Java 通过ajax将jsp页面转换为servlet,反之亦然
我正在通过ajax从jsp页面向servlet发送orderid,如果order表的orderid不匹配,它将显示一个错误 同一个jsp页面中的消息,通过该消息可以发出请求。现在我的问题是,当我发送一个有效的orderid时,它应该 通过servlet将页面转发到另一个jsp页面,该页面没有出现,也没有显示任何错误 jsp页面 servlet代码 如果(!(cmd==null)和&cmd.equalsIgnoreCase(“单个”)){Java 通过ajax将jsp页面转换为servlet,反之亦然,java,jquery,ajax,jsp,servlets,Java,Jquery,Ajax,Jsp,Servlets,我正在通过ajax从jsp页面向servlet发送orderid,如果order表的orderid不匹配,它将显示一个错误 同一个jsp页面中的消息,通过该消息可以发出请求。现在我的问题是,当我发送一个有效的orderid时,它应该 通过servlet将页面转发到另一个jsp页面,该页面没有出现,也没有显示任何错误 jsp页面 servlet代码 如果(!(cmd==null)和&cmd.equalsIgnoreCase(“单个”)){ OrderDB odb=new OrderDB(); 订单
OrderDB odb=new OrderDB();
订单=新订单();
List-odetaillist=newarraylist();
List ordercustlist=新建ArrayList();
字符串orderids=request.getParameter(“oid”);
试一试{
orders=odb.getOrdersById(orderId);
odetaillist=odb.getOrdersDetailsByOrderId(OrderID);
ordercustlist=odb.getOrderFromCustomer(OrderID);
Customer customerinfo=odb.getOrderCustomer(OrderID);
setAttribute(“OrderSingle”,订单);
setAttribute(“OrderDetail”,odetaillist);
setAttribute(“OrderCust”,ordercustlist);
setAttribute(“CustomerInfo”,CustomerInfo);
重定向=orderinfo;
RequestDispatcher视图=request.getRequestDispatcher(重定向);
视图。转发(请求、响应);
if(orders.getOrderid()==null){
JsonObject myobj=新的JsonObject();
myobj.addProperty(“成功”,假);
PrintWriter out=response.getWriter();
打印输出(myobj);
out.close();
回来
}
}捕获(SQLE异常){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
您始终可以从servlet发回响应代码,然后转发。例如,您可以发送成功,在这种情况下,您可以将document.location发送到新的servlet位置
在html5中也可以使用ajax上传文件。我得到了答案,感谢用户1889970您的技巧帮助 我创建了一个新的检查点,其工作只是检查orderid是否有效,如果有效,则将其转发到新页面或显示无效 jquery代码:
$("#find").click(function(event){
var cname = $('#oidss').val();
$.ajax({
type:'POST',
url:"Order",
style:"full",
maxRows:12,
dataType:"json",
data:{"cmd":"find","oid":encodeURIComponent(cname)},
beforeSend:function(){/*alert("data is sending")*/},
success:function(data,textStatus,jqXHR){
if(data.success){
window.location.href='Order?cmd=single&oid='+cname;
}
else
{
alert("Invalid Order No.");
$('#oidss').val("");
$('#oidss').focus();
}
},
error:function(jqXHR, textStatus, errorThrown){
console.log('textStatus:' + textStatus);
console.log('errorThrown:' + errorThrown);
console.log("Something really bad happened " + textStatus);
console.log("jqXHR.responseText " +jqXHR.responseText);
}
});
});
servlet代码:
else if(!(cmd==null)&&cmd.equalsIgnoreCase("find")){
OrderDB odb = new OrderDB();
Order orders = new Order() ;
JsonObject myobj = new JsonObject();
PrintWriter out = response.getWriter();
String orderids = request.getParameter("oid");
try {orders = odb.getOrdersById(orderids);
if(orders.getOrderid() != null){
myobj.addProperty("success", true);
}
else{
myobj.addProperty("success", false);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
out.print(myobj);
out.close();
return;
}
cmd的第二部分=单个:
if(!(cmd==null)&&cmd.equalsIgnoreCase("single")){
OrderDB odb = new OrderDB();
Order orders = new Order() ;
List<OrderDetail> odetaillist = new ArrayList<OrderDetail>();
List<Order> ordercustlist = new ArrayList<Order>();
String orderids = request.getParameter("oid");
try {
orders = odb.getOrdersById(orderids);
odetaillist = odb.getOrdersDetailsByOrderId(orderids);
ordercustlist = odb.getOrderFromCustomer(orderids);
