Java tutorial
/** * Copyright (c) 2013-2015 www.javahih.com * * Licensed under the Apache License, Version 2.0 (the "License"); */ package com.hihsoft.baseclass.web.util; import org.apache.commons.beanutils.Converter; public class StringConverter implements Converter { public StringConverter() { } @SuppressWarnings("rawtypes") public Object convert(Class type, Object value) { if (value == null || "".equals(value.toString())) { return (String) null; } else { return value.toString(); } } }