ibatis 调用存储过程报java.lang.NullPointerException错,50分相谢!!
(1)我的xml：
<parameterMap   id= "invoiceInsertMap "   class= "java.util.map "   >
<parameter   property= "invoicestart "   jdbcType= "NUMBER "   javaType= "java.lang.Long "   mode= "IN "/>
<parameter   property= "totalnum "   jdbcType= "NUMBER "   javaType= "java.lang.Integer "   mode= "IN "/>
<parameter   property= "invoicebookid "   jdbcType= "NUMBER "   javaType= "java.lang.Integer "   mode= "IN "/>      
</parameterMap>
        <procedure   id= "invoiceInsert "   parameterMap= "invoiceInsertMap "   >
                {call   invoiceInsert   (?,?,?)}
          </procedure>
(2)invoiceInsert     为数据库中存储过程，代码无误

(3)对外调用的接口：
                  public   int   invoiceInsert(InvoiceBook   invoicebook)   {
        HashMap   paramMap   =   new   HashMap();
        paramMap.put( "invoicestart ",   invoicebook.getInvoicestart());
        paramMap.put( "totalnum ",   invoicebook.getInvoicedicid());
        paramMap.put( "invoicebookid ",   invoicebook.getInvoicebookid());
        return   invoiceDao.invoiceInsert(paramMap);

}  
(4)invoiceDao   对xml配置中调用：
    public   int   invoiceInsert(HashMap   paramMap)   {
int   i=0;
try{
daoManager.startTransaction();
i=((Integer)queryForObject( "invoiceInsert ",paramMap)).intValue();
daoManager.commitTransaction();
}catch(Exception   e   ){
e.printStackTrace();
}
return   i;
}

控制台打印的结果
{call   invoiceInsert   (?,?,?)}
[100000000,   20,   1]
Types:   [java.lang.Long,   java.lang.Integer,   java.lang.Integer]
java.lang.NullPointerException
如果可以给个实例，也万分感谢!!!


------解决方案--------------------
paramMap.put( "invoicestart ", invoicebook.getInvoicestart());
paramMap.put( "totalnum ", invoicebook.getInvoicedicid());
paramMap.put( "invoicebookid ", invoicebook.getInvoicebookid());
你Debug一下看看这里面的参数是不是都有值啊？
------解决方案--------------------
帮定～
------解决方案--------------------
NullPointerException是最常见的一种错误了。
我对ibatis、存储过程都不是太了解，对你的程序也了解。
不过我推测是这一句报的nullpointer：i=((Integer)queryForObject( "invoiceInsert ",paramMap)).intValue();
queryForObject返回了null，你debug一下看看
------解决方案--------------------
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