Java中字符串的替换(转).docx

最近在网上搜集了一些java中字符串替换的方法。? 1. /**? * 字符串替换函数? * @param from 要替换的字符? * @param to 要替换成的目标字符? * @param source 要替换的字符串? * @return 替换后的字符串? */? import java.util.StringTokenizer;? public String str_replace(String from,Stringto,String source) {??? StringBuffer bf= new StringBuffer();??? StringTokenizerst = new StringTokenizer(source,from,true);??? while (st.hasMoreTokens()) {????? String tmp = st.nextToken();????? if(tmp.equals(from)) {??????? bf.append(to);????? } else {??????? bf.append(tmp);????? }??? }??? return bf.toString();? }2. /*?*字符串替换函数,另一种方法的实现?*/? public String str_replace2(String con ,String tag,String rep){??? int j=0;??? inti=0;??? int k=0;??? String RETU=;??? String temp =con;??? inttagc =tag.length();??? while(icon.length()){????? if(con.substring(i).startsWith(tag)){??????? temp =con.substring(j,i)+rep;??????? RETU+= temp;??????? i+=tagc;??????? j=i;????? }else{??????? i+=1;????? }??? }??? RETU +=con.substring(j);??? return RETU;? }??3.? public static String replace(String strSource, String strFrom, String strTo) {??? if(strFrom == null || strFrom.equals())????? return strSource;??? String strDest = ;??? intintFromLen = strFrom.length();??? intintPos;??? while((intPos = strSource.indexOf(strFrom)) != -1) {????? strDest = strDest + strSource.substring(0,intPos);????? strDest = strDest + strTo;????? strSource = strSource.substring(intPos + intFromLen);??? }??? strDest = strDest + strSource;????? return strDest;? }4.高效替换程序。? public static String replace(String strSource, String strFrom, String strTo) {??????? if (strSource == null) {????????????? return null;??????? }????? inti = 0;??? if ((i = strSource.indexOf(strFrom, i)) = 0) {????? char[] cSrc = strSource.toCharArray();????? char[] cTo = strTo.toCharArray();????? intlen = strFrom.length();??????? StringBufferbuf = new StringBuffer(cSrc.length);??????? buf.append(cSrc, 0, i).append(cTo);????? i += len;????????? int j = i;???????????? while ((i = strSource.indexOf(strFrom,