redis做多字段排序的示例：

在redis編輯器中添加以下代碼：

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() + "\t" + history.getCorrectRate() + "\t" + history.getTimeConsumed() +
"\t" + history.getTimeConsumedMillisecond());
}
}
@Test
public void updateRank() {
Long userId = 25L;
//生成新的答題記錄
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);
}
}

輸入結果：

id 正確率 耗時
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