SSM整合（一个简单的图书管理系统的实现：增删改查基本功能的实现）

SSM整合

SSM ： SpringMvc + Spring + Mybatis！前端到后台我们就联系起来了！
一个简单的图书管理系统

1、环境准备

环境很重要

• IDEA
• MySQL 5.7.19
• Maven 3.6.1
• Tomcat 9

2、数据库准备

创建一个存放书籍的数据库表

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

NSERT  INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES 
(1,'一个优秀打野的自我修养',250,'一定要打着抓人的幌子脏队友兵线'),
(2,'一只蓝buff的悲惨经历',380,'没有什么问题是挨一顿毒打解决不了的'),
(3,'悲惨英雄为何沦落为超级兵',666,'说多了都是眼泪');

3、项目基本结构的搭建

项目的基本环境，基本架构

• 新建一个maven项目，添加WEB框架，导入pom依赖

<dependencies>
    <dependency>
        <groupId>org.projectlombokgroupId>
        <artifactId>lombokartifactId>
        <version>1.18.12version>
    dependency>
    
    <dependency>
        <groupId>junitgroupId>
        <artifactId>junitartifactId>
        <version>4.12version>
    dependency>
    
    <dependency>
        <groupId>mysqlgroupId>
        <artifactId>mysql-connector-javaartifactId>
        <version>5.1.47version>
    dependency>
    
    <dependency>
        <groupId>com.mchangegroupId>
        <artifactId>c3p0artifactId>
        <version>0.9.5.2version>
    dependency>

    
    <dependency>
        <groupId>javax.servletgroupId>
        <artifactId>servlet-apiartifactId>
        <version>2.5version>
    dependency>
    <dependency>
        <groupId>javax.servlet.jspgroupId>
        <artifactId>jsp-apiartifactId>
        <version>2.2version>
    dependency>
    <dependency>
        <groupId>javax.servletgroupId>
        <artifactId>jstlartifactId>
        <version>1.2version>
    dependency>

    
    <dependency>
        <groupId>org.mybatisgroupId>
        <artifactId>mybatisartifactId>
        <version>3.5.2version>
    dependency>
    <dependency>
        <groupId>org.mybatisgroupId>
        <artifactId>mybatis-springartifactId>
        <version>2.0.2version>
    dependency>

    
    <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-webmvcartifactId>
        <version>5.1.9.RELEASEversion>
    dependency>
    <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-jdbcartifactId>
        <version>5.1.9.RELEASEversion>
    dependency>
dependencies>

• 添加maven资源过滤

<build>
    <resources>
        <resource>
            <directory>src/main/javadirectory>
            <includes>
                <include>**/*.propertiesinclude>
                <include>**/*.xmlinclude>
            includes>
            <filtering>falsefiltering>
        resource>
        <resource>
            <directory>src/main/resourcesdirectory>
            <includes>
                <include>**/*.propertiesinclude>
                <include>**/*.xmlinclude>
            includes>
            <filtering>falsefiltering>
        resource>
    resources>
build>

• 基本的架构

  • com.gang.dao
  • com.gang.pojo
  • com.gang.service
  • com.gang.controller

前端---->接受请求(controller)---->service---->mapper---->操作数据库

3.1、编写Pojo层数据库对应的实体类

package com.gang.pojo;

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

/*
Description:实体类
Author:32259
Time:2020二月2020/2/2716:19
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {


    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;

}

3.2、编写Dao层的 Mapper接口

package com.gang.dao;

/*
Description:Mapper接口
Author:32259
Time:2020二月2020/2/2716:20
*/

import com.gang.pojo.Books;

import java.util.List;

public interface BookMapper {

    //增加一个Book
    int addBook(Books book);

    //根据id删除一个Book
    int deleteBookById(int id);

    //更新Book
    int updateBook(Books books);

    //根据id查询,返回一个Book
    Books queryBookById(int id);

    //查询全部Book,返回list集合
    List<Books> queryAllBook();

	//根据书名查询数据
    Books queryBooksByName(String bookName);

}

3.3、编写Service层的接口和实现类

接口：

package com.gang.service;

/*
Description:接口
Author:32259
Time:2020二月2020/2/2716:23
*/


import com.gang.pojo.Books;

import java.util.List;

//BookService:底下需要去实现,调用dao层
public interface BookService {
    //增加一个Book
    int addBook(Books book);
    //根据id删除一个Book
    int deleteBookById(int id);
    //更新Book
    int updateBook(Books books);
    //根据id查询,返回一个Book
    Books queryBookById(int id);
    //查询全部Book,返回list集合
    List<Books> queryAllBook();
    //根据书名查询数据
    Books queryBooksByName(String bookName);
}

实现类：

package com.gang.service;

/*
Description:实现类
Author:32259
Time:2020二月2020/2/2716:24
*/

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

import java.util.List;

public class BookServiceImpl implements BookService {


    //调用dao层的操作，设置一个set接口，方便Spring管理
    private BookMapper bookMapper;

