SSM整合案例

2023-11-22 18:51:10

SSM项目编程思路

项目准备

1、 分析需求，根据需求创建相应数据库 （基本sql语句）
​
2、 创建Maven项目，配置pom.xml，导入相应jar包 （mvn仓库），需要再Artifacts手动创建lib目录将jar包部署
​
3、 根据数据库创建相应pojo，搭建日志环境Log4j   （Book lombok插件 log4j.properties）

Dao层

4、 根据业务需求创建接口，编写增删改查的方法  （BookMapper）
​
5、 编写BookMapper.xml配置文件，编写sql语句，实现BookMapper接口中的功能。 （BookMapper.xml）
​
6、 编写mybatis-config.xml配置文件，设置别名、绑定mapper等  （mybatis.xml）
​
7、 编写spring-dao.xml配置文件，创建sqlSession，有多种方法，本案例采用继承SqlSessionDaoSupport，
    给BookMapperImpl注入sqlSessionFactory，dataSource也有多种方法，c3p0/druid/spring-jdbc等，
    本案例采用spring-jdbc，另外将pojo类交由spring-dao管理 （spring-dao.xml）
    
8、 编写BookMapper接口实现类，用java实现BookMapper.xml中的sql （BookMapperImpl.xml）

Service层

9、 编写BookService接口，写入需要实现的业务 （BookService）
​
10、编写BookService实现类，实现方法，此处需要组合BookMapper （BookServiceImpl）
​
11、编写spring-service.xml，并将service层类交由其管理，此处需要注入BookMapper，
    @Resource先根据名字注入，不匹配再按照类型注入，@Autowire那类型注入，可以和@Qualifier搭配使用 （spring-service.xml）

Controller层

12、编写web.xml配置DispatcherServlet和CharacterEncodingFilter，后者主要解决前端与后端的数据乱码问题，
    DispatcherServlet主要用作职责调度工作，本身主要用于控制流程，主要职责如下：
​
①、文件上传解析，如果请求类型是multipart将通过MultipartResolver进行文件上传解析；
​
②、通过HandlerMapping，将请求映射到处理器（返回一个HandlerExecutionChain，它包括一个处理器、多个HandlerInterceptor拦截器）；
​
③、通过HandlerAdapter支持多种类型的处理器(HandlerExecutionChain中的处理器)；
​
④、通过ViewResolver解析逻辑视图名到具体视图实现；
​
⑤、本地化解析；
​
⑥、渲染具体的视图等；
​
⑦、如果执行过程中遇到异常将交给HandlerExceptionResolver来解析。  （web.xml）
​
13、编写spring-mvc.xml配置视图层InternalViewResolver，注入前缀后缀，开启扫描注解context和mvn的均要开启以及开启对静态资源的访问。 （spring-mvc.xml）
​
14、编写Controller通过@Controller和return “页面名称”以及@RequestMapping实现对页面的访问，此外需要注入bookService，
    同上，可以通过@Resource、@Autowire和@Qualifier搭配使用实现注入。 （Controller）
  
15、根据业务内容去编写前端页面，可以参考***Bootstrao可视化系统***
    
16、配置Tomcat服务器，fix项目的Artifacts即可。
​
​

SSM环境搭建

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');

pom.xml

<?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>org.example</groupId>
    <artifactId>booksystem</artifactId>
    <version>1.0-SNAPSHOT</version>
​
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
​
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.5</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.17</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.4</version>
        </dependency>
        <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>2.1</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.6</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>
​
    <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>
​
</project>

log4j.properties

#将等级为DEBUG的日志信息输出到console和file这两个目的地，console和file的定义在下面的代码
log4j.rootLogger=DEBUG,console,file
​
#控制台输出的相关设置
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.Threshold=DEBUG
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=[%c]-%m%n
​
#文件输出的相关设置
log4j.appender.file = org.apache.log4j.RollingFileAppender
log4j.appender.file.File=./log/beal.log
log4j.appender.file.MaxFileSize=10mb
log4j.appender.file.Threshold=DEBUG
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=[%p][%d{yy-MM-dd}][%c]%m%n
​
#日志输出级别
log4j.logger.org.mybatis=DEBUG
log4j.logger.java.sql=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

