fix code

hutool-db/src/main/java/cn/hutool/db/meta/ResultColumn.java

@@ -151,17 +151,16 @@ public class ResultColumn {
 		return className;
 	}
 
-	public static enum ColumnNullable {
+	public enum ColumnNullable {
 		NO_NULLS(ResultSetMetaData.columnNoNulls),
 		NULLABLE(ResultSetMetaData.columnNullable),
 		UNKNOWN(ResultSetMetaData.columnNullableUnknown);
 
-		final int value;
-
-		private ColumnNullable(final int value) {
-			this.value = value;
-		}
-
+		/**
+		 * ResultSetMetaData中的int值转枚举
+		 * @param nullable nullable值
+		 * @return ColumnNullable
+		 */
 		public static ColumnNullable of(final int nullable) {
 			switch (nullable) {
 				case ResultSetMetaData.columnNoNulls:
@@ -172,5 +171,10 @@ public class ResultColumn {
 					return UNKNOWN;
 			}
 		}
+
+		final int value;
+		ColumnNullable(final int value) {
+			this.value = value;
+		}
 	}
 }

hutool-db/src/main/java/cn/hutool/db/sql/ConditionGroup.java

@@ -13,6 +13,7 @@ import java.util.List;
  * @since 5.7.21
  */
 public class ConditionGroup extends Condition {
+	private static final long serialVersionUID = 1L;
 	/**
 	 * 条件列表
 	 */

hutool-db/src/test/java/cn/hutool/db/DerbyTest.java

@@ -5,7 +5,6 @@ import org.junit.BeforeClass;
 import org.junit.Ignore;
 import org.junit.Test;
 
-import java.sql.SQLException;
 import java.util.List;
 
 /**
@@ -19,7 +18,7 @@ public class DerbyTest {
 	private static final String DS_GROUP_NAME = "derby";
 
 	@BeforeClass
-	public static void init() throws SQLException {
+	public static void init() {
 		final Db db = Db.of(DS_GROUP_NAME);
 		db.execute("CREATE TABLE test(a INTEGER, b BIGINT)");
 
@@ -31,14 +30,14 @@ public class DerbyTest {
 
 	@Test
 	@Ignore
-	public void queryTest() throws SQLException {
+	public void queryTest() {
 		final List<Entity> query = Db.of(DS_GROUP_NAME).query("select * from test");
 		Assert.assertEquals(4, query.size());
 	}
 
 	@Test
 	@Ignore
-	public void findTest() throws SQLException {
+	public void findTest() {
 		final List<Entity> query = Db.of(DS_GROUP_NAME).find(Entity.of("test"));
 		Assert.assertEquals(4, query.size());
 	}