Post Nested Object to Spring MVC controller using JSON

Question

I have a controller with the POST handler defined like so:

@RequestMapping(value=\"/ajax/saveVendor.do\", method = RequestMethod.POST)
public @ResponseBody A         


        

Answer 1

first, sorry for my poor english

in spring, if the param name is like object[0][field], they will consider it as a class type like sub

public class Test {

    private List

that's why the spring will throw an exception said something "is neither an array nor a List nor a Map".

only when the param name is object[0].field, spring will treat it as a class's field.

you could find the constants def in org.springframework.beans.PropertyAccessor

so my solution is write a new param plugin for jquery, like below:

(function($) {
  // copy from jquery.js
  var r20 = /%20/g,
  rbracket = /\[\]$/;

  $.extend({
    customParam: function( a ) {
      var s = [],
        add = function( key, value ) {
          // If value is a function, invoke it and return its value
          value = jQuery.isFunction( value ) ? value() : value;
          s[ s.length ] = encodeURIComponent( key ) + "=" + encodeURIComponent( value );
        };

      // If an array was passed in, assume that it is an array of form elements.
      if ( jQuery.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
        // Serialize the form elements
        jQuery.each( a, function() {
          add( this.name, this.value );
        });

      } else {
        for ( var prefix in a ) {
          buildParams( prefix, a[ prefix ], add );
        }
      }

      // Return the resulting serialization
      return s.join( "&" ).replace( r20, "+" );
    }
  });

/* private method*/
function buildParams( prefix, obj, add ) {
  if ( jQuery.isArray( obj ) ) {
    // Serialize array item.
    jQuery.each( obj, function( i, v ) {
      if (rbracket.test( prefix ) ) {
        // Treat each array item as a scalar.
        add( prefix, v );

      } else {
        buildParams( prefix + "[" + ( typeof v === "object" || jQuery.isArray(v) ? i : "" ) + "]", v, add );
      }
    });

  } else if (obj != null && typeof obj === "object" ) {
    // Serialize object item.
    for ( var name in obj ) {
      buildParams( prefix + "." + name, obj[ name ], add );
    }

  } else {
    // Serialize scalar item.
    add( prefix, obj );
  }
};
})(jQuery);

actual I just change the code from

buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );

to

buildParams( prefix + "." + name, obj[ name ], add );

and use $.customParam instead of $.param when do ajax request.