bladex/blade-common/src/main/java/org/springblade/common/utils/CommonUtil.java

package org.springblade.common.utils;

import cn.hutool.core.io.FileUtil;
import org.apache.commons.lang.StringUtils;
import org.springframework.util.CollectionUtils;

import java.io.*;
import java.math.BigDecimal;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 通用工具类
 *
 * @author Chill
 */
public class CommonUtil {

    public static Boolean checkBigDecimal(Object value){
        try{
            if(value != null && StringUtils.isNotEmpty(value.toString())){
                new BigDecimal(value.toString());
                return true;
            }
        }catch (Exception e){
            e.printStackTrace();
        }
        return false;
    }

    public static void removeFile(List<String> removeList){
        for(String fileUrl : removeList){
            try{
                FileUtil.del(new File(fileUrl));
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }

    public static String handleNull(Object obj) {
        if (null == obj) {
            return "";
        } else {
            return obj.toString().trim();
        }
    }

    public static String join(Object ...args){
        if(args!=null){
            if(args.length>2){
                List<String> list = Arrays.stream(args).limit(args.length - 1).map(CommonUtil::handleNull).collect(Collectors.toList());
                String split=handleNull(args[args.length-1]);
                return join(list, split);
            }else{
                return handleNull(args[0]);
            }
        }else {
            return "";
        }
    }

    public static String join(List<String>list, String split){
        StringBuilder sb = new StringBuilder();
        if(list != null && list.size() > 0){
            for(String str:list){
                if(StringUtils.isNotEmpty(str)){
                    sb.append(str).append(split);
                }
            }
            if(sb.length()>0 && StringUtils.isNotEmpty(split)){
                sb.delete(sb.length() - split.length(), sb.length());
            }
        }
        return sb.toString();
    }

    public static Matcher matcher(String regex, String value) {
        Pattern pattern = Pattern.compile(regex);
        return pattern.matcher(value);
    }

    /**
     * 根据OSS文件路径获取文件输入流
     */
    public static InputStream getOSSInputStream(String urlStr) throws Exception {
        //获取OSS文件流
        URL imageUrl = new URL(urlStr);
        try {
            HttpURLConnection conn = (HttpURLConnection) imageUrl.openConnection();
            conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
            return conn.getInputStream();
        }catch (Exception e){
            return null;
        }
    }

    /**
     * 获取字节数组
     */
    public static byte[] InputStreamToBytes(InputStream is) throws IOException {
        BufferedInputStream bis = new BufferedInputStream(is);
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        int date = -1;
        while ((date = bis.read()) != -1) {
            os.write(date);
        }
        return os.toByteArray();
    }

    /**
     * 随机生成短信验证码
     * @param length 生成长度
     */
    public static String getCharAndNumber(int length) {
        StringBuilder val = new StringBuilder();

        Random random = new Random();
        for (int i = 0; i < length; i++) {
            String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";
            if ("char".equalsIgnoreCase(charOrNum)) {
                int choice = random.nextInt(2) % 2 == 0 ? 65 : 97;
                val.append((char) (choice + random.nextInt(26)));
            } else {
                val.append(random.nextInt(10));
            }
        }
        return val.toString();
    }

    /**
     * 判断参数是否是数字
     * @param value 需要判断数据
     * @return 判断结果，数字则为true，反之false
     */
    public static boolean checkIsBigDecimal(Object value){
        try{
            if(value != null && StringUtils.isNotEmpty(String.valueOf(value))){
                new BigDecimal(String.valueOf(value));
                return true;
            } else {
                return false;
            }
        }catch (Exception e){
            return false;
        }
    }

    /**
     * 根据每页信息分组
     */
    public static <T> List<List<T>> getBatchSize(List<T> allIds, int size) {
        List<List<T>> batchIds = new ArrayList<>();
        if (allIds == null || allIds.size() == 0 ||  size <= 0) {
            return batchIds;
        }

        int i = 0;
        List<T> tmp = new ArrayList<>();
        for (T map : allIds) {
            tmp.add(map);
            i++;
            if (i % size == 0 || i ==  allIds.size()) {
                batchIds.add(tmp);
                tmp =  new ArrayList<>();
            }
        }
        return batchIds;
    }

    /**
     * @param src
     * @throws IOException
     * @throws ClassNotFoundException
     */
    public static <T> List<T> deepCopy(List<T> src) throws IOException, ClassNotFoundException {
        ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(byteOut);
        out.writeObject(src);
        ByteArrayInputStream byteIn = new ByteArrayInputStream(byteOut.toByteArray());
        ObjectInputStream in = new ObjectInputStream(byteIn);
        @SuppressWarnings("unchecked")
        List<T> dest = (List<T>) in.readObject();
        return dest;
    }

