notebook.java

用jsp与sql编写的notebook。

//文件名ntoebook.java 包名：book
package book;
import java.sql.*;
public class notebook{
String sDBDriver = "org.gjt.mm.mysql.Driver";
String sConnStr = "jdbc:mysql://localhost:3306/notebook?user=root&password=";
Connection conn = null;
ResultSet rs = null;
public notebook() throws SQLException{
try {
Class.forName(sDBDriver); 
}
catch(java.lang.ClassNotFoundException e) {
System.err.println( e.getMessage());
}
}
public ResultSet executeQuery(String sql) {
rs = null;
try {
conn = DriverManager.getConnection(sConnStr); 
Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs = stmt.executeQuery(sql);
} 
catch(SQLException ex) { 
System.err.println(ex.getMessage());
}
return rs;
}
//定义executeUpdate方法
public void executeUpdate(String sql) {
try {
conn = DriverManager.getConnection(sConnStr); 
Statement stmt = conn.createStatement();
stmt.executeUpdate(sql);
stmt.close();
conn.close();
}
catch(SQLException ex) { 
System.err.println("aq.executeUpdate: " + ex.getMessage());
System.err.println("aq.executeUpadatestrSQL: " + sql);
}
}
}