use common methods to simplify code

Author: paoerpaul

framework/src/main/java/org/tron/core/services/http/GetAssetIssueByAccountServlet.java

@@ -35,13 +35,10 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response) {
 
   protected void doPost(HttpServletRequest request, HttpServletResponse response) {
     try {
-      String account = request.getReader().lines()
-          .collect(Collectors.joining(System.lineSeparator()));
-      Util.checkBodySize(account);
-      boolean visible = Util.getVisiblePost(account);
+      PostParams params = PostParams.getPostParams(request);
       Account.Builder build = Account.newBuilder();
-      JsonFormat.merge(account, build, visible);
-      fillResponse(visible, build.getAddress(), response);
+      JsonFormat.merge(params.getParams(), build, params.isVisible());
+      fillResponse(params.isVisible(), build.getAddress(), response);
     } catch (Exception e) {
       Util.processError(e, response);
     }

framework/src/main/java/org/tron/core/services/http/GetAssetIssueByIdServlet.java

@@ -35,15 +35,12 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response) {
 
   protected void doPost(HttpServletRequest request, HttpServletResponse response) {
     try {
-      String input = request.getReader().lines()
-          .collect(Collectors.joining(System.lineSeparator()));
-      Util.checkBodySize(input);
-      boolean visible = Util.getVisiblePost(input);
-      JSONObject jsonObject = JSONObject.parseObject(input);
+      PostParams params = PostParams.getPostParams(request);
+      JSONObject jsonObject = JSONObject.parseObject(params.getParams());
       String id = jsonObject.getString("value");
       AssetIssueContract reply = wallet.getAssetIssueById(id);
       if (reply != null) {
-        response.getWriter().println(JsonFormat.printToString(reply, visible));
+        response.getWriter().println(JsonFormat.printToString(reply, params.isVisible()));
       } else {
         response.getWriter().println("{}");
       }

framework/src/main/java/org/tron/core/services/http/GetAssetIssueListByNameServlet.java

@@ -34,13 +34,10 @@ protected void doGet(HttpServletRequest request, HttpServletResponse response) {
 
   protected void doPost(HttpServletRequest request, HttpServletResponse response) {
     try {
-      String input = request.getReader().lines()
-          .collect(Collectors.joining(System.lineSeparator()));
-      Util.checkBodySize(input);
-      boolean visible = Util.getVisiblePost(input);
-      JSONObject jsonObject = JSON.parseObject(input);
+      PostParams params = PostParams.getPostParams(request);
+      JSONObject jsonObject = JSON.parseObject(params.getParams());
       String value = jsonObject.getString("value");
-      fillResponse(visible, value, response);
+      fillResponse(params.isVisible(), value, response);
     } catch (Exception e) {
       Util.processError(e, response);
     }

framework/src/test/java/stest/tron/wallet/dailybuild/tvmnewcommand/validatemultisign/TestValidatemultisign001.java

@@ -22,7 +22,6 @@
 import org.tron.common.utils.ByteUtil;
 import org.tron.common.utils.StringUtil;
 import org.tron.common.utils.Utils;
-import org.tron.common.utils.WalletUtil;
 import org.tron.core.Wallet;
 import org.tron.protos.Protocol;
 import org.tron.protos.Protocol.Transaction;

framework/src/test/java/stest/tron/wallet/dailybuild/tvmnewcommand/validatemultisign/TestValidatemultisign002.java

@@ -22,7 +22,6 @@
 import org.tron.common.utils.ByteUtil;
 import org.tron.common.utils.StringUtil;
 import org.tron.common.utils.Utils;
-import org.tron.common.utils.WalletUtil;
 import org.tron.core.Wallet;
 import org.tron.protos.Protocol;
 import org.tron.protos.Protocol.Transaction;

framework/src/test/java/stest/tron/wallet/dailybuild/tvmnewcommand/validatemultisign/TestValidatemultisign003.java

@@ -22,8 +22,6 @@
 import org.tron.common.utils.Sha256Hash;
 import org.tron.common.utils.StringUtil;
 import org.tron.common.utils.Utils;
-import org.tron.common.utils.WalletUtil;
-import org.tron.core.Wallet;
 import org.tron.protos.Protocol;
 import org.tron.protos.Protocol.Transaction;
 import org.tron.protos.Protocol.TransactionInfo;
@@ -168,8 +166,7 @@ public void test002validatemultisign() {
     Transaction transaction = PublicMethedForMutiSign.sendcoinGetTransaction(
         fromAddress, 1L, ownerAddress, ownerKey, blockingStubFull, ownerKeyString);
     byte[] hash = Sha256Hash.of(CommonParameter.getInstance()
-        .isECKeyCryptoEngine(),transaction.getRawData().toByteArray()).getBytes();
-
+        .isECKeyCryptoEngine(), transaction.getRawData().toByteArray()).getBytes();
 
     byte[] merged = ByteUtil.merge(ownerAddress, ByteArray.fromInt(0), hash);
     byte[] tosign = Sha256Hash.hash(CommonParameter.getInstance()