Customer customerinfo = odb.getOrderCustomer(orderids);
request.setAttribute("OrderSingle", orders);
request.setAttribute("OrderDetail", odetaillist);
request.setAttribute("OrderCust", ordercustlist);
request.setAttribute("CustomerInfo", customerinfo);
redirect=orderinfo;
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(!(cmd==null)和&cmd.equalsIgnoreCase(“单一”)){
OrderDB odb=新的OrderDB();
订单=新订单();
List-odetaillist=newarraylist();
List ordercustlist=新建ArrayList();
字符串orderids=request.getParameter(“oid”);
试一试{
orders=odb.getOrdersById(orderId);
odetaillist=odb.getOrdersDetailsByOrderId(OrderID);
ordercustlist=odb.getOrderFromCustomer(OrderID);
Customer customerinfo=odb.getOrderCustomer(OrderID);
setAttribute(“OrderSingle”,订单);
setAttribute(“OrderDetail”,odetaillist);
setAttribute(“OrderCust”,ordercustlist);
setAttribute(“CustomerInfo”,CustomerInfo);
重定向=orderinfo;
}捕获(SQLE异常){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
在您的if(data.success)中{
javascript方法的一部分,您应该向服务器发送一个非ajax提交,然后在那里处理转发。请记住,您不能在ajax提交中进行转发。感谢Luiggi Mendoza..我直接通过jsp scriplets尝试了它的工作原理,但我想知道是否有任何方法可以通过ajax转发到另一个服务Let有些事情你可以在ajax调用中完成,有些事情你不能。有些事情你不能用ajax直接处理:转发/重定向到另一个页面,上传一个文件。当用户通过jsp或Servlet输入错误的“orderid”时,我想显示一个警报消息是在视图端而不是在控制器中处理的。看起来你需要了解这意味着您应该使用ajax响应方法(成功、错误等)处理消息。
$("#find").click(function(event){
var cname = $('#oidss').val();
$.ajax({
type:'POST',
url:"Order",
style:"full",
maxRows:12,
dataType:"json",
data:{"cmd":"find","oid":encodeURIComponent(cname)},
beforeSend:function(){/*alert("data is sending")*/},
success:function(data,textStatus,jqXHR){
if(data.success){
window.location.href='Order?cmd=single&oid='+cname;
}
else
{
alert("Invalid Order No.");
$('#oidss').val("");
$('#oidss').focus();
}
},
error:function(jqXHR, textStatus, errorThrown){
console.log('textStatus:' + textStatus);
console.log('errorThrown:' + errorThrown);
console.log("Something really bad happened " + textStatus);
console.log("jqXHR.responseText " +jqXHR.responseText);
}
});
});
else if(!(cmd==null)&&cmd.equalsIgnoreCase("find")){
OrderDB odb = new OrderDB();
Order orders = new Order() ;
JsonObject myobj = new JsonObject();
PrintWriter out = response.getWriter();
String orderids = request.getParameter("oid");
try {orders = odb.getOrdersById(orderids);
if(orders.getOrderid() != null){
myobj.addProperty("success", true);
}
else{
myobj.addProperty("success", false);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
out.print(myobj);
out.close();
return;
}
if(!(cmd==null)&&cmd.equalsIgnoreCase("single")){
OrderDB odb = new OrderDB();
Order orders = new Order() ;
List<OrderDetail> odetaillist = new ArrayList<OrderDetail>();
List<Order> ordercustlist = new ArrayList<Order>();
String orderids = request.getParameter("oid");
try {
orders = odb.getOrdersById(orderids);
odetaillist = odb.getOrdersDetailsByOrderId(orderids);
ordercustlist = odb.getOrderFromCustomer(orderids);
Customer customerinfo = odb.getOrderCustomer(orderids);
request.setAttribute("OrderSingle", orders);
request.setAttribute("OrderDetail", odetaillist);
request.setAttribute("OrderCust", ordercustlist);
request.setAttribute("CustomerInfo", customerinfo);
redirect=orderinfo;
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}