使用Maven搭建Springboot版ssm框架

旧城等待， 2022-05-11 13:10 191阅读 0赞

开发环境  
IDE:Idea-2017.1.4  
Maven:3.0.4  
Spring-Boot:1.5.3.RELEASE  
mysql:5.5.49  
开发步骤:  
一、搭建Maven版本SpringBoot工程  
1 .搭建普通Maven工程  
2 .导入SpringBoot依赖  
3 .书写SpringBoot运行主类  
4 .配置application.properties文件  
5 .测试SpringBoot是否搭建成功  
二、搭建SSM工程  
1 .建立UserBean类  
2 .建立mapper.xml文件  
3 .建立mapper，service，controller类  
4 .配置application.properties文件  
5 .启动工程测试

直接上截图:  
一、搭建Maven版本SpringBoot工程  
1 .使用Idea搭建普通Maven工程  
![新建Maven工程][Maven]  
使用模板创建Maven工程  
![使用模板创建Maven工程][Maven 1]  
填写项目在全球的唯一标识和项目名称  
![填写项目在全球的唯一标识和项目名称][70]  
填写Maven的配置(请保证填写的Maven配置可以正常连接到Maven仓库)  
![填写Maven配置][Maven 2]  
直接点击finish完成即可  
![Maven工程建立完成][Maven 3]

2 .导入SpringBoot依赖  
引入依赖前，将maven生成的一些插件和依赖删除，只保留如下配置:

<?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>cn.org.test</groupId>
      <artifactId>spring-bootTest</artifactId>
      <version>1.0-SNAPSHOT</version>
      <packaging>jar</packaging>
    
      <name>spring-bootTest Maven Webapp</name>
      
      <url>http://www.example.com</url>
    
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
      </properties>
    
      <dependencies>
      </dependencies>
    
      <build>
       
        <finalName>spring-bootTest</finalName>
            <resources>
                <resource>
                    <directory>src/main/resources</directory>
                    <filtering>true</filtering>
                </resource>
            </resources>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <mainClass>cn.org.test.SpringBootUserApplication</mainClass>
                    </configuration>
                </plugin>
            </plugins>
      </build>
    </project>

在pom.xml文件中加入以下依赖

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.3.RELEASE</version>
      </parent>
    
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

3 .建立包路径cn.org.test。并在test包下书写SpringBoot运行主类

@SpringBootApplication
    public class SpringBootUserApplication {
        /**
         * spring boot的入口
         * @param args
         */
        public static void main(String[] args) {
            SpringApplication.run(SpringBootUserApplication.class,args);
        }
    }

@SpringBootApplication注解的作用(个人理解):  
(1).扫描当前包及当前包子包下被@Controller、@service、@Resposity注解的类，并将其加入到Spring容器管理  
(2).程序启动时，加载SpringBoot默认的配置  
进行到这一步，项目结构为:  
![项目结构][70 1]  
4 .测试SpringBoot是否搭建成功  
运行主类中的main方法，启动SpringBoot工程。看到下图所示提示信息，代表启动成功  
![SpringBoot基础代码环境搭建成功][SpringBoot]  
二、搭建SSM工程  
1 .添加mybatis和mysql驱动依赖

<dependency>
          <groupId>org.mybatis.spring.boot</groupId>
          <artifactId>mybatis-spring-boot-starter</artifactId>
          <version>1.3.1</version>
        </dependency>
        
        <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.23</version>
        </dependency>

2 .在test包下建立domain包并在其下建立UserBean类，随便写几个属性

public class User implements Serializable {
        private String userId;
        private String userName;
        private int age;
        private String address;
    
        public String getUserId() {
            return userId;
        }
    
        public void setUserId(String userId) {
            this.userId = userId;
        }
    
        public String getUserName() {
            return userName;
        }
    
        public void setUserName(String userName) {
            this.userName = userName;
        }
    
        public int getAge() {
            return age;
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    
        public String getAddress() {
            return address;
        }
    
        public void setAddress(String address) {
            this.address = address;
        }
    
        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
    
            User user = (User) o;
    
            if (age != user.age) return false;
            if (userId != null ? !userId.equals(user.userId) : user.userId != null) return false;
            if (userName != null ? !userName.equals(user.userName) : user.userName != null) return false;
            return address != null ? address.equals(user.address) : user.address == null;
        }
    
