字符串工具

src/main/java/com/xwolf/boot/utils/StringUtils.java

@@ -0,0 +1,36 @@
+package com.xwolf.boot.utils;
+
+/**
+ * 字符串工具
+ * @author xwolf
+ * @version 1.0
+ * @since 1.8
+ */
+public class StringUtils {
+
+    /**
+     * 是否为空字符串
+     * @param str
+     * @return
+     */
+    public static boolean isBlank(String str){
+        int strLen;
+        if (str == null || (strLen = str.length()) == 0) {
+            return true;
+        }
+        for (int i = 0; i < strLen; i++) {
+            if (Character.isWhitespace(str.charAt(i)) == false) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static boolean isNotBlank(String str){
+        return !isBlank(str);
+    }
+
+    public static void main(String[] args) {
+        System.out.println(isBlank("    "));
+    }
+}