以下代码用于从MySQL数据库中获取 PONo ,并在按钮中查看它们。
当用户点击(PONO查看)按钮时,会出现另一个页面以查看该特定PONo的采购订单信息。(viewpo.jsp)
但是在截图中我点击104显示102采购订单详细信息。当我点击102显示102采购订单详细信息。 如何解决此错误?
<%
String CONN_STRING = "jdbc:mysql://localhost/pmsdb";
String USERNAME = "dbuser";
String PASSWORD = "dbpassword";
Connection conn=null;
PreparedStatement pst=null;
ResultSet rs =null;
ResultSet rs2 =null;
ResultSet rs3 =null;
Statement stmt=null;
Statement stmt2=null;
Object userr = session.getValue("Username");
String user = userr.toString();
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(CONN_STRING, USERNAME, PASSWORD);
String sql0="SELECT * FROM websupplierinfo WHERE username='"+user+"'";
pst=conn.prepareStatement(sql0);
rs3=pst.executeQuery();
if(rs3.next()){
String companyname = rs3.getString("Company");
String sql = "SELECT * FROM purchaseorderinfo WHERE Supplier='"+companyname+"' ORDER BY PONo DESC";
// String sql2 = "SELECT * FROM itemspoinfo WHERE Company='"+companyname+"' ORDER BY PONo DESC";
stmt = conn.createStatement();
rs=stmt.executeQuery(sql);
//stmt2=conn.createStatement();
// rs2=stmt2.executeQuery(sql2);
%>
<div class="row">
<div class="col-md-12">
<div class="citydetails">
<div class="panel panel-primary">
<div class="panel-heading">Available Purchase Orders</div>
<div class="panel-body">
<table class="table">
<tr>
<th>All Purchase Orders</th>
</tr>
<tr><td><form>
<div class="form-group">
<div class="row">
<div class="col-sm-6 center-block">
<input type="button" name="view" id="view" tabindex="1" class="form-control btn btn-login" value="All Purchase Orders" onclick="window.open('alladminpo.jsp','_blank','resizable=yes')">
</div>
</div>
</div>
</form></td>
</tr>
<th>Latest Purchase Order Numbers</th>
<%while(rs.next()){ %>
<tr>
<td>
<form>
<div class="form-group">
<div class="row">
<div class="col-sm-2 center-block">
<input type="button" name="view" id="view" tabindex="1" class="form-control btn btn-login" value="<%=rs.getString("PONo")%>" onclick="window.open('viewpo.jsp','_blank','resizable=yes')">
<%
String po = rs.getString("PONo");
session.putValue("PONo", po);
%>
</div>
</div>
</div>
</form>
<% }}%>
</td>
</tr>
</table>
</div>
</div>
</div>
</div>
</div>
viewpo.jsp(重要的代码段);
<%
String CONN_STRING = "jdbc:mysql://localhost/pmsdb";
String USERNAME = "dbuser";
String PASSWORD = "dbpassword";
Connection conn=null;
ResultSet rs =null;
ResultSet rs2 =null;
Statement stmt=null;
Statement stmt2=null;
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(CONN_STRING, USERNAME, PASSWORD);
Object po = session.getValue("PONo");
String pno=po.toString();
String sql = "SELECT * FROM purchaseorderinfo WHERE PONo='"+pno+"'";
String sql2 ="SELECT * FROM itemspoinfo WHERE PONo='"+pno+"'";
stmt = conn.createStatement();
rs=stmt.executeQuery(sql);
stmt2=conn.createStatement();
rs2=stmt2.executeQuery(sql2);
%>
<div class="row">
<div class="col-md-12">
<div class="citydetails">
<div class="panel panel-primary">
<div class="panel-heading">Purchase Order Details</div>
<div class="panel-body">
<table class="table">
<thead>
<tr>
<th>Purchase Order <%=session.getValue("PONo") %></th>
</tr>
</thead>
<tbody>
<tr>
<td>
<% if(rs.next()){ %>
Purchase Order Date : <%= rs.getString("PODate") %><br>
Expected Date : <%=rs.getString("ExpectedDate") %> <br>
<% } %>
<table class="table">
<tbody>
<tr>
<th>Items</th>
<th>Quantity</th>
</tr>
<% if (rs2.next()){ %>
<tr>
<td><%=rs2.getString("ItemName")%></td>
<td><%=rs2.getString("Qty")%></td>
</tr>
<% } %>
答案 0 :(得分:1)
您正在替换PONo
中的session
值,它只保留最后一个值。
因此,将PONo
值作为request
参数传递给viewpo.jsp
。
<input type="button" name="view" id="view" tabindex="1" class="form-control btn btn-login" value="<%=rs.getString("PONo")%>" onclick="window.open('viewpo.jsp?PONo=<%=rs.getString("PONo")%>','_blank','resizable=yes')">
并删除jsp中的以下代码,因为它替换了PONo的值。
<%
String po = rs.getString("PONo");
session.putValue("PONo", po);
%>
在viewpo.jsp
中,我们可以访问PONo
,如下所示:
String pno=request.getParameter('PONo');
无论您在哪里使用request.getParameter("PONo")
,都必须session.getValue("PONo");
。
答案 1 :(得分:1)
在使用
的while循环中 String po = rs.getString("PONo");
session.putValue("PONo", po);
以上语句和设置属性PONo具有最新值,将为每个值重写。所以每次你都会得到从db中获取的最后一个值。 您必须设置您单击的值。