Servlet connection database and date format conversion

Package Oraclefactory;import Java.io.ioexception;import java.io.printwriter;import java.sql.connection;import Java.sql.drivermanager;import Java.sql.resultset;import Java.sql.sqlexception;import Java.sql.Statement;import Java.text.simpledateformat;import Java.util.calendar;import Javax.servlet.servletexception;import Javax.servlet.http.httpservlet;import Javax.servlet.http.httpservletrequest;import Javax.servlet.http.HttpServletResponse; Public classTESTWX extends httpservlet{PrivateString URL; PrivateString User; PrivateString password; PrivateString Driverclass;  Public voidinit () throws Servletexception {Driverclass="Oracle.jdbc.driver.OracleDriver"; Try{class.forname (driverclass); } Catch(ClassNotFoundException E1) {//TODO auto-generated Catch blockE1.printstacktrace (); } URL="Jdbc:oracle:thin: @IP: 1521:sas"; User="XXX"; Password="XXX"; }         Public voiddoget (HttpServletRequest req,httpservletresponse resp) throws ioexception,servletexception{Conne Ction Conn=NULL; Statement stmt=NULL; ResultSet RS=NULL; Req.setcharacterencoding ("gb2312"); Resp.setcontenttype ("text/html;charset=gb2312"); PrintWriter out=Resp.getwriter (); Calendar Calendar=calendar.getinstance (); SimpleDateFormat SD1=NewSimpleDateFormat ("YYYY-MM-DD 00:00:00"); SimpleDateFormat SD2=NewSimpleDateFormat ("YYYY-MM-DD 23:59:59"); String Today=Sd2.format (Calendar.gettime ()); Calendar.add (Calendar.date,-7); String Lastmon=Sd1.format (Calendar.gettime ()); System. out. println (Lastmon); System. out. println (today); Try{conn=drivermanager.getconnection (URL, user, password); stmt=conn.createstatement (); String SQL="SELECT * from Wx_run_user a,wx_run_user_state b where a.openid=b.wx_user_id and a.sex=2 and a.last_mod_time between 
    "+"to_date ('"+lastmon+"' , ' yyyy-mm-dd HH24:Mi:ss ') and To_date ('"+today+"' , ' yyyy-mm-dd HH24:Mi:ss ')"; System. out. println (SQL); RS=stmt.executequery (SQL);  out. println ("");  out. println ("<table border=1 align=center><caption> interface Information </caption>");  out. println ("<tr><th>openid</th><th> nickname </th><th> Avatar Address </th><th> binding mode </th ><th> binding number </th><th> creation time </th><th> Last modified time </th><th> account status </th>< /tr>");  while(Rs.next ()) { out. println ("<tr>");  out. println ("<td>"+rs.getstring ("OpenID")+"</td>");  out. println ("<td>"+rs.getstring ("Nickname")+"</td>");  out. println ("<td>"+rs.getstring ("Headimgurl")+"\ "Width=300/></td>"); String Bind_type=rs.getstring ("Bind_type"); intby =integer.valueof (Bind_type). Intvalue (); Switch(by) { Case 0: Bind_type="Phone number";  Break;  Case 1: Bind_type="fixed";  Break; default: Bind_type="Broadband Account";  Break; }                 out. println ("<td>"+bind_type+"</td>");  out. println ("<td>"+rs.getstring ("NBR")+"</td>");  out. println ("<td>"+rs.getstring ("Create_time")+"</td>");  out. println ("<td>"+rs.getstring ("Last_mod_time")+"</td>"); String Acc_status= Rs.getstring ("Acc_status"); intStatus =integer.valueof (acc_status). Intvalue (); Switch(status) { Case 0: Bind_type="Cancel your attention";  Break;  Case 2: Bind_type="attention and binding";  Break; default: Bind_type="Focus on Unbound";  Break; }                 out. println ("<td>"+bind_type+"</td>");  out. println ("</tr>"); }             out. println ("</tr></table></body>");  out. println ("Success");  out. Close ();            Stmt.close ();                    Conn.close (); } Catch(SQLException e) {//TODO auto-generated Catch blockE.printstacktrace (); }                    }}

Servlet connection database and date format conversion