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java - Controller 不支持 JAVA。 Spring MVC

转载 作者：行者123 更新时间：2023-12-01 10:14:46 28 4
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我在发送 <form> 时遇到问题至 Controller 。当我按下提交按钮时，它显示 400 错误。当我尝试以 POST 方法将 smth 输出到控制台时，它没有显示。为什么 Controller 没有收到我的表单？谢谢! 400 error

这是我的 JSP 页面

    <%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<%@ taglib uri="http://www.springframework.org/security/tags"
    prefix="sec"%>
<%@page language="java" session="true"%>
<%
    request.setCharacterEncoding("UTF-8");
    response.setCharacterEncoding("UTF-8");
%>
<!DOCTYPE html>
<fmt:requestEncoding value="utf-8" />
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Поиск оппонента | Haine and Vold</title>
<link rel="shortcut icon" href="<c:url value="/resources/faviicon/iconHV.ico"/>" type="image/x-icon">
<link href="<c:url value="/resources/bootstrap/bootstrap.css"/>"
    rel="stylesheet" type="text/css">
<link href="<c:url value="/resources/CSS/styles.css"/>" rel="stylesheet"
    type="text/css">

</head>
<body>
<div class="container">
        <img class="img-responsive logo" src="/app/resources/logo.jpg">
    </div>
    <h5 class="text-center noparamserror">${noparams}</h5>
    <c:url var="getSearch" value="/user/search" />
    <br>
    <div class="container text-center">
        <form:form class="form-inline centerBlock" modelAttribute="users"
            method="POST" action="/app/user/search" accept-charset="utf-8">

            <div class="form-group">
                <label class="control-label" for="weight"><spring:message
                        code="label.searchparamweight" /></label>
                <form:select multiple="" class="form-control input-sm" path="weight"
                    name="weight">
                    <form:option value=""></form:option>
                    <form:option value="40"></form:option>
                    <form:option value="50"></form:option>
                    <form:option value="60"></form:option>
                    <form:option value="70"></form:option>
                    <form:option value="80"></form:option>
                    <form:option value="90"></form:option>
                    <form:option value="100"></form:option>
                    <form:option value="110"></form:option>
                    <form:option value="120"></form:option>
                </form:select>
            </div>

            <div class="form-group">
                <label class="control-label" for="gender"><spring:message
                        code="label.gender" /></label>
                <form:select multiple="" class="form-control input-sm" name="gender"
                    path="gender">
                    <form:option value=""></form:option>
                    <form:option value="Мужской"></form:option>
                    <form:option value="Женский"></form:option>
                </form:select>
            </div>
            <div class="form-group">

                <label class="control-label" for="place"><spring:message
                        code="label.place" /></label>

                <form:select class="form-control input-small" name="place"
                    path="place">
                    <form:option value=""></form:option>
                    <form:option value="Дзержинский"></form:option>
                    <form:option value="Киевский"></form:option>
                    <form:option value="Комминтерновский"></form:option>
                    <form:option value="Лененский"></form:option>
                    <form:option value="Московский"></form:option>
                    <form:option value="Октябрский"></form:option>
                    <form:option value="Орджоникидзевский"></form:option>
                    <form:option value="Фрунзенский"></form:option>
                    <form:option value="Холодная гора"></form:option>
                    <form:option value="Червонозаводской"></form:option>
                </form:select>
            </div>

            <div class="form-group">

                <label class="control-label" for="age"><spring:message
                        code="label.searchparamage" /></label>

