replace ‘\n’ with lineSeparator (#3058)

replace \n to System.lineSeparator

Author: kexianjun

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/command/impl/Ls.java

@@ -44,7 +44,7 @@ public String execute(CommandContext commandContext, String[] args) {
 
     public String listProvider() {
         StringBuilder stringBuilder = new StringBuilder();
-        stringBuilder.append("As Provider side:\n");
+        stringBuilder.append("As Provider side:" + System.lineSeparator());
         Collection<ProviderModel> ProviderModelList = ApplicationModel.allProviderModels();
 
         TTable tTable = new TTable(new TTable.ColumnDefine[]{
@@ -66,7 +66,7 @@ public String listProvider() {
 
     public String listConsumer() {
         StringBuilder stringBuilder = new StringBuilder();
-        stringBuilder.append("As Consumer side:\n");
+        stringBuilder.append("As Consumer side:" + System.lineSeparator());
         Collection<ConsumerModel> consumerModelList = ApplicationModel.allConsumerModels();
 
         TTable tTable = new TTable(new TTable.ColumnDefine[]{

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/DubboLogo.java

@@ -18,8 +18,8 @@
 
 public class DubboLogo {
     public static final String dubbo =
-                    "   ___   __  __ ___   ___   ____     \n" +
-                    "  / _ \\ / / / // _ ) / _ ) / __ \\  \n" +
-                    " / // // /_/ // _  |/ _  |/ /_/ /    \n" +
-                    "/____/ \\____//____//____/ \\____/   \n";
+                    "   ___   __  __ ___   ___   ____     " + System.lineSeparator() +
+                    "  / _ \\ / / / // _ ) / _ ) / __ \\  " + System.lineSeparator() +
+                    " / // // /_/ // _  |/ _  |/ /_/ /    " + System.lineSeparator() +
+                    "/____/ \\____//____//____/ \\____/   " + System.lineSeparator();
 }

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TKv.java

@@ -71,7 +71,7 @@ private String filterEmptyLine(String content) {
                         line = " ";
                     }
                 }
-                sb.append(line).append('\n');
+                sb.append(line).append(System.lineSeparator());
             }
         } finally {
             if (null != scanner) {

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TLadder.java

@@ -48,7 +48,7 @@ public String rendering() {
             if (deep == 0) {
                 ladderSB
                         .append(item)
-                        .append("\n");
+                        .append(System.lineSeparator());
             }
 
             // need separator for others
@@ -57,7 +57,7 @@ public String rendering() {
                         .append(repeat(STEP_CHAR, deep * INDENT_STEP))
                         .append(LADDER_CHAR)
                         .append(item)
-                        .append("\n");
+                        .append(System.lineSeparator());
             }
 
             deep++;

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTable.java

@@ -76,13 +76,13 @@ public String rendering() {
             // print first separation line
             if (isFirstRow
                     && border.has(Border.BORDER_OUTER_TOP)) {
-                tableSB.append(drawSeparationLine(widthCacheArray)).append("\n");
+                tableSB.append(drawSeparationLine(widthCacheArray)).append(System.lineSeparator());
             }
 
             // print inner separation lines
             if (!isFirstRow
                     && border.has(Border.BORDER_INNER_H)) {
-                tableSB.append(drawSeparationLine(widthCacheArray)).append("\n");
+                tableSB.append(drawSeparationLine(widthCacheArray)).append(System.lineSeparator());
             }
 
             // draw one line
@@ -92,7 +92,7 @@ public String rendering() {
             // print ending separation line
             if (isLastRow
                     && border.has(Border.BORDER_OUTER_BOTTOM)) {
-                tableSB.append(drawSeparationLine(widthCacheArray)).append("\n");
+                tableSB.append(drawSeparationLine(widthCacheArray)).append(System.lineSeparator());
             }
 
         }
@@ -157,7 +157,7 @@ private String drawRow(int[] widthCacheArray, int rowIndex) {
                         if (border.has(Border.BORDER_OUTER_RIGHT)) {
                             segmentSB.append("|");
                         }
-                        segmentSB.append("\n");
+                        segmentSB.append(System.lineSeparator());
                     }
 
                 }

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTree.java

@@ -92,7 +92,7 @@ public void callback(int deep, boolean isLast, String prefix, Node node) {
                                     .append(hasChild ? "|" : EMPTY)
                                     .append(repeat(' ', costPrefixLength))
                                     .append(scanner.nextLine())
-                                    .append("\n");
+                                    .append(System.lineSeparator());
                         }
                     }
                 } finally {