jsp jstl servlet（數據庫表有兩行但jsp顯示最後一行兩次）

問題：數據庫表有兩行。但是，當我顯示在jsp它顯示最後一行兩次，而不是每個單獨的行..請幫助！jsp jstl servlet（數據庫表有兩行但jsp顯示最後一行兩次）

DAO命名CompanyDB有這個方法

public List viewPostedJobs(){ 
     ArrayList<PostJob> viewList = new ArrayList<PostJob>(); 
     PostJob p = new PostJob(); 
     String sql="select * from postjob"; 

     try{ 
      connection=getConnection(); 
      s=connection.createStatement();   
      rs=s.executeQuery(sql); 

      while(rs.next()){ 
       p.setLocation(rs.getString("location")); 
       p.setSkills(rs.getString("skills")); 
       p.setField(rs.getString("field")); 
       p.setDescription(rs.getString("description"));    
       p.setEmail(rs.getString("email")); 
       p.setCompanyName(rs.getString("companyName")); 
       p.setQualification(rs.getString("qualification")); 

       viewList.add(p); 
      } 

     }catch(Exception asd){ 
      System.out.println(asd.getMessage()); 
     } 

     /*catch (SQLException ex) { 
      Logger.getLogger(CompanyDB.class.getName()).log(Level.SEVERE, null, ex); 
     } */  

     return viewList; 
    } 
}

MY JSP頁面看起來像這樣

<%@include file="head.html" %> 
<%@page import="Model.PostJob" %> 
<%@page contentType="text/html" pageEncoding="UTF-8"%> 
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 
<!DOCTYPE html> 
<html> 
    <head> 
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
     <title>JSP Page</title> 
    </head> 
    <body> 

     <div class="profile"> 
<div style="top: 233px; left: 172px;" class="sidebar2"> 

    <form class="center"> <input class="form-submit-button" value="Company Profile" type="submit"> </form> 
    <br> 
    <form class="center" action="post_job.html"> <input class="form-submit-button" value="Post New Job" type="submit"> </form> 
    <br> 
    <form class="center" action="view_posted_job.html"> <input class="form-submit-button" value="View Posted Job" type="submit"> </form> 
    <br> 
    <form class="center"> <input class="form-submit-button" value="Check Mail" type="submit"> </form> 
    <br>  
    <form class="center" action="change_pass.html"> <input class="form-submit-button" value="Change Password" type="submit"> </form> 
    <br> 
    <form class="center"> <input class="form-submit-button" value="Logout" type="submit"> </form> 
    <br> 
</div> 
<div class="jumbotron2"> 
    <h2 align="center">Posted Jobs</h2> 
    <p> 
    <div> 
    <table border="5px" align="center"> 
     <tr> 
     <th>Location</th> 
      <th>Skills</th> 
      <th>Field</th> 
      <th>Description</th> 
      <th>Email</th> 
      <th>Company</th> 
      <th>Qualification</th> 

     </tr>     

      <c:forEach items="${PostJob}" var="p" varStatus="varCounter"> 
      <tr><td><c:out value="${p.location}" /></td> 
      <td><c:out value="${p.skills}" /></td> 
      <td><c:out value="${p.field}" /></td> 
      <td><c:out value="${p.description}" /></td> 
      <td><c:out value="${p.email}" /></td> 
      <td><c:out value="${p.companyName}" /></td> 
      <td><c:out value="${p.qualification}" /></td></tr>   
     </c:forEach> 
    </table> 


    </div> 
    </p> 
</div> 
</div> 
    </body> 
</html> 
<%@include file="foot.html" %>

我的servlet

public class viewJobServlet extends HttpServlet { 


    protected void processRequest(HttpServletRequest request, HttpServletResponse response) 
      throws ServletException, IOException { 
     response.setContentType("text/html;charset=UTF-8"); 

     PrintWriter out = response.getWriter();     

     try{ 
      List<PostJob> viewJob=new ArrayList<PostJob>(); 
      CompanyDB cdb = new CompanyDB(); 
      viewJob = cdb.viewPostedJobs(); 
      request.setAttribute("PostJob", viewJob); 
      //response.sendRedirect("viewPostedJobs.jsp"); 
      RequestDispatcher view=request.getRequestDispatcher("viewPostedJobs.jsp"); 
      if(view !=null){ 
       view.forward(request, response); 
      } 
     }finally{ 
      out.close(); 
     }

來源

2014-11-02 Deepak Omase

你只是建立一個PostJob例如，並添加這個獨特的實例會在集合中多次執行，並在每次迭代中更改其值。撥打new PostJob()應在每次迭代中進行：

while(rs.next()){ 
    PostJob p = new PostJob(); 
    ... 
    viewList.add(p); 
}

來源

2014-11-02 20:27:50

謝謝！我花了幾個小時弄清楚了這一點！再次感謝 – 2014-11-02 20:34:39

jsp jstl servlet（數據庫表有兩行但jsp顯示最後一行兩次）

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