参考资料：

http://code.ciaoca.com/jquery/validation_engine/

http://www.cnblogs.com/aijun/archive/2011/03/21/1989991.html

http://csjava.blog.163.com/blog/static/1904700332012112065228299/

jsp：

<textarea name="content" id="content" cols="120" rows="4" style="overflow: auto;" 
class="validate[required,ajax[sensitiveWord]]"></textarea>

jquery.validationEngine-zh_CN.js：（Validation Engine 2.2.4 ,jQuery plugin，2.2.4版本的 ）

"sensitiveWord":{
                	"url": "test!validateInfo.fhtm","extraDataDynamic": ['#content'],"alertTextLoad": "验证中，请等待..."
                },

jquery.validationEngine.js: 需要修改以下的内容：

 _ajax: function(field,options) {

            var errorSelector = rules[i + 1];
            var rule = options.allrules[errorSelector];
            var extraData = rule.extraData;
            var extraDataDynamic = rule.extraDataDynamic;

            if (!extraData)
                extraData = "";

            if (extraDataDynamic) {
              var tmpData = [];
              var domIds = String(extraDataDynamic).split(",");
              for (var i = 0; i < domIds.length; i++) {
                var id = domIds[i];
                if ($(id).length) {
                  var inputValue = field.closest("form").find(id).val();
                  var keyValue = id.replace('#','') + '=' + 
                       encodeURIComponent(encodeURIComponent(inputValue));
                      //修改这里，原来的方法有点老，代码越界了，不需要换行
                  tmpData.push(keyValue);
                }
              }
              extraDataDynamic = tmpData.join("&");
            } else {
              extraDataDynamic = "";              
            }

java：