如何将字符串值发送回Spring MVC？

Question

<form:form method="post" action="/insertChapter" modelAttribute="Chapter">
<form:input type="hidden" path="chapter" value="${info.chapter}"/>
<form:input path="title" />
<input type="submit" value="Insert" />
</form:form>

<form:form method ="GET" action="/deleteChapter" modelAttribute="What is here?">
<form:hidden path = "chapter" value ="${info.chapter}"/>
<input type="submit" value="Delete Chapter ${info.chapter}" />
</form:form>

@RequestMapping("/insertChapter")
public String insertChapter(@ModelAttribute Chapter chapter) {
    if (chapter != null)
        infoService.insertChapter(chapter.getChapter(), chapter.getChapter());
        return "redirect:/getInfoListList";
}
@RequestMapping("/deleteChapter")
public String deleteChapter(@RequestParam String chapter) {
    infoService.deleteChapter(chapter);
    return "redirect:/getInfoListList";
}

处理JSP页时发生异常。第62行

Neither BindingResult nor plain target object for bean name 'chapter' available as request attribute

后来呢

bean名称'command'的BindingResult和普通目标对象都不能作为请求属性使用

@RequestMapping("/getInfoListList")
public ModelAndView getInfoListList(@ModelAttribute Chapter chapter, @ModelAttribute String chaptertobedeleted) {
    List<List<Info>> infoList = infoService.getInfoListList();
    ModelAndView aModel =new ModelAndView("infoListList", "infoListList", infoList);
    return aModel;
}

Answer 1

有多个问题。

在控制器中指定的commandName是什么。是否为info以及info是否具有chapter属性。

如果info是commandname,请尝试使用此选项

<form:form method="post" action="/insertChapter" commandName="info">