後臺程式碼：

public String validDatabaseName(){
		try {
			HttpServletRequest request = ServletActionContext.getRequest();  
			String dbinstanceid = request.getParameter("dbinstanceid");
			String dbname = request.getParameter("dbname");
			int count = rdsManager.getDatabaseCountByName(dbinstanceid,dbname);
			if(count>0){
				simpleJSON.put("success", "false");
			}else{
				simpleJSON.put("success", "true");
			}
		} catch (Exception e) {
			simpleJSON.put("success", "false");
			simpleJSON.put("msg", e.getMessage());
		}
		return SUCCESS;
	}
 

前臺程式碼：

	$.extend($.fn.validatebox.defaults.rules, {
			checkName : {
			        validator: function (value) {  
			            var checkR=$.ajax({  
			                async : false,    
			                cache : false,  
			                type : 'post',    
			                url : webContext+'/rds/rds_validDatabaseName.action', 
			                data : {    
			                	dbinstanceid:'${param.dbinstanceid}',dbname:value
			                }   
			            }).responseText; 
			            var dataObj=eval("("+checkR+")");//轉換為json物件      
			            return dataObj.success==true;   
			        },  
			        message: '資料庫名需惟一，由小寫字母，數字、下劃線組成，字母開頭，長度不超過64個字元！'  
			    }  
		  });