本文介绍Java中一个实用的字符串替换函数。

示例代码：
public String replace( String line, String oldString, String newString )
{
int i=0;
if ( ( i=line.indexOf( oldString, i ) ) >= 0 ) {
char [] line2 = line.toCharArray();
char [] newString2 = newString.toCharArray();
int oLength = oldString.length();
StringBuffer buf = new StringBuffer(line2.length);
buf.append(line2, 0, i).append(newString2);
i += oLength;
int j = i;
while( ( i=line.indexOf( oldString, i ) ) > 0 ) {
buf.append(line2, j, i-j).append(newString2);
i += oLength;
j = i;
}
buf.append(line2, j, line2.length - j);
return buf.toString();
}
return line;
}