去掉字符串空格

1.空格在字符串开始和结尾，直接使用String.trim()函数即可。

2.空格在字符串中间，二种方法： 

（1）使用String.replaceAll(" ","");

（2）使用StringTokenizer

String string = "df wf Ss  asSSf sfsd aSa";StringTokenizer mStringTokenizer = new StringTokenizer(string," ");//或者StringTokenizer mStringTokenizer = new StringTokenizer(string);StringBuffer stringBuffer = new StringBuffer();int i = 1;while (mStringTokenizer.hasMoreElements()) {++i;stringBuffer.append(mStringTokenizer.nextToken());}System.out.println("mStringTokenizer==" + stringBuffer.toString());