optimize code

Author: jackyding(丁磊)

dep/cos_migrate_tool-1.0-jar-with-dependencies.jar

@@ -41,7 +41,7 @@ public MigrateCopyBucketTaskExecutor(CopyBucketConfig config) {
         super(MigrateType.MIGRATE_FROM_COS_BUCKET_COPY, config);
         String src_token = ((CopyBucketConfig) config).getSrcToken();
         COSCredentials srcCred = null;
-        if (src_token != null && !src_token.trim().isEmpty()) {
+        if (src_token != null && !src_token.isEmpty()) {
             log.info("Use temporary token to list object");
             System.out.println("Use temporary token to list object");
             srcCred = new BasicSessionCredentials(config.getSrcAk(), config.getSrcSk(), src_token);

src/main/java/com/qcloud/cos_migrate_tool/task/MigrateCopyBucketTaskExecutor.java

@@ -62,7 +62,7 @@ public TaskExecutor(MigrateType migrateType, CommonConfig config) {
         COSCredentials cred = null;
         String token = config.getToken();
         // supporting temporary token
-        if (token != null && !token.trim().isEmpty()) {
+        if (token != null && !token.isEmpty()) {
             log.info("Use temporary token to put object");
             System.out.println("Use temporary token to put object");
             cred = new BasicSessionCredentials(config.getAk(), config.getSk(), token);