编程：空格替换Java

import java.util.*;public class Replacement {public String replaceSpace(String iniString, int length) {    if (iniString == null || length <= 0) {        return null;    }    //========================================    iniString=iniString.replaceAll(" ", "%20");      return iniString;  //============================================    StringBuilder strTemp = new StringBuilder();                           for (int i = 0; i < length; i++) {                                    char c = iniString.charAt(i);           if(c == ' '){                      strTemp.append("%20");            }else{              strTemp.append(c);        }                                                          }                                                                 return strTemp.toString();  }}