Lifyray笑傲江湖之API总结TextUtil

package liferay;

/**
*
*/

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Date;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
* @author Ivan
*
*/
public class TextUtil {

    private static Pattern N = Pattern.compile("\n");
    private static Pattern R = Pattern.compile("\r");
    private static Pattern RN = Pattern.compile("\r\n");
    private static Pattern NR = Pattern.compile("\n\r");
    private final static String BR = "<br/>";

    private static NumberFormat decimalFormat = DecimalFormat
            .getNumberInstance();

    public static String doubleToText(double number) {
        String txt = doubleToText(number, 1);
        return txt;
    }

    public static String doubleToText(double number, int digit) {
        String txt = "";
        if (number > 0) {
            decimalFormat.setMaximumFractionDigits(digit);
            txt = decimalFormat.format(number);
        }
        return txt;
    }

    public static String doubleToText2(double number, int digit) {
        String txt = "";
        if (number > 0) {
            DecimalFormat decimalFormat2 = new DecimalFormat();
            decimalFormat2.setGroupingSize(0);
            decimalFormat2.setMaximumFractionDigits(digit);
            txt = decimalFormat2.format(number);
        }
        return txt;
    }

    public static String doubleToText(double number, String format) {
        if (format.equals("")) {
            format = "#,##0.00";
        }

        String txt = "";
        if (number > 0) {
            DecimalFormat decimalFormat = new DecimalFormat(format);
            txt = decimalFormat.format(number);
        }
        return txt;
    }

    public static String textToHtml(String txt) {
        Matcher m = RN.matcher(txt);
        txt = m.replaceAll(BR);
        m = NR.matcher(txt);
        txt = m.replaceAll(BR);
        m = N.matcher(txt);
        txt = m.replaceAll(BR);
        m = R.matcher(txt);
        txt = m.replaceAll(BR);
        return txt;
    }

    public static void main(String[] args) {
//        long longDuration = new Date().getTime() - 46450000;
//        longDuration = new Date().getTime() - longDuration;
//        double doubleDuration = longDuration;
//        doubleDuration = doubleDuration / 86400000;
//        System.out.println(doubleDuration);
//        System.out.println(doubleToText(doubleDuration));

        String sql = getRandomString(5);
        System.out.println(sql);

    }

    public static String doSubAssignLength(String str, int length) {
        String commtents = null;
        if (str.length() > length) {
            commtents = str.substring(0, length - 1) + "...";
        } else {
            commtents = str;
        }
        return commtents;
    }

    public static String doSubString(String str) {
        String commtents = null;
        if (str.length() > 26) {
            commtents = str.substring(0, 25) + "...";
        } else {
            commtents = str;
        }
        return commtents;
    }

    public static String getURL(String layoutId, String url) {
        StringBuffer buffer = new StringBuffer();
        buffer.append(url);
        if (layoutId != null && !"0".equals(layoutId)) {
            int start = url.lastIndexOf("/");
            int end = url.indexOf("?");
            buffer.replace(start, end, layoutId);
        }
        return buffer.toString();
    }

    public static String toUpperCase(String tableName) {
        String prefix = tableName.substring(0, 1).toUpperCase();
        String results = prefix + tableName.substring(1);
        return results;
    }

    public static String getRandomString(int length) {
        char[] charArray = new char[length];
        for (int i = 0; i < length; i++) {
            Random r = new Random();
            int n = r.nextInt(123);
            while (n < 48 || (n > 57 && n < 65) || (n > 90 && n < 97)
                    || n > 122) {// (!((n>=48 && n<=57) || (n>=65 && n<=90)
                                    // && (n>=97 && n<=122))){
                n = r.nextInt(123);
            }
            charArray[i] = (char) n;
        }
        return String.valueOf(charArray);
    }

    public static String convertFileSize(long filesize) {
        String strUnit = "Bytes";
        String strAfterComma = "";
        int intDivisor = 1;
        if (filesize >= 1024 * 1024) {
            strUnit = " MB";
            intDivisor = 1024 * 1024;
        } else if (filesize >= 1024) {
            strUnit = " KB";
            intDivisor = 1024;
        }
        if (intDivisor == 1)
            return filesize + " " + strUnit;

        strAfterComma = "" + 100 * (filesize % intDivisor) / intDivisor;
        if (strAfterComma == "")
            strAfterComma = ".0";

        return filesize / intDivisor + "." + strAfterComma + " " + strUnit;

    }

}