ssm基本框架搭建springmvc+spring+mybatis_create database ssmbuild; use ssmbuild; drop table-优快云博客

本文链接：https://blog.youkuaiyun.com/dadadaliang/article/details/114681905

对于ssm最基础的框架，本例子中主要是搭建一个图书查询的例子，我们搭建的步骤主要是：首先创建一个books的数据库

CREATE DATABASE ssmbuild;
USE ssmbuild
DROP TABLE if EXISTS books;
CREATE TABLE books (
bookid int(10)PRIMARY key,
bookname VARCHAR(100),
bookcount int(10),
detail VARCHAR(100)
);
INSERT INTO books(bookid,bookname,bookcount,detail)VALUES(1,'Java',10,'从入门到放弃'),(2,'MySql',10,'从删库到跑路'),(3,'Linux',10,'从进门到坐牢')
SELECT * FROM books

一、再接下来就是创建最底层的mybatis层了：
①首先导入相关的依赖：放在pom文件里

<?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>ssmbuild</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.22</version>
        </dependency>
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>


        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</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>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.3</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>5.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.18</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</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>

②把相应的包结构建立好：包括实体类，接口实现类BookMapper，业务类，控制器。
在这里插入图片描述
③编写mybatis-config.xml的配置文件：

<?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
    一般别名和映射源放在mybatis-config里面去做。
    -->
    <typeAliases>
        <package name="com.xkl.Pojo"/>
    </typeAliases>

    <mappers>
        <mapper resource="com/xkl/Dao/BookMapper.xml"/>
    </mappers>

</configuration>

④去完善包的内容：
首先写实体类Books：

package com.xkl.Pojo;

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

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
    private int bookid;
    private String bookname;
    private int bookcount;
    private String detail;
}

再写映射文件接口实现BookMapper：

package com.xkl.Dao;

import com.xkl.Pojo.Books;

import java.util.List;

public interface BookMapper {
    int addBook(Books books);
    int deleteBookById(int bookid);
    int updateBook(Books books);
    Books queryBookById(int bookid);
    List<Books>queryAllBooks();
}

接下来写BookMapper.xml文件：

<?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.xkl.Dao.BookMapper">
    <insert id="addBook" parameterType="com.xkl.Pojo.Books">
        insert into ssmbuild.books (bookid,bookname,bookcount,detail)
        values (#{bookid},#{bookname},#{bookcount},#{detail},)
    </insert>
    <delete id="deleteBookById" parameterType="int">
        delete from ssmbuild.books
        where bookid = #{bookid}
    </delete>
    <update id="updateBook" parameterType="com.xkl.Pojo.Books">
        update ssmbuild.books
        set bookname = #{bookname},bookcount=#{bookcount},detail = #{detail}
        where bookid = #{bookid}
    </update>
    <select id="queryBookById" resultType="com.xkl.Pojo.Books">
        select * from ssmbuild.books
        where bookid = #{bookid}
    </select>
    <select id="queryAllBooks" resultType="com.xkl.Pojo.Books">
        select * from ssmbuild.books
    </select>
</mapper>

实现了底层后，再写业务层（说白了就是此前的代理模式）,对于业务层的功能就是调用底层mapper。
业务层接口BookService:

package com.xkl.Service;

import com.xkl.Pojo.Books;

import java.util.List;

public interface BookService {
    int addBook(Books books);
    int deleteBookById(int bookid);
    int updateBook(Books books);
    Books queryBookById(int bookid);
    List<Books> queryAllBooks();

}

相应接口完成后，需要完善接口实现类:BookServiceImpl:

package com.xkl.Service;

import com.xkl.Dao.BookMapper;
import com.xkl.Pojo.Books;

import java.util.List;

public class BookServiceImpl implements BookService{

    /*业务层调Dao层，组合dao*/
    private BookMapper bookMapper;
    public void setBookMapper(BookMapper bookMapper){
        this.bookMapper = bookMapper;
    }
    public int addBook(Books books) {
        return bookMapper.addBook(books);
    }

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

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

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

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

以上最底层的架构已经建好，接下来就要整合spring和mybatis了。
⑤整合将dao注入到spring容器中去：spring-dao.xml
因为这里使用的是配置文件连接数据库的，所以需要提前设置好数据库配置文件：

jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
jdbc.user=root
jdbc.pwd=自己的数据库连接密码

<?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-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driverClass}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.pwd}"/>

        <!-- 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配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>


    <!--4、配置dao接口扫描包，动态的实现了Dao接口可以注入到Spring容器中！注意这个原先在spring中是需要一个实现类来进行的：UserMapperImpl-->
    <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.xkl.Dao"/>
    </bean>

</beans>

⑥将Service注入到spring: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"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        https://www.springframework.org/schema/tx/spring-tx.xsd">

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

    <!--2、将我们的所有业务类，注入到Spring，可以通过配置，或者注解实现-->
    <bean id="BookServiceImpl" class="com.xkl.Service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--3、声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--&lt;!&ndash;4、aop事务支持&ndash;&gt;
    <tx:advice id="txadvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="save*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="query*" propagation="REQUIRED"/>
            <tx:method name="remove*" propagation="REQUIRED"/>

