oracle：sqlite：表數據遷移（笨辦法實現：java）：多線程優化

package com.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.data.util.JdbcUtil;

public class OracleToSqlite extends Thread{
	private String startRow = "";
	private String endRow = "";
	
	public OracleToSqlite(String startRow, String endRow) {
		super();
		this.startRow = startRow;
		this.endRow = endRow;
	}
	
	/**
	 * 連接sqlite數據庫
	 * @param absolutePath
	 * @param sqliteName
	 * @return
	 */
	public static Connection getConnectionSqlite(String absolutePath, String sqliteName){
		Connection co=null;
		try {
			String url ="jdbc:sqlite:" + absolutePath + sqliteName +".db";
			Class.forName("org.sqlite.JDBC");
			co = DriverManager.getConnection(url);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return co;
	}
	
	/**
	 * 創建sqlite的數據庫表
	 */
	public static void init(){
		String sql = "create table Test( idcard   VARCHAR2(50), name VARCHAR2(50));";
		
		try (Connection toCon = getConnectionSqlite("E:/sqlite/db/","yh");
			PreparedStatement ps=toCon.prepareStatement(sql);){
			ps.execute();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		
	}

	public void run() {
		String fromSql = " select total.idcard, total.name" +
			" from" +
					" ( select row_limit.*, rownum rownum_ " +
					" from " +
							" ( select t.idcard," +
									" t.name" +
							" from Test t  " +
							" order by t.idcard, t.name " +
							" ) row_limit" +
					" where rownum <?" +
			" )total" +
			" where rownum_ >=?" ;

		String toSql = "insert into Test(" +
					" idcard, name" +
					" ) values (" +
					" ?, ?)";
		ResultSet fromResultSet = null;
		try(Connection fromCon = JdbcUtil.getConnectionGzzh();
			Connection toCon = getConnectionSqlite("E:/sqlite/db/","yh");
			PreparedStatement fromPreparedStatement = fromCon.prepareStatement(fromSql);
			PreparedStatement toPreparedStatement = toCon.prepareStatement(toSql)){
		
			toCon.setAutoCommit(false);
		
			fromPreparedStatement.setString(1, endRow);
			fromPreparedStatement.setString(2, startRow);
			fromResultSet = fromPreparedStatement.executeQuery();
				
			int num = 0;
			while(fromResultSet.next()){
				num++;
				
				String idcard = fromResultSet.getString("idcard");
				String name = fromResultSet.getString("name");
				
				toPreparedStatement.setString(1, idcard);
				toPreparedStatement.setString(2, name);
				
				toPreparedStatement.addBatch();
				
				if(num % 3000 == 0){
					System.out.println(num);
					toPreparedStatement.executeBatch();
					toCon.commit();
				}
				
			}
				
			System.out.println("end："+num);
			toPreparedStatement.executeBatch();
			toCon.commit();
		
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			JdbcUtil.close(null, fromResultSet, null);
		}
	};
	
	public static void main(String[] args) {
		try {
			init();
			Thread.sleep(3000);
			new OracleToSqlite("0", "100000").start();
			new OracleToSqlite("100000", "200000").start();
			new OracleToSqlite("200000", "300000").start();
			new OracleToSqlite("300000", "400000").start();
			new OracleToSqlite("400000", "500000").start();
			new OracleToSqlite("500000", "600000").start();
			new OracleToSqlite("600000", "700000").start();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
}