照着敲的
这各种报错 估计是pom的导包有问题
或者有木有那位老哥有可以运行的源码看看
mybatis-plus
项目结构与源码
User实体类
@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("pw_userid")
public class User {
@TableId(value = "User_id",type= IdType.AUTO)
private Integer User_id;
@TableField(value = "UserName")
private String UserName;
@TableField(value = "Password")
private String Password;
}
mapper接口
//@Repository//代表持久层
@Mapper
public interface Usermapper extends BaseMapper<User> {
//所有的CRUD都操作完成
}
@SpringBootTest
@MapperScan(value = {"com.example.mybatisplus.mapper"})
class MybatisPlusApplicationTests {
@Autowired
private Usermapper usermapper;
@Test
void contextLoads() {
//查询所有用户
List<User> users=usermapper.selectList(null);
// users.forEach(System.out::println);
System.out.println(users);
}
}
主类
@SpringBootApplication
//@ComponentScan(basePackages = "com.example.mybatisplus.mapper")
@MapperScan(value = {"com.example.mybatisplus.mapper"})
public class MybatisPlusApplication {
public static void main(String[] args) {
SpringApplication.run(MybatisPlusApplication.class, args);
}
}
pom.xml
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.7.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
<!-- <relativePath/>-->
</parent>
<groupId>com.example</groupId>
<artifactId>Mybatis-plus</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Mybatis-plus</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>17</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 导入mybatis-plue-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.4.2</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-annotation</artifactId>
<version>3.4.2</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-extension</artifactId>
<version>3.4.2</version>
</dependency>
<!-- <dependency>-->
<!-- <groupId>com.baomidou</groupId>-->
<!-- <artifactId>mybatis-plus-generator</artifactId>-->
<!-- <version>3.4.2</version>-->
<!-- </dependency>-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus</artifactId>
<version>3.4.0</version>
</dependency>
<!--结束mybatis-plue -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.24</version>
<!-- <optional>true</optional>-->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.webjars.npm</groupId>
<artifactId>jquery</artifactId>
<version>3.6.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
<version>2.7.6</version>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-commons</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.3.7.RELEASE</version>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>