java 细节代码收集 供自己查看

1.获取匹配信息的方法
例: 获取字符串中 20XX 和 19XX 形式的数值

public static String findDate(String str){
		// str1.matches("[\\w\\W]*[19\\d{2}|20\\d{2}][\\w\\W]*");
		Pattern pt = Pattern.compile("19\\d{2}|20\\d{2}");
		Matcher m = pt.matcher(str);
		boolean found = m.find();
		if(found) return m.group();
		return "";
	}

2.IKanalyzer 中文分词的方法
下载IKAnalyzer3.2
下载lucene-3.0.3.jar

public static String splitChinese(String text) {
		String output = "";
		 Analyzer analyzer = new IKAnalyzer();  
	     TokenStream tokenStream = analyzer.tokenStream("", new StringReader(text));
	     TermAttribute termAtt = (TermAttribute) tokenStream.getAttribute(TermAttribute.class);   
	     try {
	    	 while (tokenStream.incrementToken()) {   
	    		 output += termAtt.term() + " ";   
	    	 }
	     } catch (IOException e) {
	    	 e.printStackTrace();
	     }   
		return output;
	}

3.中英文停用词库
下载附件(另附 导入数据库类)

4.struts1重定向的方法

ActionForward forward = new ActionForward(url);
			forward.setRedirect(true);
			return forward ;

注：url中若含有中文，需经过编码：URLEncoder.encode(url, "UTF-8")

5.获得时间

Calendar calendar = Calendar.getInstance();
Timestamp ts = new Timestamp(System.currentTimeMillis());
calendar.setTime(ts);