sqlresult.java

java程序设计入门教程 书上的源代码 学习JAVA非常好的入门教材代码推荐给大家

/************************ SqlResult.java ******************/
import java.sql.*;
public class SqlResult
  {
  private Connection con;
  private String sql;
  public SqlResult(Connection con, String sql)
    {
    this.con = con;
    this.sql = sql;
    }
  public String toString()
    {
    StringBuffer sb = new StringBuffer();
    try
      {
      Statement statement = con.createStatement();
      if (statement.execute(sql))
        {
        ResultSet rs = statement.getResultSet();    
        ResultSetMetaData md = rs.getMetaData();
        int colCount = md.getColumnCount();
        sb.append("<TABLE CELLSPACING=10><TR>");
        for (int i = 1; i <= colCount; i++)
          sb.append("<TH>" + md.getColumnLabel(i));
        while (rs.next())
          {
          sb.append("<TR>");
          for (int i = 1; i <= colCount; i++)
            {
            sb.append("<TD>");
            Object obj = rs.getObject(i);
            if (obj != null)
              sb.append(obj.toString());
            else
              sb.append("&nbsp;");
            }
          }
        sb.append("</TABLE>\n");
        }
      else
        sb.append("<B>Update Count:</B> " +
                   statement.getUpdateCount());
      }
    catch (SQLException e)
      {
      sb.append("</TABLE><H1>SQL ㄒ