java正则 范例

java正则 实例

java的正则很强大，谁用谁知道

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用到最多的还是ismatch,看看是否符合正则

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还可以用它替代字符串，过滤非法字符，截取字符串，分割字符串

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替代字符串：

替代回车符号

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Pattern ilSingle = Pattern.compile("\r|\n");String message = "xxxxxx";message = ilSingle.matcher(message).replaceAll("");

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截取字符串： expected:xxxxxx but was:xxxxxxx

                                Pattern p = Pattern.compile("(expected:)(.*?)(but was:)(.*)");Matcher m = p.matcher(message);PigErrorBean bean = new PigErrorBean();if(m.find()){bean.setExpect(m.group(2));bean.setOutput(m.group(4));}return bean;

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分割字符串：

? ?(1,2,3),(6,5,4),(95,54,23),(44,53,54,12,43),(1,2),(2)

                                List<List<Object>> paramList = new LinkedList<List<Object>>();Pattern pattern = Pattern.compile("(\\()(.*?)(\\))");Matcher matcher = pattern.matcher(params);boolean hasMatcher = false;while (matcher.find()) {hasMatcher = true;List<Object> list = new LinkedList<Object>();String strList = matcher.group(2);StringTokenizer st = new StringTokenizer(strList,",");while (st.hasMoreElements()) {Object param = st.nextElement();list.add(param);}paramList.add(list);}

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