java sqlserver 2000_java数据库基本操作（sqlserver 2000为例）
一、环境搭建
1、下载对应数据库连接驱动包并引入。
2、如果在web中调用必须在tomcat中也放入对应的驱动包。
3、在jre的lib\ext中也加入对应的驱动包。
二、连接数据库
public static String server = "localhost";//服务器
public static String port = "1433";//端口号
public static String dbname = "testdb";//数据库
public static String user = "sa";//用户名
public static String pwd = "12345";//用户密码
public static Connection createConnection() throws Exception{
Connection conn = null;
String url = "";
try{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
url = "jdbc:sqlserver://" + server + ":" + port + ";DatabaseName=" + dbname;
conn = DriverManager.getConnection(url,user,pwd);
}catch(SQLException sqlEx){
throw sqlEx;
}catch(Exception ex){
throw ex;
}
return conn;
}
三、基本操作
1、插入：
Connection conn = createConnection();
String sql = "insert into tmap (mapserviceid,mapid,mapname) values(?,?,?)";
PreparedStatement pstmt=conn.prepareStatement(sql);
pstmt.setString(1, "1");
pstmt.setString(2, "7");
pstmt.setString(3, "test1");
pstmt.executeUpdate();
pstmt.close();
conn.close();
2、查询
String sql = "select * from tmap";
PreparedStatement pstmt=conn.prepareStatement(sql);
ResultSet rs=pstmt.executeQuery();
while(rs.next()){
System.out.println(rs.getString("mapname"));
}
3、更新
String sql = "update tmap set mapname=? where mapid = ?";
PreparedStatement pstmt=conn.prepareStatement(sql);
pstmt.setString(1, "namename");
pstmt.setString(2, "7");
pstmt.executeUpdate();
4、删除
String sql = "delete tmap where mapid = ?";
PreparedStatement pstmt=conn.prepareStatement(sql);
pstmt.setInt(1, 7);
pstmt.executeUpdate();