Book.java

package com.beal.pojo;
​
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
​
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Book {
    private int bookID;
    private String bookName;
    private Integer bookCounts;
    private String detail;
}

BookMapper.java

package com.beal.dao;

import com.beal.pojo.Book;
import org.apache.ibatis.annotations.Param;

import java.util.List;

/**
 * @author BealQin
 * @create 2021-06-07 19:20
 */
public interface BookMapper {

    /**
     * select all books
     *
     * @return
     */
    public List<Book> queryAllBooks();

    /**
     * add a Book
     *
     * @param book
     * @return
     */
    public int addBook(Book book);

    /**
     * delete a book
     *
     * @param id
     * @return
     */
    public int deleteBook(@Param("bookid") int id);

    /**
     * update a book
     * @param book
     * @return
     */
    public int updateBook(Book book);

    /**
     *
     * @param id
     * @return
     */
    public Book queryForOneBook(@Param("id") int id);
}

BookMapper.xml

<?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.beal.dao.BookMapper">

    <select id="queryAllBooks" resultType="book">
        select *
        from books
    </select>

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


    <delete id="deleteBook" parameterType="int">
        delete
        from books
        where bookID = #{bookid};
    </delete>

    <update id="updateBook" parameterType="book">
        update books
        set bookName   = #{bookName},
            bookCounts = #{bookCounts},
            detail     = #{detail}
        where bookID = #{bookID};
    </update>

    <select id="queryForOneBook" parameterType="int" resultType="book">
        select *
        from books
        where bookID = #{id};
    </select>
</mapper>

BookMapperImpl.java

package com.beal.dao;

import com.beal.pojo.Book;
import org.mybatis.spring.support.SqlSessionDaoSupport;

import java.util.List;

/**
 * @author BealQin
 * @create 2021-06-08 16:11
 */
public class BookMapperImpl extends SqlSessionDaoSupport implements BookMapper{
    @Override
    public List<Book> queryAllBooks() {
        return getSqlSession().getMapper(BookMapper.class).queryAllBooks();
    }

    @Override
    public int addBook(Book book) {
        return getSqlSession().getMapper(BookMapper.class).addBook(book);
    }

    @Override
    public int deleteBook(int id) {
        return getSqlSession().getMapper(BookMapper.class).deleteBook(id);
    }

    @Override
    public int updateBook(Book book) {
        return getSqlSession().getMapper(BookMapper.class).updateBook(book);
    }

    @Override
    public Book queryForOneBook(int id) {
        return getSqlSession().getMapper(BookMapper.class).queryForOneBook(id);
    }
}

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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="book" class="com.beal.pojo.Book"/>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url"
                  value="jdbc:mysql://localhost:3306/ssmbuilds?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8"/>
        <property name="username" value="root"/>
        <property name="password" value="055134"/>
    </bean>

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>


    <bean id="bookMapper" class="com.beal.dao.BookMapperImpl">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>

</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>

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

</configuration>

DaoTest.java

package com.beal.dao;

import com.beal.pojo.Book;
import org.mybatis.spring.support.SqlSessionDaoSupport;

import java.util.List;

/**
 * @author BealQin
 * @create 2021-06-08 16:11
 */
public class BookMapperImpl extends SqlSessionDaoSupport implements BookMapper{
    @Override
    public List<Book> queryAllBooks() {
        return getSqlSession().getMapper(BookMapper.class).queryAllBooks();
    }

    @Override
    public int addBook(Book book) {
        return getSqlSession().getMapper(BookMapper.class).addBook(book);
    }

    @Override
    public int deleteBook(int id) {
        return getSqlSession().getMapper(BookMapper.class).deleteBook(id);
    }

