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a fast small database connection pool and a active record flavor mini framework

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package com.bixuebihui.jdbc;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * 读取 SQL 脚本并执行
 *
 * @author Unmi
 * @version $Id: $Id
 */
public class SqlFileExecutor {
	private static final Logger LOG = LoggerFactory.getLogger(SqlFileExecutor.class);

	private boolean batchExecute = false;
	private String defaultEncoding="UTF-8";

	public SqlFileExecutor setAllowMultiQueries(boolean allowMultiQueries) {
		this.allowMultiQueries = allowMultiQueries;
		return this;
	}

	private boolean allowMultiQueries = true;


	/**
	 * 读取 SQL 文件,获取 SQL 语句
	 *
	 * @param sqlFile
	 *            SQL 脚本文件
	 * @return List 返回所有 SQL 语句的 List
	 * @throws IOException 文件加载出错
	 */
	private List loadSql(String sqlFile) throws IOException {
		try (InputStream sqlFileIn = new FileInputStream(sqlFile)) {
			return loadSqlFromStream(sqlFileIn);
		}
	}


	/**
	 * 读取 SQL 文件,获取 SQL 语句
	 *
	 * @param sqlFile
	 *            SQL 脚本文件
	 * @return List 返回所有 SQL 语句的 List
	 */
	private List loadSqlFromStream(InputStream sqlFile) throws IOException {
		List sqlList = new ArrayList<>();

		StringBuilder buffer = new StringBuilder();
		try (
				InputStreamReader isr = new InputStreamReader(sqlFile, defaultEncoding);
				Reader in = new BufferedReader(isr)
		) {

			int ch;
			while ((ch = in.read()) > -1) {
				buffer.append((char)ch);
			}

			// Windows 下换行是 \r\n, Linux 下是 \n
			if(allowMultiQueries){
				sqlList.add(buffer.toString());
			}else {
				// without a collect sql grammar parser the below replace maybe buggy. use it only by fortune!
				String[] sqlArr = buffer.toString()
						.split("(;\\s*\\r\\n)|(;\\s*\\n)");
				for (int i = 0; i < sqlArr.length; i++) {
					String sql = sqlArr[i].replaceAll("--\\s+.*", "").trim();
					if (!"".equals(sql)) {
						sqlList.add(sql);
					}
				}
			}
			return sqlList;
		}
	}

	/**
	 * 传入连接来执行 SQL 脚本文件,这样可与其外的数据库操作同处一个事物中
     *
     * @param conn
	 *            传入数据库连接
	 * @param sqlFile
	 *            SQL 脚本文件
     * @throws java.io.IOException 加载文件出错
     * @throws java.sql.SQLException 数据库出错
     */
	public void execute(Connection conn, String sqlFile) throws IOException, SQLException {
		List sqlList = loadSql(sqlFile);
		execute(conn, sqlList);
	}

    /**
     * 

execute.

* * @param conn a {@link java.sql.Connection} object. * @param sqlFile a {@link java.io.InputStream} object. * @throws java.io.IOException if any. * @throws java.sql.SQLException if any. */ public void execute(Connection conn, InputStream sqlFile) throws IOException, SQLException { List sqlList = loadSqlFromStream(sqlFile); execute(conn, sqlList); } /** *

main.

* * @param args an array of {@link java.lang.String} objects. * @throws java.lang.Exception if any. */ public static void main(String[] args) throws Exception { List sqlList = new SqlFileExecutor().loadSql(args[0]); LOG.info("size:" + sqlList.size()); for (String sql : sqlList) { LOG.info(sql); } } private void execute(Connection conn, List sqlList) throws SQLException { try (Statement stmt = conn.createStatement()) { if (this.batchExecute) { for (int i = 0; i < sqlList.size(); i++) { String sql = sqlList.get(i); stmt.addBatch(sql); } int[] rows = stmt.executeBatch(); LOG.info("Row count:" + Arrays.toString(rows)); } else { for (int i = 0; i < sqlList.size(); i++) { String sql = sqlList.get(i); try { if (stmt.execute(sql)) { LOG.info("RETURN RESULT SET IGNORED: " + sql); } else { LOG.info("RETURN UPDATE COUNT: "+stmt.getUpdateCount()+" " + sql); } } catch (SQLException e) { LOG.error("",e); } } } } } /** * 传入连接来执行 SQL 脚本文件,这样可与其外的数据库操作同处一个事物中 * * @param conn * 传入数据库连接 * @param sqlFile * SQL 脚本文件 * @param testTableName * 用来检测表或视图是否存在的名称,如存在则不执行文件 * @throws java.io.IOException 加载文件出错 * @throws java.sql.SQLException 数据库出错 */ public void execute(Connection conn, String sqlFile, String testTableName) throws SQLException, IOException { if (!JDBCUtils.tableOrViewExists(null, null, testTableName, conn)) { execute(conn, sqlFile); } else { LOG.warn("Table [" + testTableName + "] already exists!"); } } /** *

isBatchExecute.

* * @return a boolean. */ public boolean isBatchExecute() { return batchExecute; } /** *

Setter for the field batchExecute.

* * @param batchExecute a boolean. */ public void setBatchExecute(boolean batchExecute) { this.batchExecute = batchExecute; } /** *

getEncoding.

* * @return a {@link java.lang.String} object. */ public String getEncoding() { return defaultEncoding; } /** *

settEncoding.

* * @param encoding a {@link java.lang.String} object. */ public void settEncoding(String encoding) { this.defaultEncoding = encoding; } }




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