Question

我正在尝试从spring mvc应用程序的addDepartment.jsp页面中删除数据库中的部门。我尝试删除

时收到此错误

org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/views/addDepartment.jsp at line 21

18:                 </tr>
19:                 <tr>
20:                     <td><form:label path="departmentName">Department Name:</form:label></td>
21:                     <td><form:input path="departmentName" value="${department.departmentName}"/></td>
22:                 </tr>
23:                 
24:                 <tr>

这是addDepartment.jsp文件的第21行

21:                     <td><form:input path="departmentName" value="${department.departmentName}"/></td>

这是处理删除功能的视图的控制器

@RequestMapping(value = "/deleteDepartment", method = RequestMethod.GET)
    public ModelAndView deleteCategory(@ModelAttribute("command")  Department department,
            BindingResult result) {
        departmentService.deleteDepartment(department.getDepartmentId());
        Map<String, Object> model = new HashMap<String, Object>();
        model.put("department",  departmentService.getDepartments());
        return new ModelAndView("addDepartment", model);
    }

这是错误的根本原因堆栈跟踪

java.lang.NumberFormatException: For input string: "departmentName"
    java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
    java.lang.Integer.parseInt(Integer.java:580)
    java.lang.Integer.parseInt(Integer.java:615)

这是处理addDepartment.jsp文件删除的代码视图

<c:forEach items="${departments}" var="department">
            <tr>
                <td><c:out value="${department.departmentId}"/></td>
                <td><c:out value="${department.departmentName}"/></td>
                <td align="center"><a href="editDepartment?departmentId=${department.departmentId}">Edit</a> | <a href="deleteDepartment?departmentId=${department.departmentId}">Delete</a></td>
            </tr>
        </c:forEach>

为什么我无法删除部门名称？

Answer 1

如果我错了，请纠正我，但异常与deleteDepartment代码无关，而是与addDepartment.jsp页面有关，那么你如何将这两者连接在一起呢？

同样来自numberFormatException，似乎java试图将departmentName值转换为Integer。这当然没有意义，因为我想你会在这个领域喂一个字符串。

我不完全确定问题来自您共享的代码，但我感觉某种混合选择departmentId或departnmentName选择“部门”，以便删除它。因此，从String值转换为抛出异常的数值。

HTTP状态500 - 在第21行处理JSP页面/WEB-INF/views/addDepartment.jsp时发生异常

1 个答案: