0

pom.xml 文件:

<?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>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.8.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <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>
            <scope>runtime</scope>
        </dependency>

        
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>1.5.8.RELEASE</version>
            </plugin>
        </plugins>
        <defaultGoal>compile</defaultGoal>
    </build>



</project>

UserMapper.java 文件:

package com.my.mapper;

import com.my.entity.UserEntity;
import org.apache.ibatis.annotations.*;  
import org.springframework.stereotype.Component; 
import java.util.List;  
// @Mapper

public interface UserMapper {
    
        @Select("SELECT * FROM users")
        // @Results({
        //     @Result(property = "userSex",  column = "user_sex", javaType = UserSexEnum.class),
        //     @Result(property = "nickName", column = "nick_name")
        // })
        List<UserEntity> getAll();
    
        @Select("SELECT * FROM users WHERE id = #{id}")
        // @Results({
        //     @Result(property = "userSex",  column = "user_sex", javaType = UserSexEnum.class),
        //     @Result(property = "nickName", column = "nick_name")
        // })
        UserEntity getOne(Long id);
    
        @Insert("INSERT INTO users(id,namge,age) VALUES(#{id}, #{name}, #{age})")
        void insert(UserEntity user);
    
        @Update("UPDATE users SET age=#{age},name=#{name} WHERE id =#{id}")
        void update(UserEntity user);
    
        @Delete("DELETE FROM users WHERE id =#{id}")
        void delete(Long id);
    
    }

我在 GitHub 上下载了几个 Spring Boot 使用 Mybatis 的 demo,但运行后都报类似的错误,请问为什么?

补充:
UserMapper.java 文件中:
如果把:import org.apache.ibatis.annotations.*;
改成:
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Insert:
..
就会报import 的错,这是不是意味着import org.apache.ibatis.annotations 这个包存在,但其中并不存在Select和Insert .. 类?这可能吗?

2个回答

0

先执行mvn clean install

0

你看看你的pom,完全没引入mybatis的依赖好吧

撰写答案