databasemanager.java~4~

用java写的一个图书馆管理系统,应该说功能相当全面.包含所有源代码,从数据库的建立到客户端.

import java.sql.*;

public class DataBaseManager {
  Connection con;
  ResultSet rs;
  Statement stmt;
  public DataBaseManager() {
    try {
      String url = "jdbc:odbc:LibraryBase";
      Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
      con = DriverManager.getConnection(url);
      stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
                                 ResultSet.CONCUR_UPDATABLE);
    }
    catch (SQLException sqle) {
      System.out.println(sqle.toString());
    }
    catch (ClassNotFoundException cnfex) {
      cnfex.printStackTrace();
    }
  }

  public ResultSet getResult(String strSQL) {
    try {
      rs = stmt.executeQuery(strSQL);
      return rs;
    }
    catch (SQLException sqle) {
      System.out.println(sqle.toString());
      return null;
    }

  }

  public int updateSql(String strSQL) {
    try {
      int i=stmt.executeUpdate(strSQL);
      con.commit();
      return i;
    }
    catch (SQLException sqle) {
      System.out.println(sqle.toString());
      return -1;
    }

  }

  public void closeConnection() {
    try {
      con.close();
    }
    catch (SQLException sqle) {
      System.out.println(sqle.toString());
    }
  }

}