tablemajorlengthconcert.java

一个可以存储和打印成绩单的系统

package org.wuhang.transfer;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Vector;
public class TableMajorlengthConcert {
	static HashMap<Integer,Integer> id_num = new HashMap<Integer,Integer>();
	public HashMap<Integer,Integer> getID_Num(){
		return id_num;
	}
	public void daoMajorlength(Connection import_con,Connection export_con){
    	try {
    		PreparedStatement import_st = null;
			PreparedStatement export_st = null;
			Vector<Integer> length = new Vector<Integer>();
			String export_sql = "select * from majorlength";
			export_st = export_con.prepareStatement(export_sql);
			ResultSet rs = export_st.executeQuery();
			
			String import_sql = "insert into majorlength (length) values (?)";
			import_st = import_con.prepareStatement(import_sql);
			int count = 0;
			while(rs.next()){
				count++;
				id_num.put(rs.getInt("id"), count);
				length.addElement(rs.getInt("length"));
			}
			rs.close();
			export_st.close();
			for(int i=0;i<count;i++){
				import_st.setInt(1, length.elementAt(i));
			    import_st.execute();
			}
			if(!length.isEmpty()){
				length.clear();
			}
			
			import_st.close();
			import_con.commit();
			export_con.commit();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
}