Sample program for Getting JAVA LIST from SPRING MVC 3 CONTROLLER to JQUERY THROUGH AJAX CALL
Question
JQUERY:
$.ajax({
datatype:"json",
url:"<%=request.getContextPath()%>/appendStudentView.page",
type: 'post',
success: function(data, status) {
alert("status=="+data)
},
error: function(xhr, desc, err) {
alert("xhr=="+xhr+"Desc: " + desc + "\nErr:" + err);
}
});
SPRING CONTROLLER
/**
* Handles request for adding two numbers
*/
@RequestMapping(value = "/appendStudentView.page")
public @ResponseBody String appendStudentField() {
List xx=new ArrayList();
xx.add("CONTROLLER");
return xx;
}
I am calling the appendStudentField() method through JQUERY AJAX and returning a list.I am not getting the List xx in the response of the AJAX Call.
Kindly help it.
Thx Randy
2 answers
solution1
1 2011-05-25 15:51:32
Do you have Jackson on your classpath? Spring needs Jackson to output JSON.
This tag registers the DefaultAnnotationHandlerMapping and AnnotationMethodHandlerAdapter beans that are required for Spring MVC to dispatch requests to @Controllers. The tag configures those two beans with sensible defaults based on what is present in your classpath. The defaults are:
...
- Support for reading and writing JSON, if Jackson is present on the classpath.
Source: Configuring Spring MVC > 15.12.1. mvc:annotation-driven
solution2
0 2011-05-25 16:27:28
Couldn't you just use a Model and pass your variables that way? Here is an example bit of code I use.
@Controller
@Scope("prototype")
@RequestMapping("/favorites")
public class FavoritesController {
protected final Log logger = LogFactory.getLog(getClass());
@Autowired
FavoriteService favoriteService;
@RequestMapping(method = RequestMethod.POST)
public void handle(String circuit, String customer, String action, Model model) {
String userid = SecurityContextHolder.getContext().getAuthentication().getName();
List<Map<String, String>> favorites = null;
if (action.equals("save")) {
favoriteService.setFavorite(userid, circuit, customer);
favorites = favoriteService.getFavorites(userid);
}
if (action.equals("delete")) {
favoriteService.deleteFavorite(userid, circuit);
favorites = favoriteService.getFavorites(userid);
}
model.addAttribute("userid", userid);
model.addAttribute("circuit", circuit);
model.addAttribute("customer", customer);
model.addAttribute("favorites", favorites);
}
}
[Edited to add the jquery portion of this]
// ****************************************
// SAVE TO FAVORITES
// ****************************************
$("#save-to-favorite").live("click", function() {
var saveCircuit = $(this).attr('circuit');
var saveCustomer = $(this).attr('customer');
var data = "action=save&circuit=" + saveCircuit + "&customer=" + saveCustomer;
$.ajax( {
type : "POST",
url : "favorites.html",
data : data,
success : function(xhr) {
$("#favorite-list").html(xhr);
},
error : function(xhr) {
var response = xhr.responseText;
response = response.replace(/<html>.+<body>/i, "")
response = response.replace(/<\/body><\/html>/i, "")
alert(response);
}
});
});
// ****************************************
// DELETE FROM FAVORITES
// ****************************************
$(".delete-favorite-icon").live("click", function() {
var deleteCircuit = $(this).attr('circuit');
var data = "action=delete&circuit=" + deleteCircuit;
$.ajax( {
type : "POST",
url : "favorites.html",
data : data,
success : function(xhr) {
$("#favorite-list").html(xhr);
},
error : function(xhr) {
var response = xhr.responseText;
response = response.replace(/<html>.+<body>/i, "")
response = response.replace(/<\/body><\/html>/i, "")
alert(response);
}
});
});
`
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