-- 数据库连接池 -->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.5</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>2.2</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>3.5.5</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.5</version>
    </dependency>

    <!--Spring-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.2.9.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.2.9.RELEASE</version>
    </dependency>

    <!--Lombok-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.12</version>
    </dependency>
</dependencies>

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>

建立基本结构和配置框架！

com.zhy.pojo
com.zhy.mapper
com.zhy.service
com.zhy.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>

Mybatis层编写

数据库配置文件 database.properties

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

IDEA关联数据库

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.zhy.pojo"/>
  </typeAliases>
  <mappers>
      <mapper resource="com/zhy/mapper/BookMapper.xml"/>
  </mappers>

</configuration>

编写数据库对应的实体类 com.zhy.pojo.Books（使用lombok插件！）

package com.zhy.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
      
      

  private int bookID;
  private String bookName;
  private int bookCounts;
  private String detail;

}

编写Dao层的 Mapper接口！

package com.zhy.mapper;

import com.zhy.pojo.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BookMapper {
      
      

  //add
  int addBook(Books books);

  //delete
  int deleteBook(@Param("bookId") int id);

  //update
  int updateBook(Books books);

  //query
  Books queryBookById(@Param("bookId") int id);

  //query all
  List<Books> queryAllBook();
  
  //query book by BookName
   List<Books> queryBookByName(@Param("bookName") String name);
}

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.zhy.mapper.BookMapper">

    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books(bookName, bookCounts, detail)
        values (#{bookName}, #{bookCounts}, #{detail});
    </insert>

    <delete id="deleteBook" parameterType="_int">
        delete
        from ssmbuild.books
        where bookID = #{bookId};
    </delete>

    <update id="updateBook" parameterType="Books">
        update ssmbuild.books
        set bookName   = #{bookName},
        bookCounts = #{bookCounts},
        detail     = #{detail}
        where bookID = #{bookID};
    </update>

    <select id="queryBookById" parameterType="_int" resultType="Books">
        select *
        from ssmbuild.books
        where bookID = #{bookId};
    </select>

    <select id="queryAllBook" resultType="Books">
        select * from ssmbuild.books;
    </select>

    <select id="queryBookByName" resultType="Books" parameterType="String">
        select *
        from ssmbuild.books
        where bookName like concat('%',#{bookName},'%');
    </select>
</mapper>

编写Service层的接口和实现类

接口：

package com.zhy.service;

import com.zhy.pojo.Books;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Service;

import java.util.List;

public interface BookService {
    
    
    //add
    int addBook(Books books);

    //delete
    int deleteBook(int id);

    //update
    int updateBook(Books books);

    //query
    Books queryBookById(int id);

    //query all
    List<Books> queryAllBook();

    //query book by BookName
    List<Books> queryBookByName(String bookName);
}

实现类：

package com.zhy.service;

import com.zhy.mapper.BookMapper;
import com.zhy.pojo.Books;

import java.util.List;

public class BookServiceImpl implements BookService{
    
    
    //service层调mapper层：组合Dao
    private BookMapper bookMapper;
    public void setBookMapper(BookMapper bookMapper) {
    
    
        this.bookMapper = bookMapper;
    }

    public int addBook(Books books) {
    
    
        return bookMapper.addBook(books);
    }

    public int deleteBook(int id) {
    
    
        return bookMapper.deleteBook(id);
    }

    public int updateBook(Books books) {
    
    
        return bookMapper.updateBook(books);
    }

    public Books queryBookById(int id) {
    
    
        return bookMapper.queryBookById(id);
    }

    public List<Books> queryAllBook() {
    
    
        return bookMapper.queryAllBook();
    }

    public List<Books> queryBookByName(String bookName) {
    
    
        return bookMapper.queryBookByName(bookName);
    }
}

OK，到此，底层需求操作编写完毕！

Spring层

配置Spring整合MyBatis，我们这里数据源使用c3p0连接池；

我们去编写Spring整合Mybatis的相关的配置文件；spring-mapper.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）
  druid
  hikari
 -->
    <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MyBatis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.zhy.mapper"/>
    </bean>
</beans>

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"
	   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">

	<!-- 扫描service相关的bean -->
	<context:component-scan base-package="com.zhy.service"/>

	<!--BookServiceImpl注入到IOC容器中-->
	<bean id="BookServiceImpl" class="com.zhy.service.BookServiceImpl">
		<property name="bookMapper" ref="bookMapper"/>
	</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>

SpringMVC层

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>

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.zhy.controller" />

</beans>

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-mapper.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

BookController 类编写，方法一：查询全部书籍

@Controller
@RequestMapping("/book")
public class BookController {
    
    

    @Qualifier("BookServiceImpl")
    private BookService bookService;

    @Autowired
    public void setBookService(BookService bookService) {
    
    
        this.bookService = bookService;
    }

    @RequestMapping("/allBook")
    public String list(Model model) {
    
    
        List<Books> list = bookService.queryAllBook();
        model.addAttribute("list", list);
        return "allBook";
    }
}

编写首页 index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
        <head>
            <style type="text/css">
                a {
     
     
                    text-decoration: none;
                    color: black;
                    font-size: 18px;
                }

                h3 {
     
     
                    width: 180px;
                    height: 38px;
                    margin: 100px auto;
                    text-align: center;
                    line-height: 38px;
                    background: deepskyblue;
                    border-radius: 4px;
                }
            </style>
            <title>首页</title>
        </head>
        <body>
            <h3>
                <a href="${pageContext.request.contextPath}/book/allBook">进入书籍页面</a>
            </h3>
        </body>
    </html>

