狂神說SpringMVC05：整合SSM框架

狂神說SpringMVC05：整合SSM框架

整合SSM

環境要求

環境：

• IDEA

• MySQL 5.7.19

• Tomcat 9

• Maven 3.6

要求：

• 需要熟練掌握MySQL數據庫，Spring，JavaWeb及MyBatis知識，簡單的前端知識；

 

數據庫環境

創建一個存放書籍數據的數據庫表

CREATE DATABASE `ssmbuild`;
​
USE `ssmbuild`;
​
DROP TABLE IF EXISTS `books`;
​
CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '書id',
`bookName` VARCHAR(100) NOT NULL COMMENT '書名',
`bookCounts` INT(11) NOT NULL COMMENT '數量',
`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,'從入門到放棄'),
(2,'MySQL',10,'從刪庫到跑路'),
(3,'Linux',5,'從進門到進牢');

 

基本環境搭建

1、新建一Maven項目！ssmbuild ， 添加web的支持

2、導入相關的pom依賴！

<dependencies>
   <!--Junit-->
   <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.12</version>
   </dependency>
   <!--數據庫驅動-->
   <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
       <version>5.1.47</version>
   </dependency>
   <!-- 數據庫連接池 -->
   <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資源過濾設置

<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、建立基本結構和配置框架！

• com.kuang.pojo

• com.kuang.dao

• com.kuang.service

• com.kuang.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層編寫

1、數據庫配置文件 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關聯數據庫

3、編寫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.kuang.pojo"/>
   </typeAliases>
   <mappers>
       <mapper resource="com/kuang/dao/BookMapper.xml"/>
   </mappers>
​
</configuration>

4、編寫數據庫對應的實體類 com.kuang.pojo.Books

使用lombok插件！

package com.kuang.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、編寫Dao層的 Mapper接口！

package com.kuang.dao;
​
import com.kuang.pojo.Books;
import java.util.List;
​
public interface BookMapper {
​
   //增加一個Book
   int addBook(Books book);
​
   //根據id刪除一個Book
   int deleteBookById(int id);
​
   //更新Book
   int updateBook(Books books);
​
   //根據id查詢,返回一個Book
   Books queryBookById(int id);
​
   //查詢全部Book,返回list集合
   List<Books> queryAllBook();
​
}

6、編寫接口對應的 Mapper.xml 文件。需要導入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.kuang.dao.BookMapper">
​
   <!--增加一個Book-->
   <insert id="addBook" parameterType="Books">
     insert into ssmbuild.books(bookName,bookCounts,detail)
     values (#{bookName}, #{bookCounts}, #{detail})
   </insert>
​
   <!--根據id刪除一個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>
​
   <!--根據id查詢,返回一個Book-->
   <select id="queryBookById" resultType="Books">
     select * from ssmbuild.books
     where bookID = #{bookID}
   </select>
​
   <!--查詢全部Book-->
   <select id="queryAllBook" resultType="Books">
     SELECT * from ssmbuild.books
   </select>
​
</mapper>

7、編寫Service層的接口和實現類

接口：

package com.kuang.service;
​
import com.kuang.pojo.Books;
​
import java.util.List;
​
//BookService:底下需要去實現,調用dao層
public interface BookService {
   //增加一個Book
   int addBook(Books book);
   //根據id刪除一個Book
   int deleteBookById(int id);
   //更新Book
   int updateBook(Books books);
   //根據id查詢,返回一個Book
   Books queryBookById(int id);
   //查詢全部Book,返回list集合
   List<Books> queryAllBook();
}

實現類：

package com.kuang.service;
​
import com.kuang.dao.BookMapper;
import com.kuang.pojo.Books;
import java.util.List;
​
public class BookServiceImpl implements BookService {
​
   //調用dao層的操作，設置一個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();
 }
}

OK，到此，底層需求操作編寫完畢！

 

Spring層

1、配置Spring整合MyBatis，我們這里數據源使用c3p0連接池；

2、我們去編寫Spring整合Mybatis的相關的配置文件；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.關聯數據庫文件 -->
   <context:property-placeholder location="classpath:database.properties"/>
​
   <!-- 2.數據庫連接池 -->
   <!--數據庫連接池
       dbcp 半自動化操作 不能自動連接
       c3p0 自動化操作（自動的加載配置文件 並且設置到對象里面）
   -->
   <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
       <!-- 配置連接池屬性 -->
       <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連接池的私有屬性 -->
       <property name="maxPoolSize" value="30"/>
       <property name="minPoolSize" value="10"/>
       <!-- 關閉連接后不自動commit -->
       <property name="autoCommitOnClose" value="false"/>
       <!-- 獲取連接超時時間 -->
       <property name="checkoutTimeout" value="10000"/>
       <!-- 當獲取連接失敗重試次數 -->
       <property name="acquireRetryAttempts" value="2"/>
   </bean>
​
   <!-- 3.配置SqlSessionFactory對象 -->
   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
       <!-- 注入數據庫連接池 -->
       <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.配置掃描Dao接口包，動態實現Dao接口注入到spring容器中 -->
   <!--解釋 ：https://www.cnblogs.com/jpfss/p/7799806.html-->
   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
       <!-- 注入sqlSessionFactory -->
       <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
       <!-- 給出需要掃描Dao接口包 -->
       <property name="basePackage" value="com.kuang.dao"/>
   </bean>
​
</beans>

