修复埋点数据中中文乱码问题

samples/skywalking-auth/src/main/resources/sky-walking.auth

@@ -4,6 +4,8 @@ skywalking.user_id=123
 skywalking.application_code=test
 #skywalking auth的环境变量名字
 skywalking.auth_system_env_name=SKYWALKING_RUN
+#skywalking数据编码
+skywalking.charset=UTF-8
 
 #是否打印数据
 buriedpoint.printf=false

skywalking-api/src/main/java/com/ai/cloud/skywalking/conf/Config.java

@@ -10,6 +10,8 @@ public class Config {
 		public static String AUTH_SYSTEM_ENV_NAME = "SKYWALKING_RUN";
 		
 		public static boolean AUTH_OVERRIDE = false;
+
+		public static String CHARSET = "UTF-8";
 	}
 
 	public static class BuriedPoint {

skywalking-api/src/main/java/com/ai/cloud/skywalking/sender/protocol/ProtocolBuilder.java

@@ -1,12 +1,16 @@
 package com.ai.cloud.skywalking.sender.protocol;
 
+import com.ai.cloud.skywalking.conf.Config;
+
+import java.nio.charset.Charset;
+
 public class ProtocolBuilder {
 
     //协议格式:
     // xx xx xx xx | xx xx xx xx xxx xxx xxx
     //   header(4) |        content
     public static byte[] builder(String data) {
-        byte[] content = data.getBytes();
+        byte[] content = data.getBytes(Charset.forName(Config.SkyWalking.CHARSET));
         byte[] header = intToByteArray(content.length);
         byte[] des = new byte[header.length + content.length];
         System.arraycopy(header, 0, des, 0, header.length);