海亮定制

孙向锦
1 parent 91dbce60
Showing 1 changed file with 26 additions and 15 deletions
海亮定制.md
@@ -836,23 +836,34 @@ public static String bytesToHexString(byte[] src) {
  
 ```java
  
- System.out.println(bytesToHexString("李四".getBytes("GB2312")));
- 
- public static String bytesToHexString(byte[] src) {
-	StringBuilder stringBuilder = new StringBuilder("");
-	if (src == null || src.length <= 0) {
-		return "";
-	}
-	for (int i = 0; i < src.length; i++) {
-		int v = src[i] & 0xFF;
-		String hv = Integer.toHexString(v);
-		if (hv.length() < 2) {
-			stringBuilder.append(0);
+System.out.println(new String(hex2Bytes(bytesToHexString("李四".getBytes("GB2312"))),"GB2312"));
+
+public static String bytesToHexString(byte[] src) {
+    StringBuilder stringBuilder = new StringBuilder("");
+    if (src == null || src.length <= 0) {
+        return "";
+    }
+    for (int i = 0; i < src.length; i++) {
+        int v = src[i] & 0xFF;
+        String hv = Integer.toHexString(v);
+        if (hv.length() < 2) {
+            stringBuilder.append(0);
+        }
+        stringBuilder.append(hv);
+        stringBuilder.append("");
+    }
+    return stringBuilder.toString();
+}
+
+ public static byte[] hex2Bytes(String hex){
+	if(hex.length() % 2 == 0){
+		byte[] ret = new byte[hex.length() / 2];
+		for(int i = 0 ; i< hex.length() / 2 ; i++){
+			ret[i] = (byte)Integer.parseInt(hex.substring(2*i,2*i+2),16);
 		}
-		stringBuilder.append(hv);
-		stringBuilder.append("");
+		return ret;
 	}
-	return stringBuilder.toString();
+	return null;
 }
 ```