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我的錯誤是：PostgreSQL的3錯誤：無法將應用程序連接到數據庫
May 08, 2014 3:03:16 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jsp] in context with path [/Licenta] threw exception [javax.servlet.ServletException: java.lang.ClassNotFoundException: postgresql-9.3-1101.jdbc3] with root cause
java.lang.ClassNotFoundException: postgresql-9.3-1101.jdbc3
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at proiect.GetCarte.GetCarte2(GetCarte.java:23)
at org.apache.jsp.Carti_jsp._jspService(Carti_jsp.java:112)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
這裏是我的代碼。
import beans.Carte;
import com.mysql.jdbc.Statement;
public class GetCarte {
public ArrayList<Carte> GetCarte2() throws ClassNotFoundException, SQLException
{
ArrayList<Carte> carti = new ArrayList<Carte>();
// TODO Auto-generated method stub
// Class.forName("com.mysql.jdbc.Driver");
Class.forName(" postgresql-9.3-1101.jdbc3");
Connection con = DriverManager.getConnection("jdbc:postgresql://localhost:5432/inventarbiblioteca", "root", "password");
Statement st = (Statement) con.createStatement();
ResultSet rs;
Carte carte=new Carte();
rs = st.executeQuery("select * from carte");
while (rs.next()) {
int identificatorCarte=Integer.parseInt(rs.getString("identificatorCarte"));
int ISBN=Integer.parseInt(rs.getString("ISBN"));
String titlul=rs.getString("titlul");
String autori=rs.getString("autori");
String editura=rs.getString("editura");
int anAparitie=Integer.parseInt(rs.getString("anAparitie"));
int editie=Integer.parseInt(rs.getString("editie"));
int pret=Integer.parseInt(rs.getString("pret"));
int idDomeniu=Integer.parseInt(rs.getString("idDomeniu"));
String observatiiCarte=rs.getString("observatiiCarte");
carte = new Carte (identificatorCarte, ISBN, titlul, autori, editura, anAparitie, editie, pret, idDomeniu, observatiiCarte);
System.out.println("adauga carte " + carte.getTitlul());
carti.add(carte);
}
System.out.println("Titluri:");
for(Carte t : carti)
{
System.out.println(t.getTitlul());
}
return carti;
}
public ArrayList<Carte> GetSearchedCarte (String searched) throws ClassNotFoundException, SQLException
{
ArrayList<Carte> carti = new ArrayList<Carte>();
// TODO Auto-generated method stub
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/proiect", "root", "root");
Statement st = (Statement) con.createStatement();
ResultSet rs;
Carte carte=new Carte();
rs = st.executeQuery("select * from carte where titlul like '%" + searched + "%'");
while (rs.next()) {
int identificatorCarte=Integer.parseInt(rs.getString("identificatorCarte"));
int ISBN=Integer.parseInt(rs.getString("ISBN"));
String titlul=rs.getString("titlul");
String autori=rs.getString("autori");
String editura=rs.getString("editura");
int anAparitie=Integer.parseInt(rs.getString("anAparitie"));
int editie=Integer.parseInt(rs.getString("editie"));
int pret=Integer.parseInt(rs.getString("pret"));
int idDomeniu=Integer.parseInt(rs.getString("idDomeniu"));
String observatiiCarte=rs.getString("observatiiCarte");
carte = new Carte (identificatorCarte, ISBN, titlul, autori, editura, anAparitie, editie, pret, idDomeniu, observatiiCarte);
System.out.println("adauga carte " + carte.getTitlul());
carti.add(carte);
}
System.out.println("Titluri:");
for(Carte t : carti)
{
System.out.println(t.getTitlul());
}
return carti;
}
public Carte GetCarteByISBN (int isbn) throws ClassNotFoundException, SQLException
{
// TODO Auto-generated method stub
Carte t = new Carte();
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/proiect", "root", "root");
Statement st = (Statement) con.createStatement();
ResultSet rs;
Carte carte = new Carte();
rs = st.executeQuery("select * from carte where identificatorCarte=" + isbn);
if (rs.next()) {
int identificatorCarte=Integer.parseInt(rs.getString("identificatorCarte"));
int ISBN=Integer.parseInt(rs.getString("ISBN"));
String titlul=rs.getString("titlul");
String autori=rs.getString("autori");
String editura=rs.getString("editura");
int anAparitie=Integer.parseInt(rs.getString("anAparitie"));
int editie=Integer.parseInt(rs.getString("editie"));
int pret=Integer.parseInt(rs.getString("pret"));
int idDomeniu=Integer.parseInt(rs.getString("idDomeniu"));
String observatiiCarte=rs.getString("observatiiCarte");
carte = new Carte (identificatorCarte, ISBN, titlul, autori, editura, anAparitie, editie, pret, idDomeniu, observatiiCarte);
System.out.println("adauga carte " + carte.getTitlul());
}
return carte;
}
}
SO不是調試服務 –
驅動程序未加載。下載postgresql的jdbc驅動程序並將其放在類路徑中。這是鏈接http://jdbc.postgresql.org/download.html –
這樣的問題怎麼會得到upvote .. –