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public static String filter(String value) {
if (value == null)
return (null);
StringBuffer result = new StringBuffer();
for (int i = 0; i < value.length(); i++) {
char ch = value.charAt(i);
if (ch == '<')
result.append("&lt;");
else if (ch == '>')
result.append("&gt;");
else if (ch == '&')
result.append("&amp;");
else if (ch == '"')
result.append("&quot;");
else if (ch == '\r')
result.append("<BR>");
else if (ch == '\n') {
if (i > 0 && value.charAt(i - 1) == '\r') {
} else {
result.append("<BR>");
}
} else if (ch == '\t')
result.append("&nbsp;&nbsp;&nbsp;&nbsp");
else if (ch == ' ')
result.append("&nbsp;");
else
result.append(ch);
}
return (result.toString());
}
2¡¢ÔÚactionÖÐÓÃreplaceAll()°Ñ¿Õ¸ñ»Ø³µÌæ»»³öÀ´£¬
replaceAll(“\r\n“,“<br>“);
replaceAll(“ “,“\b“);
ÔÚjspÒ³ÃæÖУ¬Èç¹ûÓÃ<bean:write>Ôò¼ÓÉÏfilter="false"£¬
<bean:write name="info" property="content" filter="false"/>
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td {
word-break:break-all;
    }


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http://www.artima.com/lejava/articles/equality.html
How to Write an Equality Method in Java
by Martin Odersky, Lex Spoon, and Bill Venners
June 1, 2009
Summary
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