java操作sql server数据添加，修改，删除记录

java操作sql server数据添加，修改，删除记录



package e20_05;

import java.sql.*;

public class Renewal {
static Connection con;
static PreparedStatement sql;
static ResultSet res;
public Connection getConnection(){
try{
Class.forName("net.sourceforge.jtds.jdbc.Driver"); //数据库驱动加载
//数据库驱动加载方法：http://blog.csdn.net/txwtech/article/details/62245346
System.out.println("数据库驱动加载成功");
con=DriverManager.getConnection("jdbc:jtds:"+
"sqlserver://localhost:1433/db_jdbc","sa","123456");//数据库连接，sa是登录名，后面的是数字是密码，db_jdbc是数据库名字
System.out.println("数据库连接成功");
}catch(Exception e){
e.printStackTrace();
}
return con;
}
public static void main(String[] args){
Renewal c=new Renewal();
con=c.getConnection();
try{

sql=con.prepareStatement("select * from tb_stu");
//sql.setInt(1,101);
res=sql.executeQuery();
System.out.println("执行增加，修改，删除前数据---row data");

while(res.next()){
//String id=res.getString("id");
String id=res.getString(1); //p366 详解
String name=res.getString("name");
String sex=res.getString("sex");
String birthday=res.getString("birthday");
System.out.print("编号:"+id);
System.out.print(" 姓名:"+name);
System.out.print(" 性别："+sex);
System.out.println(" 生日:"+birthday); //。。。。。。。。
}
sql=con.prepareStatement("insert into tb_stu"
+" values(?,?,?,?)"); //报错“列名或所提供值的数目与表定义不匹配。”，数据库中定义了4列，value后面的问号个数就应该是4个

sql.setString(1, "66");
sql.setString(2,"张一");
sql.setString(3, "m");
sql.setString(4, "2008-12-1");
sql.executeUpdate();

sql=con.prepareStatement("select *from tb_stu");
res=sql.executeQuery();
System.out.println("执行增加，修改，删除前数据---new data");

while(res.next()){
String id=res.getString(1); //p366 详解
String name=res.getString("name");
String sex=res.getString("sex");
String birthday=res.getString("birthday");
System.out.print("编号:"+id);
System.out.print(" 姓名:"+name);
System.out.print(" 性别："+sex);
System.out.println(" 生日:"+birthday); //。。。

}

sql=con.prepareStatement("update tb_stu set birthday "
+"= ? where id=(select min(id) from tb_stu)");
sql.setString(1, "2007-12-1");
sql.executeUpdate();

sql=con.prepareStatement("select *from tb_stu");
res=sql.executeQuery();
System.out.println("执行增加，修改，删除后的数据---changed birthday data");
while(res.next()){
String id=res.getString(1); //p366 详解
String name=res.getString("name");
String sex=res.getString("sex");
String birthday=res.getString("birthday");
System.out.print("编号:"+id);
System.out.print(" 姓名:"+name);
System.out.print(" 性别："+sex);
System.out.println(" 生日:"+birthday); //。。。

}

Statement stmt=con.createStatement();
stmt.executeUpdate("delete from tb_stu where id=" //...delete
+"(select min(id) from tb_stu)");
// sql.setInt(1, 1);
// sql.executeUpdate();

//show data

sql=con.prepareStatement("select *from tb_stu");
res=sql.executeQuery();
System.out.println("执行增加，修改，删除后的数据---after deleted data");
while(res.next()){
String id=res.getString(1); //p366 详解
String name=res.getString("name");
String sex=res.getString("sex");
String birthday=res.getString("birthday");
System.out.print("编号:"+id);
System.out.print(" 姓名:"+name);
System.out.print(" 性别："+sex);
System.out.println(" 生日:"+birthday); //。。。

}

}catch(Exception e){
e.printStackTrace();
}
}
}