java - Spring MVC does not save to database from html form -

hello have build simple form should save data database when submit form data not saved. how resolve ?

form in jsp

<form method="post">     product name:<br>     <input type="text" id="productname" name="product name">     <br>     last name:<br>     <input type="text" id="productserial" name="serial number">     <input type="submit" value="submit"> </form> 

controller

@requestmapping(value = "/savenewcontact", method = requestmethod.post)     public modelandview savecontact(@requestparam("productname") string productname,@requestparam("productserial") int productserial) {          product product = new product();          product.setname(productname);         product.setserial(productserial);          productdao.savenewproduct(product);         return new modelandview("redirect:/");     } 

dao implementation

public void savenewproduct(product product) {      jdbctemplate = new jdbctemplate(datasource);      string sql = "insert product (name, serial)"                   + " values (?, ?)";     jdbctemplate.update(sql, product.getname(), product.getserial());  } 

you don't have in view tells controller fields in jsp file correspond model. can accomplish using spring form tags:

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%> <form:form method="post">     product name:<br>     <form:input type="text" id="productname" name="product name" path="productname" />     <br>     last name:<br>     <form:input type="text" id="productserial" name="serial number" path="productserial" />     <input type="submit" value="submit"> </form:form>