Question

有一个Spring MVC应用程序，两个实体 - Player和PlayerDetails，想要将PlayerDetails添加到现有的Player，但为此我需要通过参数传递一个玩家ID。但我不能从JSP页面传递一个paremeter，我正在使用Spring表单。仍然“必需的字符串参数'playerId'不存在”。我已经在JSP页面上获得了值，但问题是将其通过表单传递给方法。当我从方法中删除@RequestParam，并在方法内部硬编码“theInt2”时一切正常。

PlayerDetailsController.class

  @PostMapping("/savePlayerDetails")
    public String savePlayerDetails(@RequestParam("playerId") String theInt,
                    @ModelAttribute("details") PlayerDetails playerDetails){

     int theInt2 = Integer.parseInt(theInt);

     playerDetailsService.savePlayerDetails(theInt2, playerDetails);

     return "redirect:/players/list";
    }

细节-form.jsp

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

<form:form action="savePlayerDetails" modelAttribute="details" method="POST">

    <form:hidden path="id"/>
    Date of birth: <form:input path="dateOfBirth"/>
    Email: <form:input path="email"/>
    Preferred Foot: <form:input path="preferredFoot"/>
    Short info: <form:input path="shortInfo"/>
    <br><br>
    ${player.playerId}  <!-- just for test, player id is shown here -->

<input type="submit" value="Save" class="save" />
</form:form>

Answer 1

您没有从表单中传递playerId，请向您添加另一项输入，如下所示

<input type="hidden" name="playerId" value="${player.playerId}"/>

或

<form:hidden path="playerId"/>

也应该有用

如何从Spring表单传递参数到@RequestParam？

1 个答案: