SpringMVC-狂神（5.整合SSM框架）学习笔记

1. 整合SSM

1. 环境要求

环境：

IDEA / Eclipse
MySQL 5.7 +
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

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 (版本个人自己选择)

   <dependencies>
      
      <dependency>
          <groupId>junitgroupId>
          <artifactId>junitartifactId>
          <version>4.12version>
      dependency>
      
      <dependency>
          <groupId>mysqlgroupId>
          <artifactId>mysql-connector-javaartifactId>
          <version>5.1.47version>
      dependency>
      
      <dependency>
          <groupId>com.mchangegroupId>
          <artifactId>c3p0artifactId>
          <version>0.9.5.2version>
      dependency>
   
      
      <dependency>
          <groupId>javax.servletgroupId>
          <artifactId>servlet-apiartifactId>
          <version>2.5version>
      dependency>
      <dependency>
          <groupId>javax.servlet.jspgroupId>
          <artifactId>jsp-apiartifactId>
          <version>2.2version>
      dependency>
      <dependency>
          <groupId>javax.servletgroupId>
          <artifactId>jstlartifactId>
          <version>1.2version>
      dependency>
   
      
      <dependency>
          <groupId>org.mybatisgroupId>
          <artifactId>mybatisartifactId>
          <version>3.5.2version>
      dependency>
      <dependency>
          <groupId>org.mybatisgroupId>
          <artifactId>mybatis-springartifactId>
          <version>2.0.2version>
      dependency>
   
      
      <dependency>
          <groupId>org.springframeworkgroupId>
          <artifactId>spring-webmvcartifactId>
          <version>5.1.9.RELEASEversion>
      dependency>
      <dependency>
          <groupId>org.springframeworkgroupId>
          <artifactId>spring-jdbcartifactId>
          <version>5.1.9.RELEASEversion>
      dependency>
   dependencies>
   

3. Maven资源过滤设置

   <build>
      <resources>
          <resource>
              <directory>src/main/javadirectory>
              <includes>
                  <include>**/*.propertiesinclude>
                  <include>**/*.xmlinclude>
              includes>
              <filtering>falsefiltering>
          resource>
          <resource>
              <directory>src/main/resourcesdirectory>
              <includes>
                  <include>**/*.propertiesinclude>
                  <include>**/*.xmlinclude>
              includes>
              <filtering>falsefiltering>
          resource>
      resources>
   build>
   

4. 建立基本结构和配置框架

   • com.pojo
   • com.dao
   • com.service
   • com.controller
   • mybatis-config.xml

     
     
     <configuration>
     
     configuration>
     

   • applicationContext.xml

     
     <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=true&useUnicode=true&characterEncoding=utf8
   jdbc.username=root
   jdbc.password=123456
   

2. 关联数据库，测试连接

3. 编写MyBatis的核心配置文件

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

4. 编写数据库对应的实体类 com.pojo.Books

   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

   import com.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

   
   
   
   <mapper namespace="com.dao.BookMapper">
   
      
      <insert id="addBook" parameterType="Books">
         insert into ssmbuild.books(bookName,bookCounts,detail)
         values (#{bookName}, #{bookCounts}, #{detail})
      insert>
   
      
      <delete id="deleteBookById" 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" resultType="Books">
         select * from ssmbuild.books
         where bookID = #{bookID}
      select>
   
      
      <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

   import com.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

   import com.dao.BookMapper;
   import com.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();
     }
   }
   

• 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

   
   <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">
   
      
      
      <context:property-placeholder location="classpath:database.properties"/>
   
      
      
      <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
          
          <property name="driverClass" value="${jdbc.driver}"/>
          <property name="jdbcUrl" value="${jdbc.url}"/>
          <property name="user" value="${jdbc.username}"/>
          <property name="password" value="${jdbc.password}"/>
   
          
          <property name="maxPoolSize" value="30"/>
          <property name="minPoolSize" value="10"/>
          
          <property name="autoCommitOnClose" value="false"/>
          
          <property name="checkoutTimeout" value="10000"/>
          
          <property name="acquireRetryAttempts" value="2"/>
      bean>
   
      
      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
          
          <property name="dataSource" ref="dataSource"/>
          
          <property name="configLocation" value="classpath:mybatis-config.xml"/>
      bean>
   
      
      
      <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
          
          <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
          
          <property name="basePackage" value="com.dao"/>
      bean>
   
   beans>
   

3. Spring整合service层

   
   <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">
   
      
      <context:component-scan base-package="com.service" />
   
      
      <bean id="BookServiceImpl" class="com.service.BookServiceImpl">
          <property name="bookMapper" ref="bookMapper"/>
      bean>
   
      
      <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
          
          <property name="dataSource" ref="dataSource" />
      bean>
   
   beans>
   

• Spring层搞定

6. SpringMVC层

1. web.xml

   
   <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">
   
      
      <servlet>
          <servlet-name>DispatcherServletservlet-name>
          <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
          <init-param>
              <param-name>contextConfigLocationparam-name>
                
              <param-value>classpath:applicationContext.xmlparam-value>
          init-param>
          <load-on-startup>1load-on-startup>
      servlet>
      <servlet-mapping>
          <servlet-name>DispatcherServletservlet-name>
          <url-pattern>/url-pattern>
      servlet-mapping>
   
      
      <filter>
          <filter-name>encodingFilterfilter-name>
          <filter-class>
             org.springframework.web.filter.CharacterEncodingFilter
          filter-class>
          <init-param>
              <param-name>encodingparam-name>
              <param-value>utf-8param-value>
          init-param>
      filter>
      <filter-mapping>
          <filter-name>encodingFilterfilter-name>
          <url-pattern>/*url-pattern>
      filter-mapping>
      
      
      <session-config>
          <session-timeout>15session-timeout>
      session-config>
      
   web-app>
   

2. spring-mvc.xml

   
   <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">
   
      
      
      <mvc:annotation-driven />
      
      <mvc:default-servlet-handler/>
   
      
      <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>
   
      
      <context:component-scan base-package="com.controller" />
   
   beans>
   

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

   
   <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

7. Controller 和 视图层编写

1. BookController 类编写 ， 方法一：查询全部书籍

   @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. 编写首页 index.jsp

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

   <%@ 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">
      
      <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

   @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

   <%@ 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">
      
      <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>
   

6. BookController 类编写 ， 方法三：修改书籍

   @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" %>
   <html>
   <head>
      <title>修改信息title>
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      
      <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>
   

8. BookController 类编写 ， 方法四：删除书籍

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

• 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