    @Override
    public int updateBook(Book book) {
        return getSqlSession().getMapper(BookMapper.class).updateBook(book);
    }

    @Override
    public Book queryForOneBook(int id) {
        return getSqlSession().getMapper(BookMapper.class).queryForOneBook(id);
    }
}

BookService.java

package com.beal.service;

import com.beal.pojo.Book;

import java.util.List;

/**
 * @author BealQin
 * @create 2021-06-07 21:46
 */
public interface BookService {

    /**
     * add a book
     *
     * @param book
     */
    public void addBook(Book book);

    /**
     * delete a book
     *
     * @param id
     */
    public void deleteBook(int id);

    /**
     * update a book
     *
     * @param book
     */
    public void updateBook(Book book);

    /**
     * query a book
     *
     * @param id
     * @return
     */
    public Book queryForOneBook(int id);

    /**
     * query all books
     *
     * @return
     */
    public List<Book> queryAllBooks();

}

BookServiceImpl.java

package com.beal.service;

import com.beal.dao.BookMapper;
import com.beal.pojo.Book;

import java.util.List;

/**
 * @author BealQin
 * @create 2021-06-07 21:46
 */
public class BookServiceImpl implements BookService {

    private BookMapper bookMapper;

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

    @Override
    public void addBook(Book book) {
        bookMapper.addBook(book);
    }

    @Override
    public void deleteBook(int id) {
        bookMapper.deleteBook(id);
    }

    @Override
    public void updateBook(Book book) {
        bookMapper.updateBook(book);
    }

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

    @Override
    public List<Book> queryAllBooks() {
        return bookMapper.queryAllBooks();
    }
}

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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">


    <bean id="bookServiceImpl" class="com.beal.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

</beans>

ServiceTest.java

package com.beal.service;

import com.beal.dao.BookMapper;
import com.beal.pojo.Book;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

/**
 * @author BealQin
 * @create 2021-06-08 16:27
 */
public class ServiceTest {
    @Test
    public void test1(){

        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        BookService bookServiceImpl = (BookService) context.getBean("bookServiceImpl");
        List<Book> bookList = bookServiceImpl.queryAllBooks();
        for (Book book : bookList) {
            System.out.println(book);
        }
    }
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <!--DispatcherServlet-->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--一定要注意:我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>

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvn="http://www.springframework.org/schema/mvc"
       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/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <mvn:annotation-driven/>
    <mvn:default-servlet-handler/>

    <context:component-scan base-package="com.beal.controller"/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

Controller.java

package com.beal.controller;

import com.beal.pojo.Book;
import com.beal.service.BookService;
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.RequestMapping;

import javax.annotation.Resource;
import java.util.List;

/**
 * @author BealQin
 * @create 2021-06-08 16:29
 */
@Controller
@RequestMapping("/book")
public class BookController {

//    @Resource(name = "bookServiceImpl")
    @Autowired
    @Qualifier(value = "bookServiceImpl")
    private BookService bookService;

    @RequestMapping("/allBook")
    public String test1(Model model) {
        List<Book> bookList = bookService.queryAllBooks();
        model.addAttribute("list", bookList);
        return "allBook";
    }

    @RequestMapping("/editBook")
    public String editBook() {

        return "editBook";
    }

    @RequestMapping("/addBook")
    public String addBook(Book book) {

        bookService.addBook(book);

        return "redirect:/book/allBook";
    }

    @RequestMapping("/deleteBook")
    public String deleteBook(Integer bookID) {

        bookService.deleteBook(bookID);

        return "redirect:/book/allBook";
    }

    @RequestMapping("/update")
    public String update(){
        return "update";
    }

    @RequestMapping("/updateBook")
    public String updateBook(Book book) {
        bookService.updateBook(book);
        return "redirect:/book/allBook";
    }

}

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">


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

</beans>

前端页面

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>欢迎页</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>
<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
<blockquote class="blockquote text-center">
    <p class="mb-0">A well-known quote, contained in a blockquote element.</p>
    <footer class="blockquote-footer">Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
<p class="text-center">

