SSM(Spring+SpringMVC+MyBatis)框架整合开发流程

阅读原文时间：2023年07月10日阅读：3

回忆了 Spring、SpringMVC、MyBatis 框架整合，完善一个小demo，包括基本的增删改查功能。

开发环境

IDEA
MySQL 5.7
Tomcat 9
Maven 3.2.5
需要熟练掌握MySQL数据库（建表和增删改查语句等，Spring，JavaWeb基础及MyBatis知识，简单的前端知识；

数据库环境

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

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');

开发项目首先搭建基本的环境

新建一Maven项目！SSM ，添加web的支持
导入相关的pom依赖！

http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0

<groupId>jiachuixun</groupId>  
<artifactId>SSM</artifactId>  
<version>1.0-SNAPSHOT</version>

<dependencies>  
    <!--Junit-->  
    <dependency>  
        <groupId>junit</groupId>  
        <artifactId>junit</artifactId>  
        <version>4.12</version>  
    </dependency>  
    <!--数据库驱动-->  
    <dependency>  
        <groupId>mysql</groupId>  
        <artifactId>mysql-connector-java</artifactId>  
        <version>8.0.19</version>  
    </dependency>  
    <!-- 数据库连接池 -->  
    <dependency>  
        <groupId>com.mchange</groupId>  
        <artifactId>c3p0</artifactId>  
        <version>0.9.5.2</version>  
    </dependency>  
    <!--Servlet - JSP -->  
    <dependency>  
        <groupId>javax.servlet</groupId>  
        <artifactId>servlet-api</artifactId>  
        <version>2.5</version>  
    </dependency>  
    <dependency>  
        <groupId>javax.servlet.jsp</groupId>  
        <artifactId>jsp-api</artifactId>  
        <version>2.2</version>  
    </dependency>  
    <dependency>  
        <groupId>javax.servlet</groupId>  
        <artifactId>jstl</artifactId>  
        <version>1.2</version>  
    </dependency>  
    <!--Mybatis-->  
    <dependency>  
        <groupId>org.mybatis</groupId>  
        <artifactId>mybatis</artifactId>  
        <version>3.5.2</version>  
    </dependency>  
    <dependency>  
        <groupId>org.mybatis</groupId>  
        <artifactId>mybatis-spring</artifactId>  
        <version>2.0.2</version>  
    </dependency>  
    <!--Spring-->  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-webmvc</artifactId>  
        <version>5.1.9.RELEASE</version>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-jdbc</artifactId>  
        <version>5.1.9.RELEASE</version>  
    </dependency>  
    <!-- lombok-->  
    <dependency>  
        <groupId>org.projectlombok</groupId>  
        <artifactId>lombok</artifactId>  
        <version>1.18.8</version>  
        <scope>provided</scope>  
    </dependency>  
    <!--AOP 织入器-->  
    <dependency>  
        <groupId>org.aspectj</groupId>  
        <artifactId>aspectjweaver</artifactId>  
        <version>1.9.4</version>  
    </dependency>  
</dependencies>

　　3.Maven资源过滤配置

src/main/java **/*.properties **/*.xml false src/main/resources **/*.properties **/*.xml false

建议基本结构和配置框架

com.jia.controller (控制层)
com.jia.mapper （持久层）
com.jia.service （业务层）
com.jia.pojo (实体类)

mybatis-config

applicationContext.xml

http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

Mybatis层编写配置

1. 数据库配置文件 database.properties

jdbc.driver=com.mysql.cj.jdbc.Driver

如果使用的是MySQL8.0+ ，增加一个时区的配置

jdbc.url=jdbc:mysql://localhost:3306/books?useSSL=true&useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
jdbc.username=root
jdbc.password=123456

2. 编写Mybatis核心配置文件

　　3. 编写数据库对应的实体类com.jia.pojo.Books　　(使用lombok插件)

package com.jia.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;
}

4. 编写mapper层的接口：BooksMapper

package com.jia.mapper;

