Jakarta ee 下拉选择要在春季传输的值

当用户单击正在提交表单的搜索按钮时，我需要从jsp传输下拉列表中选择的值

    <form:form modelAttribute="firstVO" method="post"> 

    <form:select path="secondVO.status" 
    id="status" > 
    <form : option value="all" label="All" /> 
    <form : option value="new" label="New" /> 
    </form:select> 

    <input type="button" name="search" value="Search" onclick="filterData();" /> 

    </form:form> 

    function filterData(){ 

    document.forms[0].action    =   Path+"/filter.do"; 
    document.forms[0].submit(); 
    } 
    ------------------------------------------------- 

    public class FirstVO { 

    private SecondVO secondVO; 
    } 


    public class SecondVO { 

    private String status; 
    } 

    public class DPSController { 

    @RequestMapping(value = "/filter.do") 
    public ModelAndView filterDashboard(HttpServletRequest request, @ModelAttribute SecondVO secondVO) { 
    System.out.println("secondVO.getStatus:"+secondVO.getStatus()); 
    } 
    } 

---

您的模型属性是firstVO，而不是secondVO。如下图所示更改filterDashboard签名应该可以工作

改变

   @RequestMapping(value = "/filter.do") 
        public ModelAndView filterDashboard(HttpServletRequest request, @ModelAttribute SecondVO secondVO) { 
        System.out.println("secondVO.getStatus:"+secondVO.getStatus()); 
    } 

到

---

这东西能正常工作。谢谢但若我在jsp页面中添加一个文本框并在DPSController类中访问它，那个么它将返回null。例如：JSP:public class SecondVO{private String status；private String psoNumber；}@RequestMapping（value=“/filter.do”）公共模型和视图过滤器仪表板（HttpServletRequest，@modeldattribute FirstVO FirstVO）{System.out.println（“FirstVO.getSecondVO（）.getStatus:+FirstVO.getSecondVO（）.getPsoNumber（））；}而不是标记。请试一下，它会正确绑定的。

   @RequestMapping(value = "/filter.do") 
        public ModelAndView filterDashboard(HttpServletRequest request, @ModelAttribute SecondVO secondVO) { 
        System.out.println("secondVO.getStatus:"+secondVO.getStatus()); 
    } 

@RequestMapping(value = "/filter.do") 
    public ModelAndView filterDashboard(HttpServletRequest request, @ModelAttribute FirstVO firstVO) { 
   System.out.println("firstVO.getSecondVO().getStatus:"+firstVO.getSecondVO().getStatus()); 
    }