java去掉文本中多余的空格与空行实例代码

java;"> /** * 移除多余空行和空格 */ public static String dealRedundantSpaceAndBlankLine(String content) {  if (content == null || content.length() == 0)  {   return "";  }  StringBuilder strAfterRemoveCRSB = new StringBuilder();  for (int i = 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 = new StringBuilder();  String[] lines = strAfterRemoveCR.split("/n");  int blankCount = 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);  return resultSB.toString(); } /** * 移除1行中的多余空格 */ public static String dealSpace4OneLine(String line) {  if (line == null || "".equals(line)) {   return "";  }  int spaceCount = 0;  StringBuilder sb = new StringBuilder();  for (int i = 0; i < line.length(); i++) {   char curChar = line.charAt(i);   if (curChar == ' ')   {    spaceCount++;    if (spaceCount <= 5) {     sb.append(' ');    }   } else {    spaceCount = 0;    sb.append(curChar);   }  }  return sb.toString(); } public static void main(String[] args) {  String str = "呵呵  测试/n/n/n/n   /n /r/n将风控打扫房  间/n/n/n/n /n /n  快递费解封时代峰峻/n/r/n 发的几点睡 ";  String result = dealRedundantSpaceAndBlankLine(str);  System.out.println(result); }