java去掉文本中多余的空格与空行实例代码

/**
* 移除多余空行和空格
*/
publicstaticString dealRedundantSpaceAndBlankLine(String content)
{
 if(content ==null|| content.length() ==0)
 {
  return"";
 }
 StringBuilder strAfterRemoveCRSB =newStringBuilder();
 for(inti =0; i < content.length(); i++)
 {
  if(content.charAt(i) !='r')
   strAfterRemoveCRSB.append(content.charAt(i));
 }
 String strAfterRemoveCR = strAfterRemoveCRSB.toString();
 if(strAfterRemoveCR ==null|| strAfterRemoveCR.length() ==0)
 {
  return"";
 }
 StringBuilder resultSB =newStringBuilder();
 String[] lines = strAfterRemoveCR.split("n");
 intblankCount =0;
 for(String line : lines)
 {
  if(line ==null)
  {
   continue;
  }
  String lineTrim = line.trim();
  if("".equals(lineTrim))
  {
   blankCount++;
   if(blankCount <=2) {
    resultSB.append("n");
   }
  }else{
   blankCount =0;
   resultSB.append(dealSpace4OneLine(line)).append("n");
  }
 }
 resultSB.deleteCharAt(resultSB.length() -1);
 returnresultSB.toString();
}
 
/**
* 移除1行中的多余空格
*/
publicstaticString dealSpace4OneLine(String line)
{
 if(line ==null||"".equals(line)) {
  return"";
 }
 intspaceCount =0;
 StringBuilder sb =newStringBuilder();
 for(inti =0; i < line.length(); i++) {
  charcurChar = line.charAt(i);
  if(curChar ==' ')
  {
   spaceCount++;
   if(spaceCount <=5) {
    sb.append(' ');
   }
  }else{
   spaceCount =0;
   sb.append(curChar);
  }
 }
 returnsb.toString();
}
 
publicstaticvoidmain(String[] args) {
 String str ="呵呵  测试nnnn   n rn将风控打扫房  间nnnn n n  快递费解封时代峰峻nrn 发的几点睡 ";
 String result = dealRedundantSpaceAndBlankLine(str);
 System.out.println(result);
}