页面代码
<tr bgcolor="#FFFFFF">
<td height="28" align="center">负责社团</td>
<td width="40" height="60">
<select id="corporationId" >
<option value="" selected="selected">请选择社团</option>
<c:forEach items="${corporations}" var="corporation">
<option value="${corporation.id}">${corporation.name}</option>
</c:forEach>
</select>
</td>
</tr>报错内容:org.apache.jasper.JasperException: java.lang.NumberFormatException: For input string: "id"
id 是String型
当我这样写时
<c:forEach items="${corporations}" var="corporation">
<option value=""></option>
</c:forEach>
页面不报错
<tr bgcolor="#FFFFFF">
<td height="28" align="center">负责社团</td>
<td width="40" height="60">
<select id="corporationId" >
<option value="" selected="selected">请选择社团</option>
<c:forEach items="${corporations}" var="corporation">
<option value="${corporation.id}">${corporation.name}</option>
</c:forEach>
</select>
</td>
</tr>报错内容:org.apache.jasper.JasperException: java.lang.NumberFormatException: For input string: "id"
id 是String型
当我这样写时
<c:forEach items="${corporations}" var="corporation">
<option value=""></option>
</c:forEach>
页面不报错
你确定corporation里的id属性是String型的???
package com.whitefree.orm;import java.io.Serializable;
import java.util.Date;public class Corporation implements Serializable{ /**
*
*/
private static final long serialVersionUID = 1L;
private String id; //社团编号
private String name; //社团名称
private String type; //社团类型
private String intro; //社团宗旨
private Date foundDate; //社团创建时间
private Users teacher; //负责教师
private String delFlag; //删除标记
public Corporation() {
super();
} public Corporation(String id, String name, String type, String intro,
Date foundDate, Users teacher, String delFlag) {
super();
this.id = id;
this.name = name;
this.type = type;
this.intro = intro;
this.foundDate = foundDate;
this.teacher = teacher;
this.delFlag = delFlag;
}servlet里的方法
public void queryMyCorporation(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
HttpSession session=request.getSession(); //获得session
Users teacher=(Users) session.getAttribute("loginer"); //从登陆的servlet中获得登陆者信息
CorporationDAOImpl corporationDAOImpl = new CorporationDAOImpl(); //实例化社团的DAO操作类
//根据教师编号查询社团
System.out.println(teacher.getId());
List<Corporation> corporations=corporationDAOImpl.findCorporationByTeacherId(teacher.getId());
session.setAttribute("corporations", corporations);
request.getRequestDispatcher("/teacher/addLeader.jsp").forward(request, response);
}
结果查询的结果我直接使用query.list,导致类型转换异常。
使用query就好了,谢谢大家了