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POUnable to get result after Inner Join 3 tables
 

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    <p>I have declare a <code>List&lt;Object[]&gt;</code> which returning list of object array, where each array represents a row in result. And index of values are based on your select statement.</p> <pre><code>productList = (List&lt;Object[]&gt;) session.createSQLQuery(" SELECT User.username, User.email, Orders.p_id, Orders.o_id, Product.listed_price " + "FROM Orders " + "INNER JOIN User ON User.u_id = Orders.u_id " + "INNER JOIN Product ON Product.p_id = Orders.p_id " + "WHERE Product.p_id = '"+p_id +"' " + "ORDER BY User.username").list(); </code></pre> <p>I have 3 tables <strong>User, Product and Orders</strong>.</p> <pre><code>USER: -----+-----------+------------+---------+----------+-----------+ u_id | username | password | contact | email | city | ------+-----------+------------+---------+---------+-----------+ PRODUCT: +------+----------+--------------+------+--------------+ | p_id | category | listed_price | qty | description | +------+----------+--------------+------+--------------+ ORDERS: +------+--------+------+------+-----------+ | o_id | date | u_id | p_Id | order_qty | +------+--------+------+------+-----------+ </code></pre> <p>I wants to Inner joins User table with Product along with o_id (from ORDER) in below order:</p> <pre><code>+-----------+-------+------+------+--------------+ | username | email | p_id | o_id | listed_price | +-----------+-------+------+------+--------------+ </code></pre> <p>In my ActionClass/View class i declare <code>public List&lt;Object[]&gt; productList;</code> to access object list from controller class above. </p> <pre><code>public List&lt;Object[]&gt; productList; public String listAllProduct(){ HttpServletRequest request = (HttpServletRequest) ActionContext.getContext().get(ServletActionContext.HTTP_REQUEST); productList = orderDaoFactory.listProduct(Integer.parseInt( request.getParameter("p_id"))); System.out.println("\t"+productList.get(0).toString()); return SUCCESS; } </code></pre> <p>In my JSP page i'm using this list (array of object) productList as an Iterator tag to iterate all customers who have ordered that product.</p> <pre><code>&lt;s:iterator value="productList"&gt; &lt;tr&gt; &lt;td&gt;&lt;h4&gt;&lt;s:property value="username"/&gt;&lt;/h4&gt;&lt;/td&gt; &lt;td&gt;&lt;h4&gt;&lt;s:property value="email"/&gt;&lt;/h4&gt;&lt;/td&gt; &lt;td&gt;&lt;h4&gt;&lt;s:property value="p_id"/&gt;&lt;/h4&gt;&lt;/td&gt; &lt;td&gt;&lt;h4&gt;&lt;s:property value="o_id"/&gt;&lt;/h4&gt;&lt;/td&gt; &lt;td&gt;&lt;h4&gt;&lt;s:property value="listed_price"/&gt;&lt;/h4&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/s:iterator&gt; </code></pre> <p><strong>Challenges/Issues:</strong> My problem is not to get output successfully even not getting any error after debugging. Empty mind now thinking to use O/R mapping to associate Objects JOIN with others. Please suggest me where i am wrong. Your suggestions appreciable.</p>
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    2. COUnable to view data/result on JSP page. Don't know whatever i need O/R mapping because all 3 tables are having POJO.
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