??????相信大家一定可以想到UBB代碼的解析，其實就是將“[b][/b]”這樣的格式轉換成““”就可以了，但是怎么轉換呢？答案是用正則表達式。利用上一期講到的正則表達式類(sony.utils.Regex)中的eregi_replace替換方法，可以很輕松地做到。下面是一段示例。
String s="[b]這是粗體[/b]";
String result;
result = Regex.eregi_replace("[b](.+?)[/b]","“$1“", s);
System.out.println(result);
//打印結果是：
//“這是粗體“。
這么簡單嗎？是的，我們只需要將其它的UBB Tag作類似的替換就實現了UBB代碼的解析了。
下面給出一個UBB類.
/***************************UbbCode.java****************************************/
import java.util.regex.Matcher; //導入所需要的類
import java.util.regex.Pattern;
public class UbbCode //類定義
{
private String source; //待轉化的HTML代碼字符串
private String ubbTags[]; //UBB標記數組
private String htmlTags[]; //HTML標記數組
//初始化,分別為UBB標記數組和HTML標記數組賦值
public UbbCode()
{
byte byte0 = 74;
source = new String();
ubbTags = new String[byte0];
htmlTags = new String[byte0];
ubbTags[0] = "[b]";
htmlTags[0] = "<b>";
ubbTags[1] = "[/b]";
htmlTags[1] = "</b>";
ubbTags[2] = "[i]";
htmlTags[2] = "<em>";
ubbTags[3] = "[/i]";
htmlTags[3] = "</em>";
ubbTags[4] = "[quote]";
htmlTags[4] = "<div style=\"border-style:dashed;background-color:#CCCCCC;border-width:thin;border-color:#999999\"><br><em>";
ubbTags[5] = "[/quote]";
htmlTags[5] = "</em><br><br></div>";
ubbTags[6] = "[/size]";
htmlTags[6] = "</font>";
ubbTags[7] = "[size=6]";
htmlTags[7] = "<font style=\"font-size:6px\">";
ubbTags[8] = "[size=8]";
htmlTags[8] = "<font style=\"font-size:8px\">";
ubbTags[9] = "[size=10]";
htmlTags[9] = "<font style=\"font-size:10px\">";
ubbTags[10] = "[size=12]";
htmlTags[10] = "<font style=\"font-size:12px\">";
ubbTags[11] = "[size=14]";
htmlTags[11] = "<font style=\"font-size:14px\">";
ubbTags[12] = "[size=18]";
htmlTags[12] = "<font style=\"font-size:18px\">";
ubbTags[13] = "[size=24]";
htmlTags[13] = "<font style=\"font-size:24px\">";
ubbTags[14] = "[size=36]";
htmlTags[14] = "<font style=\"font-size:36px\">";
//字體
ubbTags[15] = "[/font]";
htmlTags[15] = "</font>";
ubbTags[16] = "[font=Arial]";
htmlTags[16] = "<font face=\"Arial\">";
ubbTags[17] = "[font=Arial Black]";
htmlTags[17] = "<font face=\"Arial Black\">";
ubbTags[18] = "[font=Verdana]";
htmlTags[18] = "<font face=\"Verdana\">";
ubbTags[19] = "[font=Times New Roman]";
htmlTags[19] = "<font face=\"Times New Roman\">";
ubbTags[20] = "[font=Garamond]";
htmlTags[20] = "<font face=\"Garamond\">";
ubbTags[21] = "[font=Courier New]";
htmlTags[21] = "<font face=\"Courier New\">";
ubbTags[22] = "[font=Webdings]";
htmlTags[22] = "<font face=\"Webdings\">";
ubbTags[23] = "[font=Wingdings]";
htmlTags[23] = "<font face=\"Wingdings\">";
ubbTags[24] = "[font=隸書]";
htmlTags[24] = "<font face=\"隸書\">";
ubbTags[25] = "[font=幼圓]";
htmlTags[25] = "<font face=\"幼圓\">";
ubbTags[26] = "[font=方正舒體]";
htmlTags[26] = "<font face=\"方正舒體\">";
ubbTags[27] = "[font=方正姚體]";
htmlTags[27] = "<font face=\"方正姚體\">";
ubbTags[28] = "[font=仿宋_GB2312]";
htmlTags[28] = "<font face=\"仿宋_GB2312\">";
ubbTags[29] = "[font=黑體]";
htmlTags[29] = "<font face=\"黑體\">";
ubbTags[30] = "[font=華文彩云]";
htmlTags[30] = "<font face=\"華文彩云\">";
ubbTags[31] = "[font=華文細黑]";
htmlTags[31] = "<font face=\"華文細黑\">";
ubbTags[32] = "[font=華文新魏]";
htmlTags[32] = "<font face=\"華文新魏\">";
ubbTags[33] = "[font=華文中宋]";
htmlTags[33] = "<font face=\"華文中宋\">";
ubbTags[34] = "[font=華文行楷]";
htmlTags[34] = "<font face=\"華文行楷\">";
ubbTags[35] = "[font=楷體_GB2312]";
htmlTags[35] = "<font face=\"楷體_GB2312\">";
ubbTags[36] = "[font=隸書]";
htmlTags[36] = "<font face=\"隸書\">";
ubbTags[37] = "[font=華文楷體]";
htmlTags[37] = "<font face=\"華文楷體\">";
ubbTags[38] = "[font=宋體]";
htmlTags[38] = "<font face=\"宋體\">";
ubbTags[39] = "[font=新宋體";
htmlTags[39] = "<font face=\"新宋體\">";
ubbTags[40] = "[font=幼圓";
htmlTags[40] = "<font face=\"幼圓\">";
//字體顏色
ubbTags[41] = "[red]";
htmlTags[41] = "<font color=\"red\">";
