package com.ruoyi.framework.util;
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import org.springframework.stereotype.Component;
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import org.springframework.web.multipart.MultipartFile;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.Objects;
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import java.util.Random;
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import java.util.StringJoiner;
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@Component
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public class MyUtil<T> {
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/**
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* 自定义调试工具类
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* @return
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*/
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public static void PrintLog(String str){
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// 类名
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String className = Thread.currentThread().getStackTrace()[2].getClassName();
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// 函数名
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String methodName = Thread.currentThread().getStackTrace()[2].getMethodName();
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System.out.println("\033[1;94m" + className + "-->" + methodName + "-->" + str + "\033[0m");
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}
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/**
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* 日期工具类
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* @return
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*/
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public static String MyDateFormat(){
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//获取日期
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//导 import java.util.Date; 下的包
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Date date = new Date();
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
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return sdf.format(date);
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}
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/**
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* 获取随机加密盐
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* @param n 位数
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* @return 返回随机加密盐
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*/
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public static String getSalt(int n) {
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char[] chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890!@$%^&*.?".toCharArray();
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < n; i++) {
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char c = chars[new Random().nextInt(chars.length)];
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sb.append(c);
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}
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return sb.toString();
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}
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/**
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* 获取随机数字
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* @param n 位数
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* @return 返回随机值
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*/
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public static String getNumber(int n) {
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char[] chars = "1234567890".toCharArray();
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < n; i++) {
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char c = chars[new Random().nextInt(chars.length)];
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sb.append(c);
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}
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return sb.toString();
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}
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public static String getTimeSixNumberCode(String prefix, String keyName){
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SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
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String format = simpleDateFormat.format(new Date());
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String timeStr = format.replace("-", "");
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long incrNum = RedisUtil.incr(keyName, 1);
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if(incrNum == 1){
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RedisUtil.expire(keyName, 60 * 60 * 24);
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}
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String sixIncr = String.format("%06d", incrNum);
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return prefix + timeStr + sixIncr;
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}
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/**
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* 判断是否为excel
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* @param file
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* @return
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*/
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public static boolean isExcelFile(MultipartFile file) {
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if (file.isEmpty()) {
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return false;
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}
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String originalFilename = file.getOriginalFilename();
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if (originalFilename == null) {
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return false;
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}
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String[] parts = originalFilename.split("\\.");
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if (parts.length == 0) {
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return false;
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}
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String fileExtension = parts[parts.length - 1].toLowerCase();
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return fileExtension.equals("xls") || fileExtension.equals("xlsx");
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}
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/**
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*
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* @param delimiter
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* @param elements
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* @return
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*/
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public static String joinChars(String delimiter,String... elements){
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Objects.requireNonNull(delimiter);
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Objects.requireNonNull(elements);
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// Number of elements not likely worth Arrays.stream overhead.
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StringJoiner joiner = new StringJoiner(delimiter);
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for (String cs: elements) {
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joiner.add(Objects.isNull(cs)?"":cs);
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}
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return joiner.toString();
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}
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}
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