Replace strings
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KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
*/
import java.security.SecureRandom;
import java.util.Properties;
import java.util.Random;
public class StringUtils
{
/**
* Replaces the relevant entities inside the String.
* All & >, <, and " are replaced by their
* respective names.
*
* @since 1.6.1
* @param src The source string.
* @return The encoded string.
*/
public static String replaceEntities( String src )
{
src = replaceString( src, "&", "&" );
src = replaceString( src, "<", "<" );
src = replaceString( src, ">", ">" );
src = replaceString( src, "\"", """ );
return src;
}
/**
* Replaces a string with an other string.
*
* @param orig Original string. Null is safe.
* @param src The string to find.
* @param dest The string to replace <I>src</I> with.
* @return A string with the replacement done.
*/
public static final String replaceString( String orig, String src, String dest )
{
if ( orig == null ) return null;
if ( src == null || dest == null ) throw new NullPointerException();
if ( src.length() == 0 ) return orig;
StringBuffer res = new StringBuffer(orig.length()+20); // Pure guesswork
int start = 0;
int end = 0;
int last = 0;
while ( (start = orig.indexOf(src,end)) != -1 )
{
res.append( orig.substring( last, start ) );
res.append( dest );
end = start+src.length();
last = start+src.length();
}
res.append( orig.substring( end ) );
return res.toString();
}
/**
* Replaces a part of a string with a new String.
*
* @param start Where in the original string the replacing should start.
* @param end Where the replacing should end.
* @param orig Original string. Null is safe.
* @param text The new text to insert into the string.
* @return The string with the orig replaced with text.
*/
public static String replaceString( String orig, int start, int end, String text )
{
if( orig == null ) return null;
StringBuffer buf = new StringBuffer(orig);
buf.replace( start, end, text );
return buf.toString();
}
/**
* Replaces a string with an other string. Case insensitive matching is used
*
* @param orig Original string. Null is safe.
* @param src The string to find.
* @param dest The string to replace <I>src</I> with.
* @return A string with all instances of src replaced with dest.
*/
public static String replaceStringCaseUnsensitive( String orig, String src, String dest )
{
if( orig == null ) return null;
StringBuffer res = new StringBuffer();
int start = 0;
int end = 0;
int last = 0;
String origCaseUnsn = orig.toLowerCase();
String srcCaseUnsn = src.toLowerCase();
while( (start = origCaseUnsn.indexOf(srcCaseUnsn, end)) != -1 )
{
res.append( orig.substring( last, start ) );
res.append( dest );
end = start+src.length();
last = start+src.length();
}
res.append( orig.substring( end ) );
return res.toString();
}
}
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