JavaScript中如何调用Java方法

 
 
 
 
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 <%=shoes.getBrand() %>/<%=shoes.getSeries() %>/<%=shoes.getName() %>
<%=shoes.getPrice() %>
<%=shoes.getSex() %>/<%=shoes.getSize() %>

 public void deleteFromCart(String shoes_id) { System.out.println("ShopShoesDao.deleteFromCart"); String[] shoes_ids = shoes_id.split(","); Connection connection = DBUtil.getConnection(); PreparedStatement preparedStatement = null; try { for (String string : shoes_ids) { int id = Integer.parseInt(string); String sql = "delete from user_product_cart where shoes_id = ?"; preparedStatement = connection.prepareStatement(sql); preparedStatement.setInt(1, id); preparedStatement.executeUpdate(); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally { DBUtil.close(preparedStatement); DBUtil.close(connection); } }

 protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub System.out.println("service"); request.setCharacterEncoding("UTF-8"); String method=request.getParameter("method"); System.out.println(method); if(method.equals("addProduct")) { addProduct(request,response); }else if(method.equals("getShopsShoesImage")) { try { getShopsShoesImage(request,response); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } }else if(method.equals("addToCart")) { try { addToCart(request, response); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } }else if(method.equals("deleteFromCart")) { try { deleteFromCart(request, response); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } }else if(method.equals("payFromCart")) { try { payFromCart(request, response); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } private void deleteFromCart(HttpServletRequest request, HttpServletResponse response) throws IOException, SQLException { // TODO Auto-generated method stub System.out.println("deleteFromCart"); request.setCharacterEncoding("UTF-8"); int user_id= Integer.parseInt(request.getParameter("user_id")); System.out.println(user_id); String shoes_id = request.getParameter("shoes_id"); System.out.println(shoes_id); ShopShoesDao shopShoesDao = new ShopShoesDao(); shopShoesDao.deleteFromCart(shoes_id); request.getSession().setAttribute("shoes_id", shoes_id); response.sendRedirect(request.getContextPath()+"/cart.jsp"); }

 // 点击全部删除 deleteAll.onclick = function () { if (selectedTotal.innerHTML != 0) { var con = confirm('确定删除所选商品吗？'); //弹出确认框 if (con) { var shoes_id = ''; for (var i = 0; i