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add method
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@ -33,6 +33,7 @@
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* 【core 】 NumberUtil增加isOdd、isEven方法(pr#474@Gitee)
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* 【http 】 增加HttpGlobalConfig.setBoundary,删除MultipartBody.BOUNDARY和getContentType(issue#I4KSLY@Gitee)
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* 【core 】 DateTime增加setMinimalDaysInFirstWeek(issue#1988@Github)
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* 【db 】 Db增加query重载,可支持自定义PreparedStatement,从而支持游标(issue#I4JXWN@Gitee)
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*
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### 🐞Bug修复
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* 【core 】 修复FileResource构造fileName参数无效问题(issue#1942@Github)
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@ -1,6 +1,7 @@
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package cn.hutool.db;
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import cn.hutool.core.collection.CollUtil;
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import cn.hutool.core.lang.func.Func1;
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import cn.hutool.db.dialect.Dialect;
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import cn.hutool.db.handler.BeanListHandler;
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import cn.hutool.db.handler.EntityHandler;
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@ -20,6 +21,7 @@ import cn.hutool.db.sql.Wrapper;
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import javax.sql.DataSource;
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import java.io.Serializable;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.SQLException;
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import java.util.Collection;
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import java.util.List;
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@ -194,6 +196,27 @@ public abstract class AbstractDb implements Serializable {
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}
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}
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/**
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* 执行自定义的{@link PreparedStatement},结果使用{@link RsHandler}处理<br>
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* 此方法主要用于自定义场景,如游标查询等
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*
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* @param <T> 结果集需要处理的对象类型
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* @param statementFunc 自定义{@link PreparedStatement}创建函数
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* @param rsh 结果集处理对象
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* @return 结果对象
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* @throws SQLException SQL执行异常
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* @since 5.7.17
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*/
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public <T> T query(Func1<Connection, PreparedStatement> statementFunc, RsHandler<T> rsh) throws SQLException {
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Connection conn = null;
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try {
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conn = this.getConnection();
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return SqlExecutor.query(conn, statementFunc, rsh);
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} finally {
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this.closeConnection(conn);
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}
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}
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/**
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* 执行非查询语句<br>
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* 语句包括 插入、更新、删除
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@ -1,6 +1,7 @@
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package cn.hutool.db.sql;
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import cn.hutool.core.collection.ArrayIter;
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import cn.hutool.core.lang.func.Func1;
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import cn.hutool.db.DbUtil;
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import cn.hutool.db.StatementUtil;
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import cn.hutool.db.handler.RsHandler;
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@ -239,6 +240,22 @@ public class SqlExecutor {
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return query(conn, namedSql.getSql(), rsh, namedSql.getParams());
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}
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/**
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* 执行查询语句<br>
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* 此方法不会关闭Connection
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*
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* @param <T> 处理结果类型
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* @param conn 数据库连接对象
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* @param sqlBuilder SQL构建器,包含参数
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* @param rsh 结果集处理对象
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* @return 结果对象
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* @throws SQLException SQL执行异常
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* @since 5.5.3
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*/
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public static <T> T query(Connection conn, SqlBuilder sqlBuilder, RsHandler<T> rsh) throws SQLException {
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return query(conn, sqlBuilder.build(), rsh, sqlBuilder.getParamValueArray());
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}
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/**
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* 执行查询语句<br>
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* 此方法不会关闭Connection
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@ -262,19 +279,30 @@ public class SqlExecutor {
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}
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/**
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* 执行查询语句<br>
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* 此方法不会关闭Connection
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* 执行自定义的{@link PreparedStatement},结果使用{@link RsHandler}处理<br>
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* 此方法主要用于自定义场景,如游标查询等
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*
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* @param <T> 处理结果类型
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* @param conn 数据库连接对象
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* @param sqlBuilder SQL构建器,包含参数
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* @param rsh 结果集处理对象
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* @return 结果对象
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* @param statementFunc 自定义{@link PreparedStatement}创建函数
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* @param rsh 自定义结果集处理
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* @return 结果
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* @throws SQLException SQL执行异常
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* @since 5.5.3
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* @since 5.7.17
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*/
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public static <T> T query(Connection conn, SqlBuilder sqlBuilder, RsHandler<T> rsh) throws SQLException {
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return query(conn, sqlBuilder.build(), rsh, sqlBuilder.getParamValueArray());
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public static <T> T query(Connection conn, Func1<Connection, PreparedStatement> statementFunc, RsHandler<T> rsh) throws SQLException {
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PreparedStatement ps = null;
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try {
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ps = statementFunc.call(conn);
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return executeQuery(ps, rsh);
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} catch (Exception e) {
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if(e instanceof SQLException){
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throw (SQLException) e;
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}
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throw new RuntimeException(e);
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} finally {
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DbUtil.close(ps);
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}
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}
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// -------------------------------------------------------------------------------------- Execute With PreparedStatement
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@ -1,11 +1,14 @@
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package cn.hutool.db;
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import cn.hutool.db.handler.EntityListHandler;
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import cn.hutool.db.sql.Condition;
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import cn.hutool.log.StaticLog;
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import org.junit.Assert;
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import org.junit.Ignore;
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import org.junit.Test;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.List;
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@ -109,4 +112,18 @@ public class DbTest {
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db.del("user", "name", "unitTestUser2");
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});
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}
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@Test
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@Ignore
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public void queryFetchTest() throws SQLException {
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// https://gitee.com/dromara/hutool/issues/I4JXWN
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Db.use().query((conn->{
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PreparedStatement ps = conn.prepareStatement("select * from table",
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ResultSet.TYPE_FORWARD_ONLY,
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ResultSet.CONCUR_READ_ONLY);
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ps.setFetchSize(Integer.MIN_VALUE);
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ps.setFetchDirection(ResultSet.FETCH_FORWARD);
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return ps;
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}), new EntityListHandler());
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}
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}
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