求：用Java连接数据库和简单的数据库操作代码

求：用Java连接数据库和简单的数据库操作代码

以上的代码都不如哥的 且看哥是怎么写条理清晰的代码的！！！
package dbconnection //java 中不存在没有包的类(讲解详细因为项目需要）
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;//引入sql数据库包

public class DBConnection{
private Connection conn=null;
private Statement stmt=null;
private Result rs=null;
private String jdbc="com.microsoft.sqlserver.jdbc.SQLServerDriver";
private String driverManager="jdbc:sqlserver://localhost:1433;databasename=HcitPos";
private String user="admin";
private int password="admin";

public DBConnection{
try{
Class.forName("jdbc");
conn.getConnection("driverManager");
}
catch(Exception e){}
}
public selectMethod(String sql){
stmt=conn.createStatement();
rs=stmt.extcuteQuery("sql");
while(rs.next()){
String title=rs.getString("title");//利用javaBean获得数据库中的属性
String name=rs.getString("name");
.......
System.out.println("title");
System.out.println("name");
......
//当然数据库的操作有很多 这里简单介绍下功能的实现
}
}
public void closeDB(){
if(rs != null) rs.close();
if(stmt != null) stmt.close();
if(conn != null) conn.close();

}
}2009-10-15

package common;

import java.sql.*;

public class DBConnect {
private Connection conn = null;
private Statement stmt = null;
private ResultSet rs = null;
private PreparedStatement ps = null;

public DBConnect()
{
try
{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databasename=HcitPos", "sa", "123456");
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
}
catch (SQLException ex)
{
System.out.println(ex.getMessage() + "路径错误");
}
catch (ClassNotFoundException ex)
{
System.out.println(ex.getMessage() + "驱动错误");
}
}

public PreparedStatement getPs(String sql) throws SQLException {
try {
ps = conn.prepareStatement(sql);
conn.commit();
return ps;
} catch (Exception e) {
//conn.rollback();
e.printStackTrace();
return ps;
}
}
public ResultSet executeQuery(String ssql) throws SQLException{
try{
rs = stmt.executeQuery(ssql);
return rs;

}
catch(SQLException se){
//conn.rollback();
System.out.println("DBBean.executeQuery() ERROR:"+se.getMessage());
}
return rs;
}
public int executeUpdate(String ssql) throws SQLException{
int iupdate = 0;
try{
iupdate = stmt.executeUpdate(ssql);
return iupdate;
}
catch(SQLException se){
//conn.rollback();
System.out.println("DBBean.executeUpdate() ERROR:"+se.getMessage());
}
return iupdate;
}
public void free() throws SQLException{
try{
if(rs != null) rs.close();
if(stmt != null) stmt.close();
if(conn != null) conn.close();
}
catch(SQLException se){
System.out.println("DBBean.free() ERROR:"+se.getMessage());
}
}
}
这里用的是直连，要导入一下驱动包就可用了2009-10-15

一楼的是桥连 我这是jdbc直连 需要加2005的驱动程序
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection connection =DriverManager.getConnection(url,username,password);
Statement statement=connection.createStatement();
ResultSet resultset=statement.executeQuery("select * from students ");

while(resultset.next()){
String admin=resultset.getString("admin");

String name=resultset.getString("name");
String age=resultset.getString("age");
String grade=resultset.getString("grade");
String magor=resultset.getString("magor");
String dept=resultset.getString("dept");
}2009-10-15

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class Example
{
public static void main(String[] args)throws
SQLExcetion,ClassNotFoundExcetion
{
Class.forName("sun.jdbc.odbc.jdbcOdbcDrice");
Connetion con=DriverManager.getConnection ("jdbc:odbc:javatest","","");
Statement stmt=con.createStatement();
String sql="create table math(整数 int,平方 int,平方根 float，正弦 float)";
stmt.executeUpdate(sql);
}
}2009-10-15

最近项目写这个写的快吐血了。。。随便看了下
啦啦·爱琴海 这个写的和我的查不多。。。
其实也就那么几条语句。2009-10-15