        </tx:attributes>
    </tx:advice>

    &lt;!&ndash;<aop:config>
        <aop:pointcut id="pointcut" expression="execution(*
         com.xkl.Service.*.*(..))"/>
        <aop:advisor advice-ref="advice" pointcut-ref="pointcut"/>
    </aop:config>&ndash;&gt;

    <aop:config>
        <aop:pointcut id="txPointCut" expression="execution(* com.xkl.Service.*.*(..))"/>&lt;!&ndash;切入点的设置&ndash;&gt;
        <aop:advisor advice-ref="txadvice" pointcut-ref="txPointCut"/>&lt;!&ndash;想要切入的方法&ndash;&gt;
    </aop:config>
-->

</beans>

现在spring和mybatis层整合完毕了。接下来就是整合springmvc了。
⑦整合springmvc首先配置web.xml文件（也就是需要一个中心控制器DispatchServlet）:
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">
    <servlet>
        <servlet-name>springmvc</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>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--乱码过滤-->
    <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>/ *(这里是没有空格的无语的编辑器)</url-pattern>
    </filter-mapping>
    <!--Session:设置一个Session过期时间-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

在接下来写web.xml需要关联的一个配置文件：
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: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
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--1、注解驱动-->
    <mvc:annotation-driven/>
    <!--2、静态资源-->
    <mvc:default-servlet-handler/>
    <!--3、扫描包:controller-->
    <context:component-scan base-package="com.xkl.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>

到此为止所有的框架均已整合完毕。现在将他们全部整合到最终的applicationContext.xml文件中去。

<?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/cache"
       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
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

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


</beans>

再就是根据前端提交请求数据经过springmvc的url处理器和适配器，会跳转到控制器里面进行处理。
BookController:

package com.xkl.Controller;

import com.xkl.Pojo.Books;
import com.xkl.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.List;

@Controller
@RequestMapping("/book")
public class BookController {
    //controller层调service
    @Autowired
    @Qualifier("BookServiceImpl")
    private BookService bookService;

    //查询全部书籍，并且返回到一个书籍展示页面
    @RequestMapping("/allBook")/*这个是地址栏输入的*/
    public String list(Model model){
        List<Books>list = bookService.queryAllBooks();
        model.addAttribute("list",list);
        return "allBook";/*跳转到的页面*/
    }

}

根据springmvc.xml里面的视图解析器进行跳转页面的设置。
在这里插入图片描述
在WEB-INF文件夹下创建jsp文件夹，在jsp文件夹下写allBook.jsp文件。
allBook.jsp:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
  Created by IntelliJ IDEA.
  User: xxxxxxkl
  Date: 2021/3/10
  Time: 15:39
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>书籍展示</title>
    <%--BootStrap美化页面--%>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">




</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="co-md-12 column"><%--把屏幕等分成12份，m代表中等大小，12份是占满，如果是4的话，就是占据1/3--%>
            <div class="page-header">
                <h1>
                    <smile>书籍列表 ------ 显示所有数据</smile>
                </h1>
            </div>
        </div>

    </div>
    <div class="row clearfix"><%--清除浮动--%>
        <div class="col-md-12 column">
            <table class="table table-hover table-striped">
                <thead>
                    <tr>
                        <th>书籍编号</th>
                        <th>书籍名称</th>
                        <th>书籍数量</th>
                        <th>书籍详情</th>
                    </tr>
                </thead>


                <%--书籍从数据库里面查询出来，从这个list中遍历出来：foreach--%>
                    <c:forEach var="book" items="${list}">
                        <tr>
                            <td>${book.bookid}</td>
                            <td>${book.bookname}</td>
                            <td>${book.bookcount}</td>
                            <td>${book.detail}</td>
                        </tr>
                    </c:forEach>

                <tbody>

                </tbody>

            </table>
        </div>

    </div>
</div>


</body>
</html>

如有必要的话对首页进行美化：

<%--
  Created by IntelliJ IDEA.
  User: xxxxxxkl
  Date: 2021/3/6
  Time: 16:43
  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>
      a{
        text-decoration:none;/*把原本内容下的一根线去了*/
        color: antiquewhite;
        font-size: 18px;
      }

      /*h3是标签选择器，可以改页面中所有关于标签的样式*/
      h3{
        width: 180px;
        height: 38px;
        margin: 100px auto;/*auto的话就可能居中*/
        text-align: center;
        line-height: 38px;
        background: cornsilk;
        border-radius: 5px;/*设置圆角边框*/
      }
    </style>
  </head>
  <body>
  <h3>
    <a href="${pageContext.request.contextPath}/book/allBook">进入书籍页面</a>
  </h3>
  </body>
</html>

最后由一点建议是：此项例子的功能是将后端的数据提取展现给前端页面。所以我们在进行前后端运行之前先测试一下是否能将数据库的数据提取出来。
写个测试文件mytest：

import com.xkl.Pojo.Books;
import com.xkl.Service.BookService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Mytest {
    /*客户层调用业务层*/
    @Test
    public void test(){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        BookService bookServiceImpl = (BookService) context.getBean("BookServiceImpl");
        for(Books books:bookServiceImpl.queryAllBooks()){
            System.out.println(books);
        }
    }
}