redis如何做多字段排序 redis有序集合多字段排序

文章摘要：redis如何做多字段排序 redis有序集合多字段排序

redis做多字段排序的示例： 在redis编辑器中添加以下代码： package com.example.d […]

redis做多字段排序的示例：

在redis编辑器中添加以下代码：

package com.example.demo;

import com.example.demo.common.Constant;

import com.example.demo.mapper.QuestionAnswerHistoryMapper;

import com.example.demo.model.QuestionAnswerHistory;

import com.example.demo.service.QuestionAnswerHistoryService;

import com.example.demo.thread.BaseTest;

import org.apache.commons.lang3.RandomUtils;

import org.junit.Test;

import org.springframework.beans.factory.annotation.Autowired;

import java.math.BigDecimal;

import java.util.List;

/**

* @author wzx

* @time 2019/6/16

*/

public class QuestionAnswerHistoryTest extends BaseTest {

@Autowired

private QuestionAnswerHistoryMapper historyMapper;

@Autowired

private QuestionAnswerHistoryService historyService;

@Test

public void test() {

for (int i = 1; i < 101; i++) {

QuestionAnswerHistory history = new QuestionAnswerHistory();

history.setUserId((long) i);

history.setAnswerFinish(true);

BigDecimal bigDecimal = BigDecimal.valueOf(RandomUtils.nextDouble(0, 1))

.setScale(2, BigDecimal.ROUND_HALF_UP);

history.setCorrectRate(bigDecimal.doubleValue());

history.setTimeConsumed(RandomUtils.nextInt(15, 50));

history.setTimeConsumedMillisecond(RandomUtils.nextInt(0, 1000));

history.setStatus(Constant.GenerictStatus.NORMAL);

historyMapper.insert(history);

}

}

@Test

public void queryRanking() {

Listranking = historyService.getRanking();

for (QuestionAnswerHistory history : ranking) {

System.out.println(history.getUserId() + " " + history.getCorrectRate() + " " + history.getTimeConsumed() +

" " + history.getTimeConsumedMillisecond());

}

}

@Test

public void updateRank() {

Long userId = 25L;

//生成新的答题记录

QuestionAnswerHistory history = new QuestionAnswerHistory();

history.setUserId(userId);

history.setAnswerFinish(true);

BigDecimal bigDecimal = BigDecimal.valueOf(RandomUtils.nextDouble(0, 1))

.setScale(2, BigDecimal.ROUND_HALF_UP);

history.setCorrectRate(bigDecimal.doubleValue());

history.setTimeConsumed(RandomUtils.nextInt(15, 50));

history.setTimeConsumedMillisecond(RandomUtils.nextInt(0, 1000));

history.setStatus(Constant.GenerictStatus.NORMAL);

historyService.updateRank(history);

}

}

输入结果：

id 正确率 耗时

74 0.94 38 151

37 0.93 16 802

97 0.92 31 475

63 0.92 36 74

35 0.92 39 516

85 0.92 39 525

17 0.9 19 821

55 0.9 35 268

64 0.89 37 39

19 0.88 43 350

49 0.86 25 373

78 0.86 42 296

76 0.84 19 399

21 0.84 38 365

54 0.83 26 7

70 0.79 30 213

20 0.78 18 112

46 0.78 24 789

27 0.76 23 195

33 0.76 29 414

7 0.75 20 661