在hibernate中解决java.lang.StackOverflowError

最新推荐文章于 2025-06-11 09:45:00 发布

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最新推荐文章于 2025-06-11 09:45:00 发布

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本文介绍了一个关于Servlet doGet与doPost方法调用导致死循环的问题及解决方案。通过修正请求处理流程，避免了因方法不当调用造成的StackOverflowError错误。

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好长时间没用过hibernate，今天突然用到，发现一个小小的错误产生，不知何种原因，知道在优快云上看到末尾仁兄的博客才知道解决办法，先分享。

@WebServlet("/GoodsServlet")
public class GoodsServlet extends HttpServlet{
private static final long serialVersionUID = 1L;
private static GoodsDao dao = new GoodsDaoImpl();

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
this.doPost(request, response);
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String action = request.getParameter("action");
if (action.equals("selectGoodsList")) {
try {
List<GoodsBean> list = dao.selectGoodsList();
request.setAttribute("goods", list);
request.getRequestDispatcher("goods/goodsList.jsp").forward(request, response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

public class GoodsDaoImpl implements GoodsDao {

private Connection conn;
private PreparedStatement preStatement;
private ResultSet res;

/**
* 查询商品列表
* @throws SQLException
*/
@Override
public List<GoodsBean> selectGoodsList() throws SQLException {
// TODO Auto-generated method stub
DBConnection db = new DBConnection();
conn = db.getConn();
String sql = "select g.gid,g.gname,g.price,g.detail,g.tid,t.tname from tbl_goods g,tbl_type t where g.tid=t.tid";
preStatement = conn.prepareStatement(sql);
res = preStatement.executeQuery();
List<GoodsBean> list = new ArrayList<GoodsBean>();
while(res.next()){
GoodsBean goods = new GoodsBean();
TypeBean type = new TypeBean();
goods.setGid(res.getInt("gid"));
goods.setGname(res.getString("gname"));
goods.setPrice(res.getBigDecimal("price"));
goods.setDetail(res.getString("detail"));
goods.setTid(res.getInt("tid"));
type.setTid(res.getInt("tid"));
type.setTname(res.getString("tname"));

goods.setType(type);
list.add(goods);
}
conn.close();
return list;
}