Develop Reference

my ajax wont execute my controller

i tried accessing my controller through ajax to get DB results but it wont work. The ajax is inside a submit button and executes well without the ajax. The code is supposed to execute a query and check if the input exists.
Here's my ajax
var jsonData = {
"appname": appname,
"txtype": txtype,
"ipaddress": ipaddress
};
$.ajax({
type: 'POST',
url: "checkaccesspermission.html",
data: jsonData,
success: function(data) {
if(data == "exists"){
alert('Permission Already Exists!');
return false;
}else{
alert('Add Permission test Succesful!');
return true;
}
},
async: false
});
here's my controller
#RequestMapping(value="/checkaccesspermission", method=RequestMethod.GET)
public String checkaccesspermission(#ModelAttribute("loginForm") IpAccessManagementModel loginForm, Model model,
#RequestParam("ipaddress") String ipaddress,
#RequestParam("txtypeHidden") String txtype,
#RequestParam("appIDHidden") String appID) throws IOException{
System.out.println("CHECKACCESSPERMISSIONs");
IpAccessManagementModel sub = new IpAccessManagementModel();
//System.out.println("<script language='JavaScript'>alert('Hello');</script>");
sub.setAppName(appID);
sub.setTxtType(txtype);
sub.setIpAddress(ipaddress);
System.out.println(ipaddress);
ipAccessMGTDAO.addPermission(sub);
String resultCheckExist = ipAccessMGTDAO.checkAccessPermission(sub);
return resultCheckExist;
}

Remove the .html extension and Change your method annotation in the controller to method=RequestMethod.POST
also remove
#RequestParam("ipaddress") String ipaddress,
#RequestParam("txtypeHidden") String txtype,
#RequestParam("appIDHidden") String appID
because its a Post request

Pass model and a string using ajax to Spring MVC

Hi I need to pass the full model and one string from html to Spring controller using AJAX. I use the below code snippet but it doesn't work.
var str = $("#resourceManagement").serialize();
var agreementId = ${agreementId};
var tempCnltName=$modal.find("input[data-type='cnltName']").val();
$.ajax({
type:"POST",
data: {str, tempCnltName},
url: "${AGREEMENT_BASE_URL}/checkDuplicateConsultantOnline",
async: false,
dataType: "json",
success: function (data, status, xhr) {
message = data.errorMsg;
},
error: function () {
}
});
The problem is that if I pass model alone (str) or string alone (tempCnltName) I can get it in controller but I cannot get both together.
My controller is as below:
#RequestMapping(value = "/app/agreement/checkDuplicateConsultantOnline", method = RequestMethod.POST)
public #ResponseBody AjaxResponse checkDuplicateConsultantOnline(
#ModelAttribute("consultantBidModel") ConsultantBidModel model,
#RequestParam(value = "tempCnltName", required = false) String cnltName,
HttpServletRequest request,
HttpSession session) throws Exception {
final Set<String> allCnltNames = new HashSet<>();
String errMessage = "";
if (model.getLeadingCnltName() != null) {
allCnltNames.add(model.getLeadingCnltName().toLowerCase());
}
if (model.getJointVentureConsultants() != null) {
for (ConsultantBidListItem entry : model.getJointVentureConsultants()) {
if (!allCnltNames.add(entry.getCnltName().toLowerCase())) {
errMessage = "Each consultant can only appear once.";
}
}
}
if (model.getSubConsultants() != null) {
for (ConsultantBidListItem entry : model.getSubConsultants()) {
if (!allCnltNames.add(entry.getCnltName().toLowerCase())) {
errMessage = "Each consultant can only appear once.";
}
}
}
AjaxResponse response = new AjaxResponse();
if (errMessage != null) {
response.setSuccess(true);
response.setResponseObject(errMessage);
response.setErrorMsg(errMessage);
}
return response;
}

On the server side, you're already prepared to receive both the model (with #ModelAttribute) and an additional URL parameter (with #RequestParam)
On the client, append the URL parameter to the URL. Assuming that str is your model and tempCnltName is your string to submit to the server:
$.ajax({
type:"POST",
data: str,
url: "${AGREEMENT_BASE_URL}/checkDuplicateConsultantOnline?tempCnltName=" + tempCnltName,
...

try
var strVal = $("#resourceManagement").serialize();
var agreementId = ${agreementId};
var tempCnltNameVal=$modal.find("input[data-type='cnltName']").val();
$.ajax({
type:"POST",
data: {str: strVal, tempCnltName: tempCnltNameVal},
url: "${AGREEMENT_BASE_URL}/checkDuplicateConsultantOnline",
async: false,
dataType: "json",
success: function (data, status, xhr) {
message = data.errorMsg;
},
error: function () {
}
});
Probably the malformed json is causing trouble

Another way of doing the above, add the string to model:
var strVal = "consulName=" + tempCnltName + "&";strVal = strVal + $("#resourceManagement").serialize();
The model can then have a new parameter consulName and we can get the value in Controller.

