如何从视图中传递多个对象

Question

我试图在表单提交中发布一组关键字。当字段为空或数据为空时，控制器接受它，但是当我尝试使用填充的表单数据提交时，其抛出错误表示＆＃34;客户端发送的请求在语法上是不正确的。＆＃34;错误代码为＆＃34; 400＆＃34;。 对我来说，很难跟踪它是在我的控制器上还是在视图中的错误？

我已经包含了我的代码的控制器，模型和视图。提前谢谢

广告系列类

@Entity
@Table(name = "CAMPAIGN")
public class Campaign implements Serializable {

@Id
@Column(name = "ID")
private String campaignId;

@Column(name = "NAME", length = 50)
private String name;

@Column(name = "CLIENT_ID", length = 50)
private String clientId;

@DateTimeFormat(pattern = "yyyy-MM-dd")
@Column(name = "START_DATE")
private Date startDate;

@DateTimeFormat(pattern = "yyyy-MM-dd")
@Column(name = "END_DATE")
private Date endDate;

    @ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
@JoinTable(name = "CAMPAIGN_KEYWORDS", joinColumns = {
        @JoinColumn(name = "CAMPAIGN_ID", referencedColumnName = "ID", nullable = false)},
        inverseJoinColumns = {@JoinColumn(name = "KEYWORD_ID", referencedColumnName = "VALUE", nullable = false)})
private List<KeyWord> keywords;

关键字类

@Entity
@Table(name = "KEYWORD")
public class KeyWord  implements Serializable {

@Id
@Column(name = "VALUE")
private String value;
@Column(name = "TYPE")
private String type;
@Column(name = "STATUS")
private String status;
@ManyToMany(fetch = FetchType.LAZY, mappedBy = "keywords")
private List<Campaign> Campaigns;

控制器类

 @RequestMapping(value = "/edit", method = RequestMethod.GET)
    public String edit(Model model, @RequestParam(value = "id", required = false, defaultValue = "0") String id) {
        Campaign campaign;
        if(id.equalsIgnoreCase("0"))
        {
            campaign = new Campaign();
        }
        else{
            campaign = campaignDao.getCampaignById(id);
        }
        List<KeyWord> keyWordList = keyWordDoa.getAllKeywords();
        model.addAttribute("campaign", campaign);
        model.addAttribute("keyWordList", keyWordList);
        return campaignURL + "edit";
    }
@RequestMapping(value = "/edit", method = RequestMethod.POST)
    public String save(Model model, @ModelAttribute(value = "campaign") Campaign campaign, HttpServletRequest request) {

        if(campaign.getCampaignId() == null)
        {
            String id = GenerateID.getID();
            campaign.setCampaignId(id);
            campaign.setUrl(id);
        }
        campaignDao.addCampaign(campaign);


        return "redirect:/campaign";
    }

Thymeleaf观点

<form th:action="@{/campaign/edit}" method="post" th:object="${campaign}"
                                      enctype="multipart/form-data">
                                    <div class="form-group">
                                        <label class="form-label">Campaign ID</label>
                                        <div class="controls">
                                            <input type="text" disabled="disabled" class="form-control"
                                                   th:field="*{campaignId}">
                                        </div>
                                    </div>
                                    <div class="form-group">
                                        <label class="form-label">Name</label>
                                        <span class="help">e.g. "Red Bull"</span>
                                        <div class="controls">
                                            <input type="text" class="form-control" th:field="*{name}"
                                                   placeholder="Red Bull">
                                        </div>
                                    </div>
                                    <div class="form-group">
                                        <label class="form-label">User Group</label>
                                        <span class="help">Select The User group who has access</span>
                                        <div class="controls">
                                            <select class="multi" style="width:100%" th:field="*{clientId}">
                                                <option th:each="keyWord : ${keyWordList}"
                                                        th:value="${keyWord}" th:text="${keyWord.value}">Credit
                                                    card
                                                </option>
                                            </select>
                                        </div>
                                    </div>
                                    <div class="col-md-6">
                                        <div class="form-group">
                                            <label class="form-label">Start Date</label>
                                            <span class="help">"YYYY/MM/DD"</span>
                                            <div class="controls">
                                                <div class="input-append success date">
                                                    <input type="date" class="form-control" th:field="*{startDate}">
                                                    <span class="add-on"><span class="arrow"></span>
                                                        <i class="fa fa-th"></i></span>
                                                </div>
                                            </div>
                                        </div>
                                    </div>
                                    <div class="col-md-6">
                                        <div class="form-group">
                                            <label class="form-label">End Date</label>
                                            <span class="help">"YYYY/MM/DD"</span>
                                            <div class="controls">
                                                <div class="input-append success date">
                                                    <input type="date" class="form-control" th:field="*{endDate}">
                                                    <span class="add-on"><span class="arrow"></span>
                                                        <i class="fa fa-th"></i></span>
                                                </div>
                                            </div>
                                        </div>
                                    </div>
                                    <div class="form-group">
                                        <label class="form-label">Keywords</label>
                                        <span class="help">e.g. "Energy, Drink, RedBull"</span>
                                        <div class="controls">
                                            <select class="multi" style="width:100%" multiple th:field="*{keywords}" th:items>
                                                <option th:each="keyWord : ${keyWordList}"
                                                        th:value="${keyWord}" th:text="${keyWord.value}">Credit card
                                                </option>

                                            </select>
                                        </div>
                                    </div>


                                    <div class="col-md-6">
                                        <div class="form-group">
                                            <button class="btn  btn-default btn-cons" onclick="something()">Cancel
                                            </button>
                                        </div>
                                    </div>
                                    <div class="col-md-6">
                                        <div class="form-group">
                                            <button class="btn btn-success btn-cons" type="submit">Save</button>
                                        </div>
                                    </div>
                                </form>