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public class DBUtils {
private static Connection conn;
static{
try {
Class.forName("org.gjt.mm.mysql.Driver");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static Connection getConn(){
try{
if(conn==null || conn.isClosed())
conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/qhit","root","qinghuait");
}catch(Exception e){
System.out.println("DBUtils.getConn()异常:"+e);
}
return conn;
}
public static void close(Connection conn){
try {
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void close(Statement stat){
try {
stat.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void close(ResultSet rs){
try {
rs.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}