整合SSM笔记

2023-11-24 09:23:58

整合SSM

SSM：分别是Mybatis、Spring和SpringMVC

环境要求

  • IDEA 2019.2.4
  • MySQL 5.7.33
  • Tomcat 9.0.11
  • Maven 3.6.1

要求：

  • 需要熟练掌握MySQL数据库，Spring，JavaWeb以及MyBatis知识，简单的前端知识；

1、搭建数据库环境

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');

2、基本环境搭建

  1. 新建Maven项目！名字为ssmbuild，添加web的支持

  2. 导入相关的pom依赖，还有处理Maven静态资源导出问题

    <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zzzzzy</groupId>
    <artifactId>ssmbuild</artifactId>
    <version>1.0-SNAPSHOT</version>

    <!--依赖：junit，数据库驱动，连接池，servlet，jsp，mybatis，mybatis-spring，spring，lombok-->
    <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: c3p0    dbcp-->
        <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>

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

        <!-- log4j -->
        <!--<dependency>-->
        <!--    <groupId>log4j</groupId>-->
        <!--    <artifactId>log4j</artifactId>-->
        <!--    <version>1.2.17</version>-->
        <!--</dependency>-->
        
        <!-- jackson;json解析器-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.8</version>
        </dependency>
        
        <!-- 阿里fastjson;-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.60</version>
        </dependency>

    </dependencies>

    <!--静态资源导出问题-->
    <!--在build中配置resources，来防止我们资源导出失败的问题-->
    <build>
        <resources>
            <resource>
                <directory>src/main/resourse</directory>
                <excludes>
                    <exclude>**/*.properties</exclude>
                    <exclude>**/*.xml</exclude>
                </excludes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>

</project>

  3. 建立基本结构和配置框架

    • com.zzzzzy.pojo

    • com.zzzzzy.dao

    • com.zzzzzy.service

    • com.zzzzzy.controller

    • 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-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>

    • 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">

</web-app>

  4. 在Project Structure → Artifacts → Output Layout中，在WEB-INF下新建文件夹lib，在lib文件夹中添加Library File添加依赖文件

3、Mybatis层

  1. 数据库配置文件 database.properties

    # 如果使用的是MySQL8.0， 还要增加一个时区的配置   &serverTimezone=Asia/Shanghai，还有driver那边要改成com.mysql.cj.jdbc.Driver
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.user=root
jdbc.password=123456

  2. IDEA关联数据库，记住要设置时区

  3. 编写MyBatis的核心配置文件：mybatis-config.xml

    <settings>
    <setting name="logImpl" value="STDOUT_LOGGING"/>
    <!--<setting name="logImpl" value="LOG4J"/>-->
</settings>

<!--配置数据源，交给Spring去做-->

<typeAliases>
    <package name="com.zzzzzy.pojo"/>
</typeAliases>
<mappers>
    <mapper class="com.zzzzzy.dao.BookMapper"/>
</mappers>

  4. 编写数据库对应的实体类com.zzzzzy.pojo.Books

    使用lombok插件

    Books.java

    @Data
@NoArgsConstructor
@AllArgsConstructor
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;

}

  5. 编写Dao层的Mapper接口

    BookMapper

    public interface BookMapper {


    // 增加一本书
    int addBook(Books books);

    // 删除一本书
    int deleteBookById(@Param("bookId") int id);

    // 更新一本书
    int updateBook(Books books);

    // 查询一本书
    Books queryBookById(@Param("bookId") int id);

    // 查询全部书
    List<Books> queryAllBook();
    
    Books queryBookByName(@Param("bookName") String bookName);
}

  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 Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zzzzzy.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>

    <select id="queryBookByName" resultType="Books">
        select * from ssmbuild.books
        where bookName=#{bookName}
    </select>

</mapper>

  7. 编写Service层的接口和实现类

    接口，BookService：

    public interface BookService {


    // 增加一本书
    int addBook(Books books);

    // 删除一本书
    int deleteBookById(int id);

    // 更新一本书
    int updateBook(Books books);

    // 查询一本书
    Books queryBookById(int id);

    // 查询全部书
    List<Books> queryAllBook();

    Books queryBookByName(String bookName);
}

    实现类，BookServiceImpl.java

    public class BookServiceImpl implements BookService {

    private BookMapper bookMapper;

    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

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

    @Override
    public int deleteBookById(int id) {
        return bookMapper.deleteBookById(id);
    }

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

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

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

    @Override
    public Books queryBookByName(String bookName) {
        return bookMapper.queryBookByName(bookName);
    }
}

到此，底层需求操作编写完成

4、Spring层

  1. 配置Spring整合MyBatis，这里我们数据源使用c3p0

  2. 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">

    <!--1. 关联数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"/>

    <!--2. 连接池
        dbcp: 半自动化操作，不能自动连接
        c3p0: 自动化操作（此动画的加载配置文件，并且可以自动设置到对象中！）
        druid ； hikari
    -->
    <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="${jdbc.user}"/>
        <property name="password" value="${jdbc.password}"/>

        <!-- c3p0连接池的私有属性 -->
        <!--初始化连接池大小-->
        <property name="initialPoolSize" value="10"/>
        <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. SQLSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--绑定Mybatis的配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--4. 配置dao接口扫描包，动态的实现了Dao接口可以注入到Spring容器中!-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--要扫描的dao包-->
        <property name="basePackage" value="com.zzzzzy.dao"/>
    </bean>

</beans>

  3. Spring整合service层

    spring-service.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">

    <!--扫描service下的包-->
    <context:component-scan base-package="com.zzzzzy.service"/>