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

import java.util.List;

public interface BooksMapper {

//添加数据  
int addBooks(Books books);

//删除数据  
int deleteBookById(@Param("bookId") int id);

//更新数据  
int updateBook(Books books);

//查询一条数据  
Books queryBookById(@Param("bookId") int id);

//查询全部数据  
List<Books> queryAllBook();

//查询指定的书籍  
Books queryBooksByName(@Param("bookName") String bookName);

}

5. 编写接口对应的Mapper.xml文件：BooksMapper.xml

<insert id="addBooks" parameterType="Books">  
    insert into Books (bookName, bookCounts, detail)  
    values (#{bookName},#{bookCounts},#{detail});  
</insert>

<delete id="deleteBookById" parameterType="int">  
     delete from Books where bookId = #{bookId};  
</delete>

<update id="updateBook" parameterType="Books">  
    update Books  
    set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}  
    where bookId=#{bookId};  
</update>

<select id="queryBookById" resultType="Books" parameterType="int">  
    select \* from Books where bookId=#{bookId};  
</select>

<select id="queryAllBook" resultType="Books">  
    select \* from Books;  
</select>

<select id="queryBooksByName" resultType="Books" parameterType="String">  
    select \* from books where bookName=#{bookName}  
</select>

6. 变写service层接口和实现类

BooksService接口：

package com.jia.service;

import com.jia.pojo.Books;

import java.util.List;

public interface BooksService {

//添加数据  
int addBooks(Books books);

//删除数据  
int deleteBookById(int id);

//更新数据  
int updateBook(Books books);

//查询一条数据  
Books queryBookById(int id);

//查询全部数据  
List<Books> queryAllBook();

//查询指定的书籍  
Books queryBooksByName(String bookName);

}

BookServiceImpl实现类：

package com.jia.service.impl;

import com.jia.mapper.BooksMapper;
import com.jia.pojo.Books;
import com.jia.service.BooksService;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.List;

public class BooksServiceImpl implements BooksService {

// 业务层 调用 持久层  
@Autowired  
private BooksMapper booksMapper;

// 添加set方法，方便Spring注入IOC容器中  
public void setBooksMapper(BooksMapper booksMapper) {  
    this.booksMapper = booksMapper;  
}

public int addBooks(Books books) {  
    return booksMapper.addBooks(books);  
}

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

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

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

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

public Books queryBooksByName(String bookName) {  
    return booksMapper.queryBooksByName(bookName);  
}

}

Spring的配置

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相关的配置，spring-dao.xml

<!--1.关联数据库配置文件-->  
<context:property-placeholder location="classpath:database.properties"/>

<!--2.数据库连接池:  
                    dbcp  半自动化操作  不能自动连接  
                    c3p0  自动化操作（自动的加载配置文件 并且设置到对象里面）  
                    druid  阿里巴巴出品  
                    hikari SpringBoot默认  
-->  
<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.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MyBaties全局配置文件:mybatis-config.xml -->  
    <property name="configLocation" value="classpath:mybatis-config.xml"/>  
</bean>

<!-- 4.配置扫描mapper接口包，动态实现mapper接口注入到Spring容器中 -->  
<bean id="scannerConfigurer" 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.jia.mapper"/>  
</bean>

3. Spring配置service层

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/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

<bean id="booksService" class="com.jia.service.impl.BooksServiceImpl">  
    <property name="booksMapper" ref="booksMapper"/>  
</bean>

<!-- 扫描service相关的bean -->  
<context:component-scan base-package="com.jia.service"/>

<!-- 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>

<!--aop 事务支持-->  
<tx:advice id="txAdice" transaction-manager="transactionManager">  
    <tx:attributes>  
        <tx:method name="\*" propagation="REQUIRED"/>  
    </tx:attributes>  
</tx:advice>  
<!--配置事务切入-->  
<aop:config>  
    <!--切入点-->  
    <aop:pointcut id="txPointCut" expression="execution(\* com.jia.mapper.\*.\*(..))"/>  
    <aop:advisor advice-ref="txAdice" pointcut-ref="txPointCut"/>  
</aop:config>