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

    public int addBook(Books book) {
        return bookMapper.addBook(book);
    }

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

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

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

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

4、编写MyBatis层

配置MyBatis的核心文件，未来这些都不需要，都可以直接被spring接管，但是毕竟是ssm整合，就留了一点功能在mybatis的配置文件里

4.1、数据库配置文件 database.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456

4.2、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>


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


</configuration>

4.3、编写Dao层Mapper接口对应的Mapper.xml文件

需要导入MyBatis的包。

<mapper namespace="com.gang.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="queryAllBook" resultType="Books">
        SELECT * from ssmbuild.books
    select>

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

5、编写Spring层

配置Spring的一些核心文件，整合MyBatis（dao层），整合service层，我们这里数据源使用c3p0连接池；

5.1、Spring的核心文件applicationContext.xml的编写

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       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
                            http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">


   
    <import resource="classpath:springmvc-servlet.xml"/>


    
    
    <context:property-placeholder location="classpath:database.properties"/>

    
    
    <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}"/>

        
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        
        <property name="autoCommitOnClose" value="false"/>
        
        <property name="checkoutTimeout" value="10000"/>
        
        <property name="acquireRetryAttempts" value="2"/>
    bean>

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

    
    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        
        <property name="basePackage" value="com.gang.dao"/>
    bean>


    
    <context:component-scan base-package="com.gang.service" />

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

    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        
        <property name="dataSource" ref="dataSource" />
    bean>


beans>

6、编写SpringMVC层

配置SpringMVC 、web.xml 、 springmvc-servlet.xml这些配置文件的编写

6.1、web.xml的编写

<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>DispatcherServletservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
            <param-value>classpath:applicationContext.xmlparam-value>
        init-param>
        <load-on-startup>1load-on-startup>
    servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServletservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>

    
    <filter>
        <filter-name>encodingFilterfilter-name>
        <filter-class>
            org.springframework.web.filter.CharacterEncodingFilter
        filter-class>
        <init-param>
            <param-name>encodingparam-name>
            <param-value>utf-8param-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>encodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <session-config>
        <session-timeout>15session-timeout>
    session-config>

web-app>

6.2、springmvc-servlet.xml的编写

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



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

    
    <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>

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

好，到这里，我们的配置文件暂时告一段落！

7、Controller 和 视图层编写

7.1、BookController类的编写

package com.gang.controller;

import com.gang.pojo.Books;
import com.gang.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.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.ArrayList;
import java.util.List;

/*
Description:controller
Author:32259
Time:2020二月2020/2/2716:41
*/
@Controller
@RequestMapping("/book")
public class BookController {

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


    //前端---->接受请求(controller)---->service---->mapper---->操作数据库

    @RequestMapping("/queryBook")
    public String queryBook(String queryBookName,Model model){
        System.out.println("要查询的书籍为："+queryBookName);
        Books books = bookService.queryBooksByName(queryBookName.trim());
        List<Books> list =new ArrayList<Books>();
        list.add(books);
        if (books==null){
            list = bookService.queryAllBook();
            model.addAttribute("error","不好意思，暂时没有，换本书看吧！");
        }

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


    @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.addBook(books);
        return "redirect:/book/allBook";
    }



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

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

    @RequestMapping("/del/{bookId}")
    public String deleteBook(@PathVariable("bookId") int id) {
        bookService.deleteBookById(id);
        return "redirect:/book/allBook";
    }

}

7.2、视图层的jsp页面的编写

• 首页 index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>

<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">点击进入列表页a>
h3>
body>
html>

• 书籍列表页面 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>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    
    <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="${pageContext.request.contextPath}/book/toAddBook">新增a>
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">查看全部书籍a>
        div>
        <div class="col-md-4 column">
            ${error}span>

        div>
        <div class="col-md-4 column">
            <form action="/book/queryBook" method="post" class="form-inline">

                <input type="text" name="queryBookName" class="form-control" placeholder="请输入你要查询的书名" required>
                <input type="submit" value="查询" class="btn btn-success">
            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/toUpdateBook?id=${book.getBookID()}">更改a> |
                            <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除a>
                        td>
                    tr>
                c:forEach>
                tbody>
            table>
        div>
    div>
div>

• 添加书籍页面 addBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>
<head>
    <title>新增书籍title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    
    <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>

• 修改书籍页面 updateBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改信息title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    
    <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.getBookID()}"/>
        书籍名称：<input type="text" name="bookName" value="${book.getBookName()}"/>
        书籍数量：<input type="text" name="bookCounts" value="${book.getBookCounts()}"/>
        书籍详情：<input type="text" name="detail" value="${book.getDetail() }"/>
        <input type="submit" value="提交"/>
    form>

div>

8、配置Tomcat，进行运行！

集成测试，享受胜利的喜悦！

到目前为止，这个SSM项目整合已经完全的OK了，可以直接运行进行测试！

这是我们最终的一个项目框架的样子：

OK，运行Tomcat：

• 首页
  

• 显示所有书籍
  

• 增加书籍
  
  

• 修改书籍
  
  

• 删除书籍，一点就删除了，没得页面

• 按照书名查询书籍
  查询没有的书籍：
  

查询已有的书籍

这就是SSM的整合，其实在真实开发中，resources里面的配置文件没有这么多，都整合在一块了！

hhh这次的分享就到这了，是时候放松一下自己啦~

OK，下篇见~