@SpringBootApplicationpublic class BetaWebApplication {
    public static void main(String[] args) {        SpringApplication.run(BetaWebApplication.class, args);    }}

@RestController@RequestMapping("demo")public class DemoController {
    @GetMapping("test")    public String test() {        return "Hello World!";    }}

<dependencyManagement>    <dependencies>        <dependency>            <groupId>com.yibao.betagroupId>            <artifactId>beta-bizartifactId>            <version>${beta.version}version>        dependency>        <dependency>            <groupId>com.yibao.betagroupId>            <artifactId>beta-daoartifactId>            <version>${beta.version}version>        dependency>        <dependency>            <groupId>com.yibao.betagroupId>            <artifactId>beta-webartifactId>            <version>${beta.version}version>        dependency>    dependencies>dependencyManagement>

<dependencies>    <dependency>        <groupId>com.yibao.betagroupId>        <artifactId>beta-bizartifactId>    dependency>dependencies>

<dependencies>    <dependency>        <groupId>com.yibao.betagroupId>        <artifactId>beta-daoartifactId>    dependency>dependencies>

public?interface?DemoService?{    String test();}

@Servicepublic class DemoServiceImpl implements DemoService {
    @Override    public String test() {        return "test";    }}

package com.yibao.beta.web.controller;@RestController@RequestMapping("demo")public class DemoController {
    @Autowired    private DemoService demoService;
    @GetMapping("test")    public String test() {        return demoService.test();    }}

***************************APPLICATION FAILED TO START***************************
Description:Field demoService in com.yibao.beta.web.controller.DemoController required a bean of type 'com.yibao.beta.biz.service.DemoService' that could not be found.
Action:Consider?defining?a?bean?of?type?'com.yibao.beta.biz.service.DemoService'?in?your?configuration.

package com.yibao.beta.web;
@SpringBootApplication(scanBasePackages = "com.yibao.beta")@MapperScan("com.yibao.beta.dao.mapper")public class BetaWebApplication {
    public static void main(String[] args) {        SpringApplication.run(BetaWebApplication.class, args);    }}

dependencyManagement>    <dependencies>        <dependency>            <groupId>org.mybatis.spring.bootgroupId>            <artifactId>mybatis-spring-boot-starterartifactId>            <version>1.3.2version>        dependency>        <dependency>            <groupId>org.projectlombokgroupId>            <artifactId>lombokartifactId>            <version>1.16.22version>        dependency>    dependencies>dependencyManagement>

<dependencies>    <dependency>        <groupId>org.mybatis.spring.bootgroupId>        <artifactId>mybatis-spring-boot-starterartifactId>    dependency>    <dependency>        <groupId>mysqlgroupId>        <artifactId>mysql-connector-javaartifactId>    dependency>    <dependency>        <groupId>org.projectlombokgroupId>        <artifactId>lombokartifactId>    dependency>dependencies>

spring.datasource.driverClassName = com.mysql.jdbc.Driverspring.datasource.url = jdbc:mysql://192.168.1.1/test?useUnicode=true&characterEncoding=utf-8spring.datasource.username = testspring.datasource.password = 123456
mybatis.mapper-locations = classpath:mybatis/*.xmlmybatis.type-aliases-package = com.yibao.beta.dao.entity

package com.yibao.beta.biz.service.impl;
@Servicepublic class DemoServiceImpl implements DemoService {
    @Autowired    private UserMapper userMapper;
    @Override    public String test() {        UserDO user = userMapper.selectByPrimaryKey(1);        return user.toString();    }}

APPLICATION FAILED TO START***************************
Description:Field userMapper in com.yibao.beta.biz.service.impl.DemoServiceImpl required a bean of type 'com.yibao.beta.dao.mapper.UserMapper' that could not be found.

Action:Consider?defining?a?bean?of?type?'com.yibao.beta.dao.mapper.UserMapper'?in?your?configuration.

package com.yibao.beta.web;
@SpringBootApplication(scanBasePackages = "com.yibao.beta")@MapperScan("com.yibao.beta.dao.mapper")public class BetaWebApplication {
    public static void main(String[] args) {        SpringApplication.run(BetaWebApplication.class, args);    }}