69 lines
2.2 KiB
Java
69 lines
2.2 KiB
Java
package com.jero.modules.utils;
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import com.fasterxml.jackson.annotation.JsonIgnore;
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import com.github.javafaker.Faker;
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import java.time.LocalDate;
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import java.time.format.DateTimeFormatter;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* @author: Mzaxd
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* @Date: 2024/4/9 9:35
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*/
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public class RandomNumberUtil {
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public static final Faker faker = new Faker();
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public static double getRandomDouble() {
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// 生成一个在0到100之间，小数点后有2位的随机浮点数
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return faker.number().randomDouble(2, 0, 100);
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}
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public static int getRandomInt() {
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return faker.number().randomDigit();
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}
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public static int getRandomIntBetween(int min, int max) {
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return faker.number().numberBetween(min, max);
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}
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// 生成指定大小和类型的列表，填充伪随机数据
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public static <T> List<T> generateFakeDataList(int size, Class<T> type) {
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List<T> resultList = new ArrayList<>();
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for (int i = 0; i < size; i++) {
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if (type.equals(Double.class)) {
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// 对于 Double 类型，生成伪随机双精度值
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resultList.add(type.cast(faker.number().randomDouble(2, 50, 100)));
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} else if (type.equals(Integer.class)) {
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// 对于 Integer 类型，生成伪随机整数值
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resultList.add(type.cast(faker.number().numberBetween(1, 100)));
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} else {
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// 可以扩展更多的类型支持
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throw new IllegalArgumentException("Unsupported type: " + type);
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}
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}
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return resultList;
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}
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// 生成包含今天及之前29天日期的列表，格式为"MM-DD"
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public static List<String> getLast30DaysFormattedDatesAscending() {
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List<String> datesList = new ArrayList<>();
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LocalDate startDate = LocalDate.now().minusDays(29); // 从30天前开始
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DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MM-dd");
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for (int i = 0; i < 30; i++) {
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LocalDate date = startDate.plusDays(i); // 递增日期
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String formattedDate = date.format(formatter);
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datesList.add(formattedDate);
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}
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return datesList;
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}
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}
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