    <a href="${pageContext.request.contextPath}/book/allBook" class="btn btn-primary btn-lg">进入图书管理系统</a>

</p>
</body>
</html>

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">
    <!-- 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/editBook">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="${list}">
                    <tr>
                        <td>${book.bookID}</td>
                        <td>${book.bookName}</td>
                        <td>${book.bookCounts}</td>
                        <td>${book.detail}</td>
                        <td>
                            <a href="${pageContext.request.contextPath}/book/update?bookID=${book.bookID}&bookName=${book.bookName}&bookCounts=${book.bookCounts}&detail=${book.detail}">更改</a>
                            |
                            <a href="${pageContext.request.contextPath}/book/deleteBook?bookID=${book.bookID}">删除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>

editBook.jsp

<%--
  Created by IntelliJ IDEA.
  User: Beal Qin
  Date: 2021/6/8
  Time: 20:40
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加图书</title>
</head>
<body>

<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
<p class="text-center">

<form action="${pageContext.request.contextPath}/book/addBook" method="get">
    <div class="form-group" align="center">
        <label>书籍名字</label>
        <input type="text" class="form-control" name="bookName" value="${param.bookName}" required>
    </div>
    <div class="form-group" align="center">
        <label>书籍数量</label>
        <input type="text" class="form-control" name="bookCounts" value="${param.bookCounts}" required>
    </div>
    <div class="form-group" align="center">
        <label>书籍详情</label>
        <input type="text" class="form-control" name="detail" value="${param.detail}" required>
    </div>

    <div align="center">
        <button type="submit" class="btn btn-default">添加</button>
    </div>
</form>


</p>


</body>
</html>

updateBook.jsp

<%--
  Created by IntelliJ IDEA.
  User: Beal Qin
  Date: 2021/6/8
  Time: 20:40
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改书籍</title>
</head>
<body>

<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
<p class="text-center">

<form action="${pageContext.request.contextPath}/book/updateBook" method="get">
    <input type="hidden" name="bookID" value="${param.bookID}">
    <div class="form-group" align="center">
        <label>书籍名字</label>
        <input type="text" class="form-control" name="bookName" value="${param.bookName}" required>
    </div>
    <div class="form-group" align="center">
        <label>书籍数量</label>
        <input type="text" class="form-control" name="bookCounts" value="${param.bookCounts}" required>
    </div>
    <div class="form-group" align="center">
        <label>书籍详情</label>
        <input type="text" class="form-control" name="detail" value="${param.detail}" required>
    </div>

    <div align="center">
        <button type="submit" class="btn btn-default">修改</button>
    </div>
</form>

</p>


</body>
</html>

注意小细节

① 给工程Artifacts添加lib目录将包导入
② 项目的默认maven版本要进行修改
③ tomcat配置时，无需其他操作，fix模块就行
④ 配置DispatcherServlet的初始参数时，文件应选择applicationContext.xml，不选择spring-mvc.xml
⑤ 前端页面传回对象的属性时，Controller层可以用对象接收，字段名不匹配时则为空。
⑥ BeanCreateException出现在sqlSessionFactory时，尝试把数据库连接工作交给mybatis-config.xml管理，
  就避开了sqlSessionFactory问题了。(参考如下xml文件)
待补充。。。

mybatis-config.xml （管理数据库连接）

<?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.beal.pojo"/>
    </typeAliases>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url"
                          value="jdbc:mysql://localhost:3306/ssmbuilds?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8"/>
                <property name="username" value="root"/>
                <property name="password" value="055134"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="com/beal/dao/BookMapper.xml"/>
    </mappers>

</configuration>

spring-dao.xml (不管理dataSource)

<?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">

    <bean id="book" class="com.beal.pojo.Book"/>

    <bean id="bookMapper" class="com.beal.dao.BookMapperImpl"/>

</beans>

 

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