SpringMVC层配置

1. 首先项目添加框架支持Web，修改WEB-INF文件下web.xml文件内容

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>

2. 配置编写 spring-mvc.xml 文件

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.过滤静态资源-->  
<mvc:default-servlet-handler/>

<!-- 3.配置jsp 显示ViewResolver视图解析器 -->  
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="resourceViewResolver">  
    <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.jia.controller" />

<!-- 5.json乱码问题-->  
<mvc:annotation-driven>  
    <mvc:message-converters register-defaults="true">  
        <bean class="org.springframework.http.converter.StringHttpMessageConverter">  
            <property name="supportedMediaTypes">  
                <list>  
                    <value>text/html;charset=UTF-8</value>  
                    <value>application/json;charset=UTF-8</value>  
                </list>  
            </property>  
        </bean>  
    </mvc:message-converters>  
</mvc:annotation-driven>

<!-- 6.文件上传-->  
<!-- 定义文件解释器 -->  
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
    <!-- 设置默认编码 -->  
    <property name="defaultEncoding" value="utf-8"/>  
    <!-- 上传图片最大大小5M-->  
    <property name="maxUploadSize" value="10485760"/>  
    <property name="maxInMemorySize" value="40960"/>  
</bean>

3. Spring配置整合文件：applicationContext.xml

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:spring-mvc.xml"/>

以上架构基本配置完成！剩下的就是编写需求实现具体的功能！

Controller 和 View

1. BookController 类编写

package com.jia.controller;

import com.jia.pojo.Books;
import com.jia.service.BooksService;
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;

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

// controller层 调用 service层  
@Autowired  
@Qualifier("booksService")  
private BooksService booksService;

// 查询全部的数据，并且返回到一个数据展示页面  
@RequestMapping("/allBook")  
public String list(Model model){  
    List<Books> books = booksService.queryAllBook();  
    model.addAttribute("list",books);  
    return "allBook";  
}

// 跳转到添加书籍页面  
@RequestMapping("/toAddPaper")  
public String toAddPaper(){  
    return "addBook";  
}

// 添加书籍请求  
@RequestMapping("/addBook")  
public String addBook(Books books){  
    System.out.println("addBook-->"+books);  
    booksService.addBooks(books);  
    return "redirect:/book/allBook";  
}

// 跳转到修改页面  
@RequestMapping("/toUpdate")  
public String toUpdatePaper(int id,Model model){  
    Books books = booksService.queryBookById(id);  
    model.addAttribute("Qbook",books);  
    return "updateBook";  
}

// 修改书籍  
@RequestMapping("/updateBook")  
public String updateBook(Books books){  
    System.out.println("updateBook-->"+books);  
    booksService.updateBook(books);  
    return "redirect:/book/allBook";  
}

// 删除书籍  
@RequestMapping("/deleteBook/{bookId}")  
public String deleteBook(@PathVariable("bookId") int id){  
    booksService.deleteBookById(id);  
    return "redirect:/book/allBook";  
}

// 查询书籍  
@RequestMapping("/queryBook")  
public String queryBook(String bookName,Model model){  
    Books books = booksService.queryBooksByName(bookName);

    List<Books> list = new ArrayList<Books>();  
    list.add(books);

    if (books == null){  
       list = booksService.queryAllBook();  
       model.addAttribute("error","未查到相关内容");  
    }

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

}

2. 编写首页 index.jsp 　　(页面有点简陋，基本的功能都有CRUD)

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

SSM(Spring+SpringMVC+MyBatis)框架整合开发流程

开发环境

数据库环境

开发项目首先搭建基本的环境

建议基本结构和配置框架

Mybatis层编写配置

如果使用的是MySQL8.0+ ，增加一个时区的配置

Spring的配置

SpringMVC层配置

Controller 和 View

登录

书籍列表 —— 显示所有书籍

添加数据

修改数据