java判断字符串是否含有中文

http://www.micmiu.com/lang/java/java-check-chinese/

package com.adm.util;

import java.util.regex.Pattern;

/**
* 字符通用工具类
*
* @author <a href="http://www.micmiu.com">Michael Sun</a>
*/
public class CharUtil {

/**
* @param args
*/
public static void main(String[] args) {
String[] strArr = new String[] { "www.micmiu.com",
"!@#$%^&*()_+{}[]|\"'?/:;<>,.", "！￥……（）——：；“”‘’《》，。？、", "不要啊",
"やめて", "韩佳人", "한가인" };
for (String str : strArr) {
System.out.println("===========> 测试字符串：" + str);
System.out.println("正则判断：" + isChineseByREG(str) + " -- "
+ isChineseByName(str));
System.out.println("Unicode判断结果 ：" + isChinese(str));
System.out.println("详细判断列表：");
char[] ch = str.toCharArray();
for (int i = 0; i < ch.length; i++) {
char c = ch[i];
System.out.println(c + " --> " + (isChinese(c) ? "是" : "否"));
}
}

}

// 根据Unicode编码完美的判断中文汉字和符号
private static boolean isChinese(char c) {
Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
|| ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
|| ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
|| ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
|| ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
|| ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
|| ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
return true;
}
return false;
}

// 完整的判断中文汉字和符号
public static boolean isChinese(String strName) {
char[] ch = strName.toCharArray();
for (int i = 0; i < ch.length; i++) {
char c = ch[i];
if (isChinese(c)) {
return true;
}
}
return false;
}

// 只能判断部分CJK字符（CJK统一汉字）
public static boolean isChineseByREG(String str) {
if (str == null) {
return false;
}
Pattern pattern = Pattern.compile("[\\u4E00-\\u9FBF]+");
return pattern.matcher(str.trim()).find();
}

// 只能判断部分CJK字符（CJK统一汉字）
public static boolean isChineseByName(String str) {
if (str == null) {
return false;
}
// 大小写不同：\\p 表示包含，\\P 表示不包含
// \\p{Cn} 的意思为 Unicode 中未被定义字符的编码，\\P{Cn} 就表示 Unicode中已经被定义字符的编码
String reg = "\\p{InCJK Unified Ideographs}&&\\P{Cn}";
Pattern pattern = Pattern.compile(reg);
return pattern.matcher(str.trim()).find();
}
}