SSM(Spring+SpringMVC+MyBatis)框架整合开发流程

回忆了 Spring、SpringMVC、MyBatis 框架整合，完善一个小demo，包括基本的增删改查功能。

开发环境

• IDEA
• MySQL 5.7
• Tomcat 9
• Maven 3.2.5
• 需要熟练掌握MySQL数据库（建表和增删改查语句等，Spring，JavaWeb基础及MyBatis知识，简单的前端知识；

数据库环境

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

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');

开发项目首先搭建基本的环境

1. 新建一Maven项目！SSM ， 添加web的支持
2. 导入相关的pom依赖！

<?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>jiachuixun</groupId>
    <artifactId>SSM</artifactId>
    <version>1.0-SNAPSHOT</version>

    <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>8.0.19</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>
        <!-- lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
            <scope>provided</scope>
        </dependency>
        <!--AOP 织入器-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.4</version>
        </dependency>
    </dependencies>
    
</project>

　　3.Maven资源过滤配置

<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>

建议基本结构和配置框架

• com.jia.controller    (控制层)
• com.jia.mapper     （持久层）
• com.jia.service      （业务层）
• com.jia.pojo           (实体类)

• mybatis-config

<?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层编写配置

1. 数据库配置文件 database.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
# 如果使用的是MySQL8.0+ ，增加一个时区的配置
jdbc.url=jdbc:mysql://localhost:3306/books?useSSL=true&useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
jdbc.username=root
jdbc.password=123456

2. 编写Mybatis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.jia.pojo"/>
    </typeAliases>
    <mappers>
        <package name="com.jia.mapper"/>
    </mappers>
</configuration>

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

package com.jia.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;
}

4. 编写mapper层的接口：BooksMapper

package com.jia.mapper;

import com.jia.pojo.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BooksMapper {

    //添加数据
    int addBooks(Books books);

    //删除数据
    int deleteBookById(@Param("bookId") int id);

    //更新数据
    int updateBook(Books books);

    //查询一条数据
    Books queryBookById(@Param("bookId") int id);

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

    //查询指定的书籍
    Books queryBooksByName(@Param("bookName") String bookName);

}

5. 编写接口对应的Mapper.xml文件：BooksMapper.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.jia.mapper.BooksMapper">

    <insert id="addBooks" parameterType="Books">
        insert into Books (bookName, bookCounts, detail)
        values (#{bookName},#{bookCounts},#{detail});
    </insert>

    <delete id="deleteBookById" parameterType="int">
         delete from Books where bookId = #{bookId};
    </delete>

    <update id="updateBook" parameterType="Books">
        update Books
        set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookId=#{bookId};
    </update>

    <select id="queryBookById" resultType="Books" parameterType="int">
        select * from Books where bookId=#{bookId};
    </select>

    <select id="queryAllBook" resultType="Books">
        select * from Books;
    </select>

    <select id="queryBooksByName" resultType="Books" parameterType="String">
        select * from books where bookName=#{bookName}
    </select>

</mapper>

6. 变写service层接口和实现类

BooksService接口：

package com.jia.service;

import com.jia.pojo.Books;

import java.util.List;

public interface BooksService {

    //添加数据
    int addBooks(Books books);

    //删除数据
    int deleteBookById(int id);

    //更新数据
    int updateBook(Books books);

    //查询一条数据
    Books queryBookById(int id);

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

    //查询指定的书籍
    Books queryBooksByName(String bookName);

}

BookServiceImpl实现类：

package com.jia.service.impl;

import com.jia.mapper.BooksMapper;
import com.jia.pojo.Books;
import com.jia.service.BooksService;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.List;

public class BooksServiceImpl implements BooksService {

    // 业务层 调用 持久层
    @Autowired
    private BooksMapper booksMapper;

    // 添加set方法，方便Spring注入IOC容器中
    public void setBooksMapper(BooksMapper booksMapper) {
        this.booksMapper = booksMapper;
    }

    public int addBooks(Books books) {
        return booksMapper.addBooks(books);
    }

    public int deleteBookById(int id) {
        return booksMapper.deleteBookById(id);
    }

    public int updateBook(Books books) {
        return booksMapper.updateBook(books);
    }

    public Books queryBookById(int id) {
        return booksMapper.queryBookById(id);
    }

    public List<Books> queryAllBook() {
        return booksMapper.queryAllBook();
    }

    public Books queryBooksByName(String bookName) {
        return booksMapper.queryBooksByName(bookName);
    }

}

Spring的配置

1. 配置Spring整合MyBatis，这里数据源使用c3p0连接池

2. 编写Spring整合MyBatis相关的配置，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.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）
                        druid  阿里巴巴出品
                        hikari SpringBoot默认
    -->
    <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}"/>
        <!-- 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mapper接口包，动态实现mapper接口注入到Spring容器中 -->
    <bean id="scannerConfigurer" 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.jia.mapper"/>
    </bean>

</beans>

3. Spring配置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"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/aop
       https://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">

    <bean id="booksService" class="com.jia.service.impl.BooksServiceImpl">
        <property name="booksMapper" ref="booksMapper"/>
    </bean>

    <!-- 扫描service相关的bean -->
    <context:component-scan base-package="com.jia.service"/>

    <!-- 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>

    <!--aop 事务支持-->
    <tx:advice id="txAdice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>
    <!--配置事务切入-->
    <aop:config>
        <!--切入点-->
        <aop:pointcut id="txPointCut" expression="execution(* com.jia.mapper.*.*(..))"/>
        <aop:advisor advice-ref="txAdice" pointcut-ref="txPointCut"/>
    </aop:config>

</beans>

SpringMVC层配置

1. 首先项目添加框架支持Web，修改WEB-INF文件下web.xml文件内容

<?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>
            <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. 配置编写 spring-mvc.xml 文件

