From 80c04d9645038452ca8cfd8c00b19f4ece0d36b2 Mon Sep 17 00:00:00 2001
From: Redkale <redkale@qq.com>
Date: Wed, 4 Jan 2023 10:44:50 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8DJDK15=E4=B8=8BStringBuilder.i?=
 =?UTF-8?q?sEmpty=E6=96=B9=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/org/redkale/boot/Application.java      |  2 +-
 .../java/org/redkale/cluster/CacheClusterAgent.java  |  2 +-
 src/main/java/org/redkale/source/DataJdbcSource.java |  2 +-
 src/main/java/org/redkale/source/DataSqlSource.java  | 12 ++++++------
 4 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/main/java/org/redkale/boot/Application.java b/src/main/java/org/redkale/boot/Application.java
index a9e628485..0e36d6c8b 100644
--- a/src/main/java/org/redkale/boot/Application.java
+++ b/src/main/java/org/redkale/boot/Application.java
@@ -2351,7 +2351,7 @@ public final class Application {
                     clusterRemovedKeys.forEach(k -> {
                         sb.append(ClusterAgent.class.getSimpleName()).append(" skip change '").append(k).append("'\r\n");
                     });
-                    if (!sb.isEmpty()) {
+                    if (sb.length() > 0) {
                         logger.log(Level.INFO, sb.toString());
                     }
                 }
diff --git a/src/main/java/org/redkale/cluster/CacheClusterAgent.java b/src/main/java/org/redkale/cluster/CacheClusterAgent.java
index fd24ae598..2b423f48f 100644
--- a/src/main/java/org/redkale/cluster/CacheClusterAgent.java
+++ b/src/main/java/org/redkale/cluster/CacheClusterAgent.java
@@ -77,7 +77,7 @@ public class CacheClusterAgent extends ClusterAgent implements Resourcable {
             this.ttls = newTtls;
             start();
         }
-        if (!sb.isEmpty()) {
+        if (sb.length() > 0) {
             logger.log(Level.INFO, sb.toString());
         }
     }
diff --git a/src/main/java/org/redkale/source/DataJdbcSource.java b/src/main/java/org/redkale/source/DataJdbcSource.java
index df022848f..c5e062f58 100644
--- a/src/main/java/org/redkale/source/DataJdbcSource.java
+++ b/src/main/java/org/redkale/source/DataJdbcSource.java
@@ -2218,7 +2218,7 @@ public class DataJdbcSource extends DataSqlSource {
             } else {
                 int b = 0;
                 for (String table : tables) {
-                    if (!union.isEmpty()) {
+                    if (union.length() > 0) {
                         union.append(" UNION ALL ");
                     }
                     union.append("SELECT ").append(info.getQueryColumns("a", selects)).append(" FROM ").append(table).append(" a").append(joinAndWhere);
diff --git a/src/main/java/org/redkale/source/DataSqlSource.java b/src/main/java/org/redkale/source/DataSqlSource.java
index 331f04e3f..acbc45511 100644
--- a/src/main/java/org/redkale/source/DataSqlSource.java
+++ b/src/main/java/org/redkale/source/DataSqlSource.java
@@ -210,7 +210,7 @@ public abstract class DataSqlSource extends AbstractDataSource implements Functi
             }
         }
         afterResourceChange();
-        if (!sb.isEmpty()) {
+        if (sb.length() > 0) {
             logger.log(Level.INFO, sb.toString());
         }
     }
@@ -2345,7 +2345,7 @@ public abstract class DataSqlSource extends AbstractDataSource implements Functi
             int b = 0;
             StringBuilder union = new StringBuilder();
             for (String table : tables) {
-                if (!union.isEmpty()) {
+                if (union.length() > 0) {
                     union.append(" UNION ALL ");
                 }
                 union.append("SELECT a.").append(keySqlColumn).append(", ").append(funcSqlColumn)
@@ -2465,7 +2465,7 @@ public abstract class DataSqlSource extends AbstractDataSource implements Functi
         } else {
             StringBuilder union = new StringBuilder();
             for (String table : tables) {
-                if (!union.isEmpty()) {
+                if (union.length() > 0) {
                     union.append(" UNION ALL ");
                 }
                 String subsql = "SELECT ";
@@ -2663,7 +2663,7 @@ public abstract class DataSqlSource extends AbstractDataSource implements Functi
         } else {
             StringBuilder union = new StringBuilder();
             for (String table : tables) {
-                if (!union.isEmpty()) {
+                if (union.length() > 0) {
                     union.append(" UNION ALL ");
                 }
                 union.append("SELECT ").append(info.getQueryColumns("a", selects)).append(" FROM ").append(table).append(" a").append(joinAndWhere);
@@ -2785,7 +2785,7 @@ public abstract class DataSqlSource extends AbstractDataSource implements Functi
         } else {
             StringBuilder union = new StringBuilder();
             for (String table : tables) {
-                if (!union.isEmpty()) {
+                if (union.length() > 0) {
                     union.append(" UNION ALL ");
                 }
                 union.append("SELECT ").append(info.getSQLColumn("a", column)).append(" FROM ").append(table).append(" a").append(joinAndWhere);
@@ -2913,7 +2913,7 @@ public abstract class DataSqlSource extends AbstractDataSource implements Functi
         } else {
             StringBuilder union = new StringBuilder();
             for (String table : tables) {
-                if (!union.isEmpty()) {
+                if (union.length() > 0) {
                     union.append(" UNION ALL ");
                 }
                 union.append("SELECT ").append(info.getPrimarySQLColumn("a")).append(" FROM ").append(table).append(" a").append(joinAndWhere);