ubbTags[42] = "[/red]";
htmlTags[42] = "</font>";
ubbTags[43] = "[blue]";
htmlTags[43] = "<font color=\"blue\">";
ubbTags[44] = "[/blue]";
htmlTags[44] = "</font>";
ubbTags[45] = "[yellow]";
htmlTags[45] = "<font color=\"yellow\">";
ubbTags[46] = "[/yellow]";
htmlTags[46] = "</font>";
ubbTags[47] = "[green]";
htmlTags[47] = "<font color=\"green\">";
ubbTags[48] = "[/green]";
htmlTags[48] = "</font>";
ubbTags[49] = "[f]";
htmlTags[49] = "<marquee width=\"400\" scrolldelay=\"30\" scrollamount=\"1\" onmouseover=\"this.stop()\" onmouseout=\"this.start()\">";
//標題
ubbTags[50] = "[h1]";
htmlTags[50] = "<h1>";
ubbTags[51] = "[/h1]";
htmlTags[51] = "</h1>";
ubbTags[52] = "[h2]";
htmlTags[52] = "<h2>";
ubbTags[53] = "[/h2]";
htmlTags[53] = "</h2>";
ubbTags[54] = "[h3]";
htmlTags[54] = "<h3>";
ubbTags[55] = "[/h3]";
htmlTags[55] = "</h3>";
ubbTags[56] = "[h4]";
htmlTags[56] = "<h4>";
ubbTags[57] = "[/h4]";
htmlTags[57] = "</h4>";
ubbTags[58] = "[h5]";
htmlTags[58] = "<h5>";
ubbTags[59] = "[/h5]";
htmlTags[59] = "</h5>";
ubbTags[60] = "[h6]";
htmlTags[60] = "<h6>";
ubbTags[61] = "[/h6]";
htmlTags[61] = "</h6>";
ubbTags[62] = "[hr]";
htmlTags[62] = "<hr>";
ubbTags[63] = "[img]";
htmlTags[63] = "<br><img src=\"";
ubbTags[64] = "[/img]";
htmlTags[64] = "\"><br>";
ubbTags[65] = "[center]";
htmlTags[65] = "<div align=\"center\">";
ubbTags[66] = "[/center]";
htmlTags[66] = "</div>";
ubbTags[67] = "[/f]";
htmlTags[67] = "</marquee>";
ubbTags[68] = "[left]";
htmlTags[68] = "<div align=\"left\">";
ubbTags[69] = "[/left]";
htmlTags[69] = "</div>";
ubbTags[70] = "[right]";
htmlTags[70] = "<div align=\"right\">";
ubbTags[71] = "[/right]";
htmlTags[71] = "</div>";
ubbTags[72] = "[u]";
htmlTags[72] = "<u>";
ubbTags[73] = "[/u]";
htmlTags[73] = "</u>";
}
private String replace(String s, String s1, String s2) {
? StringBuffer stringbuffer = new StringBuffer();
? for(int i = 0; i < s1.length(); i++) {
? char c = s1.charAt(i);
? switch(c) {
?? case 91: // '['
??? stringbuffer.append("\\[");
??? break;
?? case 93: // ']'
???? stringbuffer.append("\\]");
???? break;
?? default:
???? stringbuffer.append(c);
???? break;
?? }
}
Pattern pattern = Pattern.compile(stringbuffer.toString());
Matcher matcher = pattern.matcher(s);
StringBuffer stringbuffer1 = new StringBuffer();
for(boolean flag = matcher.find(); flag; flag = matcher.find())
matcher.appendReplacement(stringbuffer1, s2);
return matcher.appendTail(stringbuffer1).toString();
}
private String replaceNormalUBBCode(String s)
{
String s1 = new String(s);
for(int i = 0; i < ubbTags.length; i++)
s1 = replace(s1, ubbTags[i], htmlTags[i]);
return s1;
}
private String replaceURL(String s)
{
StringBuffer stringbuffer = new StringBuffer(s);
String s1 = new String();
int i = s.indexOf("[url]");
int j = s.indexOf("[/url]");
if(i != -1 && j != -1 && i < j)
{
String s2 = s.substring(i + 5, j);
String s3 = "<a href=\"" + s2 + "\">" + s2 + "</a>";
stringbuffer.replace(i, j + 6, s3);
}
return stringbuffer.toString();
}
private String replaceEmail(String s)
{
StringBuffer stringbuffer = new StringBuffer(s);
String s1 = new String();
int i = s.indexOf("[email]");
int j = s.indexOf("[/email]");
if(i != -1 && j != -1 && i < j)
{
String s2 = s.substring(i + 7, j);
String s3 = "<a href=\"mailto:" + s2 + "\">" + s2 + "</a>";
stringbuffer.replace(i, j + 8, s3);
}
return stringbuffer.toString();
}
public void setSource(String s)
{
source = s;
}
public String getResult()
{
return source;
}
public void run()
{
for(source = replaceNormalUBBCode(source); source.indexOf("[url]") != -1 && source.indexOf("[/url]") != -1;
? source = replaceURL(source));
for(; source.indexOf("[email]") != -1 && source.indexOf("[/email]") != -1; source = replaceEmail(source));
}
}
?