How to post a json array to java servlet with jquery

I'm currently developing spring mvc application and I need to post JSON array.
When I access request.getParameter("paramValue") to fetch the param attibute, but it returning a null value,
Here is my front-end code:
$.ajax(url, {
async: true,
type: 'post',
contentType: 'application/json',
data: JSON.stringify({
"test":"test value"
})
}).done(function (response) {
console.log(data);
}).fail(function (xhr) {
console.log("request failed");
console.log(xhr);
});
Here is my server-side code:
#RequestMapping(value = "/Products", method = RequestMethod.POST)
public void saveProducts(HttpServletRequest req, HttpServletResponse res) throws Exception {
System.out.println(req.getContentType());
System.out.println(req.getContentLength());
System.out.println(req.getContextPath());
System.out.println(req.getParameterValues("test"));
System.out.println(req.getMethod());
StringBuilder buffer = new StringBuilder();
BufferedReader reader = req.getReader();
String line;
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
String data = buffer.toString();
System.out.println(data);
System.out.println(req.getParameter("test"));
}
The output is:
application/json
22
null
POST
{"test" : "Test DAta"}
null
I can't figure out whats going on, please help me.

remove this line in you ajax function
contentType: 'application/json',
and replace this line
data: JSON.stringify({
"test":"test value"
})
with
data: {
"test":"test value"
}
and also you can use
req.getParameter("test")
instead
req.getParameterValues("test")

You can by using this :
var data ={id: 1, name :'test'}
$.ajax(url, {
async: true,
type: 'post',
contentType: 'application/json',
data: data
}).done(function (response) {
console.log(data);
}).fail(function (xhr) {
console.log("request failed");
console.log(xhr);
});
and in server side
create a pojo :
public class Product{
private long id;
private String name;
// getters and setters
add library jackson .
add this method in your controller:
#RequestMapping(value = "/Products", method = RequestMethod.POST)
public RepsoneEntity<? >saveProducts(#requestBody Product pr){
LOG.debug(pr.toString());
return new reRepsoneEntity<Product>(pr,HttpStatus.ACCEPTED);
}

i finally fixed it several annotation and changing the the return type of server side method,
#RequestMapping(value = "/Products", method = RequestMethod.POST, produces = "application/json;charset=UTF-8")
public ResponseEntity<?> saveProducts(#RequestParam(value = "data") String brand) {
return ResponseEntity.ok(brand);
}</code>
front end
$.ajax(url, {
async: true,
type: "POST",
data: {"data" : JSON.stringify({"Brand" : "Test Brand"})}
}).done(function (response) {
console.log(response);
}).fail(function (xhr) {
console.log("request failed");
console.log(xhr);
});
and i used org.json to access json objects parsed as text, gson to deal with POJOs
and now it works :)

returning error response in jquery

I am trying to call a controller from jquery.Here every thing works fine,but in ajax it shows error alert. What is going wrong.
$.ajax({
type: 'POST',
url:'<%=request.getContextPath()%>/billing',
data: ({caseId: caseId, noteID : noteID}),
cache: false,
success: function(data){
alert("Success");
},
error: function(xhr, textStatus, error){
alert("Error occured.");
}
});
My controller
#RequestMapping(value = "/billing", method = RequestMethod.POST)
public String Billing(#RequestParam Long caseId,
#RequestParam Long noteID, HttpServletRequest request) throws Exception {
try{
----Some data base updation---
logger.debug("success ");
return "success";
} catch (Exception e) {
logger.error(e,e);
throw e;
}}
Please help me in this.

//you have to left content type to send the server side ,please define content type..
$.ajax({
type: "POST",
url: '#Url.Action("PerTGradeMastEdit", "Master")',
data: "{'Request':'" + request + "'}",
contentType: "application/json; charset=utf-8",
success: function (response) {
if (response != null) {
var strResponse = response;
var ProgramData = strResponse.split("/");
// response = ProgramData[0];programId
$('#txtPerGrade').val(ProgramData[0]);
$('#txtDesc').val(ProgramData[1]);
}
},
failure: function (msg) {
alert(msg);
window.location.href = '#Url.Action("INDEX", "AUTHORIZE")';
}
});`enter code here`

Why does #ResponseBody on a void method with Spring MVC show no element found in the Firefox console?

I have a Spring MVC controller that I am calling via JQuery.ajax.
The mapping in the controller is:
#RequestMapping(value = "/remove", method = RequestMethod.POST)
#ResponseBody
public void remove(#RequestParam("value1") String value1,
#RequestParam("value2") String value2)
{
// do stuff
}
The ajax call is:
$.ajax({
url: '/appserver/model/remove',
data: { value1: value1, value2: value2 },
type: 'POST',
traditional: true,
success: function() {
// do something on success
},
error: function(jqXHR, textStatus, errorThrown) {
// do something on error
}
});
The POST call completes successfully with HTTP status 200. However, in the Firefox console the following is output:
no element found ... myscript.js:1
If I change my controller to return a boolean then this error disappears. However, according to this question having #ResponseBody on a method with void return type is valid.
Is there anything I can change to remove this message?

As described in the JQuery Bugs and in Firefox Bug, it is a Firefox problem that occurs when response entity body is null.
To fix it, you have to return such a ResponseEntity in your Controller method.
Try to add dataType: 'text' in your request:
$.ajax({
url: '/appserver/model/remove',
data: { value1: value1, value2: value2 },
type: 'POST',
traditional: true,
dataType: 'text',
success: function() {
// do something on success
},
error: function(jqXHR, textStatus, errorThrown) {
// do something on error
}
});
and modify your Controller to return a ResponseEntity with a String as first parameter
#RequestMapping(value = "/remove", method = RequestMethod.POST)
public ResponseEntity<String> remove(#RequestParam("value1") String value1,
#RequestParam("value2") String value2)
{
// do stuff
return new ResponseEntity<String>("OK!!!",HttpStatus.NO_CONTENT);
}