添加商品对象时报错

Question

java.lang.IllegalArgumentException: Cannot invoke com.yourcompany.struts.entity.Goods.setBeginTime - argument type mismatch请高手帮忙解决下，感谢 

Answer 1

我也知道是参数类型不匹配，
我把我的actionform和hbm.xml文件贴出来吧actionformpublic class GoodsForm extends ActionForm {
/*
 * Generated Methods
 */ /** 
 * Method validate
 * @param mapping
 * @param request
 * @return ActionErrors
 */
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
// TODO Auto-generated method stub
return null;
} /** 
 * Method reset
 * @param mapping
 * @param request
 */
public void reset(ActionMapping mapping, HttpServletRequest request) {
// TODO Auto-generated method stub
}


private Goods item=new Goods(); public GoodsForm(){

if(item ==null){
item=new Goods();

}

item.setBuyer(new User());
item.setSaler(new User());

}


public Goods getItem() {
return item;
} public void setItem(Goods item) {
this.item = item;
}
}<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse - Hibernate Tools
-->
<hibernate-mapping package="com.yourcompany.struts.entity">
    <class name="Goods" table="goods" schema="dbo" catalog="epai">
        <id name="goodsId" type="java.lang.Long">
            <column name="goods_id" />
            <generator class="native" />
        </id>
        <property name="goodsName" type="java.lang.String">
            <column name="goods_name" length="50" not-null="true" />
        </property>
        <property name="goodsPrice" type="java.lang.Double">
            <column name="goods_price" scale="4" not-null="true" />
        </property>
        <property name="goodsPic" type="java.lang.String">
            <column name="goods_pic" length="500" />
        </property>
        <property name="goodsDesc" type="java.lang.String">
            <column name="goods_desc" length="3000" />
        </property>
       
       <many-to-one name="saler" class="User">
        <column name="saler_id" not-null="true"></column>
       </many-to-one>
       
        <property name="beginTime" type="java.sql.Date" >
            <column name="begin_time" length="23" />
        </property>
        <property name="endTime" type="java.sql.Date">
            <column name="end_time" length="23" />
        </property>
        
       <many-to-one name="buyer" class="User">
        <column name="buyer_id" not-null="true"></column>
       </many-to-one>
       
        <property name="goodsStatus" type="java.lang.Integer">
            <column name="goods_status" not-null="true" />
        </property>
        
        <set name="bids" inverse="true" lazy="false">
         <key>
         <column name="goods_id" not-null="true"/>
         </key>
         <one-to-many class="Bid"/>
        </set>
    </class>
</hibernate-mapping>

Answer 2

property name="goodsName" type="java.lang.String"把String 及下面对应的都改为小写试试

Answer 3

你把GoodsForm的beginTime类型改为String，
对数据库操作时做一下转换，
actionform 不能将例如"2009-05-20"这样的字符串自动转换为Date型