init: 导入项目

commonapi/src/main/java/com/ag/util/UUIDUtil.java

@@ -0,0 +1,133 @@
+package com.ag.util;
+
+import java.util.UUID;
+
+/**
+ * Created by Administrator on 2017/3/29 0029.
+ */
+public class UUIDUtil {
+    public UUIDUtil() {
+    }
+
+    /**
+     * ????UUID
+     *
+     * @return String UUID
+     */
+    public static String getUUID() {
+        return UUID.randomUUID().toString().replaceAll("-","");
+    }
+
+    /**
+     * ???????UUID
+     *
+     * @param number
+     *            int ?????UUID??
+     * @return String[] UUID??
+     */
+    public static String[] getUUID(int number) {
+        if (number < 1) {
+            return null;
+        }
+        String[] ss = new String[number];
+        for (int i = 0; i < number; i++) {
+            ss[i] = getUUID();
+        }
+        return ss;
+    }
+
+    /**
+     * ????????base64??
+     */
+    public static char[] encode(byte[] data) {
+        char[] out = new char[((data.length + 2) / 3) * 4];
+        for (int i = 0, index = 0; i < data.length; i += 3, index += 4) {
+            boolean quad = false;
+            boolean trip = false;
+            int val = (0xFF & (int) data[i]);
+            val <<= 8;
+            if ((i + 1) < data.length) {
+                val |= (0xFF & (int) data[i + 1]);
+                trip = true;
+            }
+            val <<= 8;
+            if ((i + 2) < data.length) {
+                val |= (0xFF & (int) data[i + 2]);
+                quad = true;
+            }
+            out[index + 3] = alphabet[(quad ? (val & 0x3F) : 64)];
+            val >>= 6;
+            out[index + 2] = alphabet[(trip ? (val & 0x3F) : 64)];
+            val >>= 6;
+            out[index + 1] = alphabet[val & 0x3F];
+            val >>= 6;
+            out[index + 0] = alphabet[val & 0x3F];
+        }
+        return out;
+    }
+    /**
+     * ?base64????????????
+     */
+    public static byte[] decode(char[] data) {
+        int len = ((data.length + 3) / 4) * 3;
+        if (data.length > 0 && data[data.length - 1] == '=')
+            --len;
+        if (data.length > 1 && data[data.length - 2] == '=')
+            --len;
+        byte[] out = new byte[len];
+        int shift = 0;
+        int accum = 0;
+        int index = 0;
+        for (int ix = 0; ix < data.length; ix++) {
+            int value = codes[data[ix] & 0xFF];
+            if (value >= 0) {
+                accum <<= 6;
+                shift += 6;
+                accum |= value;
+                if (shift >= 8) {
+                    shift -= 8;
+                    out[index++] = (byte) ((accum >> shift) & 0xff);
+                }
+            }
+        }
+        if (index != out.length)
+            throw new Error("miscalculated data length!");
+        return out;
+    }
+    static private char[] alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
+            .toCharArray();
+    static private byte[] codes = new byte[256];
+    static {
+        for (int i = 0; i < 256; i++)
+            codes[i] = -1;
+        for (int i = 'A'; i <= 'Z'; i++)
+            codes[i] = (byte) (i - 'A');
+        for (int i = 'a'; i <= 'z'; i++)
+            codes[i] = (byte) (26 + i - 'a');
+        for (int i = '0'; i <= '9'; i++)
+            codes[i] = (byte) (52 + i - '0');
+        codes['+'] = 62;
+        codes['/'] = 63;
+    }
+    public static void main(String[] args) throws Exception {
+        // ???base64
+        /*String strSrc = "ios";
+        String strOut = new String(UUIDUtil.encode(strSrc.getBytes("UTF-8")));
+        System.out.println(strOut);
+        String strOut2 = new String(UUIDUtil.decode(strOut.toCharArray()),
+                "UTF-8");
+        System.out.println(strOut2);*/
+        long on = System.nanoTime();
+        long on1 = System.currentTimeMillis();
+        System.out.println(UUIDUtil.getUUID());
+        long end = System.nanoTime();
+        long end1 = System.currentTimeMillis();
+
+
+        System.out.println(end - on);
+        System.out.println(end1 - on1);
+
+    }
+
+}
+