3、Spring整合service層

<?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">
​
   <!-- 掃描service相關的bean -->
   <context:component-scan base-package="com.kuang.service" />
​
   <!--BookServiceImpl注入到IOC容器中-->
   <bean id="BookServiceImpl" class="com.kuang.service.BookServiceImpl">
       <property name="bookMapper" ref="bookMapper"/>
   </bean>
​
   <!-- 配置事務管理器 -->
   <bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
       <!-- 注入數據庫連接池 -->
       <property name="dataSource" ref="dataSource" />
   </bean>
​
</beans>

Spring層搞定！再次理解一下，Spring就是一個大雜燴，一個容器！對吧！

 

SpringMVC層

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:我們這里加載的是總的配置文件，之前被這里坑了！-->  
           <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過期時間-->
   <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.開啟SpringMVC注解驅動 -->
   <mvc:annotation-driven />
   <!-- 2.靜態資源默認servlet配置-->
   <mvc:default-servlet-handler/>
​
   <!-- 3.配置jsp 顯示ViewResolver視圖解析器 -->
   <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.掃描web相關的bean -->
   <context:component-scan base-package="com.kuang.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，暫時結束！Controller 和 視圖層編寫

1、BookController 類編寫 ， 方法一：查詢全部書籍

@Controller
@RequestMapping("/book")
public class BookController {
​
   @Autowired
   @Qualifier("BookServiceImpl")
   private BookService bookService;
​
   @RequestMapping("/allBook")
   public String list(Model model) {
       List<Books> list = bookService.queryAllBook();
       model.addAttribute("list", list);
       return "allBook";
 }
}

2、編寫首頁 index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<html>
<head>
   <title>首頁</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">點擊進入列表頁</a>
</h3>
</body>
</html>

3、書籍列表頁面 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>書籍列表</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>書籍列表 —— 顯示所有書籍</small>
               </h1>
           </div>
       </div>
   </div>
​
   <div class="row">
       <div class="col-md-4 column">
           <a class="btn btn-primary"href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
       </div>
   </div>
​
   <div class="row clearfix">
       <div class="col-md-12 column">
           <table class="table table-hover table-striped">
               <thead>
               <tr>
                   <th>書籍編號</th>
                   <th>書籍名字</th>
                   <th>書籍數量</th>
                   <th>書籍詳情</th>
                   <th>操作</th>
               </tr>
               </thead>
​
               <tbody>
               <c:forEach var="book" items="${requestScope.get('list')}">
                   <tr>
                       <td>${book.getBookID()}</td>
                       <td>${book.getBookName()}</td>
                       <td>${book.getBookCounts()}</td>
                       <td>${book.getDetail()}</td>
                       <td>
                           <ahref="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a> |
                           <ahref="${pageContext.request.contextPath}/book/del/${book.getBookID()}">刪除</a>
                       </td>
                   </tr>
               </c:forEach>
               </tbody>
           </table>
       </div>
   </div>
</div>

4、BookController 類編寫 ， 方法二：添加書籍

@RequestMapping("/toAddBook")
public String toAddPaper() {
   return "addBook";
}
​
@RequestMapping("/addBook")
public String addPaper(Books books) {
   System.out.println(books);
   bookService.addBook(books);
   return "redirect:/book/allBook";
}

5、添加書籍頁面：addBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
​
<html>
<head>
   <title>新增書籍</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>新增書籍</small>
               </h1>
           </div>
       </div>
   </div>
   <form action="${pageContext.request.contextPath}/book/addBook"method="post">
     書籍名稱：<input type="text" name="bookName"><br><br><br>
     書籍數量：<input type="text" name="bookCounts"><br><br><br>
     書籍詳情：<input type="text" name="detail"><br><br><br>
       <input type="submit" value="添加">
   </form>
​
</div>

6、BookController 類編寫 ， 方法三：修改書籍

@RequestMapping("/toUpdateBook")
public String toUpdateBook(Model model, int id) {
   Books books = bookService.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);
   bookService.updateBook(book);
   Books books = bookService.queryBookById(book.getBookID());
   model.addAttribute("books", books);
   return "redirect:/book/allBook";
}

7、修改書籍頁面 updateBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
   <title>修改信息</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>修改信息</small>
               </h1>
           </div>
       </div>
   </div>
​
   <form action="${pageContext.request.contextPath}/book/updateBook"method="post">
       <input type="hidden" name="bookID" value="${book.getBookID()}"/>
     書籍名稱：<input type="text" name="bookName"value="${book.getBookName()}"/>
     書籍數量：<input type="text" name="bookCounts"value="${book.getBookCounts()}"/>
     書籍詳情：<input type="text" name="detail" value="${book.getDetail() }"/>
       <input type="submit" value="提交"/>
   </form>
​
</div>

8、BookController 類編寫 ， 方法四：刪除書籍

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

配置Tomcat，進行運行！

到目前為止，這個SSM項目整合已經完全的OK了，可以直接運行進行測試！這個練習十分的重要，大家需要保證，不看任何東西，自己也可以完整的實現出來！

項目結構圖

 

 

 

小結及展望

這個是同學們的第一個SSM整合案例，一定要爛熟於心！

SSM框架的重要程度是不言而喻的，學到這里，大家已經可以進行基本網站的單獨開發。但是這只是增刪改查的基本操作。可以說學到這里，大家才算是真正的步入了后台開發的門。也就是能找一個后台相關工作的底線。

或許很多人，工作就做這些事情，但是對於個人的提高來說，還遠遠不夠！

我們后面還要學習一些 SpringMVC 的知識！

• Ajax 和 Json

• 文件上傳和下載

• 攔截器