<?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.过滤静态资源-->
    <mvc:default-servlet-handler/>

    <!-- 3.配置jsp 显示ViewResolver视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="resourceViewResolver">
        <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.jia.controller" />

    <!-- 5.json乱码问题-->
    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=UTF-8</value>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>
    
    <!-- 6.文件上传-->
    <!-- 定义文件解释器 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 设置默认编码 -->
        <property name="defaultEncoding" value="utf-8"/>
        <!-- 上传图片最大大小5M-->
        <property name="maxUploadSize" value="10485760"/>
        <property name="maxInMemorySize" value="40960"/>
    </bean>

</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="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:spring-mvc.xml"/>

</beans>

以上架构基本配置完成！剩下的就是编写需求实现具体的功能！

Controller 和 View

1. BookController 类编写

package com.jia.controller;

import com.jia.pojo.Books;
import com.jia.service.BooksService;
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 BooksController {

    // controller层 调用 service层
    @Autowired
    @Qualifier("booksService")
    private BooksService booksService;

    // 查询全部的数据，并且返回到一个数据展示页面
    @RequestMapping("/allBook")
    public String list(Model model){
        List<Books> books = booksService.queryAllBook();
        model.addAttribute("list",books);
        return "allBook";
    }

    // 跳转到添加书籍页面
    @RequestMapping("/toAddPaper")
    public String toAddPaper(){
        return "addBook";
    }

    // 添加书籍请求
    @RequestMapping("/addBook")
    public String addBook(Books books){
        System.out.println("addBook-->"+books);
        booksService.addBooks(books);
        return "redirect:/book/allBook";
    }

    // 跳转到修改页面
    @RequestMapping("/toUpdate")
    public String toUpdatePaper(int id,Model model){
        Books books = booksService.queryBookById(id);
        model.addAttribute("Qbook",books);
        return "updateBook";
    }

    // 修改书籍
    @RequestMapping("/updateBook")
    public String updateBook(Books books){
        System.out.println("updateBook-->"+books);
        booksService.updateBook(books);
        return "redirect:/book/allBook";
    }

    // 删除书籍
    @RequestMapping("/deleteBook/{bookId}")
    public String deleteBook(@PathVariable("bookId") int id){
        booksService.deleteBookById(id);
        return "redirect:/book/allBook";
    }

    // 查询书籍
    @RequestMapping("/queryBook")
    public String queryBook(String bookName,Model model){
        Books books = booksService.queryBooksByName(bookName);

        List<Books> list = new ArrayList<Books>();
        list.add(books);

        if (books == null){
           list = booksService.queryAllBook();
           model.addAttribute("error","未查到相关内容");
        }

        model.addAttribute( "list", list);
        return "allBook";
    }
}

2. 编写首页 index.jsp 　　(页面有点简陋，基本的功能都有CRUD)

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
    <style>
      a {
        text-decoration: none;
        color: black;
        font-size: 18px;
      }
      h3 {
         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">登录</a>
    </h3>
  </body>
</html>

2. 数据展示页面 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>书籍列表</title>
    <!-- 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 class="row">
            <div class="col-md-4 column">
                <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddPaper">添加书籍</a>
                <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部书籍</a>
            </div>
            <div class="col-md-4 column"></div>
            <div class="col-md-4 column">
               <%--查询书籍--%>
                <form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right">
                    <span style="color:red;font-weight: bold">${error}</span>
                    <input type="text" name="bookName" class="form-control" placeholder="查询书籍的名称">
                    <input type="submit" class="btn btn-primary" value="查询">
                </form>
            </div>
        </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="${list}">
                        <tr>
                            <td>${book.bookId}</td>
                            <td>${book.bookName}</td>
                            <td>${book.bookCounts}</td>
                            <td>${book.detail}</td>
                            <td>
                                <a href="${pageContext.request.contextPath}/book/toUpdate?id=${book.bookId}">修改</a>
                                &nbsp; | &nbsp;
                                <a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookId}">删除</a>
                            </td>
                        </tr>
                    </c:forEach>
                </tbody>
            </table>
        </div>
    </div>

</div>

3. 添加书籍页面 addBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加书籍</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>添加数据</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/addBook" method="post">
        <div class="form-group">
            <label>书籍名称</label>
            <input type="text" class="form-control" name="bookName" placeholder="输入书籍名称" required>
        </div>
        <div class="form-group">
            <label>书籍数量</label>
            <input type="text" class="form-control" name="bookCounts"  placeholder="输入书籍数量" required>
        </div>
        <div class="form-group">
            <label>书籍详情</label>
            <input type="text" class="form-control" name="detail" placeholder="输入书籍详情" required>
        </div>
        <button type="submit" class="btn btn-primary">添加</button>
    </form>

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

4. 修改书籍页面 updateBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改书籍</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>修改数据</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
        <%--前端传递隐藏域--%>
        <input type="hidden" name="bookId" value="${Qbook.bookId}"/>
        <div class="form-group">
            <label>书籍名称</label>
            <input type="text" class="form-control" name="bookName" value="${Qbook.bookName}" placeholder="输入书籍名称" required>
        </div>
        <div class="form-group">
            <label>书籍数量</label>
            <input type="text" class="form-control" name="bookCounts" value="${Qbook.bookCounts}" placeholder="输入书籍数量" required>
        </div>
        <div class="form-group">
            <label>书籍详情</label>
            <input type="text" class="form-control" name="detail" value="${Qbook.detail}" placeholder="输入书籍详情" required>
        </div>
        <button type="submit" class="btn btn-primary">修改</button>
    </form>

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

最后在IDEA里点击Tomcat服务器发布项目  OK完成！