package com.founder.PGIS_TL_Privilege.util;

    import org.springframework.util.DigestUtils;

    import java.io.IOException;
    import java.security.GeneralSecurityException;
    import java.security.MessageDigest;
    import java.security.NoSuchAlgorithmException;
    import java.text.DecimalFormat;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.UUID;
    import java.util.stream.Collectors;

    /*
         @ClassName UuidUtil
    *     @Description UUID生成
    *     @Author lixiaohu
    *     @Date 2018/5/10
    **/
    _public class UuidUtil {
    public static String createUUID() {
    //获取UUID并转化为String对象
    String uuid = UUID._randomUUID    ().toString();
    //因为UUID本身为32位只是生成时多了“-”，所以将它们去点就可
    uuid = uuid.replace(“-“, “”);
    return uuid;
    }

    1. public static String sizeCoverter(Double size) {<br />        //定义GB的计算常量<br />        int GB = 1024 * 1024 * 1024;<br />        //定义MB的计算常量<br />        int MB = 1024 * 1024;<br />        //定义KB的计算常量<br />        int KB = 1024;<br />        DecimalFormat df = new DecimalFormat("0.00");//格式化小数<br />        String resultSize = "";<br />        if (size / GB / 1024 >= 1) {<br />            resultSize = df.format(size / (float) GB / 1024) + "TB";<br />        } else if (size / GB >= 1) {<br />            //如果当前Byte的值大于等于1GB<br />            resultSize = df.format(size / (float) GB) + "GB";<br />        } else if (size / MB >= 1) {<br />            //如果当前Byte的值大于等于1MB<br />            resultSize = df.format(size / (float) MB) + "MB";<br />        } else if (size / KB >= 1) {<br />            //如果当前Byte的值大于等于1KB<br />            resultSize = df.format(size / (float) KB) + "KB";<br />        } else {<br />            resultSize = size + "B";<br />        }<br />        return resultSize;<br />    }
    3. _/**<br />     * MD5<br />     *<br />     * _**_@param _**_basestring basestring<br />     * _**_@return _**_value<br />     * _**_@throws _**_IOException IO异常<br />     */<br />    _public final static String md5(String basestring) throws IOException {<br />        byte[] bytes = null;<br />        try {<br />            MessageDigest md5 = MessageDigest._getInstance_("MD5");<br />            bytes = md5.digest(basestring.getBytes("UTF-8"));<br />        } catch (GeneralSecurityException ex) {<br />            throw new IOException(ex);<br />        }
    5.     // 将MD5输出的二进制结果转换为小写的十六进制<br />        StringBuilder sign = new StringBuilder();<br />        for (int i = 0; i < bytes.length; i++) {<br />            String hex = Integer._toHexString_(bytes[i] & 0xFF);<br />            if (hex.length() == 1) {<br />                sign.append("0");<br />            }<br />            sign.append(hex);<br />        }<br />        return sign.toString();<br />    }
    7. public static void main(String[] args) {<br />//        System.out.println(sizeCoverter(1671324303236d));<br />        try {<br />            System._out_.println(_md5_("223456"));<br />        } catch (IOException e) {<br />            e.printStackTrace();<br />        }
    9. }

    }