DataResultSetRow增加getColumnLabels方法

src/main/java/org/redkale/boot/Application.java

@@ -1777,7 +1777,7 @@ public final class Application {
                 AnyValue old = findSourceConfig(name, "cachesource");
                 conf.forEach((k, v) -> {
                     events.add(ResourceEvent.create(k, v, old == null ? null : old.getValue(k)));
-                    ((DefaultAnyValue) old).setValue(k, v);
+                    if (old != null) ((DefaultAnyValue) old).setValue(k, v);
                 });
                 ((AbstractCacheSource) source).onChange(events.toArray(new ResourceEvent[events.size()]));
             });
@@ -1791,7 +1791,7 @@ public final class Application {
                 AnyValue old = findSourceConfig(name, "datasource");
                 conf.forEach((k, v) -> {
                     events.add(ResourceEvent.create(k, v, old == null ? null : old.getValue(k)));
-                    ((DefaultAnyValue) old).setValue(k, v);
+                    if (old != null) ((DefaultAnyValue) old).setValue(k, v);
                 });
                 ((AbstractDataSource) source).onChange(events.toArray(new ResourceEvent[events.size()]));
             });

src/main/java/org/redkale/source/DataJdbcSource.java

@@ -1040,6 +1040,21 @@ public class DataJdbcSource extends DataSqlSource {
                 }
             }
 
+            @Override
+            public List<String> getColumnLabels() {
+                try {
+                    ResultSetMetaData meta = rr.getMetaData();
+                    int count = meta.getColumnCount();
+                    List<String> labels = new ArrayList<>(count);
+                    for (int i = 1; i <= count; i++) {
+                        labels.add(meta.getColumnLabel(i));
+                    }
+                    return labels;
+                } catch (SQLException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+
             @Override
             public boolean wasNull() {
                 try {

src/main/java/org/redkale/source/EntityInfo.java

@@ -1393,15 +1393,17 @@ public final class EntityInfo<T> {
         //index从1开始
         public Object getObject(int index);
 
-        public Object getObject(String column);
+        public Object getObject(String columnLabel);
 
         //index从1开始
-        default <T> Serializable getObject(Attribute<T, Serializable> attr, int index, String column) {
+        default <T> Serializable getObject(Attribute<T, Serializable> attr, int index, String columnLabel) {
-            return DataResultSet.getRowColumnValue(this, attr, index, column);
+            return DataResultSet.getRowColumnValue(this, attr, index, columnLabel);
         }
 
         //判断当前行值是否为null
         public boolean wasNull();
+
+        public List<String> getColumnLabels();
     }
 
     public static class EntityColumn {