手把手教你搭建SSM框架：SpringMVC + Spring + MyBatis

最新推荐文章于 2025-03-10 23:37:04 发布

KKKakarotto

最新推荐文章于 2025-03-10 23:37:04 发布

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本文链接：https://blog.youkuaiyun.com/KKKakarotto/article/details/100523685

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SSM（Spring+SpringMVC+MyBatis）框架集由Spring、SpringMVC、MyBatis三个开源框架整合而成，如果你的项目中,用到了Spring框架,那么其他框架就是和Spring集成和Spring集成的核心思路。本篇面向的只是刚准备入门框架，或者对基本SSM框架配置还不太熟悉的朋友。这次搭建基于idea+tomcat+mysql。想自己搭建一遍的朋友可以跟着下面的步骤一起。

第一步开始

打开idea,maven搭建web项目如图在这里插入图片描述
如图所示,next,输入项目名,域名,next,next,然后等待

如果看到这里BULD SUCCESS 就说明web项目创建成功.

第二部导入相应的依赖jar包

我这里是已经导入需要的jar包了
这里也有官网,可以自己去下载版本

 <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <org.springframework.version>4.3.7.RELEASE</org.springframework.version>
    <com.fasterxml.jackson.version>2.5.0</com.fasterxml.jackson.version>
    <org.slf4j.version>1.7.2</org.slf4j.version>
  </properties>
  <dependencies>
    <!--spring的依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-orm</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${org.springframework.version}</version>
      <scope>test</scope>
    </dependency>

    <!-- 引入web前端的支持 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${org.springframework.version}</version>
    </dependency>

    <!-- SpringMCV上传需要用到io包-->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-io</artifactId>
      <version>1.3.2</version>
    </dependency>
    <!-- 文件上传用到的包 -->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.2.2</version>
    </dependency>
    <!-- SpringMVC的json支持包 -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>${com.fasterxml.jackson.version}</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>${com.fasterxml.jackson.version}</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>${com.fasterxml.jackson.version}</version>
    </dependency>

    <!--mybatis的核心包-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.2.1</version>
    </dependency>
    <!--mybatis集成spring的框架-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.0</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/log4j/log4j -->
    <!--
     日志包
    -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${org.slf4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${org.slf4j.version}</version>
    </dependency>

    <!--数据库-->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.2.2</version>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.6</version>
    </dependency>

    <!--SpringJUnit4ClassRunner requires JUnit 4.12 or higher.-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

第三步:创建项目结构

在这里插入图片描述

第四步:在resources配置相关文件

1.先创建文件dbcp.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
#?useUnicode=true&characterEncoding=utf8
jdbc.url=jdbc:mysql:///ssm
jdbc.username=root
jdbc.password=root

这里的username是你的数据库用户名,password是你的数据库密码,jdbc.url=jdbc:mysql:///ssm,三个杠代表三级,ssm是我的数据库名
2.配置spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- 扫描包-->
    <context:component-scan base-package="cn.itsource.ssm.service"/>

    <!-- 引入连接池-->
    <context:property-placeholder location="classpath:dbcp.properties"/>
    <!--配置连接池-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!-- 持久层:核心配置文件-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--DomainMapper.xml文件-->
        <property name="mapperLocations" value="classpath*:cn/itsource/ssm/mapper/*.xml"/>
        <!-- 别名配置-->
        <property name="typeAliasesPackage">
            <value>
                cn.itsource.ssm.query
                cn.itsource.ssm.domain
            </value>
        </property>
    </bean>

    <!-- Mapper接口映射器配置-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.itsource.ssm.mapper"/>
    </bean>


    <!-- 事务管理-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--
        注解事务:
            transaction-manager="transactionManager"默认是去找transactionManager的bean,如果你写的事务id正好一样,就可以不用写
             transaction-manager了
    -->
    <tx:annotation-driven/>

</beans>

3.配置springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<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/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 http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 扫描包-->
    <context:component-scan base-package="cn.itsource.ssm.controller"/>
    <!-- 开启注解支持-->
    <context:annotation-config/>
    <!-- 静态资源放行-->
    <mvc:default-servlet-handler/>
    <!-- 开启springmvc的注解支持-->
    <mvc:annotation-driven/>

