我无法从DB中检索值。请仔细阅读代码并指导我解决问题
public ArrayList getReqResInfo(String id)
{
String methodname="createConnection";
Connection conn = null;
ResultSet rs=null;
PreparedStatement psmt;
int req_id=0;
String reqid=id;
ArrayList resList=new ArrayList();
try {
conn = DBConnection.getJNDIConnection();
System.out.println("getReqResInfo id=="+reqid);
psmt= conn.prepareStatement("select * from CR_REQUEST_RESOURCE_INFO where REQUEST_ID=?");
psmt.setInt(1,Integer.parseInt(id));
rs= psmt.executeQuery();
System.out.println("getReqResInfo");
while(rs.next())
{
System.out.println(rs.getString("RES_LEVEL") +" " + rs.getString("NOOF_RES") +" " + rs.getString("RES_PRIMARY_SKILL") +" " + rs.getString("RES_QUALIFICATION") +" " + rs.getString("RES_SECONDARY_SKILL") +" " + rs.getString("RES_EXP"));
ReqResourceVO resourceVO=new ReqResourceVO();
resourceVO.setLevel(rs.getString("RES_LEVEL"));
resourceVO.setNumres(rs.getString("NOOF_RES"));
resourceVO.setPrimary(rs.getString("RES_PRIMARY_SKILL"));
resourceVO.setQualification(rs.getString("RES_QUALIFICATION"));
resourceVO.setSecondary(rs.getString("RES_SECONDARY_SKILL"));
resourceVO.setYear(rs.getString("RES_EXP"));
resList.add(resourceVO);
}
}
catch(Exception e)
{
e.printStackTrace();
}
finally
{
try {
conn.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
return resList;
}
在servlet中，我正在调用此函数，如下所述
if(action.equals("view"))
{
try
{
String reqid=req.getParameter("id");
System.out.println("id "+reqid);
ReqProjVO reqProjVO=new ReqProjVO();
reqProjVO.setRequestid(reqid);
ReqResDAO reqresDAO=new ReqResDAO();
reqProjVO=reqresDAO.getReqProjInfo(reqProjVO);
ArrayList resVOList=reqresDAO.getReqResInfo(reqid);
req.setAttribute("projVO", reqProjVO);
HttpSession session = req.getSession(true);
session.setAttribute("resVOList", resVOList);
ReqProjDAO reqprojDAO=new ReqProjDAO();
ArrayList projList=reqprojDAO.Project();
req.setAttribute("projList", projList);
System.out.println("in request resource servlet");
RequestDispatcher rd= req.getRequestDispatcher("jsp/manager/RequestforResource.jsp");
rd.forward(req,res);
System.out.println("in request resource servlet");
}
catch(Exception e)
{
e.printStackTrace();
}
}
正在从数据库中获取值并将其打印在控制台上，但它不会转发到相关的JSP页面，而是转到JSP页面中的日志，我收到了这个巨大的错误。我不知道该怎么做......
java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at weblogic.utils.io.ChunkedOutputStream.writeTo(ChunkedOutputStream.java:193)
at weblogic.servlet.internal.ResponseHeaders.writeHeaders(ResponseHeaders.java:434)
at weblogic.servlet.internal.ServletResponseImpl.writeHeaders (ServletResponseImpl.java:1256)
at weblogic.servlet.internal.ServletOutputStreamImpl.sendHeaders(Servlet OutputStreamImpl.java:244)
at weblogic.servlet.internal.ChunkOutput.flush(ChunkOutput.java:379)
at weblogic.servlet.internal.ChunkOutput.checkForFlush(ChunkOutput.java:469)
at weblogic.servlet.internal.ChunkOutput.write(ChunkOutput.java:304)
at weblogic.servlet.internal.ChunkOutputWrapper.write(ChunkOutputWrapper.java:139)
at weblogic.servlet.jsp.JspWriterImpl.write(JspWriterImpl.java:274)
at jsp_servlet._jsp._manager.__requestforresource._jspService(__requestforresource.java:237)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run (StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:408)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:318)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:505)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:251)
at manager.RequestResourceServlet.doPost(RequestResourceServlet.java:181)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3498)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
答案 0 :(得分：3)
您向我们展示的方法（getReqResInfo()）未显示在堆栈跟踪中。堆栈跟踪中唯一出现在您自己的代码中的部分是manager.RequestResourceServlet.doPost()，因此可能存在问题。如果你能在RequestResourceServlet.java:181中找到问题，那就太棒了！否则，请提供更多代码。
为您提供额外的帮助建议：
您的方法返回ArrayList。最好指定接口类型List（最佳实践：程序到接口而不是具体类型，以便以后可以轻松更改）。另请注意，List是通用的。您应指定列表是ReqResourceVO的列表，因此请写List<ReqResourceVO>。使用泛型意味着您的集合是类型安全的，以后不需要额外的渲染。
很高兴看到你知道如何使用finally来关闭最后的连接，但是不要忘记关闭结果集和语句。 ：）
答案 1 :(得分：3)
当客户端发出请求时，在收到完整响应之前，会发生以下任一情况：
答案 2 :(得分：0)
在req.getRequestDispatcher中调用我的兴趣点到jsp页面的路径。您是否应该尝试使用斜杠/像我发现的许多示例一样开始？所以它启动/ jsp /而不是普通的jsp /