SSM整合（狂神版-整理自用）

我的项目环境

• IDEA 2022
• Mysql 8.0.29
• Tomcat 9
• Maven 3.8.6

创建数据库表(在ssmbuid数据库里）

CREATE TABLE books (
  bookID int NOT NULL AUTO_INCREMENT,
  bookName varchar(100) NOT NULL,
  bookCounts int NOT NULL,
  details varchar(200) NOT NULL,
  PRIMARY KEY (bookID)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb3;

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');

项目环境搭建

1.创建普通Maven项目ssmBuild-test

 2.在项目的pom.xml文件里面导入相关依赖和设置静态资源过滤（确保所有配置文件能够成功导出）

 <!--导入依赖-->
    <dependencies>
        <!--Junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
        <!--mysql数据库依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.29</version>
        </dependency>
        <!--c3p0连接池-->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <!--servlet依赖-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <!--jsp依赖-->
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
        </dependency>
        <!--mybatis框架依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.11</version>
        </dependency>
        <!--spring-mybatis整合框架-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.7</version>
        </dependency>
        <!--JSTL-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!--spring框架依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.23</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.23</version>
        </dependency>
    </dependencies>

 注意：这里还有一个重要的操作，不然可能会出现404错误:

 静态资源过滤：

<!--静态资源过滤-->
<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>

建立基本结构

Mybatis层编写 

1.数据库配置文件databases.properties

jdbc.driver = com.mysql.cj.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=UTF-8
jdbc.username = root
jdbc.password = root

 2.IDEA关联数据库

 

 3.编写Mybatis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>
<!--配置别名-->
    <typeAliases>
        <package name="com.pojo"/>
    </typeAliases>
<!--注册mapper:每一个Mapper.xml都需要在Mybatis核心配置文件中注册-->
    <mappers>
        <mapper resource="com/dao/BookMapper.xml"/>
    </mappers>

</configuration>

4.编写数据库对应的实体类com.pojo.Books,可以使用lombok插件

package com.pojo;

public class Books {
    public int bookID;
    public String bookName;
    public int bookCounts;
    public String details;

    public Books(int bookID, String bookName, int bookCounts, String details) {
        this.bookID = bookID;
        this.bookName = bookName;
        this.bookCounts = bookCounts;
        this.details = details;
    }

    public Books() {
    }

    public int getBookID() {
        return bookID;
    }

    public void setBookID(int bookID) {
        this.bookID = bookID;
    }

    public String getBookName() {
        return bookName;
    }

    public void setBookName(String bookName) {
        this.bookName = bookName;
    }

    public int getBookCounts() {
        return bookCounts;
    }

    public void setBookCounts(int bookCounts) {
        this.bookCounts = bookCounts;
    }

    public String getDetails() {
        return details;
    }

    public void setDetails(String details) {
        this.details = details;
    }

    @Override
    public String toString() {
        return "Books{" +
                "bookID=" + bookID +
                ", bookName='" + bookName + '\'' +
                ", bookCounts=" + bookCounts +
                ", details='" + details + '\'' +
                '}';
    }
}

5.编写Dao层的Mapper接口（BookMapper）

package com.dao;

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

import java.util.List;

/**
 * 增删改查
 */
public interface BookMapper {
    //增加一本书
     int addBook(Books book);
    //删除一本书
    int deleteBook(@Param("bookID") int ID);
    //修改一本书
    int updateBook(Books book);
    //查询一本书
    Books queryBookItem(@Param("bookID") int ID);
    //查询全部书籍
    List<Books> queryAllBooks();


}

6.编写接口对应的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.dao.BookMapper">

<insert id="addBook" parameterType="Books">
    insert into ssmbuild.books(bookID,bookName,bookCounts,details)
    values(#{bookID},#{bookName},#{bookCounts},#{details})
</insert>

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

    <update id="updateBook" parameterType="Books">
        update ssmbuild.books
        set bookName = #{bookName},bookCounts = #{bookCounts},details = #{details}
        where bookID = #{bookID}
    </update>

    <select id="queryBookItem" resultType="Books">
        select * from ssmbuild.books where bookID = #{bookID}
    </select>

    <select id="queryAllBooks" resultType="Books">
        select * from ssmbuild.books;
    </select>

</mapper>

 7.编写Service层的接口（BookService）和实现类（BookServiceImpl）

package com.service;

import com.pojo.Books;

import java.util.List;

public interface BookService {
    //增加一本书
    int addBook(Books book);
    //删除一本书
    int deleteBook(int ID);
    //修改一本书
    int updateBook(Books book);
    //查询一本书
    Books queryBookItem(int ID);
    //查询全部书籍
    List<Books> queryAllBooks();

}

package com.service;

