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石可破也，而不可夺坚；丹可磨也，而不可夺赤。

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一、创建工程

1.1创建Maven工程

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1.2工程命名

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1.3检查&配置本地Maven路径

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二、SSM整合

2.1导入相关依赖

<dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.10.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.10.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>5.2.10.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.13</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.3</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.32</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.2.16</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.15.0</version>
    </dependency>
  </dependencies>

2.2添加tomcat插件（可选）

<build>
    <plugins>
      <plugin>
        <groupId>org.apache.tomcat.maven</groupId>
        <artifactId>tomcat7-maven-plugin</artifactId>
        <version>2.2</version>
        <configuration>
        <!--设置端口号及访问路径-->
          <port>80</port>
          <path>/</path>
        </configuration>
      </plugin></plugins>
  </build>

2.3添加配置类

• 项目包结构：

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2.3.1添加Spring配置类

• 创建包结构com.practice.config，创建SpringConfig类

package com.practice.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;

/**
 * @Author YJ
 * @Date 2023/8/13 16:50
 * Description:Spring配置类
 */
@Configuration//表明配置类
@ComponentScan({"com.practice.service"})//扫描包路径
@PropertySource("jdbc.properties")//获取资源路径
@Import({JdbcConfig.class,MybatisConfig.class})//spring与mybatis整合
public class SpringConfig {
}

2.3.2添加Jdbc配置类

• 创建jdbc属性文件并添加如下代码表示连接数据库信息

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis
jdbc.username=root
jdbc.password=123456

• 在com.practice.config下创建JdbcConfig配置类

package com.practice.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;

import javax.sql.DataSource;

/**
 * @Author YJ
 * @Date 2023/8/13 16:51
 * Description:Jdbc配置类
 */
public class JdbcConfig {

    /*jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/mybatis
    jdbc.username=root
    jdbc.password=123456*/

	//通过注解，将jdbc属性文件中的属性获取到
    @Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;

    @Bean
    public DataSource dataSource(){
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driver);
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        return dataSource;
    }
}

2.3.3添加Mybatis配置类

package com.practice.config;

import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;

import javax.sql.DataSource;

/**
 * @Author YJ
 * @Date 2023/8/13 16:52
 * Description:Mybatis配置类
 */
public class MybatisConfig {
    @Bean
    public SqlSessionFactoryBean sqlSessionFactoryBean(DataSource dataSource){
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(dataSource);
        factoryBean.setTypeAliasesPackage("com.practice.domain");
        return factoryBean;
    }
    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer(){
        MapperScannerConfigurer msc = new MapperScannerConfigurer();
        msc.setBasePackage("com.practice.dao");
        return msc;
    }
}

2.3.4创建整合类（整合Spring和SpringMVC）

package com.practice.config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

/**
 * @Author YJ
 * @Date 2023/8/13 17:12
 * Description:整合Spring和SpringMVC
 */
public class ServletConfig extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{SpringConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{SpringMVCConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

2.3.5创建SpringMVC配置类

package com.practice.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

/**
 * @Author YJ
 * @Date 2023/8/13 17:13
 * Description:SpringMVC配置类
 */
@Configuration
@ComponentScan("com.practice.controller")
@EnableWebMvc
public class SpringMVCConfig {
}

总结

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