add setFetchSize and FetchDirection

hutool-db/src/main/java/cn/hutool/v7/db/config/DbConfig.java

@@ -16,9 +16,11 @@
 
 package cn.hutool.v7.db.config;
 
+import cn.hutool.v7.db.Db;
 import cn.hutool.v7.db.dialect.Dialect;
 import cn.hutool.v7.db.driver.DriverUtil;
 import cn.hutool.v7.db.ds.DSFactory;
+import cn.hutool.v7.db.sql.FetchDirection;
 import cn.hutool.v7.db.sql.filter.SqlFilter;
 import cn.hutool.v7.db.sql.filter.SqlFilterChain;
 
@@ -80,6 +82,15 @@ public class DbConfig extends ConnectionConfig<DbConfig> {
 	 */
 	private Dialect dialect;
 
+	/**
+	 * 结果集的一次取出数据的数量，0或null表示默认值
+	 */
+	private Integer fetchSize;
+	/**
+	 * 结果集的游标方向
+	 */
+	private FetchDirection fetchDirection;
+
 	/**
 	 * 构造
 	 */
@@ -169,4 +180,41 @@ public class DbConfig extends ConnectionConfig<DbConfig> {
 		this.dialect = dialect;
 		return this;
 	}
+
+
+	/**
+	 * 获取一次取出数据的数量，0或null表示默认值
+	 * @return 一次取出数据的数量，0或null表示默认值
+	 */
+	public Integer getFetchSize() {
+		return fetchSize;
+	}
+
+	/**
+	 * 设置一次取出数据的数量，0或null表示默认值
+	 * @param fetchSize 一次取出数据的数量，0或null表示默认值
+	 * @return this
+	 */
+	public DbConfig setFetchSize(final Integer fetchSize) {
+		this.fetchSize = fetchSize;
+		return this;
+	}
+
+	/**
+	 * 获取结果集的游标方向
+	 * @return 结果集的游标方向
+	 */
+	public FetchDirection getFetchDirection() {
+		return fetchDirection;
+	}
+
+	/**
+	 * 设置结果集的游标方向
+	 * @param fetchDirection 结果集的游标方向
+	 * @return this
+	 */
+	public DbConfig setFetchDirection(final FetchDirection fetchDirection) {
+		this.fetchDirection = fetchDirection;
+		return this;
+	}
 }

hutool-db/src/main/java/cn/hutool/v7/db/dialect/impl/MysqlDialect.java

@@ -25,6 +25,7 @@ import cn.hutool.v7.db.dialect.DialectName;
 import cn.hutool.v7.db.sql.QuoteWrapper;
 import cn.hutool.v7.db.sql.SqlBuilder;
 
+import java.io.Serial;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 
@@ -34,6 +35,7 @@ import java.sql.PreparedStatement;
  * @author loolly
  */
 public class MysqlDialect extends AnsiSqlDialect {
+	@Serial
 	private static final long serialVersionUID = -3734718212043823636L;
 
 	/**
@@ -81,7 +83,7 @@ public class MysqlDialect extends AnsiSqlDialect {
 		// 构建字段部分和参数占位符部分
 		entity.forEach((field, value) -> {
 			if (StrUtil.isNotBlank(field)) {
-				if (fieldsPart.length() > 0) {
+				if (!fieldsPart.isEmpty()) {
 					// 非第一个参数，追加逗号
 					fieldsPart.append(", ");
 					placeHolder.append(", ");

hutool-db/src/main/java/cn/hutool/v7/db/ds/bee/BeeDSFactory.java

@@ -24,6 +24,7 @@ import org.stone.beecp.BeeDataSource;
 import org.stone.beecp.BeeDataSourceConfig;
 
 import javax.sql.DataSource;
+import java.io.Serial;
 import java.util.Properties;
 
 /**
@@ -32,6 +33,7 @@ import java.util.Properties;
  * @author Looly
  */
 public class BeeDSFactory extends AbstractDSFactory {
+	@Serial
 	private static final long serialVersionUID = 1L;
 
