stringutil.java

java 对string的各种函数

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   StringUtil.java

package com.cwc.util;

import java.io.*;
import java.net.*;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Enumeration;
import javax.servlet.http.*;

// Referenced classes of package com.cwc.util:
//            Handler, Md5

public class StringUtil
    implements Handler
{

    public StringUtil()
    {
    }

    public static final String replaceString(String s, String strb, String strh)
    {
        if(s == null || s.length() == 0)
            return s;
        StringBuffer tmp = new StringBuffer();
        int k;
        while((k = s.indexOf(strb)) >= 0) 
        {
            tmp.append(s.substring(0, k));
            tmp.append(strh);
            s = s.substring(k + strb.length());
        }
        if(s.length() > 0)
            tmp.append(s);
        return tmp.toString();
    }

    public static final String replaceEnter(String s)
    {
        if(s == null || s.length() == 0)
        {
            return s;
        } else
        {
            s = replaceString(s, "\r\n", "<br>");
            s = replaceString(s, "\n", "<br>");
            return s;
        }
    }

    public static final String ascii2Html(String s)
    {
        if(s == null || s.length() == 0)
        {
            return s;
        } else
        {
            s = replaceString(s, "&", "&amp;");
            s = replaceString(s, "\"", "&quot;");
            s = replaceString(s, "<", "&lt;");
            s = replaceString(s, ">", "&gt;");
            s = replaceString(s, " ", "&nbsp;");
            s = replaceString(s, "'", "&#39");
            s = replaceString(s, "\n", "<br>");
            return s;
        }
    }

    public static final String html2Ascii(String s)
    {
        if(s == null || s.length() == 0)
        {
            return s;
        } else
        {
            s = replaceString(s, "&amp;", "&");
            s = replaceString(s, "&quot;", "\"");
            s = replaceString(s, "&lt;", "<");
            s = replaceString(s, "&gt;", ">");
            s = replaceString(s, "&nbsp;", " ");
            s = replaceString(s, "&#39", "'");
            s = replaceString(s, "<br>", "\r\n");
            return s;
        }
    }

    public static final String GBK2ISO(String InputStr)
    {
        try
        {
            return new String(InputStr.getBytes("GBK"), "ISO8859_1");
        }
        catch(Exception e)
        {
            System.err.println("GBK2ISO??????????!");
        }
        return null;
    }

    public static final String GB23122UTF8(String InputStr)
    {
        try
        {
            return new String(InputStr.getBytes("GB2312"), "UTF-8");
        }
        catch(Exception e)
        {
            System.err.println("GBK2ISO??????????!");
        }
        return null;
    }

    public static final String ISO2UTF8(String InputStr)
    {
        try
        {
            return new String(InputStr.getBytes("ISO8859-1"), "UTF-8");
        }
        catch(Exception e)
        {
            System.out.println("ISO2UTF8");
        }
        return null;
    }

    public static final String Windows1252UTF8(String InputStr)
    {
        try
        {
            return new String(InputStr.getBytes("Windows-1252"), "UTF-8");
        }
        catch(Exception e)
        {
            System.out.println("Windows1252UTF8");
        }
        return null;
    }

    public static final String UTF82ISO(String InputStr)
    {
        try
        {
            return new String(InputStr.getBytes("UTF-8"), "ISO8859-1");
        }
        catch(Exception e)
        {
            System.err.println("GBK2ISO??????????!");
        }
        return null;
    }

    public static final String UTF82GBK(String InputStr)
    {
        try
        {
            return new String(InputStr.getBytes("UTF-8"), "GBK");
        }
        catch(Exception e)
        {
            return null;
        }
    }

    public static final String UTF82GB2312(String InputStr)
    {
        try
        {
            return new String(InputStr.getBytes("UTF-8"), "gb2312");
        }
        catch(Exception e)
        {
            return null;
        }
    }

    public static String ISO2GBK(String InputStr)
    {
        try
        {
            return new String(InputStr.getBytes("ISO8859_1"), "GBK");
        }
        catch(Exception e)
        {
            System.err.println("ISO2GBK??????????!");
        }
        return null;
    }

    public static final String dealNull(String str)
    {
        if(str == null)
            return "";
        else
            return str;
    }

    public static final String dealSql(String sql)
    {
        if(sql == null || sql.trim().length() == 0)
            return sql;
        String s = replaceString(sql.trim().replaceAll("\r", ""), "'", "''");
        s = replaceString(s, "\\", "\\\\");
        if(s.charAt(0) != '\'')
            s = "'" + s;
        if(!s.endsWith("'"))
            s = s + "'";
        return s;
    }

    public static final String getMultiString(String paraName[])
    {
        return getMultiString(paraName, ",");
    }

    public static final String getMultiString(String paraName[], String spChar)
    {
        if(paraName == null || paraName.length == 0)
            return "";
        StringBuffer valuesTemp = new StringBuffer();
        String specialChar = spChar;
        String values[] = paraName;
        int i = 0;
        for(i = 0; i < values.length - 1; i++)
            valuesTemp.append(values[i] + specialChar);

        valuesTemp.append(values[i]);
        return valuesTemp.toString();
    }

    public static final boolean isBlank(String str)
    {
        return str == null || str.trim().length() == 0;
    }

    public static final String getString(String strName)
    {
        return getString(strName, ((String) (null)));
    }

    public static final String getString(String strName, String def)
    {
        if(strName == null)
            return def;
        else
            return strName;
    }

    public static final int getInt(String strName)
    {
        return getInt(strName, 0);
    }

    public static final int getInt(String strName, int defaultvalue)
    {
        if(strName == null)
            return defaultvalue;
        try
        {
            return Integer.parseInt(strName.trim());
        }
        catch(Exception e)
        {
            return defaultvalue;
        }
    }

    public static final long getLong(String strName)
        throws Exception, NumberFormatException
    {
        if(strName == null)
            throw new Exception("getLong(String strName):Input value is NULL!");
        try
        {
            return Long.parseLong(strName.trim());
        }
        catch(NumberFormatException e)
        {
            throw new NumberFormatException("getLong NumberFormatException for input string:" + strName);
        }
    }

    public static final float getFloat(String strName)
        throws Exception, NumberFormatException
    {
        if(strName == null)
            throw new Exception("Input value is NULL!");
        try
        {
            return Float.parseFloat(strName.trim());
        }
        catch(NumberFormatException e)
        {
            throw new NumberFormatException("getFloat(String) NumberFormatException for input string:" + strName);
        }
    }

    public static final float getFloat(HttpServletRequest request, String strName)
        throws Exception, NumberFormatException
    {
        String val = request.getParameter(strName);
        if(val == null)
            return 0.0F;
        try
        {
            return Float.parseFloat(val.trim());
        }
        catch(NumberFormatException e)
        {
            throw new NumberFormatException("getFloat(request) NumberFormatException for input string:" + val);
        }
    }

    public static final float getFloat(HttpServletRequest request, String strName, float def)
        throws Exception, NumberFormatException
    {
        String val = request.getParameter(strName);
        if(val == null)
        {
            System.out.println("val is null,so return default!");
            return def;
        }
        try
        {
            return Float.parseFloat(val.trim());
        }
        catch(NumberFormatException e)
        {
            System.out.println("getFloat(HttpServletRequest request,String strName,float def) NumberFormatException for input string:" + val + ",so return default!");
        }
        return def;
    }

    public static final long getLong(String strName, long defaultvalue)
    {
        if(strName == null)
            return defaultvalue;
        try