求java与数据库连接实例，越详细越好!数据库是sqlserver2000。

public

class

www

{

public

static

void

main(String[]args)

throws

Exception

{

//第一步:加载驱动(驱动jar包必须加入classpath中)

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver")

//第二步:建立连接(根据实际情况替换数据库的主机地址、端口号、数据库明、登录名、密码)

Connection

conn

=

DriverManager.getConnection("jdbc:sqlserver://localhost:1433databaseName=shijiuban1",

"sa",

"111111")

System.out.println("当前连接到的数据库="+conn.getCatalog())//查看当前连接到的数据库名

//第三步:创建Statement对象

Statement

stmt

=

conn.createStatement()//只读的结果集

//Statement

stmt2

=

conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,

ResultSet.CONCUR_UPDATABLE)//可更新的结果集

//第四步:执行 *** 作(增删改查)

ResultSet

rs

=

stmt.executeQuery("select

*

from

stt")

//处理结果

while(rs.next()){

System.out.println(rs.getString("1"))

}

//第五步:关闭连接

conn.close()

}

}

ConnectionManager.java

import java.sql.*

public class ConnectionManager {

private static final String DRIVER_CLASS="com.microsoft.sqlserver.jdbc.SQLServerDriver"

private static final String DATABASE_URL="jdbc:sqlserver://localhost:1433DatabaseName=student"

private static final String DATABASE_USER="xz"

private static final String DATABASE_PASSWORD="test"

private ConnectionManager()

{}

/**

* 返回连接

* @return Connection

* @throws DBAccessException

*/

public static Connection getConnection()

{

Connection dbConnection=null

try {

Class.forName(DRIVER_CLASS)

dbConnection=DriverManager.getConnection(DATABASE_URL,DATABASE_USER,DATABASE_PASSWORD)

} catch (ClassNotFoundException e1) {

// TODO Auto-generated catch block

e1.printStackTrace()

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace()

}

return dbConnection

}

/**

* 关闭连接

* @param conn

* Connection

*/

public static void closeConnection(Connection conn)

{

try{

if(conn!=null &&!conn.isClosed())

{

conn.close()

conn=null

}

}catch(Exception ex)

{

System.out.println(ex.getMessage())

}

}

/**

* 关闭结果集

* @param rs

* ResultSet

*/

public static void closeResultSet(ResultSet rs)

{

try{

if(rs!=null)

{

rs.close()

rs=null

}

}catch(Exception ex)

{

System.out.println(ex.getMessage())

}

}

/**

* 关闭SQL预处理语句

* @param pstmt

* PreparedStatement

*/

public static void closePreparedStatement(PreparedStatement pstmt)

{

try{

if(pstmt!=null)

{

pstmt.close()

pstmt=null

}

}catch(Exception ex)

{

System.out.println(ex.getMessage())

}

}

/**

* 关闭SQL语句

* @param stmt

* Statement

*/

public static void closeStatement(Statement stmt)

{

try{

if(stmt!=null)

{

stmt.close()

stmt=null

}

}catch(Exception ex)

{

System.out.println(ex.getMessage())

}

}

public static void main(String[]args)

{

try {

Connection con=ConnectionManager.getConnection()

if(!con.isClosed())

System.out.println("数据库连接成功。。。。。")

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace()

}

}

}

User.javapublic class User {

private String username

private String userpass

public String getUsername() {

return username

}

public void setUsername(String username) {

this.username = username

}

public String getUserpass() {

return userpass

}

public void setUserpass(String userpass) {

this.userpass = userpass

}

}

UserDAO.javaimport java.util.*

import java.sql.*

public class UserDAO {

public List<User>getAllUser()

{

Connection conn=null

PreparedStatement pstmt=null

ResultSet rs=null

List<User>userList=new ArrayList<User>()

String sql="select UserName,UserPas from Users"

try {

conn=ConnectionManager.getConnection()

pstmt=conn.prepareStatement(sql)

rs=pstmt.executeQuery()

while(rs.next())

{

User u=new User()

u.setUsername(rs.getString("UserName"))

u.setUserpass(rs.getString("UserPas"))

userList.add(u)

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace()

}finally

{

ConnectionManager.closeConnection(conn)

ConnectionManager.closePreparedStatement(pstmt)

ConnectionManager.closeResultSet(rs)

}

return userList

}

}

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