Springboot关于mybatis的整合(其实是SSM的整合)

深藏阁楼爱情的钟 2022-03-12 09:56 168阅读 0赞

1.首先在pom.xml中配置必要的依赖包：

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
      </parent>```
      <dependencies>
    
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>
        
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-test</artifactId>
          <scope>test</scope>
        </dependency>
        
        <dependency>
          <groupId>org.mybatis.spring.boot</groupId>
          <artifactId>mybatis-spring-boot-starter</artifactId>
          <version>1.1.1</version>
        </dependency>
        
        <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
        </dependency>
      </dependencies>

2.在application.properties中添加必要的配置

#视图配置
    spring.mvc.view.prefix=/WEB-INF/view/
    spring.mvc.view.suffix=.jsp
    #数据库配置
    spring.datasource.url=jdbc:mysql://localhost:3306/test
    spring.datasource.username=root
    spring.datasource.password=root
    spring.datasource.driver-class-name=com.mysql.jdbc.Driver

3.环境都已经配置完毕，开始从dao层开始开发：  
创建Mapper和Module包：  
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其中我的Mapper.xml文件被注释所替代：  
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注意：采用\#\{\}的方式把@Param注解括号内的参数进行引用

4.dao层做完后开始开发Service层：

public interface UserService {
    
        public void register(String username,String password);
        public User findByUsername(String username);
    }

Impl层：

@Service
    public class UserServiceimpl implements UserService {
        @Autowired
        private UserMapper usermapper;
        @Override
        public void register(String username,String password){
             usermapper.insert(username,password);
        }
        @Override
        public User findByUsername(String username) {
            return usermapper.findByUsername(username);
        }
    }

5.接下来做Controller层：

@RestController
    //@EnableAutoConfiguration //自动配置，相当于写了spring的配置文件
    @RequestMapping("user")
    public class UserController {
    
        @Autowired
        private UserService userService;
    
        @RequestMapping("register")
        @ResponseBody
        public String register(String username,String password){
            userService.register(username,password);
            return "success";
        }
        @RequestMapping("find")
        @ResponseBody
        public User find(String username){
            return userService.findByUsername(username);
        }
    }

6.编写启动类

@EnableAutoConfiguration
    @MapperScan(basePackages = "com.wzu.Mapper")
    @ComponentScan(basePackages = {"com.wzu.Controller","com.wzu.Service"})
    public class App {
    
        public static void main(String[] args) {
            SpringApplication.run(App.class,args);
        }
    }

PS：1.关于过去Spring需要的applicationContext.xml文件现在转\*\*@EnableAutoConfiguration\*\*  
2.关于Mapper包的扫描：  
**@MapperScan(basePackages = “com.wzu.Mapper”)**  
3.关于注释文件  
**@ComponentScan(basePackages = \{“com.wzu.Controller”,“com.wzu.Service”\})**

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