# ssm-build

**Repository Path**: codeming2000/ssm-build

## Basic Information

- **Project Name**: ssm-build
- **Description**: SSM整合案例
- **Primary Language**: Java
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-03-01
- **Last Updated**: 2021-03-01

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

> 环境要求

环境：

- IDEA
- MySQL 8.0
- 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

```sql
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

1. 新建一Maven项目！ssmbuild ， 添加web的支持

2. 导入相关的pom依赖！

   ```xml
   <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>0.9.5.2</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

   ```xml
   <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.ming.pojo

   - com.ming.dao

   - com.ming.service

   - com.ming.controller

   - mybatis-config.xml

     ```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
     <?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

   1. 数据库配置文件 **database.properties**

      ```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
      <?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.ming.pojo"/>
          </typeAliases>
          <mappers>
              <mapper resource="com/ming/dao/BookMapper.xml"/>
          </mappers>
      
      </configuration>
      ```

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

      ```java
      package com.ming.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

      ```java
      package com.ming.dao;
      
      import com.ming.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
      <?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.ming.dao.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：

      ```java
      package com.ming.service;
      
      import com.ming.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:

      ```java
      package com.ming.service.impl;
      
      import com.ming.dao.BookMapper;
      import com.ming.pojo.Books;
      import com.ming.service.BookService;
      
      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();
          }
      }
      ```

> 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
   <?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.kuang.dao"/>
       </bean>
   
   </beans>
   ```

3. **Spring整合service层**

   spring-service.xml

   ```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
      http://www.springframework.org/schema/context/spring-context.xsd">
   
      <!-- 扫描service相关的bean -->
      <context:component-scan base-package="com.ming.service" />
   
      <!--BookServiceImpl注入到IOC容器中-->
      <bean id="BookServiceImpl" class="com.ming.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

1. **web.xml**

   ```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
   <?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.ming.controller" />
   
   </beans>
   ```

3. **Spring配置整合文件，applicationContext.xml**

   ```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>
   ```

> Controller 和 视图层编写

1. BookController 类编写 ， 方法一：查询全部书籍

   ```java
   @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. 编写首页 **index.jsp**

   ```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>
   ```

3. 书籍列表页面 **allBook.jsp**

   ```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</a>
                   </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>
   
                           <tbody>
                               <c:forEach var="book" items="${requestScope.get('list')}">
                                   <tr>
                                       <td>${book.getBookID()}</td>
                                       <td>${book.getBookName()}</td>
                                       <td>${book.getBookCounts()}</td>
                                       <td>${book.getDetail()}</td>
                                       <td>
                                           <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a> |
                                           <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>
                                       </td>
                                   </tr>
                               </c:forEach>
                           </tbody>
                       </table>
                   </div>
               </div>
           </div>
   ```

4. BookController 类编写 ， 方法二：添加书籍

   ```java
   @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. 添加书籍页面：**addBook.jsp**

   ```jsp
   <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
   <%@ page contentType="text/html;charset=UTF-8" language="java" %>
   
   <html>
       <head>
           <title>新增书籍</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"><br><br><br>
                   书籍数量：<input type="text" name="bookCounts"><br><br><br>
                   书籍详情：<input type="text" name="detail"><br><br><br>
                   <input type="submit" value="添加">
               </form>
   
           </div>
       </body>
   </html>
   ```

6. BookController 类编写 ， 方法三：修改书籍

   ```java
   @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. 修改书籍页面  **updateBook.jsp**

   ```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()}"/>
                   书籍名称：<input type="text" name="bookName" value="${book.getBookName()}"/>
                   书籍数量：<input type="text" name="bookCounts" value="${book.getBookCounts()}"/>
                   书籍详情：<input type="text" name="detail" value="${book.getDetail() }"/>
                   <input type="submit" value="提交"/>
               </form>
   
           </div>
       </body>
   </html>
   ```

8. BookController 类编写 ， 方法四：删除书籍

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

**配置Tomcat，进行运行！**

> 项目结构图

![图片](https://gitee.com/codeming2000/myblog-photos/raw/master/SSM%E6%95%B4%E5%90%88.assets/640.png)

![图片](https://gitee.com/codeming2000/myblog-photos/raw/master/SSM%E6%95%B4%E5%90%88.assets/640-1614570237612.png)



< 学习自狂神说 >

案例地址：https://gitee.com/codeming2000/ssm-build