整合SSM框架

整合SSM

注意：启动 Tomcat 前，一定要添加 lib 依赖。

---

环境要求

环境：

• IDEA (JDK 12)

• MySQL 5.7

• Tomcat 9

• Maven 3.5.4

  要求：需要熟练掌握MySQL数据库，Spring，JavaWeb及MyBatis知识，简单的前端知识

数据库环境

创建一个存放书籍数据的数据库表

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

DROP TABLE IF EXISTS `books`;

CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
`bookCounts` INT(11) NOT NULL COMMENT '数量',
`detail` VARCHAR(200) NOT NULL COMMENT '描述',
KEY `bookID` (`bookID`)
) ENGINE=INNODB DEFAULT CHARSET=utf8

INSERT  INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES 
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');

基本环境搭建

1 新建一Maven项目！ssmbuild ， 添加web的支持

project: ssmbuild

2 导入相关的pom依赖！

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>com.allen</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-->
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
        </dependency>

        <!--  LOG4J-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <!--数据库连接池-->
        <!-- https://mvnrepository.com/artifact/com.mchange/c3p0 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.5</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>3.0-alpha-1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
            <scope>provided</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.4</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.1</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.16</version>
        </dependency>

    </dependencies>

    <!--在build中配置resources，防止资源导出失败-->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.yml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.yml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>

</project>

3 Maven资源过滤设置

在第2步已配置

    <!--在build中配置resources，防止资源导出失败-->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.yml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.yml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>

4 建立基本结构和配置框架

• com.allen.pojo (java)
• com.allen.dao (java)
• com.allen.service (java)
• com.allen.controller (java)
• mybatis-config.xml (resources)

<?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 (resources)

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

</beans>

Mybatis层编写

1 数据库配置文件 database.properties

jdbc.driver=com.mysql.jdbc.Driver
# 如果使用的是MySQL8.0+,需要加上时区设置，serverTimezone=Asia/Shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=1005

2 IDEA关联数据库

3 编写MyBatis的核心配置文件

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>

    <!--配置数据源，交给Spring去做-->

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

    <typeAliases>
        <package name="com.allen.pojo"/>
    </typeAliases>

    <!--将接口绑定到配置文件中-->
    <mappers>
        <mapper class="com.allen.dao.BookMapper"/>
    </mappers>
</configuration>

4 编写数据库对应的实体类 com.allen.pojo.Books

使用lombok插件

package com.allen.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author Allen
 * @date 2020/12/2 15:18
 */

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {

    private int bookId;
    private String bookName;
    private int bookCounts;
    private String detail;
}

5 编写Dao 层

Dao 层的 Mapper接口 BookMapper

package com.allen.dao;

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

import java.util.List;

/**
 * @author Allen
 * @date 2020/12/2 15:21
 */
public interface BookMapper {

    int addBook(Books books);

    int deleteBookById(@Param("bookId") int id);

    int updateBook(Books books);

    Books queryBookById(@Param("bookId") int id);

    List<Books> queryAllBooks();

    Books queryBookByName(@Param("bookName") String name);
}

接口对应的 Mapper.xml 文件 BookMapper.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.allen.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="queryAllBooks" resultType="books">
        select * from ssmbuild.books;
    </select>

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

</mapper>

6 编写 service 层

service 层接口 BookService

package com.allen.service;

import com.allen.pojo.Books;

import java.util.List;
import java.util.Map;

/**
 * @author Allen
 * @date 2020/12/2 15:43
 */
public interface BookService {
    int addBook(Books books);

    int deleteBookById(int id);

    int updateBook(Books books);

    Books queryBookById(int id);

    List<Books> queryAllBooks();

    Books queryBookByName(String name);
}

service 层实现类 BookServiceImpl

package com.allen.service;

import com.allen.dao.BookMapper;
import com.allen.pojo.Books;

import java.util.List;

/**
 * @author Allen
 * @date 2020/12/2 15:45
 */
public class BookServiceImpl implements BookService {

    //service 层调用 dao 层
    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> queryAllBooks() {
        return bookMapper.queryAllBooks();
    }

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

OK，到此，底层需求操作编写完毕！

Spring层

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，无法自动连接
            c3p0:   自动化操作（自动化加载配置文件，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="${jdbc.username}"/>
        <property name="password" value="${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.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，动态实现了dao接口可以注入到Spring接口中-->
    <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.allen.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">

    <!--    1.扫描service下的包-->
    <context:component-scan base-package="com.allen.service"/>

    <!--    2.将所有业务类注入到Spring ,通过配置或注解实现-->
    <bean id="BookServiceImpl" class="com.allen.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>

    <!--    AOP事务支持-->

</beans>

Spring层搞定！再次理解一下，Spring就是一个大杂烩，一个容器！

SpringMVC层

1 web.xml

<init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</init-param>

注意：classpath:applicationContext.xml

一定是导入了其他配置文件的总的配置文件。

<?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">

    <!--    1.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>

    <!--    2.过滤器-->
    <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 :超时配置15分钟-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

