java连接Oracle数据库问题

五月 23, 2016 11:09:27 上午 org.apache.catalina.core.StandardWrapperValve invoke

严重: Servlet.service() for servlet [HANA.HanaInputOracle] in context with path [/JAVA_HANA] threw exception

java.lang.NullPointerException

at HANA.HanaInputOracle.doPost(HanaInputOracle.java:59)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:745)

这是报错信息，以下是相对应的java文件

package HANA;

import java.io.IOException;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.SQLException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

Servlet implementation class HanaInputOracle

*/

@WebServlet("/HanaInputOracle")

public class HanaInputOracle extends HttpServlet {

private static final long serialVersionUID = 1L;

/**

@see HttpServlet#HttpServlet()

*/

HanaInputOracle() {

super();

// TODO Auto-generated constructor stub

}

/**

@see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse

response)

*/

void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

// TODO Auto-generated method stub

}

/**

@see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse

response)

*/

void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

// TODO Auto-generated method stub

ORACLE oarcle = new ORACLE();

Connection conn = oarcle.connoracle();

PreparedStatement st = null;

USER user = (USER) request.getSession().getAttribute("zb");

String INSERT = "insert into SCM_S901 VALUES('" + user.getSPMON() + "','" + user.getSPTAG() + "','"

user.getVTWEG() + "','" + user.getMATNR() + "','" + user.getZXSJE() + "')";

//String SEC = "select * from SAPRED.S901 where SPMON='201506'";

{

// st.executeUpdate(SEC);

st.executeUpdate(INSERT);

response.sendRedirect("../result.jsp");

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

response.sendRedirect("../error.jsp");

}

}

}

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