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

    <!-- 如果项目中有文件上传功能，则还需要配置一个文件上传解析器:
     id尽量不要乱写，就是：multipartResolver
     -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--默认编码-->
        <property name="defaultEncoding" value="UTF-8"></property>
        <!--文件上传最大值50MB,50*1024*1024-->
        <property name="maxUploadSize" value="52428800"></property>
    </bean>
    
</beans>

4.配置web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>

  <!-- 加载spring配置文件-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring.xml</param-value>
  </context-param>

  <!--spring监听-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!--DispatcherServlet-->
  <servlet>
    <servlet-name>springmvc-servlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--启动的时候加载springmvc配置文件-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <!--启动的时候加载-->
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>springmvc-servlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
</web-app>

第五步:创建数据库表

CREATE TABLE employee(
	id BIGINT PRIMARY KEY auto_increment,
	name VARCHAR(50) NOT NULL,
	age INT,
	hobby VARCHAR(50) NOT NULL
)

在这里插入图片描述

创建表代码,字段随意,在这里我就随便建3个,随便写点数据

第六步:写业务代码

首先domain层

package cn.itsource.ssm.domain;

public class Employee {

    private Long id;
    private String name;
    private Integer age;
    private String hobby;

    @Override
    public String toString() {
        return "Employee{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", hobby='" + hobby + '\'' +
                '}';
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getHobby() {
        return hobby;
    }

    public void setHobby(String hobby) {
        this.hobby = hobby;
    }
}

mapper层

package cn.itsource.ssm.mapper;

import cn.itsource.ssm.domain.Employee;

import java.util.List;

public interface EmployeeMapper {

    List<Employee> findAll();
}
//这里我就写了一个查询的方法

service层

package cn.itsource.ssm.service;

import cn.itsource.ssm.domain.Employee;

import java.util.List;

public interface IEmployeeService {

    List<Employee> findAll();
}

impl

package cn.itsource.ssm.service.impl;

import cn.itsource.ssm.domain.Employee;
import cn.itsource.ssm.mapper.EmployeeMapper;
import cn.itsource.ssm.service.IEmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @Transactional
 *  写在类上面表示全局配置，当前类中的所有方法都使用这种方式来进行事务管理
 *  写在方法上面表示局部配置，局部配置会覆盖全局配置
 *  readOnly 表示是否只读，默认false【表示读写】
 *  propagation 表示事务传播机制
 *      Propagation.SUPPORTS[推荐]
 *          该方法在某个事务范围内被调用，则方法成为该事务的一部分。如果方法在该事务范围外被调用，该方法就在没有事务的环境下执行。
 *      Propagation.REQUIRED[推荐]
 *          业务方法需要在一个容器里运行。如果方法运行时，已经处在一个事务中，那么加入到这个事务，否则自己新建一个新的事务。
 *      Propagation.REQUIRES_NEW
 *          不管是否存在事务，该方法总会为自己发起一个新的事务。如果方法已经运行在一个事务中，则原有事务挂起，新的事务被创建。
 *      Propagation.NEVER
 *          该方法绝对不能在事务范围内执行。如果在就抛异常。只有该方法没有关联到任何事务，才正常执行。
 */
@Service
@Transactional(propagation = Propagation.SUPPORTS,readOnly = true)//只读
public class EmployeeServiceImpl implements IEmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    @Override
    public List<Employee> findAll() {
        return employeeMapper.findAll();
    }
}

controller

package cn.itsource.ssm.controller;

import cn.itsource.ssm.domain.Employee;
import cn.itsource.ssm.service.IEmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private IEmployeeService employeeService;

    @RequestMapping("/index")
    public String index(){
        return "employee/employee";
    }

    @ResponseBody
    @RequestMapping("/findAll")
    public List<Employee> findAll(){
        return employeeService.findAll();
    }
}

第七步:写sql在EmployeMapper.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">

<!-- namespace:命名空间必须和mapper一致,就是能够超链接过去-->
<mapper namespace="cn.itsource.ssm.mapper.EmployeeMapper">
    <select id="findAll" resultType="Employee">
        select * from employee;
    </select>

</mapper>