求救阿，我用STRUTS开发的时候碰到了java.lang.NullPointerException异常，实在找不出来，求救
这个事我的JSP请求页面：
<form action= " <%=path%> %> /AddBookSave.do " name= "addBook " method= "post ">
<table width= "756 " height= "138 " border= "0 ">
<tr>
<td width= "178 " height= "39 "> 图书信息添加： </td>
<td width= "197 "> </td>
<td width= "163 "> </td>
<td width= "200 "> </td>
</tr>
<tr>
<td height= "18 "> <div align= "center "> 书名： </div> </td>
<td>
<label>
<input type= "text " name= "name "/>
</label>
</td>
<td> <div align= "center "> 作者： </div> </td>
<td>
<label>
<input type= "text " name= "author "/>
</label>
</td>
</tr>
<tr>
<td height= "37 "> <div align= "center "> 出版社： </div> </td>
<td>
<label>
<input type= "text " name= "press "/>
</label>
</td>
<td> <div align= "center "> 分类： </div> </td>
<td>
<label> </label>
<label>
<select name= "bookType ">
<option value= "1 " selected= "selected "> 计算机 </option>
<option value= "2 "> 科学 </option>
<option value= "3 "> 历史 </option>
<option value= "4 "> 文化 </option>
</select>
</label>
</td>
</tr>
<tr>
<td height= "31 "> <div align= "center "> 单价： </div> </td>
<td>
<label>
<input type= "text " name= "price "/>
</label>
</td>
<td> <div align= "center "> 数量： </div> </td>
<td>
<label>
<input type= "text " name= "count "/>
</label>
</td>
</tr>
</table>
<br/>
<table width= "756 " border= "0 ">
<tr>
<td height= "23 "> 图书介绍： </td>
</tr>
<tr>
<td height= "164 "> <label>
<textarea name= "textarea " cols= "105 " rows= "10 "> </textarea>
</label>
</td>
</tr>
</table>
</form>
这个是FORM：
public class BookInfoForm extends ActionForm {
String id;
String cateid;
String bookType;
String name;
String price;
String press;
String author;
String content;
String count;
Date regdate = null;
String sentcount;}//GET和SET方法太长久没有贴出来了，由于是空异常，想看看是不是因为FORM属性不对应。
这个是ACTION ：
public ActionForward execute(ActionMapping actionMapping,
ActionForm actionForm,
HttpServletRequest request,
HttpServletResponse repsonse) {
System.out.println( "保存书目信息 ");
BookInfoForm form = (BookInfoForm) actionForm;
DBManager db = new DBManager();
db.getConnection();
db.getStatement();
BookKindCode code = null;
String name = form.getName();
System.out.println( "书名： " + name);
Float price = Float.parseFloat(form.getPrice());
String press = form.getPress();
String author = form.getAuthor();
int count = Integer.parseInt(form.getCateid());
int cateid = code.getKindCode(form.getBookType());
String content = form.getContent();
Date regDate = form.getRegdate();
System.out.println( " " + regDate);
int id = 2;
int sentCount = 2;
String sql = "insert into book(id,cateid,name,price,press,author,content,count,regdate,sentcount) " +
"values( ' " + id + " ', ' " + cateid + " ', ' " + name + " ', ' " + price + " ', ' " + press + " ', ' " + author + " ', ' " + content + " ', ' " + count + " ', ' " +
regDate + " ', ' " + sentCount + " ') ";
int i = db.executeUpdate(sql);
if (i == 0) {
return actionMapping.findForward( "fail ");
} else {
return actionMapping.findForward( "success ");
}
}
谢谢了，
[解决办法]
在 <form action= " <%=path%> %> /AddBookSave.do " name= "addBook " method= "post "> 有问题,你改改看:
action=你在配置文件中对应的action的path就行了,
例如: <form action= "AddBookSave.do " name= "addBook " method= "post ">
[解决办法]
看一眼你的getset写对没落.大小写规范没?页面post了不能自动传值那就是你的对应该表单的ActionForm有问题
[解决办法]
<form action= " <%=path%> %> /AddBookSave.do " name= "addBook " method= "post ">
action 里多了“%> ”
