Verification methods for special characters and Chinese in Java
这篇文章主要为大家详细介绍了java中文及特殊字符的校验方法,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
本文实例为大家分享了Android九宫格图片展示的具体代码,供大家参考,具体内容如下
参考链接:Character.UnicodeBlock中cjk的说明详解
1.关于Character.UnicodeBlock的介绍
CJK的意思是“Chinese,Japanese,Korea”的简写 ,实际上就是指中日韩三国的象形文字的Unicode编码
Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS : 4E00-9FBF:Unicode 编码为 U+4E00~U+9FFF 的 CJK 统一文字
Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS :F900-FAFF:CJK 兼容象形文字
Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A :3400-4DBF:CJK 统一表意符号扩展 A
Character.UnicodeBlock.GENERAL_PUNCTUATION :2000-206F:常用标点
Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION :3000-303F:CJK 符号和标点
Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS :FF00-FFEF:半角及全角形式
2.封装
/** * 校验一个字符是否是汉字 * * @param c * 被校验的字符 * @return true代表是汉字 */ public static boolean isChineseChar(char c) { try { return String.valueOf(c).getBytes("UTF-8").length > 1; } catch (UnsupportedEncodingException e) { e.printStackTrace(); return false; } } /** * 验证字符串内容是否包含下列非法字符<br> * `~!#%^&*=+\\|{};:'\",<>/?○●★☆☉♀♂※¤╬の〆 * * @param content * 字符串内容 * @return 't'代表不包含非法字符,otherwise代表包含非法字符。 */ public static char validateLegalString(String content) { String illegal = "`~!#%^&*=+\\|{};:'\",<>/?○●★☆☉♀♂※¤╬の〆"; char isLegalChar = 't'; L1: for (int i = 0; i < content.length(); i++) { for (int j = 0; j < illegal.length(); j++) { if (content.charAt(i) == illegal.charAt(j)) { isLegalChar = content.charAt(i); break L1; } } } return isLegalChar; } /** * 验证是否是汉字或者0-9、a-z、A-Z * * @param c * 被验证的char * @return true代表符合条件 */ public static boolean isRightChar(char c) { return isChinese(c) || isWord(c); } /** * 校验某个字符是否是a-z、A-Z、_、0-9 * * @param c * 被校验的字符 * @return true代表符合条件 */ public static boolean isWord(char c) { String regEx = "[\\w]"; Pattern p = Pattern.compile(regEx); Matcher m = p.matcher("" + c); return m.matches(); } /** * 判定输入的是否是汉字 * * @param c * 被校验的字符 * @return true代表是汉字 */ public 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.GENERAL_PUNCTUATION || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) { return true; } return false; } /** * 校验String是否全是中文 * * @param name * 被校验的字符串 * @return true代表全是汉字 */ public static boolean checkNameChese(String name) { boolean res = true; char[] cTemp = name.toCharArray(); for (int i = 0; i < name.length(); i++) { if (!isChinese(cTemp[i])) { res = false; break; } } return res; }
3.java 判断字符串中是否包含中文并过滤掉中文,请移步文章:java 判断字符串中是否包含中文并过滤掉中文
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