 	/**

hutool-db/src/main/java/cn/hutool/v7/db/sql/FetchDirection.java

@@ -0,0 +1,43 @@
+package cn.hutool.v7.db.sql;
+
+import java.sql.ResultSet;
+
+/**
+ * 获取结果集的移动方向
+ *
+ * @author looly
+ * @since 7.0.0
+ */
+public enum FetchDirection {
+
+	/**
+	 * 默认方向
+	 */
+	FORWARD(ResultSet.FETCH_FORWARD),
+	/**
+	 * 反向
+	 */
+	REVERSE(ResultSet.FETCH_REVERSE),
+	/**
+	 * 不确定方向
+	 */
+	UNKNOWN(ResultSet.FETCH_UNKNOWN);
+
+	/**
+	 * 获取值
+	 */
+	private final int value;
+
+	FetchDirection(int value) {
+		this.value = value;
+	}
+
+	/**
+	 * 获取值
+	 *
+	 * @return 值
+	 */
+	public int getValue() {
+		return value;
+	}
+}

hutool-db/src/main/java/cn/hutool/v7/db/sql/StatementBuilder.java

@@ -28,6 +28,7 @@ import cn.hutool.v7.db.DbException;
 import cn.hutool.v7.db.Entity;
 import cn.hutool.v7.db.sql.filter.SqlFilter;
 
+import java.io.Serial;
 import java.sql.*;
 import java.util.HashMap;
 import java.util.List;
@@ -41,6 +42,7 @@ import java.util.Set;
  * @since 6.0.0
  */
 public class StatementBuilder implements Builder<StatementWrapper> {
+	@Serial
 	private static final long serialVersionUID = 1L;
 
 	/**
@@ -163,8 +165,7 @@ public class StatementBuilder implements Builder<StatementWrapper> {
 				}
 				if (ArrayUtil.isArray(params)) {
 					ps.fillParams(new ArrayIter<>(params), nullTypeMap);
-				} else if (params instanceof Entity) {
-					final Entity entity = (Entity) params;
+				} else if (params instanceof Entity entity) {
 					// 对于多Entity批量插入的情况，为防止数据不对齐，故按照首行提供键值对筛选。
 					if(null == keys){
 						keys = entity.keySet();

hutool-db/src/main/java/cn/hutool/v7/db/sql/StatementUtil.java

@@ -51,13 +51,28 @@ public class StatementUtil {
 	 * @since 5.8.19
 	 */
 	public static PreparedStatement prepareStatement(final boolean returnGeneratedKey, final DbConfig config, final Connection conn, final String sql, final Object... params) {
-		return StatementBuilder.of()
+		PreparedStatement statement = StatementBuilder.of()
 			.setConnection(conn)
 			.setReturnGeneratedKey(returnGeneratedKey)
 			.setSqlFilter(Opt.ofNullable(config).map(DbConfig::getSqlFilters).getOrNull())
 			.setSql(sql)
 			.setParams(params)
 			.build();
+
+		try{
+			final Integer fetchSize = config.getFetchSize();
+			if (null != fetchSize) {
+				statement.setFetchSize(fetchSize);
+			}
+			final FetchDirection fetchDirection = config.getFetchDirection();
+			if (null != fetchDirection) {
+				statement.setFetchDirection(fetchDirection.getValue());
+			}
+		} catch (SQLException e){
+			throw new DbException(e);
+		}
+
+		return statement;
 	}
 
 	/**

hutool-db/src/main/java/module-info.java

@@ -22,6 +22,10 @@ module hutool.db {
 
 	exports cn.hutool.v7.db;
 	exports cn.hutool.v7.db.config;
+	exports cn.hutool.v7.db.handler;
+	exports cn.hutool.v7.db.dialect;
+	exports cn.hutool.v7.db.sql;
+	exports cn.hutool.v7.db.sql.filter;
 	exports cn.hutool.v7.db.ds;
 	exports cn.hutool.v7.db.ds.bee;
 	exports cn.hutool.v7.db.ds.c3p0;