书籍列表页面 allbook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
        <html>
            <head>
                <title>书籍展示</title>
                <!-- 引入 Bootstrap -->
                <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
            </head>
            <body>
                <div class="container">
                    <div class="row clearfix">
                        <div class="col-md-12 column">
                            <div class="page-header">
                                <h1>
                                    <small>书籍列表 ---- 显示所有书籍</small>
                                </h1>
                            </div>
                        </div>

                        <div class="row">
                            <div class="col-md-4 column">
                                <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
                            </div>
                            <div class="col-md-4 column"></div>
                            <div class="col-md-4 column">
                                <%--查询书籍--%>
                                    <form action="${pageContext.request.contextPath}/book/queryBook" method="post" class="form-inline" style="float: right">
                                        <span style="color: red;font-weight: bold">${error}</span>
                                        <input type="text" name="queryBookName" class="form-control" placeholder="请输入要查询的书籍名称">
                                        <input type="submit" value="查询" class="btn btn-primary">
                                    </form>
                                    </div>
                            </div>
                        </div>

                        <div class="row clearfix">
                            <div class="col-md-12 column">
                                <table class="table table-hover table-striped">
                                    <thead>
                                        <tr>
                                            <th>书籍编号</th>
                                            <th>书籍名称</th>
                                            <th>书籍数量</th>
                                            <th>书籍详情</th>
                                            <th>操作</th>
                                        </tr>
                                    </thead>
                                    <%--书籍从数据库中查询出来，从这个list中遍历出来--%>
                                        <tbody>
                                            <c:forEach var="book" items="${list}">
                                                <tr>
                                                    <td>${book.bookID}</td>
                                                    <td>${book.bookName}</td>
                                                    <td>${book.bookCounts}</td>
                                                    <td>${book.detail}</td>
                                                    <td>
                                                        <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.bookID}">修改</a>
                                                        &nbsp; | &nbsp;
                                                        <a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookID}">删除</a>
                                                    </td>
                                                </tr>
                                            </c:forEach>
                                        </tbody>
                                        </table>
                                    </div>
                            </div>
                        </div>


                        </body>
                    </html>

BookController 类编写，方法二：添加书籍

//跳转到增加书籍页面
@RequestMapping("/toAddBook")
public String toAddBook() {
    
    
    return "addBook";
}

//添加书籍请求
@RequestMapping("/addBook")
public String addBook(Books books) {
    
    
    System.out.println("addBook=>" + books);
    bookService.addBook(books);
    return "redirect:/book/allBook";//重定向到 @RequestMapping("/allBook")请求
}

添加书籍页面：addBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
        <head>
            <title>新增书籍</title>
            <!-- 引入 Bootstrap -->
            <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
        </head>
        <body>
            <div class="container">
                <div class="row clearfix">
                    <div class="col-md-12 column">
                        <div class="page-header">
                            <h1>
                                <small>书籍列表 ---- 新增书籍</small>
                            </h1>
                        </div>
                    </div>
                </div>

                <form action="${pageContext.request.contextPath}/book/addBook" method="post">
                    书籍名称：<input type="text" name="bookName" required><br><br><br>
                    书籍数量：<input type="text" name="bookCounts" required><br><br><br>
                    书籍详情：<input type="text" name="detail" required><br><br><br>
                    <input type="submit" value="添加">
                </form>

            </div>
        </body>
    </html>

BookController 类编写，方法三：修改书籍

//跳转到修改页面
@RequestMapping("/toUpdateBook")
public String toUpdateBook(int id,Model model){
    
    
    Books books = bookService.queryBookById(id);
    model.addAttribute("books",books);
    return "updateBook";
}

//修改书籍
@RequestMapping("/updateBook")
public String updateBook(Books books){
    
    
    System.out.println("updateBook=>"+books);
    bookService.updateBook(books);
    return "redirect:/book/allBook";
}

修改书籍页面 updateBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
        <head>
            <title>修改书籍</title>
        </head>
        <body>
            <div class="container">
                <div class="row clearfix">
                    <div class="col-md-12 column">
                        <div class="page-header">
                            <h1>
                                <small>修改书籍</small>
                            </h1>
                        </div>
                    </div>
                </div>

                <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
                    <%--最开始没有传bookID，修改失败--%>
                     <%--前端传递隐藏域--%>
                	<input type="hidden" name="bookID" value="${books.bookID}">
            书籍名称：<input type="text" name="bookName" value="${books.bookName}" required><br><br><br>
            书籍数量：<input type="text" name="bookCounts" value="${books.bookCounts}" required><br><br><br>
            书籍详情：<input type="text" name="detail" value="${books.detail}" required><br><br><br>
             		<input type="submit" value="修改">
               	</form>
         	</div>
   		</body>
	</html>

BookController 类编写，方法四：删除书籍

//删除书籍
@RequestMapping("/deleteBook/{bookId}")
public String deleteBook(@PathVariable("bookId") int id){
    
    
    bookService.deleteBook(id);
    return "redirect:/book/allBook";
}

配置Tomcat，进行运行！

项目结构图

在这里插入图片描述

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项目结构图

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