整合SSM框架

9、整合ssm框架

9.1、环境要求

环境：

• IDEA
• MySQL 5.7.19
• 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');

9.2、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>4.12</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>0.9.5.2</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>3.5.2</version>
   </dependency>
   <dependency>
       <groupId>org.mybatis</groupId>
       <artifactId>mybatis-spring</artifactId>
       <version>2.0.2</version>
   </dependency>

   <!--Spring-->
   <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-webmvc</artifactId>
       <version>5.1.9.RELEASE</version>
   </dependency>
   <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-jdbc</artifactId>
       <version>5.1.9.RELEASE</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>

5. 建立基本结构和配置框架

• com.mlf.pojo

• com.mlf.mapper

• com.mlf.service

• com.mlf.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>
  

9.3、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=true&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.mlf.pojo"/>
   </typeAliases>
   <mappers>
       <mapper resource="com/mlf/dao/BookMapper.xml"/>
   </mappers>
</configuration>

4、编写数据库对应的实体类 com.mlf.pojo.Books

使用lombok插件！

package com.mlf.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;
}

5、编写Dao层的 Mapper接口！

package com.mlf.mapper;
import com.mlf.pojo.Books;
import java.util.List;

public interface BookMapper {

   //增加一个Book
   int addBook(Books book);

   //根据id删除一个Book
   int deleteBookById(int id);

   //更新Book
   int updateBook(Books books);

   //根据id查询,返回一个Book
   Books queryBookById(int id);

   //查询全部Book,返回list集合
   List<Books> queryAllBook();

}

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 Mapper 3.0//EN"
       "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.mlf.mapper.BookMapper">

   <!--增加一个Book-->
   <insert id="addBook" parameterType="Books">
      insert into ssmbuild.books(bookName,bookCounts,detail)
      values (#{bookName}, #{bookCounts}, #{detail})
   </insert>

   <!--根据id删除一个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,返回一个Book-->
   <select id="queryBookById" resultType="Books">
      select * from ssmbuild.books
      where bookID = #{bookID}
   </select>

   <!--查询全部Book-->
   <select id="queryAllBook" resultType="Books">
      SELECT * from ssmbuild.books
   </select>

</mapper>

7、编写Service层的接口和实现类

接口：

package com.mlf.service;

import com.mlf.pojo.Books;

import java.util.List;

//BookService:底下需要去实现,调用dao层
public interface BookService {
   //增加一个Book
   int addBook(Books book);
   //根据id删除一个Book
   int deleteBookById(int id);
   //更新Book
   int updateBook(Books books);
   //根据id查询,返回一个Book
   Books queryBookById(int id);
   //查询全部Book,返回list集合
   List<Books> queryAllBook();
}

实现类：

package com.mlf.service;

import com.mlf.mapper.BookMapper;
import com.mlf.pojo.Books;
import java.util.List;

public class BookServiceImpl implements BookService {

   //调用dao层的操作，设置一个set接口，方便Spring管理
   private BookMapper bookMapper;

   public void setBookMapper(BookMapper bookMapper) {
       this.bookMapper = bookMapper;
  }
   
   public int addBook(Books book) {
       return bookMapper.addBook(book);
  }
   
   public int deleteBookById(int id) {
       return bookMapper.deleteBookById(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();
  }
}

9.4、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.mlf.mapper"/>
   </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"
      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.mlf.service" />

   <!--BookServiceImpl注入到IOC容器中-->
   <bean id="BookServiceImpl" class="com.mlf.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>

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

9.5、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 -->
   <beanclass="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.mlf.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>

9.6、Controller 和 视图层编写

package com.mlf.controller;

import com.mlf.pojo.Books;
import com.mlf.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.ArrayList;
import java.util.List;

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

    //controooller 调service层
    @Autowired
    @Qualifier("BookServiceImpl")
    private BookService bookService;

    //查询全部书籍，并且返回到一个书籍展示页面
    @RequestMapping("/allBook")
    public String list(Model model){
        List<Books> list=bookService.queryAllBook();
        model.addAttribute("list",list);
        return "allBook";
    }

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

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

    //跳转到更新页面
    @RequestMapping("/toUpdateBook")
    public String toUpdateBook(int id,Model model){
        Books books1 = bookService.queryBookById(id);
        model.addAttribute("Qbook",books1);
        return "updateBook";
    }

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

    //删除
    @RequestMapping("/delete/{bookId}")
    public String delete(@PathVariable("bookId") int id){
        System.out.println("delete==>删除了"+bookService.queryBookById(id));
        bookService.deleteBookById(id);
        return "redirect:/book/allBook";
    }

    //查询ByName
    @RequestMapping("/queryByName")
    public String queryByName(String queryBookName,Model model){
        Books books = bookService.queryBookByName(queryBookName);
        System.err.println("queryByName==>"+books);
        List<Books> list=new ArrayList<Books>();
        list.add(books);
        model.addAttribute("list",list);
        return "allBook";
    }

}

9.7、index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<html>
<head>
  <title>首页</title>
  <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>
</head>
<body>

<h3>
  <a href="${pageContext.request.contextPath}/book/allBook">点击进入列表页</a>
</h3>
</body>
</html>

9.8、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>书籍列表</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 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>

    <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><br><br>

    <div class="row">
        <div class="col-md-4 column">
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部</a>
        </div>
    </div><br><br>

<div class="row">
    <div class="col-md-4 column">
        <form action="${pageContext.request.contextPath}/book/queryByName" method="post">
            <input type="text" name="queryBookName"  class="form-control" placeholder="请输入要查询的书籍名称" required><br>
            <input type="submit" class="btn btn-primary" value="搜索">
        </form>
    </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>书籍名字</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：foreach--%>
                <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=${book.bookID}">更改</a>
                            <a href="${pageContext.request.contextPath}/book/delete/${book.bookID}">删除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>

9.8.1、addBook.jsp

<%--
  Created by IntelliJ IDEA.
  User: 马龙飞
  Date: 2022/1/22
  Time: 12:28
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>新增书籍</title>
    <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>新增书籍</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/addBook" method="post">
        <div class="form-group">
            <label>书籍编号：</label>
            <input type="text" name="bookID" class="form-control" required>
        </div>
        <div class="form-group">
            <label>书籍名称：</label>
            <input type="text" name="bookName" class="form-control" required>
        </div>
        <div class="form-group">
            <label>书籍数量：</label>
            <input type="text" name="bookCounts" class="form-control" required>
        </div>
        <div class="form-group">
            <label>书籍描述：</label>
            <input type="text" name="detail" class="form-control" required>
        </div>
        <div class="form-group">
            <input type="submit" class="form-control" value="添加">
        </div>
    </form>

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