No qualifying bean of type com.example.service.testService available

package com.example.expriment;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

@Configuration
@ComponentScan(basePackages = "com.example.dao")
@PropertySource(value = {"classpath:jdbc.properties"},ignoreResourceNotFound = true)

/**
 * @author join
 * @date 2022/12/6 - 12:30
 */
public class SpringJDBCConfig {
    @Value("${jdbc.url}")
    private String jdbcUrl;
    @Value("${jdbc.driverClassName}")
    private String jdbcDriverClassName;
    @Value("${jdbc.username}")
    private String jdbcUserName;
    @Value("${jdbc.password}")
    private String jdbcPassword;
    /**
     *配置数据源
     */
    @Bean
    public DriverManagerDataSource dataSource(){
        DriverManagerDataSource myDataSourse = new DriverManagerDataSource();
        //数据库驱动
        myDataSourse.setDriverClassName(jdbcDriverClassName);;
        //相应驱动的jdbcUrl
        myDataSourse.setUrl(jdbcUrl);
        //数据库的用户名
        myDataSourse.setUsername(jdbcUserName);
        //数据库的密码
        myDataSourse.setPassword(jdbcPassword);
        return myDataSourse;
    }
    /**
     *配置JDbcTemplate
     */
    @Bean(value = "jdbcTemplate")
    public JdbcTemplate getJdbcTemplate(){
        return new JdbcTemplate(dataSource());
    }

}
dao层
package com.example.dao;
import java.util.List;
import com.example.entity.MyUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository;

/**
 * @author join
 * @date 2022/12/8 - 15:37
 */

@Repository
public class testDaoImpl implements testDao {
    @Autowired
    //使用配置类中的JDBC模板
    private JdbcTemplate jdbcTemplate;
    /**
     * 更新方法，包括添加、修改、删除
     */
    public int update(String sql,Object[] param){
        return jdbcTemplate.update(sql,param);
    }
    /**
     * 查询方法
     */
    public List<MyUser> query(String sql,Object[] param){
        RowMapper<MyUser> rowMapper = new BeanPropertyRowMapper<MyUser>(MyUser.class);
        return jdbcTemplate.query(sql,rowMapper);
    }
}

server层

package com.example.service;
import java.util.List;
import com.example.dao.testDao;
import com.example.entity.MyUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
 * @author join
 * @date 2022/12/8 - 16:09
 */
@Service
public class testServiceImpl implements testService{
    @Autowired
    public testDao testdao;
    @Override
    public void testJDBC(){
        String inserSql ="insert into user(主键,姓名,年龄,性别) values(?，?,?,?)";
        //数组param的值与insertSql语句中的？一 一对应
        Object[] param1 = {"1","一","19","男"};
        Object[] param2 = {"2","二","19","男"};
        Object[] param3 = {"3","三","19","男"};
        Object[] param4 = {"4","四","19","男"};
        Object[] param5 = {"5","五","19","男"};
        Object[] param6 = {"6","六","19","男"};
        Object[] param7 = {"7","七","19","男"};
        Object[] param8 = {"8","八","19","男"};
        Object[] param9 = {"9","九","19","男"};
        Object[] param10 = {"10","十","19","男"};
        //添加用户
        testdao.update(inserSql,param1);
        testdao.update(inserSql,param2);
        testdao.update(inserSql,param3);
        testdao.update(inserSql,param4);
        testdao.update(inserSql,param5);
        testdao.update(inserSql,param6);
        testdao.update(inserSql,param7);
        testdao.update(inserSql,param8);
        testdao.update(inserSql,param9);
        testdao.update(inserSql,param10);
        //查询用户
        String selectSql = "select * from user";
        List<MyUser> list = testdao.query(selectSql,null);
        for (MyUser mu:list){
            System.out.println(mu);
        }
    }
}

启动类
package com.example.expriment;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import com.example.service.testService;
import org.springframework.context.annotation.ComponentScan;

/**
 * @author join
 * @date 2022/12/8 - 16:26
 */
@ComponentScan(basePackages = {"com.example.service.testService"})
public class testJDBC {
    public static void main(String[] args) {
        //初始化Spring容器ApplicationcationContext
        AnnotationConfigApplicationContext appcon =
                new AnnotationConfigApplicationContext(SpringJDBCConfig.class);
        testService ts = appcon.getBean(testService.class);
        ts.testJDBC();
        appcon.close();
    }
}


![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/023358286076178.png "#left")

总是会报扫不到包，但是注释啥的都有；问了别人说是不知道啥要写到配置类中去，求解啊！

你这个自动扫描，加在main方法这个类上，框架 很明显 不能 自动 识别的吧， 你要用 SpringBootTest 或 SpringTest的方式，进行单元测试

可以像这样测试：

如果硬要 用 main方法跑，AnnotationConfigApplicationContext 要用 这个 scan(String)进行类路径扫描

如有帮助，欢迎点赞+采纳哈！

测试类上的包扫描写到 com.example.service 这里就行了

尝试使用 springboot的单元测试跑一下