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Springboot整和mybatis方法一

使用xml文件

项目目录结构如下

1pom.xml文件中添加依赖（插件库下载lombok使用@Data注解）

   
       
    
     4.0.0
        
            
     
      org.springframework.boot
             
     
      spring-boot-starter-parent
             
     
      2.3.11.RELEASE
             
      
         
        
    
     com.xxx.proj
        
    
     springboot-mybatis-demo2
        
    
     0.0.1-SNAPSHOT
        
    
     springboot-mybatis-demo2
        
    
     Demo project for Spring Boot
        
            
     
      1.8
         
        
            
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-actuator
              
             
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-jdbc
              
             
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-web
              
             
                 
      
       org.mybatis.spring.boot
                  
      
       mybatis-spring-boot-starter
                  
      
       2.1.4
              
             
                 
      
       org.springframework.boot
                  
      
       spring-boot-devtools
                  
      
       runtime
                  
      
       true
              
             
                 
      
       mysql
                  
      
       mysql-connector-java
                  
      
       runtime
              
             
                 
      
       org.projectlombok
                  
      
       lombok
                  
      
       true
              
             
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-test
                  
      
       test
                  
                      
                           
        
         org.junit.vintage
                            
        
         junit-vintage-engine
                        
                   
              
         
        
            
                 
                      
       
        src/main/java
                       
                           
        
         **/*.xml
                        
                       
       
        false
                   
              
             
                 
                      
       
        org.springframework.boot
                       
       
        spring-boot-maven-plugin
                       
                           
         
          
          
           org.projectlombok
           
          
           lombok
           
          
                        
                   
              
         
    
   

2application.yml文件中添加（格式要对要有空格和缩进）

spring:  datasource:    url: jdbc:mysql:///test?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT%2B8    username: root    password: root    driver-class-name: com.mysql.jdbc.Driver

3Student实体类的创建

package com.xxx.proj.springbootmybatisdemo2.entity;import lombok.Data;@Datapublic class Student {
       private Integer id;    private String name;    private String address;}

4StudentMapper的创建

package com.xxx.proj.springbootmybatisdemo2.mapper;import com.xxx.proj.springbootmybatisdemo2.entity.Student;import java.util.List;public interface StudentMapper {
       List
   
     findAll();}
   

5StudentController类的创建

package com.xxx.proj.springbootmybatisdemo2.controller;import com.xxx.proj.springbootmybatisdemo2.entity.Student;import com.xxx.proj.springbootmybatisdemo2.mapper.StudentMapper;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import java.util.List;@RestControllerpublic class StudentController {
       @Autowired    private StudentMapper studentMapper;    @RequestMapping("/")    public List
   
     findAll() {
           return studentMapper.findAll();    }}
   

6StudentMapper.xml文件的创建

   
       
            select * from student    
   

7启动类添加注解去扫描包然后运行启动类

@SpringBootApplication@MapperScan("com.xxx.proj.springbootmybatisdemo2.mapper")

说明：访问localhost：8080，没有修改项目访问目录所以是8080，lombok插件和依赖必须有不然@Data注解就用不了

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