format code

src/main/java/com/wuban/signDemo/SignAndSubmit.java

 package com.wuban.signDemo;
 
+import com.wuban.util.CustomizeHttpService;
 import org.web3j.crypto.*;
 import org.web3j.protocol.Web3j;
 import org.web3j.protocol.core.DefaultBlockParameterName;

src/main/java/com/wuban/signDemo/CustomizeHttpService.java → src/main/java/com/wuban/util/CustomizeHttpService.java

-package com.wuban.signDemo;
+package com.wuban.util;
 
 import okhttp3.*;
 import okhttp3.logging.HttpLoggingInterceptor;

src/main/java/com/wuban/signDemo/SSLSocketClient.java → src/main/java/com/wuban/util/SSLSocketClient.java

-package com.wuban.signDemo;
+package com.wuban.util;
 
 import javax.net.ssl.*;
 import java.security.SecureRandom;