2 springmvc.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:mvc="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">


<!--    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.allen.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>
</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:springmvc.xml"/>
</beans>

配置文件，暂时结束！

Controller 和 视图层编写

1 BookController 类编写

• 方法一：查询全部书籍
• 方法二：添加书籍
• 方法三：修改书籍
• 方法四：删除书籍
• 方法五：查询书籍

package com.allen.controller;

import com.allen.pojo.Books;
import com.allen.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 java.util.ArrayList;
import java.util.List;


/**
 * @author Allen
 * @date 2020/12/2 17:00
 */
@Controller
@RequestMapping("/book")    //方便业务扩展
public class BookController {
    //Controller 层调用 Service 层
    @Autowired
    @Qualifier("BookServiceImpl")
    private BookService bookService;

    //跳转到所有书籍界面
    @RequestMapping("/allbook")
    public String list(Model model){
        List<Books> books = bookService.queryAllBooks();

        model.addAttribute("list",books);
        return "/allbook";
    }

    //跳转到添加书籍界面
    @RequestMapping("/addBook")
    public String toAddBook(){

        return "/addBook";
    }

    //提交新增书籍，并重定向回所有书籍界面
    @RequestMapping("/addbook")
    public String addBook(Books books){
        bookService.addBook(books);
        return "redirect:/book/allbook";
    }

    //跳转到修改页面
    @RequestMapping("/updateBook")
    public String toUpdateBook(int id,Model model){
        Books book = bookService.queryBookById(id);
        model.addAttribute("book",book);
        return "/updateBook";
    }

    //修改书籍，并重定向回所有书籍界面
    @RequestMapping("/updatebook")
    public String updateBook(Books books){
        bookService.updateBook(books);
        return "redirect:/book/allbook";
    }


    //删除书籍，并重定向回此界面
    @RequestMapping("/deleteBook")
    public String deleteBook(int id){
        bookService.deleteBookById(id);
        return "redirect:/book/allbook";
    }

    //查询书籍
    @RequestMapping("/queryBook")
    public String queryBook(String bookName, Model model){
        Books book = bookService.queryBookByName(bookName);
        System.out.println(book);
        ArrayList<Books> list = new ArrayList<>();
        list.add(book);
        model.addAttribute("list",list);
        return "/allbook";
    }

}

2 编写首页 index.jsp

<%--
  Created by IntelliJ IDEA.
  User: Allen
  Date: 2020/12/2
  Time: 16:42
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<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">进入书籍界面</a>
  </h3>


  </body>
</html>

3 书籍列表页面 allbook.jsp

<%--
  Created by IntelliJ IDEA.
  User: Allen
  Date: 2020/12/2
  Time: 17:05
  To change this template use File | Settings | File Templates.
--%>
<%@ 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 -->
    <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><center>书籍列表 —— 显示所有书籍</center></small>
                </h1>
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-md-4 column">
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/addBook">新增</a>
        </div>
        <div class="col-md-4 column"></div>
        <div class="col-md-8 column">
            <form action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right">
                <input type="text" name="bookName" class="from-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 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/updateBook?id=${book.bookId}">更改</a>
                                &nbsp;| &nbsp;
                                <a href="${pageContext.request.contextPath}/book/deleteBook?id=${book.bookId}">删除</a>
                            </td>
                        </tr>
                    </c:forEach>
                </tbody>

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

4 添加书籍页面 addBook.jsp

<%--
  Created by IntelliJ IDEA.
  User: Allen
  Date: 2020/12/2
  Time: 21:32
  To change this template use File | Settings | File Templates.
--%>
<%@ 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>

        <%--    required可强制  输入值不为空，否则报错  --%>
    <form action="${pageContext.request.contextPath}/book/addbook" method="post">
        书籍名称：<input type="text" name="bookName" required><br><br><br>
        书籍数量：<input type="text" name="bookCounts" required><br><br><br>
        书籍详情：<input type="text" name="detail" required><br><br><br>
        <input type="submit" value="添加">
    </form>

</div>

5 修改书籍界面 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="${pageContext.request.contextPath}/book/updatebook" method="post">
        <input type="hidden" name="bookId" value="${book.bookId}"/>
        书籍名称：<input type="text" name="bookName" value="${book.bookName}"/>
        书籍数量：<input type="text" name="bookCounts" value="${book.bookCounts}"/>
        书籍详情：<input type="text" name="detail" value="${book.detail}"/>
        <input type="submit" value="修改"/>
    </form>

</div>

日志配置

1 导入依赖

<!--  LOG4J-->
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

2 编写配置文件 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/allen.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]allen:[%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

3 mybatis-config.xml 设置日志实现

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

项目结构

界面展示

数据库

首页

所有书籍

新增书籍

修改书籍

查询书籍