Spring Boot:Idea从零开始初始化后台项目的教程

repositories {
    //使用阿里云仓库，提高国内依赖库下载速度
    Maven { url "Http://maven.aliyun.com/nexus/content/groups/public" }
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-actuator'
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'org.springframework.boot:spring-boot-starter-data-redis'
    implementation 'org.springframework.boot:spring-boot-starter-web'
    implementation 'org.mybatis.spring.boot:mybatis-spring-boot-starter:2.1.2'
    implementation 'com.alibaba:fastJSON:1.2.68'
    implementation 'org.apache.commons:commons-lang3:3.10'
    //数据库配置的日志类com.mysql.cj.log.Slf4JLogger在这个包中
    runtime('mysql:mysql-connector-java')
    testImplementation('org.springframework.boot:spring-boot-starter-test') {
        exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
    }
}

#默认启动dev环境
spring.profiles.active=dev
#调整web后台服务端口为9080，不设置默认为8080
server.port=9080
#mybatis配置文件地址
mybatis.config-location=classpath:mybatis/mybatis-config.xml
#mybatis mapper文件地址
mybatis.mapper-locations=classpath:mybatis/mapper
    private int status;
    private String description;
    private Object data;
    public HResponse() {
    }
    public HResponse(int status, String description, Object data) {
        this.status = status;
        this.description = description;
        this.data = data;
    }
    public static HResponse success() {
        return new HResponse(200, "操作成功", null);
    }
    public static HResponse success(String description) {
        return new HResponse(200, description, null);
    }
    public static HResponse success(Object data) {
        return new HResponse(200, "success", data);
    }
    public static HResponse success(String description, Object data) {
        return new HResponse(200, description, data);
    }
    public static HResponse error(String description) {
        return new HResponse(400, description, null);
    }
    public static HResponse error(String description, Object data) {
        return new HResponse(400, description, data);
    }
    public int getStatus() {
        return status;
    }
    public void setStatus(int status) {
        this.status = status;
    }
    public Object getData() {
        return data;
    }
    public void setData(Object data) {
        this.data = data;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
}

	private final StringRedisTemplate redisTemplate;
    private final SqlSession sqlSession;
    public CommonController(StringRedisTemplate redisTemplate) {
        this.redisTemplate = redisTemplate;
    }
    @PostMapping("/getRedisValue")
    public HResponse getRedisValue(String key) {
        this.logger.info("请求获取redis key为:{} 的值", key);
        return HResponse.success(new jsONObject().fluentPut("key", key).fluentPut("value", this.redisTemplate.opsForValue().get(key)));
    }
    @PostMapping("/setRedisValue")
    public HResponse getRedisValue(String key, String value) {
        if (StringUtils.isBlank(key)) {
            return HResponse.error("键 不能为空");
        }
        if (StringUtils.isBlank(value)) {
            return HResponse.error("值 不能为空");
        }
        this.logger.info("请求设置redis key为:{} 的值为 {}", key, value);
        this.redisTemplate.opsForValue().set(key.trim(), value.trim());
        return HResponse.success();
    }

@Entity
@Table(name = "h_company")
@Where(clause = "id > 0")
public class HCompany {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private String name;
    private String shortName;
    private String address;
    private String tel;
    private String remark;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getShortName() {
        return shortName;
    }
    public void setShortName(String shortName) {
        this.shortName = shortName;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getTel() {
        return tel;
    }
    public void setTel(String tel) {
        this.tel = tel;
    }
    public String getRemark() {
        return remark;
    }
    public void setRemark(String remark) {
        this.remark = remark;
    }
}

@Repository
@Where(clause = "id > 0")
public interface CompanyRepository extends PagingAndSortingRepository<HCompany, Integer>, JpaRepository<HCompany, Integer> {
}

    @PostMapping("/getAllCompany")
    public HResponse getAllCompany() {
        return HResponse.success(this.companyRepository.findAll());
    }

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="company">
    <select id="getAll" resultType="java.util.Map">
        select * from h_company
    </select>
</mapper>

    @PostMapping("/getAllCompanyByMybatis")
    public HResponse getAllCompanyByMybatis() {
        return HResponse.success(this.sqlSession.selectList("company.getAll"));
    }

@RestController
@RequestMapping("/common")
public class CommonController {
    private Logger logger = LoggerFactory.getLogger(this.getClass());
    private final StringRedisTemplate redisTemplate;
    private final CompanyRepository companyRepository;
    private final SqlSession sqlSession;
    public CommonController(StringRedisTemplate redisTemplate, CompanyRepository companyRepository, SqlSession sqlSession) {
        this.redisTemplate = redisTemplate;
        this.companyRepository = companyRepository;
        this.sqlSession = sqlSession;
    }
    @PostMapping("/getRedisValue")
    public HResponse getRedisValue(String key) {
        this.logger.info("请求获取redis key为:{} 的值", key);
        return HResponse.success(new JSONObject().fluentPut("key", key).fluentPut("value", this.redisTemplate.opsForValue().get(key)));
    }
    @PostMapping("/setRedisValue")
    public HResponse getRedisValue(String key, String value) {
        if (StringUtils.isBlank(key)) {
            return HResponse.error("键 不能为空");
        }
        if (StringUtils.isBlank(value)) {
            return HResponse.error("值 不能为空");
        }
        this.logger.info("请求设置redis key为:{} 的值为 {}", key, value);
        this.redisTemplate.opsForValue().set(key.trim(), value.trim());
        return HResponse.success();
    }
    @PostMapping("/getAllCompany")
    public HResponse getAllCompany() {
        return HResponse.success(this.companyRepository.findAll());
    }
    @PostMapping("/getAllCompanyByMybatis")
    public HResponse getAllCompanyByMybatis() {
        return HResponse.success(this.sqlSession.selectList("company.getAll"));
    }
}