                <form:select multiple="" class="form-control input-small" name="age"
                    path="age">
                    <form:option value=""></form:option>
                    <form:option value="19"></form:option>
                    <form:option value="20"></form:option>
                    <form:option value="21"></form:option>
                    <form:option value="22"></form:option>
                    <form:option value="23"></form:option>
                    <form:option value="24"></form:option>
                    <form:option value="25"></form:option>
                    <form:option value="26"></form:option>
                    <form:option value="27"></form:option>
                    <form:option value="28"></form:option>
                    <form:option value="29"></form:option>
                    <form:option value="30"></form:option>
                    <form:option value="31"></form:option>
                    <form:option value="32"></form:option>
                    <form:option value="33"></form:option>
                    <form:option value="34"></form:option>
                    <form:option value="35"></form:option>
                    <form:option value="36"></form:option>
                    <form:option value="37"></form:option>
                    <form:option value="38"></form:option>
                    <form:option value="39"></form:option>
                    <form:option value="40"></form:option>
                    <form:option value="41"></form:option>
                    <form:option value="42"></form:option>
                    <form:option value="43"></form:option>
                    <form:option value="44"></form:option>
                    <form:option value="45"></form:option>
                </form:select>
            </div>


            <button class="btn btn-success" type="submit">
                <spring:message code="label.search" />
            </button>


        </form:form>

    </div>
    <br>
    <div class="scrollTableSearch">
        <c:if test="${!empty listUsersSort}">


            <table
                class="table table-striped table-bordered table-condensed table-hover">

                <tr>
                    <th><spring:message code="label.name" /></th>
                    <th><spring:message code="label.surname" /></th>
                    <th><spring:message code="label.gender" /></th>
                    <th><spring:message code="label.weight" /></th>
                    <th><spring:message code="label.height" /></th>
                    <th><spring:message code="label.sport" /></th>
                    <th><spring:message code="label.place" /></th>
                </tr>
                <c:forEach items="${listUsersSort}" var="users">
                    <tr>

                        <td><a href="<c:url value='/user/search/${users.username}'/>"
                            target="_blank"> ${users.name}</a></td>
                        <td>${users.surname}</td>
                        <td>${users.gender}</td>
                        <td>${users.weight}</td>
                        <td>${users.height}</td>
                        <td>${users.sport}</td>
                        <td>${users.place}</td>
                    </tr>
                </c:forEach>
            </table>

        </c:if>
    </div>
</body>
<script src="<c:url value="/resources/Jquery/jquery-2.1.4.min.js"/>"
    type="text/javascript"></script>
<script src="<c:url value="/resources/bootstrap/bootstrap.js"/>"
    type="text/javascript"></script>

</html>

这是我的 Controller 方法。

    @RequestMapping(value = "/user/search", method = RequestMethod.POST,produces = "text/plain;charset=UTF-8")
    public String listUsersSort(
            @RequestParam(value="weight") int weight,
            @RequestParam(value="gender") String gender,
            @RequestParam(value="place") String place,
            @RequestParam(value="age") int age,
            Model model, Principal principal)
    {

        System.out.println("int");
        if(weight<40 && gender.equals("") && place.equals("") && age<19)
        {
            model.addAttribute("users", new Users());
model.addAttribute("noparams", "Задайте параметры поиска");
return "searchingUser";
        }

        else{
    model.addAttribute("users", new Users());
        model.addAttribute("listUsersSort", usersService.listUsersSort(weight, gender, place, age, principal.getName()));
        model.addAttribute("allUserMess", this.dialogService.allNewMessForUser(principal.getName()));
        model.addAttribute("countOfFeedbacks", this.feedbackService.checkUnreadFedbacks().size());
        model.addAttribute("countOfNewUsers", this.usersService.countOfNewUsers());
        return "searchingUser";
        }}

最佳答案

您收到错误是因为您的代码介于使用表单支持 bean 和绑定(bind)请求参数之间。您应该删除表单中的 modelAttribute 和 path 属性。

或者从请求中删除 @RequestParam 带注释的参数，并创建 form-backing具有 weight、age、place、gender 属性的对象，并将该对象添加到带有注释的 Controller 方法签名中@ModelAttribute("用户")

关于java - Controller 不支持 JAVA。 Spring MVC，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35964846/

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