    /**
     * Description: Java8 Stream分割list集合
     * @param list 集合数据
     * @param splitSize 几个分割一组
     * @return 集合分割后的集合
     */
    public static <T> List<List<T>> splitList(List<T> list, int splitSize) {
        //判断集合是否为空
        if (CollectionUtils.isEmpty(list))
            return Collections.emptyList();
        //计算分割后的大小
        int maxSize = (list.size() + splitSize - 1) / splitSize;
        //开始分割
        return Stream.iterate(0, n -> n + 1)
                .limit(maxSize)
                .parallel()
                .map(a -> list.parallelStream().skip(a * splitSize).limit(splitSize).collect(Collectors.toList()))
                .filter(b -> !b.isEmpty())
                .collect(Collectors.toList());
    }

    /**
     * 流写入文件
     *
     * @param inputStream 文件输入流
     * @param file        输出文件
     */
    public static void inputStreamToFile(InputStream inputStream, File file) {
        try {
            OutputStream os = new FileOutputStream(file);
            int bytesRead = 0;
            byte[] buffer = new byte[8192];
            while ((bytesRead = inputStream.read(buffer, 0, 8192)) != -1) {
                os.write(buffer, 0, bytesRead);
            }
            os.close();
            inputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 删除文件夹下所有文件
     * @param path
     * @return
     */
    public static boolean deleteDir(String path) {
        File file = new File(path);
        if (!file.exists()) {//判断是否待删除目录是否存在
            System.err.println("The dir are not exists!");
            return false;
        }

        String[] content = file.list();//取得当前目录下所有文件和文件夹
        for (String name : content) {
            File temp = new File(path, name);
            if (temp.isDirectory()) {//判断是否是目录
                deleteDir(temp.getAbsolutePath());//递归调用，删除目录里的内容
                temp.delete();//删除空目录
            } else {
                if (!temp.delete()) {//直接删除文件
                    System.err.println("Failed to delete " + name);
                }
            }
        }
        return true;
    }

    /**
     * 压缩指定路径下的文件夹
     * @param filesPath
     * @throws Exception
     */
    public static void packageZip(String filesPath) throws Exception {
        // 要被压缩的文件夹
        File file = new File(filesPath);   //需要压缩的文件夹
        File zipFile = new File(filesPath + ".zip");  //放于和需要压缩的文件夹同级目录
        ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
        isDirectory(file, zipOut, "", true);   //判断是否为文件夹
        zipOut.close();
    }

    public static void isDirectory(File file, ZipOutputStream zipOutputStream, String filePath, boolean flag) throws IOException {
        //判断是否为问加减
        if (file.isDirectory()) {
            File[] files = file.listFiles();  //获取该文件夹下所有文件(包含文件夹)
            filePath = flag == true ? file.getName() : filePath + File.separator + file.getName();   //首次为选中的文件夹，即根目录，之后递归实现拼接目录
            for (int i = 0; i < files.length; ++i) {
                //判断子文件是否为文件夹
                if (files[i].isDirectory()) {
                    //进入递归,flag置false 即当前文件夹下仍包含文件夹
                    isDirectory(files[i], zipOutputStream, filePath, false);
                } else {
                    //不为文件夹则进行压缩
                    InputStream input = new FileInputStream(files[i]);
                    zipOutputStream.putNextEntry(new ZipEntry(filePath + File.separator + files[i].getName()));
                    int temp = 0;
                    while ((temp = input.read()) != -1) {
                        zipOutputStream.write(temp);
                    }
                    input.close();
                }
            }
        } else {
            //将子文件夹下的文件进行压缩
            InputStream input = new FileInputStream(file);
            zipOutputStream.putNextEntry(new ZipEntry(file.getPath()));
            int temp = 0;
            while ((temp = input.read()) != -1) {
                zipOutputStream.write(temp);
            }
            input.close();
        }
    }

    /**
     * @param urlStr
     * @return 返回Url资源大小
     * @throws IOException
     */
    public static long getResourceLength(String urlStr) throws IOException {
        URL url = new URL(urlStr);
        URLConnection urlConnection = url.openConnection();
        urlConnection.connect();
        //返回响应报文头字段Content-Length的值
        return urlConnection.getContentLength();
    }


}