快速业务通道

JDBC中Statement,PreparedStatement,CallableStatement三个方法的实例 - 编程入门网

作者 佚名技术 来源 NET编程 浏览 发布时间 2012-06-18

JDBC中Statement,PreparedStatement,CallableStatement三个方法的实例

时间:2011-03-24

public void ListStudents() throws SQLException{  int i, NoofColumns;  String StNo, StFName, StLName;  //初始化并加载JDBC-ODBC驱动程序  Class.forName("jdbc.odbc.JdbcOdbcDriver");  //创建连接对象  Connection Ex1Con = DriverManager.getConnection("jdbc:odbc:StudentDB";uid="admin";pw="sa");  //创建一个简单的Statement对象  Statement Ex1Stmt = Ex1Con.createStatement();  //创建SQL串,传送到DBMS并执行SQL语句  ResultSet Ex1rs = Ex1Stmt.executeQuery("SELECT StudentID, FirstName, LastName FROM Students");  //处理每一个数据行,直到不再有数据行  System.out.println("Student Number   First Name   Last Name");  while(Ex1rs.next()){  //将列值保存到java变量中  StNo = Ex1rs.getString(1);  StFName = Ex1rs.getString(2);  StLName = Ex1rs.getString(3);  System.out.println(StNo, StFName, StLName);  } } public void UpdateStudentName(String StFName, String StLName, String StNo) throws SQLException, ClassNotFoundException {  int RetValue;  //初始化并加载JDBC-ODBC驱动程序  Class.forName("jdbc.odbc.JdbcOdbcDriver");  //创建连接对象  Connection Ex1Con = DriverManager.getConnection("jdbc:odbc:StudentDB";uid="admin";pw="sa");  //创建一个简单的Statement对象  Statement Ex1Stmt = Ex1Con.createStatement();  //创建SQL串,传送到DBMS并执行该SQL语句  String SQLBuffer = "UPDATE Students SET FirstName = " +  StFName + ",LastName = " + StLName +  "WHERE StudentNumber = " + StNo;  RetValue = Ex1Stmt.executeUpdate(SQLBuffer);  System.out.println("Updated" + RetValue + "rows in the Database."); } //使用PreparedStatement改进实例 //Declare class variables Connection Con; PreparedStatement PrepStmt; boolean Initialized = false; public void InitConnection() throws SQLException, ClassNotFoundException{  //Initialize and load the JDBC-ODBC driver.  Class.forName("jdbc.odbc.JdbcOdbcDriver");  //Make the connection object.  Con = DriverManager.getConnection("jdbc:odbc:StudentDB";uid="admin";pw="sa");  //Create a prepared Statement object.  PrepStmt = Con.prepareStatement("SELECT ClassName, Location, DaysAndTimes FROM Classes WHERE ClassName = ?");  Initialized = true; } public void ListOneClass(String ListClassName) throws SQLException, ClassNotFoundException{  int i, NoOfColumns;  String ClassName, ClassLocation, ClassSchedule;  if(!Initialized){  InitConnection();  }  //Set the SQL parameter to the one passed into this method  PrepStmt.setString(1, ListClassName);  ResultSet Ex1rs = PrepStmt.executeQuery();  //Process each row until there are no more rows and display the results on the console.  System.out.println("Class Location Schedule");  while(Ex1rs.next()){  ClassName = Ex1rs.getString(1);  ClassLocation = Ex1rs.getString(2);  ClassSc

凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务,公司网站:http://www.lingzhong.cn 为了给广大客户了解更多的技术信息,本技术文章收集来源于网络,凌众科技尊重文章作者的版权,如果有涉及你的版权有必要删除你的文章,请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息,谢谢!

分享到: 更多

Copyright ©1999-2011 厦门凌众科技有限公司 厦门优通互联科技开发有限公司 All rights reserved

地址(ADD):厦门软件园二期望海路63号701E(东南融通旁) 邮编(ZIP):361008

电话:0592-5908028 传真:0592-5908039 咨询信箱:web@lingzhong.cn 咨询OICQ:173723134

《中华人民共和国增值电信业务经营许可证》闽B2-20100024  ICP备案:闽ICP备05037997号