使用Java编程和springboot和mybatis框架,连接mysql数据库,给出具体程序,包含Controller层、Service层、Service实现类、Dao层以及Mapper.xml,获取中奖奖品的周排名 月排名 年排名 降序排列 取前5条数据

好的，以下是基于SpringBoot和MyBatis的Java程序，包含Controller层、Service层、Service实现类、Dao层以及Mapper.xml文件，可以连接MySQL数据库并获取中奖奖品的周排名、月排名、年排名，降序排列并取前5条数据：

1.首先创建一个实体类PrizeRecord

public class PrizeRecord {
    private int id;
    private String name;
    private String prize;
    private Date time;
    //省略getter和setter方法
}

2.在resources目录下创建application.yml文件，并配置数据库信息

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
    username: root
    password: 123456

3.创建Mapper.xml文件，命名为PrizeRecordMapper.xml，并在其中编写查询语句

<?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="com.example.mapper.PrizeRecordMapper">
    <select id="getWeeklyRank" parameterType="java.util.Date" resultType="com.example.entity.PrizeRecord">
        SELECT name,prize,time,count(*) as count FROM prize_record WHERE YEARWEEK(date_format(time,'%Y-%m-%d'),1) = YEARWEEK(date_format(#{date},'%Y-%m-%d'),1) GROUP BY name ORDER BY count DESC LIMIT 5
    </select>
    <select id="getMonthlyRank" parameterType="java.util.Date" resultType="com.example.entity.PrizeRecord">
        SELECT name,prize,time,count(*) as count FROM prize_record WHERE date_format(time,'%Y-%m') = date_format(#{date},'%Y-%m') GROUP BY name ORDER BY count DESC LIMIT 5
    </select>
    <select id="getYearlyRank" parameterType="java.util.Date" resultType="com.example.entity.PrizeRecord">
        SELECT name,prize,time,count(*) as count FROM prize_record WHERE YEAR(time)=YEAR(#{date}) GROUP BY name ORDER BY count DESC LIMIT 5
    </select>
</mapper>

4.创建Dao层，命名为PrizeRecordDao，并在其中定义查询方法

@Mapper
public interface PrizeRecordDao {
    List<PrizeRecord> getWeeklyRank(Date date);
    List<PrizeRecord> getMonthlyRank(Date date);
    List<PrizeRecord> getYearlyRank(Date date);
}

5.创建Service层，命名为PrizeRecordService，并在其中定义调用Dao层的方法

public interface PrizeRecordService {
    List<PrizeRecord> getWeeklyRank(Date date);
    List<PrizeRecord> getMonthlyRank(Date date);
    List<PrizeRecord> getYearlyRank(Date date);
}

6.创建Service实现类，命名为PrizeRecordServiceImpl，并在其中实现Service层的方法，调用Dao层的方法

@Service
public class PrizeRecordServiceImpl implements PrizeRecordService {
    @Autowired
    private PrizeRecordDao prizeRecordDao;

    @Override
    public List<PrizeRecord> getWeeklyRank(Date date) {
        return prizeRecordDao.getWeeklyRank(date);
    }

    @Override
    public List<PrizeRecord> getMonthlyRank(Date date) {
        return prizeRecordDao.getMonthlyRank(date);
    }

    @Override
    public List<PrizeRecord> getYearlyRank(Date date) {
        return prizeRecordDao.getYearlyRank(date);
    }
}

7.创建Controller层，命名为PrizeRecordController，并在其中定义请求接口和调用Service层的方法

@RestController
@RequestMapping("/prizeRecord")
public class PrizeRecordController {
    @Autowired
    private PrizeRecordService prizeRecordService;

    @GetMapping("/weeklyRank")
    public List<PrizeRecord> getWeeklyRank(@RequestParam("date") Date date) {
        return prizeRecordService.getWeeklyRank(date);
    }

    @GetMapping("/monthlyRank")
    public List<PrizeRecord> getMonthlyRank(@RequestParam("date") Date date) {
        return prizeRecordService.getMonthlyRank(date);
    }

    @GetMapping("/yearlyRank")
    public List<PrizeRecord> getYearlyRank(@RequestParam("date") Date date) {
        return prizeRecordService.getYearlyRank(date);
    }
}

8.启动SpringBoot程序，并访问以下接口即可获取中奖奖品的周排名、月排名、年排名，降序排列并取前5条数据：

http://localhost:8080/prizeRecord/weeklyRank?date=2022-03-06
http://localhost:8080/prizeRecord/monthlyRank?date=2022-03-01
http://localhost:8080/prizeRecord/yearlyRank?date=2022-01-01

以上就是使用Java编程和SpringBoot和MyBatis框架连接MySQL数据库并获取中奖奖品的周排名、月排名、年排名，降序排列并取前5条数据的具体程序。