再补充问一下, public int executeUpdate(String sql)
与public int executeUpdate_id(String sql)有怎么不一样!
stmt = conn.createStatement(1004, 1007);
这句是怎么作用!!!
与public int executeUpdate_id(String sql)有怎么不一样!
stmt = conn.createStatement(1004, 1007);
这句是怎么作用!!!
解决方案 »
- 小弟用HttpClient对一个网页进行模拟登陆,但是对HttpClient不太熟练遇到了点问题。请各位大哥花点时间帮小弟改下呗O(∩_∩)O~
- js验证文本编辑器
- 关于在jsp中图象,文字切换的问题??
- javascript问题
- ◣◣欢迎加入ASP群8889251! 独学而无友,则孤陋寡闻。集思广益,希望我们在讨论交流中共同进步!
- 邮件的uid是什么,解释清楚了送高分,帮我顶的朋友也有高分相赠。
- android 问题求助!!!!!!
- 如何控制表格的高度始终在页面内,而不会随着显示器尺寸何分辨率的改变而变高,变低?没分了,过几天补
- 急!servlet的问题?
- 关于程序接口问题,请高手指教!!!
- 新手请教 望多帮忙
- 有没有返回之前的某一页的代码
public static final int CLOSE_CURSORS_AT_COMMIT 2
public static final int CONCUR_READ_ONLY 1007
public static final int CONCUR_UPDATABLE 1008
public static final int FETCH_FORWARD 1000
public static final int FETCH_REVERSE 1001
public static final int FETCH_UNKNOWN 1002
public static final int HOLD_CURSORS_OVER_COMMIT 1
public static final int TYPE_FORWARD_ONLY 1003
public static final int TYPE_SCROLL_INSENSITIVE 1004
public static final int TYPE_SCROLL_SENSITIVE 1005
Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);====>Statement stmt = con.createStatement(1004,1007);
FlowerelementDAO
{
Connection conn =null;
Statement stmt = null;
FlowerelementDAO()
{
conn = new connDB().getConne();
stmt = conn.create....();
} void insert(flowerelement f)
{
stmt.exe...("insert into ..... values('"+f.getXXX()+"','"+f.getYYY()+"')");
}
void update(flowerelement f)
{
stmt.exeupdate("update flowerelement set xxx='"+f.getXXX+"',yyy='"+f.getYYY()+"'")
}
void delete(flowerelement f)
{
stmt.exeupdate("delete flowerelement where fff="+f.getFFF());
}
}public class connDB
{
Connection conn = null;
public connDB()
{
try
{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
conn = DriverManager.get.....();
}
catch(ClassNotFoundException e)
{
System.err.println(e.getMessage());
}
}
public Connection getConn()
{
return conn;
}}
我是菜鸟对于hibernate一点都不知道。所以请各位大侠从基础上指点一下!
的executeUpdate方法来执行,executeUpdate_id是用来读取最大id号的,应该在增加的时候调用,至于查询则是executeQuery方法。
// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi
// Source File Name: DataBase.javapackage conn;import java.io.PrintStream;
import java.sql.Connection;
import java.sql.DriverManager;public class DataBase
{ public Connection conn; public DataBase()
{
connect();
} public boolean connect()
{
try
{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
String url = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=TeachOnline";
String user = "sa";
String password = "";
conn = DriverManager.getConnection(url, user, password);
}
catch(Exception ee)
{
System.out.println("connect db error:" + ee.getMessage());
return false;
}
return true;
}
}