SSM学习成果总结，图书管理系统进行三层整合

一：先看一下效果图

二：目录结构

 三：pojo

package com.zh.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;
}

四：dao

package com.zh.dao;

import com.zh.pojo.Books;
import java.util.List;

public interface BookMapper {
    void addBooks(Books books);

    List<Books> queryAllBook();

    Books queryBookById(int id);
    void updateBooks(Books books);
    void deleteBooks(int id);

}

<?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.zh.dao.BookMapper">
    <!--增加一个Book-->
    <insert id="addBooks" parameterType="Books">
        insert into ssmbuild.books(bookName,bookCounts,detail)
        values (#{bookName}, #{bookCounts}, #{detail})
    </insert>

    <!--查询全部Book-->
    <select id="queryAllBook" resultType="books">
        SELECT * from ssmbuild.books
    </select>

    <!--更新Book信息-->
    <select id="updateBooks" parameterType="Books">
       update ssmbuild.books
        set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail}
        where bookID = #{bookID}
    </select>
    <!--通过Id查询Book信息-->
    <select id="queryBookById"  resultType="Books">
        select  * from books where bookID = #{bookID}
    </select>

    <!--删除书籍信息-->
    <delete id="deleteBooks" parameterType="int">
        delete from books where bookID=#{bookID}
    </delete>

</mapper>

五：service

package com.zh.service;

import com.zh.pojo.Books;

import java.util.List;

public interface BookService {
    void addBooks(Books books);
    List<Books> queryAllBook();

    Books queryBookById(int id);
    void updateBooks(Books books);

    void deleteBooks(int id);
}

 @Service("bookServiceImpl")
public class BookServiceImpl implements BookService {

    @Autowired
    @Qualifier("bookMapper")
    private BookMapper bookMapper;
    public void addBooks(Books books) {
        bookMapper.addBooks(books);
    }

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



    public Books queryBookById(int id){
        Books books = bookMapper.queryBookById(id);
        return books;
    }

    public  void updateBooks(Books books){
         bookMapper.updateBooks(books);
    }

    public void deleteBooks(int id) {
        bookMapper.deleteBooks(id);
    }

}

六：controller

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

        @Autowired
        @Qualifier("bookServiceImpl")
        private BookService bookService;

        @RequestMapping("/allBook")
        public String list(Model model) {
            List<Books> list = bookService.queryAllBook();
            model.addAttribute("list", list);
            return "allbook";
        }



    @RequestMapping("/toAddBook")
    public String toAddPaper() {
        return "addBook";
    }

    @RequestMapping("/addBook")
    public String addPaper(Books books) {
        System.out.println(books);
        bookService.addBooks(books);
        return "redirect:/book/allBook";
    }


    @RequestMapping("/toUpdateBooks")
    public  String toUpdatePaper(Model model ,  int id){
        Books books = bookService.queryBookById(id);
        System.out.println(books);
        model.addAttribute("books", books);
        return "updateBooks";
    }

    @RequestMapping("/updateBooks")
    public String updatePaper(Model model , Books books){
        System.out.println("lalala"+books);
        bookService.updateBooks(books);
        Books books1 = bookService.queryBookById(books.getBookID());
        model.addAttribute("book", books1);
        return "redirect:/book/allBook";
    }


    @RequestMapping("/delete/{bookID}")
    public String deleteBooks(@PathVariable("bookID") int id ){
            bookService.deleteBooks(id);
            return "redirect:/book/allBook";
    }
}

七：resources

7.1:整合mybatis

<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">

<!--&lt;!&ndash;通过原始注解的方式需要对接口实现Impl的编写&ndash;&gt;
<context:component-scan base-package="com.zh.dao"></context:component-scan>-->

    <!--配置数据源-->
    <context:property-placeholder location="classpath:database.properties"></context:property-placeholder>
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driverClass}"/>
        <property name="user" value="${jdbc.user}"/>
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"/>
        <property name="password" value="${jdbc.password}"/>
        <!--定义连接池最大的容量-->
        <property name="maxPoolSize" value="${jdbc.maxPoolSize}"/>
        <!--定义连接池初始的大小-->
        <property name="initialPoolSize" value="${jdbc.initPoolSize}"/>
        <!-- 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>

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

    <!--通过这种方式不用写Impl的实现类-->
    <!--配置扫描Dao的接口包(用这种方式dao层连注解都不用写)-->
    <!--解释 ： https://www.cnblogs.com/jpfss/p/7799806.html-->
    <bean 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.zh.dao"/>
    </bean>

</beans>

<?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.zh.pojo"></package>
    </typeAliases>


    <mappers>
        <mapper resource="com/zh/dao/BookMapper.xml"/>
    </mappers>
</configuration>

7.2:整合service

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">



    <context:component-scan base-package="com.zh.service"></context:component-scan>
   <!-- <bean id="BookServiceImpl" class="com.zh.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>-->

    <!-- 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>


</beans>

7.3整合controller

<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">

    <!-- 配置SpringMVC -->
    <!-- 1.开启SpringMVC注解驱动 -->
    <mvc:annotation-driven />
    <!-- 2.静态资源默认servlet配置-->
    <mvc:default-servlet-handler/>

    <!-- 3.配置jsp 显示ViewResolver视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 4.扫描web相关的bean -->
    <context:component-scan base-package="com.zh.controller" />


</beans>

八：三层整合

<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>

九：jsp部分

<%@ 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/toAddBook">新增</a>
        </div>
    </div>

    <div class="row clearfix">
        <div class="col-md-12 column">
            <table class="table table-hover table-striped">
                <thead>
                <tr>
                    <th>书籍编号</th>
                    <th>书籍名</th>
                    <th>数量</th>
                    <th>书籍介绍</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/toUpdateBooks?id=${book.getBookID()}">更改</a> |
                            <a href="${pageContext.request.contextPath}/book/delete/${book.getBookID()}">删除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>

<%@ 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/addBook" method="post">
        书籍名称：<input type="text" name="bookName"><br><br><br>
        书籍数量：<input type="text" name="bookCounts"><br><br><br>
        书籍详情：<input type="text" name="detail"><br><br><br>
        <input type="submit" value="添加">
    </form>

</div>

<%@ 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="${pageContext.request.contextPath}/book/updateBooks" method="post">
        <input type="hidden" name="bookID" value="${books.getBookID()}"/>
        书籍名称：<input type="text" name="bookName" value="${books.getBookName()}"/>
        书籍数量：<input type="text" name="bookCounts" value="${books.getBookCounts()}"/>
        书籍详情：<input type="text" name="detail" value="${books.getDetail() }"/>
        <input type="submit" value="提交"/>
    </form>

</div>

十：web.xml

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <servlet>
        <servlet-name>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-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>