判断字符串是中文或者英文

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 
 * <p>
 * ClassName ShowChineseInUnicodeBlock
 * </p>
 * <p>
 * Description 提供判断字符串是中文或者是英文的一种思路
 * </p>
 * 
 * @author wangxu wangx89@126.com
 *         <p>
 *         Date 2014-9-16 下午06:45:35
 *         </p>
 * @version V1.0
 * 
 */
public class ShowChineseInUnicodeBlock {
	public static void main(String[] args) {
		String str = "我爱你，！？（）：；“”、。";
		char[] charArray = str.toCharArray();
		for (int i = 0; i < charArray.length; i++) {
			isChinese(charArray[i]);
		}
		String chinese = "中国god damn";
		System.out.println(isContainChinese(chinese));
		String english = "dfafdabac";
		System.out.println(isEnglish(english));
	}

	/**
	 * 
	 * <p>
	 * Title: isChinese
	 * </p>
	 * <p>
	 * Description: 该函数就用来打印一些字符看看属于什么
	 * </p>
	 * 
	 * @param c
	 * 
	 */
	public static void isChinese(char c) {
		Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
		if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS) {
			System.out.println(c + "--CJK_UNIFIED_IDEOGRAPHS");
		} else if (ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS) {
			System.out.println(c + "--CJK_COMPATIBILITY_IDEOGRAPHS");
		} else if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A) {
			// CJK Unified Ideographs Extension WikipediaUnicode扩展汉字
			// CJK Unified Ideographs Extension A 中日韩统一表意文字扩展区A ; 表意文字扩充A
			// CJK Unified Ideographs Extension B 中日韩统一表意文字扩展区B
			System.out.println(c + "--CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A");
		} else if (ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {// 通用标点
			System.out.println(c + "--GENERAL_PUNCTUATION");

		} else if (ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION) {
			System.out.println(c + "--CJK_SYMBOLS_AND_PUNCTUATION");

		} else if (ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {
			System.out.println(c + "--HALFWIDTH_AND_FULLWIDTH_FORMS");

		}
	}

	public static boolean isEnglish(String charaString) {
		return charaString.matches("^[a-zA-Z]*");
	}

	public static boolean isContainChinese(String str) {// 检测是否包含中文
		String regEx = "[\\u4E00-\\u9FA5]+";
		Pattern p = Pattern.compile(regEx);
		Matcher m = p.matcher(str);
		if (m.find()) {
			return true;
		} else {
			return false;
		}
	}
}

判断字符串是中文或者英文

原文：http://blog.csdn.net/shijiebei2009/article/details/39321197