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POArray list update to database
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copied!<p>I am trying to update my database using values in array list . Following is the code i am trying.</p> <pre><code>String query = "insert into login values(? , ?)"; Connection conn = null; PreparedStatement statement = null; ResultSet resultSet = null; try { conn = getConnection(); for(int i = 0;i < rowlength; i++) { System.out.println(rowList.get(i)); statement = conn.prepareStatement(query); statement.setInt(1, rowList.get(i)); statement.setString(2, rowsList.get(i+2)); resultSet = statement.executeQuery(); } } catch (SQLException e) { try { throw new ServletException("DB interaction failed", e); } catch (ServletException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } catch (Exception e) { e.printStackTrace(); } finally { if (resultSet != null) try { resultSet.close(); } catch (SQLException ignore) {} if (statement != null) try { statement.close(); } catch (SQLException ignore) {} if (conn != null) try { conn.close(); } catch (SQLException ignore) {} } </code></pre> <p>Its fetching following error in console for all values of loop.</p> <pre><code>java.lang.ClassNotFoundException: org.postgresql.Driver at org.apache.catalina.loader.WebappClassLoader.loadClass (WebappClassLoader.java:1358) at org.apache.catalina.loader.WebappClassLoader.loadClass (WebappClassLoader.java:1204) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at com.aipl.struts.action.ExcelDbAction.getConnection(ExcelDbAction.java:60) at com.aipl.struts.action.ExcelDbAction.execute(ExcelDbAction.java:126) at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58) at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67) at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190) at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304) at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190) at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:619) </code></pre> <p>Can anybody direct me in what i am doing wrong or their is another way of updating table in database.</p> <p>Thank you////</p>

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