cn.jiangzeyin.util.StringUtil Maven / Gradle / Ivy

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package cn.jiangzeyin.util;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.StringTokenizer;

/**
 * 字符串工具类
 *
 * @author jiangzeyin
 */
public final class StringUtil {


    /**
     * 过滤 < ,   >   , \n 字符的方法。
     *
     * @param input 需要过滤的字符
     * @return 完成过滤以后的字符串
     */
    public static String filterHTML(String input) {
        if (input == null) {
            return null;
        }
        if (input.length() == 0) {
            return input;
        }
        input = input.trim();
        // input = input.replaceAll("　", "");
        // input = input.replaceAll("&", "&");
        input = input.replaceAll("<", "<");
        input = input.replaceAll(">", ">");
        // input = input.replaceAll(" ", " ");
        input = input.replaceAll("'", "'");
        // input = input.replaceAll("\"", """);
        //input = input.replaceAll("\n", "
");

        // String s = "<:<,>:>, : ,':',\":",\n:
";
        // StringBuffer sb = new StringBuffer(input);
        // String[] t = StringToArray(s, ",");
        // for (String string : t) {
        // String[] temp = string.split(":");
        // int i = sb.indexOf(temp[0]);
        // while (i > -1) {
        // int oldLen = temp[0].length();
        // int newLen = temp[1].length();
        // sb.delete(i, i + oldLen);
        // sb.insert(i, temp[1]);
        // i = sb.indexOf(temp[0], i + newLen);
        // }
        // }
        // return sb.toString();
        return input;
    }


    /**
     * 编译html
     *
     * @param input inp
     * @return str
     */
    public static String compileHtml(String input) {
        if (input == null) {
            return null;
        }
        if (input.length() == 0) {
            return input;
        }
        input = input.replaceAll("&", "&");
        input = input.replaceAll("<", "<");
        input = input.replaceAll(">", ">");
        input = input.replaceAll(" ", " ");
        input = input.replaceAll("'", "'");
        input = input.replaceAll(""", "\"");
        return input.replaceAll("
", "\n");
    }


    public static int parseInt(String num) {
        return parseInt(num, 0);
    }

    public static int parseInt(Object num) {
        if (num == null)
            return 0;
        return parseInt(num.toString(), 0);
    }

    public static int parseInt(Object obj, int default_) {
        return parseInt(convertNULL(obj), default_);
    }

    public static int parseInt(String num, int default_) {
        if ((num == null) || (num.length() == 0))
            return default_;

        try {
            return Integer.parseInt(num);
        } catch (NumberFormatException ignored) {
        }
        return default_;
    }

    public static long parseLong(String num) {
        if (num == null)
            return 0L;
        try {
            return Long.parseLong(num);
        } catch (NumberFormatException ignored) {
        }
        return 0L;
    }

    public static float parseFloat(String num) {
        if (num == null)
            return 0.0F;
        try {
            return Float.parseFloat(num);
        } catch (NumberFormatException ignored) {
        }
        return 0.0F;
    }

    public static double parseDouble(String num) {
        if (num == null)
            return 0.0D;
        try {
            return Double.parseDouble(num);
        } catch (NumberFormatException ignored) {
        }
        return 0.0D;
    }

    /**
     * 编码字符串
     *
     * @param str str
     * @return s
     */
    public static String getUTF8(String str) {
        if (str == null)
            return "";
        try {
            return new String(str.getBytes("ISO-8859-1"), "utf-8");
        } catch (UnsupportedEncodingException e) {
            return "";
        }
    }


    public static String convertNULL(String input) {
        if (input == null)
            return "";
        return input.trim().intern();
    }

    public static String convertNULL(Object input) {
        if (input == null)
            return "";
        return convertNULL(input.toString());
    }



}