public static String replaceStringNew(String line, String oldstr, String newstr) {
StringBuffer sb = null;
int oldLen = oldstr.length();
if (oldLen == 0) {
return line;
}
if (oldLen == newstr.length()) {
if (oldstr.equals(newstr)) {
return line;
}
sb = new StringBuffer(line);
int prevIdx = 0;
while ((prevIdx = line.indexOf(oldstr, prevIdx)) >= 0) {
sb.replace(prevIdx, prevIdx + oldLen, newstr);
prevIdx += oldLen;
}
} else {
int lineLen = line.length();
sb = new StringBuffer(lineLen);
int oldIdx = 0;
int thisIdx;
while ((thisIdx = line.indexOf(oldstr, oldIdx)) >= 0) {
for (int ix = oldIdx; ix < thisIdx; ix++) {
sb.append(line.charAt(ix));
}
sb.append(newstr);
oldIdx = thisIdx + oldLen;
}
for (int ix = oldIdx; ix < lineLen; ix++) {
sb.append(line.charAt(ix));
}
}
return sb.toString();
}
public static String replaceStringOld(String line, String oldstr, String newstr) {
if (oldstr.compareTo(newstr) == 0) {
return line;
}
StringBuffer sb = null;
if (oldstr.length() == newstr.length()) {
sb = new StringBuffer(line);
int lastIdx = line.indexOf(oldstr);
if (lastIdx >= 0) {
do {
sb.replace(lastIdx, lastIdx + newstr.length(), newstr);
} while ((lastIdx = line.indexOf(oldstr, lastIdx + 1)) >= 0);
}
} else {
sb = new StringBuffer();
int oldStrIdx = 0;
int lastIdx = line.indexOf(oldstr);
if (lastIdx >= 0) {
do {
for (int ix = oldStrIdx; ix < lastIdx; ix++) {
sb.append(line.charAt(ix));
}
sb.append(newstr);
oldStrIdx = lastIdx + oldstr.length();
} while ((lastIdx = line.indexOf(oldstr, lastIdx + 1)) >= 0);
}
for (int ix = oldStrIdx; ix < line.length(); ix++) {
sb.append(line.charAt(ix));
}
}
return sb.toString();
}
public static String replaceString1(String line, String oldstr, String newstr) {
int oldLen = oldstr.length();
int newLen = newstr.length();
if (oldLen == 0 || oldstr.equals(newstr)) {
return line;
}
StringBuffer sb = new StringBuffer(line);
int bufIdx = 0;
int oldIdx = 0;
int thisIdx;
while ((thisIdx = line.indexOf(oldstr, oldIdx)) >= 0) {
bufIdx += (thisIdx - oldIdx);
sb.replace(bufIdx, bufIdx + oldLen, newstr);
bufIdx += newLen;
oldIdx = thisIdx + oldLen;
}
return sb.toString();
}
