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Thread: Can't print actual values “request.getparameterValues” in JSP

  1. #1
    Junior Member
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    Angry Can't print actual values “request.getparameterValues” in JSP

    When I'm Dispatching a JSP page through Servlet by the following code:

    String[] UserList = ViewAllUserBasedOnRights(UserViewBy);
    request.getRequestDispatcher("/test/TestGetParameterValues.jsp?UserList="+UserList+"") .forward(request, response);

    And the JSP page shows "**[Ljava.lang.String;@8b3f2a**".

    Details:

    //View users based on user roles
    public static String[] ViewAllUserBasedOnRights(String UserName) throws Exception{
    String[] retVal = null;
    Connection con=null;
    try{
    con= DatabaseConnectionManager.getDatabaseConnectionMan ager().getConnection(DatabaseConnectionManager.EAG RO_APP_DB);
    con.setAutoCommit(false);
    Statement stmt = (Statement) con.createStatement();
    Statement stmt1 = (Statement) con.createStatement();
    String SQLStringCount = "SELECT COUNT AS COUNT FROM MASTER_USER_DATA WHERE " +
    " USER_NAME NOT IN(SELECT A.USER_NAME FROM USER_TO_ROLE_MAPPING A, MASTER_ROLE_DATA B WHERE "+
    " A.ROLE_NAME = B.ROLE_NAME AND A.ROLE_IDENTIFIER = B.ROLE_IDENTIFIER AND "+
    " B.ROLE_PRIORITY < (SELECT MIN(B.ROLE_PRIORITY) FROM "+
    " USER_TO_ROLE_MAPPING A, MASTER_ROLE_DATA B WHERE "+
    " A.ROLE_NAME = B.ROLE_NAME AND A.ROLE_IDENTIFIER = B.ROLE_IDENTIFIER AND "+
    " A.USER_NAME = '"+UserName+"'))";
    try(ResultSet rs = stmt.executeQuery(SQLStringCount)){
    int count = -1;
    while(rs.next()){
    count = Integer.parseInt(rs.getString("COUNT"));
    }
    if(count > 0){
    String SQLString = "SELECT USER_NAME FROM MASTER_USER_DATA WHERE "+
    " USER_NAME NOT IN(SELECT A.USER_NAME FROM "+
    " USER_TO_ROLE_MAPPING A, MASTER_ROLE_DATA B WHERE "+
    " A.ROLE_NAME = B.ROLE_NAME AND A.ROLE_IDENTIFIER = B.ROLE_IDENTIFIER AND "+
    " B.ROLE_PRIORITY < (SELECT MIN(B.ROLE_PRIORITY) FROM "+
    " USER_TO_ROLE_MAPPING A, MASTER_ROLE_DATA B WHERE "+
    " A.ROLE_NAME = B.ROLE_NAME AND A.ROLE_IDENTIFIER = B.ROLE_IDENTIFIER AND "+
    " A.USER_NAME = '"+UserName+"') ORDER BY USER_NAME ASC)";

    System.out.println("SQLString: "+SQLString);
    try(ResultSet rs1 = stmt1.executeQuery(SQLString)){
    ArrayList<String> stringList = new ArrayList<String>();
    while(rs1.next()){
    stringList.add(rs1.getString("USER_NAME"));
    }
    String[] temp = new String[stringList.size()];
    retVal = (String[]) stringList.toArray(temp);
    con.commit();
    rs1.close();

    }catch(SQLException e){
    try{
    if(con!=null)
    extracted(con);
    }catch(Exception ex){}
    }
    }
    }catch(SQLException e){
    try{
    if(con!=null)
    extracted(con);
    }catch(Exception ex){}
    }

    }catch(SQLException e){
    try{
    if(con!=null)
    extracted(con);
    }catch(Exception ex){}
    }
    return retVal;
    }


    Code of my JSP page:

    <table style="border:1px solid black;bor

    der-collapse:collapse;" width="100%">
    <tr>
    <th style="border:1px solid black;" align="center" width="15%">Serial no.</th>
    <th style="border:1px solid black;" align="center" width="70%">User Name as email</th>
    </tr>
    <%
    String[] UserList;
    UserList = (String[])request.getParameterValues("UserList");
    for(int i = 0; i < UserList.length; i++){
    %>
    <tr>
    <td style="border:1px solid black;" align="center"><%=i+1%>
    </td>

    <td style="border:1px solid black;" align="left" ><%=UserList[i]%>
    </td>
    </tr>
    <% } %>
    </table>


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Can't print actual values “request.getparameterValues” in JSP

    And the JSP page shows "**[Ljava.lang.String;@8b3f2a
    That is from the toString() method for a String array. If you want to format the contents of the String array for viewing use the Arrays class's toString() method.
    If you don't understand my answer, don't ignore it, ask a question.

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