        @Override
        public int hashCode() {
            int result = userId != null ? userId.hashCode() : 0;
            result = 31 * result + (userName != null ? userName.hashCode() : 0);
            result = 31 * result + age;
            result = 31 * result + (address != null ? address.hashCode() : 0);
            return result;
        }
    }

3 .建立mapper.xml文件  
新建resources文件夹，并在其下建立mapper包，在mapper下建立mapper.xml文件，结构如下:  
![mapper文件所在目录][mapper]  
mapper.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="cn.org.test.mapper.UserMapper">
        <resultMap id="getUser" type="User">
            <result column="user_id" property="userId" jdbcType="VARCHAR" />
            <result column="user_name" property="userName" jdbcType="VARCHAR" />
            <result column="age" property="age" jdbcType="INTEGER" />
            <result column="address" property="address" jdbcType="VARCHAR" />
        </resultMap>
        <select id="getUser" resultMap="getUser">
            SELECT * from USER
        </select>
    </mapper>

4 .分别在test包下建立mapper包，service包，controller包，并分别在其下建立mapper接口，service接口，controller类  
(1) UserMapper.java

public interface UserMapper {
        public User getUser();
    }

(2) 建立service接口

public interface UserService {
        public User getUser();
    }

在service包下建立impl包，并在impl包下建立UserServiceImpl.java。实现UserService接口

@Service
    public class UserServiceImpl implements UserService {
        @Autowired
        public UserMapper userMapper;
    
        @Override
        public User getUser() {
            User user = userMapper.getUser();
            return user;
        }
    }

(3) UserController.java

@Controller
    @RequestMapping("/user")
    public class UserController {
        @Autowired
        public UserService userService;
        @RequestMapping("/getUser")
        @ResponseBody
        public User getUser(String userId) {
            System.out.println("获取到用户的唯一标识:"+userId);
            User user = userService.getUser();
            return user;
        }
    }

***注意:我们自己写的类所在包层级要低于主类所在包的层级，否则Springboot主类无法扫描我们写的类。启动工程后，进行访问。会报出如下错误:***  
![错误截图][70 2]  
我工程中的层级结构截图如下:  
![主类以及自写类层级结构划分截图][70 3]  
5 .在resources文件夹下新建application.properties文件，并添加如下配置:

#数据库连接配置
    spring.datasource.driver-class-name=com.mysql.jdbc.Driver
    spring.datasource.url=jdbc:mysql://127.0.0.1:3306/user?characterEncoding=UTF-8
    spring.datasource.username=root
    spring.datasource.password=1234
    #mybatis扫描mapper文件
    mybatis.mapper-locations=classpath:/mapper/*.xml
    #mybatis将bean设置别名
    mybatis.type-aliases-package=cn.org.test.domain

6 .在SpringBoot运行主类上添加@MapperScan注解，扫描Mapper接口。

@SpringBootApplication
    @MapperScan(basePackages = {"cn.org.test.,mapper")
    public class SpringBootUserApplication {
        public static void main(String[] args) {
            SpringApplication.run(SpringBootUserApplication.class,args);
        }
    }

7 .建立数据库表  
![数据库表][70 4]  
8 .启动工程测试  
![成功获取到数据][70 5]

[Maven]: /images/20220505/87944818f93d4aba83fd7353ce279d96.png
[Maven 1]: /images/20220505/026110ecec7a44cbae4aae206a342edb.png
[70]: /images/20220505/6d5c32e753ba4c77a28c815ff2f2f0cb.png
[Maven 2]: /images/20220505/4c99f4d6f49346daace3cee418859e3e.png
[Maven 3]: /images/20220505/657ef9ce4681453a93e04a873343a27a.png
[70 1]: /images/20220505/10e73c3141fd4b708b38e737429802df.png
[SpringBoot]: /images/20220505/e0b2f86c57b940faa70ac3b049172474.png
[mapper]: /images/20220505/aa8801ef98d041338e22b807b91f23db.png
[70 2]: /images/20220505/0e901a0f9f004772a170b3acda9440ba.png
[70 3]: /images/20220505/db1dc4789fb34843aa593fb489651394.png
[70 4]: /images/20220505/eb4056cdd4df47b7a35e33db871db48d.png
[70 5]: /images/20220505/25350dc80e4743e1ba79aa22ee680fb2.png