tablelist.java

来自「java数据库编程。JDBC+SQL+GUI。用java写的一个影碟租赁系统」· Java 代码 · 共 125 行

//Vedio rental System Developed by Banu
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;

public class tableList
{
	
	private Vector vecTables = new Vector();
	private Connection databaseConnection;
	
	public tableList (Connection databaseConnection) throws SQLException
	{
		
		this.databaseConnection = databaseConnection;
		setupList();
		
	}
	
	public void setupList () throws SQLException
	{
		
		ResultSet rsList;
		
		DatabaseMetaData dmd = databaseConnection.getMetaData();
	    rsList = dmd.getTables(null, null, "%", null);
	    
	    while (rsList.next())
	    {
		    
		    if (rsList.getString(4).equalsIgnoreCase("TABLE"))
		    {
			    vecTables.addElement(rsList.getString(3));
		    }
		    
	    }	    
	    
    }
    
    public void addTable (String strTableName) throws Exception
    {
		    
	    try
	    {
	    
		    Statement s = databaseConnection.createStatement();
		    s.execute("create table " + strTableName + " (Title varchar(40), Year integer)");
		    s.close();		    
		    vecTables.addElement(strTableName);
		    
	    }
	    catch (SQLException ex)
	    {
		    throw new Exception("Error creating " + strTableName);
	    }

    }
    
    
    
    public void deleteTable (String strTableName) throws Exception
    {
		    
	    try
	    {
		    
		    Statement s = databaseConnection.createStatement();
		    s.execute("drop table " + strTableName);
		    s.close();		    
	    	vecTables.removeElement(strTableName);	
	    	
    	}
    	catch (SQLException ex)
    	{
	    	throw new Exception("Error deleting " + strTableName);
    	}
	    
    }
	
	public String[] getList ()
	{
		
		String [] strTemp = new String[1];
		strTemp[0] = "---";
		
		if (vecTables.size() == 0)
	    {
		    return strTemp;
	    }
	    
		String[] strList = new String[vecTables.size()];

	    for (int i = 0; i < vecTables.size(); i++)
	    {		    
		    strList[i] = (String)vecTables.elementAt(i);		    
	    }
	    
	    return strList;
	    
    }
    
    public ResultSet getRecords (String strTableName) throws Exception
    {
		    		    
	    try
	    {
	    	    
		    Statement s = databaseConnection.createStatement();
		    s.execute("select * from " + strTableName);
		    return s.getResultSet();
		    
		    
	    }
	    catch (SQLException ex)
	    {
		    System.out.println("error geting result set ");
	    	throw new Exception("Error reading from " + strTableName);
	    }
    
    }
	
}