    <!--2. 将我们的所有业务类，注入到Spring，可以通过配置，或者注解实现-->
    <bean id="BookServiceImpl" class="com.zzzzzy.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--3. 声明式事务配置-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--4. aop事务支持-->

</beans>

到此，Spring层搞定！Spring就是一个大杂烩，一个容器！！！

5、SpringMVC层

  1. web.xml

    <!--DispatchServlet-->
<servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<!--乱码过滤-->
<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>

<!--Sesion-->
<session-config>
    <session-timeout>15</session-timeout>
</session-config>

  2. spring-mvc.xml

    <!--1. 注解驱动-->
<mvc:annotation-driven/>
<!--2. 静态资源过滤-->
<mvc:default-servlet-handler/>
<!--3. 扫描包：controller-->
<context:component-scan base-package="com.zzzzzy.controller"/>
<!--4. 视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/jsp/"/>
    <property name="suffix" value=".jsp"/>
</bean>

<!--5. 乱码问题-->
<mvc:annotation-driven>
    <mvc:message-converters register-defaults="true">
        <bean class="org.springframework.http.converter.StringHttpMessageConverter">
            <constructor-arg value="UTF-8"/>
        </bean>
        <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
            <property name="objectMapper">
                <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
                    <property name="failOnEmptyBeans" value="false"/>
                </bean>
            </property>
        </bean>
    </mvc:message-converters>
</mvc:annotation-driven>

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

    <!--这里是总的配置-->
<import resource="classpath:spring-dao.xml"/>
<import resource="classpath:spring-service.xml"/>
<import resource="classpath:spring-mvc.xml"/>

配置文件，暂时结束！

开始Controller和视图层编写

  1. BookController类编写

    BookController.java

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

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

    // 查询全部的数据，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";
    }

    // 跳转到新增书籍页面
    @RequestMapping("/toAddBook")
    public String toAddPaper() {
        return "addBook";
    }

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

    // 跳转到修改页面
    @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";
    }

    // 通过 @PathVariable 可以将URL中占位符参数{xxx}绑定到处理器类的方法形参中@PathVariable(“xxx“)
    @RequestMapping("/del/{bookId}")
    public String deleteBook(@PathVariable("bookId") int id) {
        bookService.deleteBookById(id);
        return "redirect:/book/allBook";
    }

    // 查询书籍
    @RequestMapping("/queryBook")
    public String queryBook(String queryBookName, Model model){
        if(queryBookName == ""){
            return "redirect:/book/allBook";
        }
        Books books = bookService.queryBookByName(queryBookName);
        List<Books> list = new ArrayList<>();
        list.add(books);
        model.addAttribute("list", list);
        return "allBook";
    }

}

  2. 编写首页index.jsp

    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
  <title>首页</title>
  <style type="text/css">
    /*a（链接）标签内*/
    a{
      text-decoration: none;
      color: black;
      font-size: 18px;
    }

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

  3. 编写所有书籍展示页面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>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <%-- 引入 Bootstrap --%>
    <%--BootStrap美化界面--%>
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>

<div class="container">

    <%--清楚浮动--%>
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="path-header">
                <h1>
                    <small>书籍列表 —— 显式所有书籍</small>
                </h1>
            </div>
        </div>

        <div class="row">
            <div class="col-md-4 column">
                <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
            </div>
            <div class="col-md-4 column"></div>
            <div class="col-md-4 column">
                <%--查询书籍--%>
                <form action="${pageContext.request.contextPath}/book/queryBook"  method="post" style="float: right">
                    <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">
            <%--表格--%>
            <table class="table table-hover table-striped">

                <%--表头--%>
                <thead>
                <tr>    <%--行--%>
                    <th>书籍编号</th>
                    <%--列--%>
                    <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="${requestScope.get('list')}">  <%--jstl语句--%>
                    <tr>
                        <td>${book.getBookID()}</td>
                        <td>${book.getBookName()}</td>
                        <td>${book.getBookCounts()}</td>
                        <td>${book.getDetail()}</td>
                        <td>
                            <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a>
                            &nbsp; | &nbsp; <%--空格 竖线 空格--%>
                            <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>

</body>
</html>

  4. 编写添加书本的页面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">
    <!-- 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/allBook" 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>

  5. 编写更新书本的页面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">
    <!-- 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">

        <%--出现的问题：提交了修改的sql请求，但是修改失败，初次考虑是事务问题。配置好事务后，依旧失败--%>
        <%--看一下SQL语句，能否执行成功：SQL执行失败，修改为完成--%>
        <%--前端传递隐藏域--%>

        <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>

到此controller层和视图层编写完成

配置Tomcat，进行运行

VM options选项添加-Dfile.encoding=UTF-8，可以防止控制台输出中文乱码

项目结构图如下

编写项目顺序一般如下：

  1. 导入pom.xml的依赖
  2. Mybatis层
    • database.properties
    • mybatis-config.xml
    • Pojo实体类Books.java
    • Dao层的Mapper接口，BookMapper
    • 编写接口对应的xml文件，BookMapper.xml
    • Service层的接口，BookService
    • Service层接口对应的实现类，BookServiceImpl.java
  3. Spring层
    • 整合Mybatis层 spring-dao.xml
    • 整合Service层 spring-service.xml
  4. SpringMVC层
    • web.xml
    • spring-mvc.sml
    • applicationContext.xml
  5. Controller层和视图层
    • BookController.java
    • index.jsp、allBook.jsp、addBook.jsp、updateBook.jsp

整合SSM笔记

以上，就是我看b站遇见狂神说MySQL视频学习总结的笔记

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