直接上代码：

/**
 *
 * <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;
  }
 }
}