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package string;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class IsAllChinese {

public static void main(String[] args) {

String value = removeRedundantLineTag("123\n4\n\n56\n\n");

System.out.println("value:" + value + ":");

}

static boolean nameIsChinese(String name) {

boolean isAllCh = true;

String[] as = name.split("");

for (int i = 0; i < as.length; i++) {

boolean isNum = as[i].matches("[[0-9]|[a-z]|[A-Z]]+");

if (isNum == true) {

isAllCh = false;

System.out.println(i);

break;

}

}

// boolean isNum = name.matches("[[0-9]|[a-z]|[A-Z]]+");

// +表示1个或多个（如"3"或"225"），*表示0个或多个（[0-9]*）（如""或"1"或"22"），?表示0个或1个([0-9]?)(如""或"7")

// System.out.println(isNum);

return isAllCh;

}

/**

* 去除多余的换行符 1.文本前后的换行符都去掉 2.当文本中的换行符有连续大于2个，就只保留2个

*/

static String removeRedundantLineTag(String origin) {

if (origin == null) {

return null;

}

origin = origin.trim();

//中间内容部分，两个以上的换行都替换成2个

Pattern pattern = Pattern.compile("[\\n]{2,}");

Matcher matcher = pattern.matcher(origin);

return matcher.replaceAll("\n\n");

}

}