使用SQLWarning20.27.10.Using SQLWarning

 

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLWarning;
import java.sql.Statement;



public class GetValueResultSet {

	public static void main(String[] args) throws Exception{
		Connection con = getConnection();
		Statement st = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
		
		//st.executeUpdate("create table survey(id char(5)not null,name char(30)not null,primarykey(id));");
		//st.executeUpdate("insert into orders (id,custid,total) values ('13','Names',3000)");
		//st.executeUpdate("insert into orders (id,custid,total) values ('21','kang',5000)");
		
		st = con.createStatement();
		ResultSet rs = st.executeQuery("select * from orders");
		
		outputResultSet(rs);
		
		checkForWarning(rs.getWarnings());
		
		rs.close();
		st.close();
		con.close();
	}
	
	private static void outputResultSet(ResultSet rs) throws Exception{
		ResultSetMetaData rsmd = (ResultSetMetaData) rs.getMetaData();
		int numberOfColumns = rsmd.getColumnCount();
		for(int i = 1; i < numberOfColumns; i ++){
			String columnName = rsmd.getColumnName(i);
			System.out.print(columnName + " ");
		}
		System.out.println();
		System.out.println("----------------------");


		while(rs.next()){
			for(int i =1; i < numberOfColumns; i++){
				System.out.print(rs.getString(i) + " ");
			}
			System.out.println();
		}
	}

	static boolean checkForWarning(SQLWarning w){
		if(w == null){
			return false;
		}
		do{
			System.err.println("Warning:\nMessage: " + w.getMessage());
		    System.err.println("SQL state: " + w.getSQLState());
		    System.err.println("Vendor code: " + w.getErrorCode() + "\n----------------");
		    
		}while((w = w.getNextWarning()) != null);
		return true;
	}
	
	public static Connection getConnection() throws Exception{
		Connection con = null;
		Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
		con = DriverManager.getConnection("jdbc:derby:C:/Program Files/Sun/JavaDB/bin/vsjdb;create=true");
		return con;
	}

}