fix

Author: Picazsoo

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java

@@ -31,7 +31,6 @@
 import org.apache.commons.io.IOCase;
 import org.apache.commons.lang3.ObjectUtils;
 import org.apache.commons.lang3.StringUtils;
-import org.apache.commons.lang3.Strings;
 import org.openapitools.codegen.api.*;
 import org.openapitools.codegen.config.GlobalSettings;
 import org.openapitools.codegen.ignore.CodegenIgnoreProcessor;
@@ -61,6 +60,7 @@
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
+import static org.apache.commons.lang3.StringUtils.removeStart;
 import static org.openapitools.codegen.CodegenConstants.X_INTERNAL;
 import static org.openapitools.codegen.utils.OnceLogger.once;
 
@@ -1392,7 +1392,7 @@ private void processUserDefinedTemplates() {
                             // hack: destination filename in this scenario might be a suffix like Impl.java
                             templateExt = userDefinedTemplate.getDestinationFilename();
                         } else {
-                            templateExt = Strings.CS.prependIfMissing(templateExt, ".");
+                            templateExt = StringUtils.prependIfMissing(templateExt, ".");
                         }
                         String templateOutputFolder = userDefinedTemplate.getFolder();
                         if (!templateOutputFolder.isEmpty()) {
@@ -1994,7 +1994,7 @@ private void generateFilesMetadata(List<File> files) {
                     // Some implementations make the output ./c/d which seems to mix the logic
                     // as documented for symlinks. So we need to trim any / or ./ from the start,
                     // as nobody should be generating into system root and our expectation is no ./
-                    String relativePath = Strings.CS.removeStart(Strings.CS.removeStart(f.toString(), "." + File.separator), File.separator);
+                    String relativePath = removeStart(removeStart(f.toString(), "." + File.separator), File.separator);
                     if (File.separator.equals("\\")) {
                         // ensure that windows outputs same FILES format
                         relativePath = relativePath.replace(File.separator, "/");
@@ -2020,7 +2020,7 @@ private void generateFilesMetadata(List<File> files) {
     }
 
     private String removeTrailingSlash(String value) {
-        return Strings.CS.removeEnd(value, "/");
+        return StringUtils.removeEnd(value, "/");
     }
 
 }