icejoywoo · August 23, 2018 04:43 · Aug 23, 2018
diff --git a/CharUtil.java b/CharUtil.java
@@ -0,0 +1,78 @@
+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",
+            "!@#$%^&amp;*()_+{}[]|\"'?/:;<>,.",
+            "！￥……（）——：；“”‘’《》，。？、",
+            "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 (char c : ch) {
+                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);
+        return 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;
+    }
+
+    // 完整的判断中文汉字和符号
+    public static boolean isChinese(String strName) {
+        char[] ch = strName.toCharArray();
+        for (char c : ch) {
+            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();
+    }
+}