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

import java.util.List;

public class BookServiceImpl implements BookService {
    /*组合,service层调用dao层*/
    public BookMapper bookMapper;

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

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

    @Override
    public int deleteBook(int ID) {
        return bookMapper.deleteBook(ID);
    }

    @Override
    public int updateBook(Books book) {
        return bookMapper.updateBook(book);
    }

    @Override
    public Books queryBookItem(int ID) {
        return bookMapper.queryBookItem(ID);
    }

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

编写Spring层

1.配置Spring整合Mybatis，这里的数据源使用c3p0连接池——编写相关配置文件: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">
        <!--关联数据库文件-->
        <context:property-placeholder location="classpath:databases.properties"/>
        <!--数据库连接池-->
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
                <!--配置连接池属性-->
                <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，单位是毫秒-->
                <property name="checkoutTimeout" value="10000"/>
                <!--当获取连接失败的重试次数-->
                <property name="acquireRetryAttempts" value="2"/>
        </bean>
        <!--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mybatis全局配置文件:mybatis-config.xml-->
                <property name="configLocation" value="classpath:mybatis-config.xml"/>
        </bean>
        <!--配置扫描Dao接口包，动态实现Dao接口注入到spring容器中-->
        <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.dao"/>
        </bean>

        </beans>

2.Spring整合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"
       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">
    <!--扫描service相关的bean-->
    <context:component-scan base-package="com.service"/>
    <!--BookServiceImpl注入到IOC容器中-->
    <bean id="BookServiceImpl" class="com.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>

SpringMVC层

1.配置web.xml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">
    <!--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.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.controller" />

</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
        https://www.springframework.org/schema/beans/spring-beans.xsd">
    <import resource="spring-dao.xml"/>
    <import resource="spring-service.xml"/>
    <import resource="spring-mvc.xml"/>

</beans>

Controller和视图层编写

1.Controller层编写（com.controller.BookController）

package com.controller;

import com.pojo.Books;
import com.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.List;

@Controller
@RequestMapping("/book")
public class BookController {
    @Autowired
    @Qualifier("BookServiceImpl")
  private BookService bookService;
//查询全部书籍
    @RequestMapping("/allBook")
    public String list(Model model)
    {
        List<Books> books = bookService.queryAllBooks();
        model.addAttribute("list",books);
        return "allBook";
    }
//跳转到更新书籍页面
    @RequestMapping("/toUpdateBook")
    public String update(Model model,int id)
    {
        Books book = bookService.queryBookItem(id);
        model.addAttribute("book",book);
        return "toUpdateBook";
    }
//保存更新书籍
    @RequestMapping("/saveBook")
    public String saveBook(Model model,Books book)
    {
        int code  = bookService.updateBook(book);
        List<Books> books = bookService.queryAllBooks();
        model.addAttribute("list",books);
        return "redirect:allBook";
    }
//删除书籍
    @RequestMapping("/del/{bookID}")
    public String deleteBook(Model model,@PathVariable("bookID") int id)
    {
        int code = bookService.deleteBook(id);
        return "redirect:/book/allBook";
    }
//跳转到增加书籍页面
    @RequestMapping("/toAddBook")
    public String addBook()
    {
        return "addBook";
    }
//保存新增书籍
    @RequestMapping("/saveItem")
    public String saveNewBook(Model model,Books book)
    {
        int code = bookService.addBook(book);
        return "redirect:/book/allBook";
    }

}

2.编写index.jsp

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

3.编写书籍列表页面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">
    <!-- 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>${book.getDetails()}</td>
                        <td>
                            <a href="${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>

4.新增书籍页面addBook.jsp

<%--
  Created by IntelliJ IDEA.
  User: leishen
  Date: 2023/1/5
  Time: 13:01
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>增加书籍</title>
</head>
<body>
<h1>新增书籍</h1>
<form action="${pageContext.request.contextPath}/book/saveItem" method="post">
    书籍名称:<input type="text" name="bookName"><br>
    书籍数量:<input type="text" name="bookCounts"><br>
    书籍详情:<input type="text" name="details"><br>
    <input type="submit" value="保存新增">
</form>
</body>
</html>

5.修改书籍页面toUpdateBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改页面</title>
</head>
<body>
<h1>修改书籍信息</h1>
<form action="${pageContext.request.contextPath}/book/saveBook" method="post">
    书籍编号:<input type="text" value="${book.bookID}" readonly name="bookID"><br>
    书籍名称:<input type="text" value="${book.bookName}" name="bookName"><br>
    书籍数量:<input type="text" value="${book.bookCounts}" name="bookCounts"><br>
    书籍详情:<input type="text" value="${book.details}" name="details"><br>
    <input type="submit" value="保存修改">
</form>
</body>
</html>