Question

Controller设置为空team并获取所有organizations，然后将这2个对象传递给JSP。由于某种原因，表单无法提交数据并导致： 400 The request sent by the client was syntactically incorrect.。 Chrome会显示传递的表单数据：

name:Chris Paul Camps
rating:9
organization:com.sprhib.model.Organization@7ebffc91

JSP

 <form:form method="POST" commandName="team" action="${pageContext.request.contextPath}/team/add.html" class="col-md-4">
             <div class="form-group">
                 <label for="name"><spring:message code="label.name"></spring:message>:</label>
                 <form:input class="form-control" path="name" id="name" />
             </div>
            <div class="form-group">
                <label for="rating"><spring:message code="label.rating"></spring:message>:</label>
                <form:input class="form-control" path="rating" id="rating" />
            </div>
            <div class="form-group">
                <label for="organization"><spring:message code="label.organization"></spring:message>:</label>
                <form:select class="form-control" path="organization" id="organization">
                    <form:option value="" label="- Select -"/>
                    <form:options items="${organizations}" itemLabel="name" />
                </form:select>
            </div>
            <input type="submit" value="<spring:message code="label.add"></spring:message>" class="btn btn-default"/>
        </form:form>

控制器

@RequestMapping(value="/add", method=RequestMethod.GET)
    public ModelAndView addTeamPage() {
        ModelAndView modelAndView = new ModelAndView("teams/add-team-form");
        modelAndView.addObject("team", new Team());
        modelAndView.addObject("organizations", organizationService.getOrganizations());

        return modelAndView;
    }

    @RequestMapping(value="/add", method=RequestMethod.POST)
    public ModelAndView addingTeam(@ModelAttribute Team team) {
        ModelAndView modelAndView = new ModelAndView("home");
        teamService.addTeam(team);
        String message = "Team was successfully added.";
        modelAndView.addObject("message", message);
        return modelAndView;
    }

团队实体：

@Entity
@Table(name="teams")
public class Team {


    private Integer id;

    private String name;

    private Integer rating;

    private Set<Member> members;

    private Organization organization;

    @Id
    @GeneratedValue
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getRating() {
        return rating;
    }
    public void setRating(Integer rating) {
        this.rating = rating;
    }

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "FK_Organization_id", nullable = false)
    public Organization getOrganization() {
        return organization;
    }

    public void setOrganization(Organization organization) {
        this.organization = organization;
    }

    @ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    @JoinTable(name = "team_member", joinColumns =
    @JoinColumn(name = "FK_Team_id", referencedColumnName= "id"),
            inverseJoinColumns = @JoinColumn(name = "FK_Member_id", referencedColumnName = "id")
    )
    public Set<Member> getMembers() {
        return members;
    }

    public void setMembers(Set<Member> members) {
        this.members = members;
    }

}

组织实体：

@Entity
@Table(name = "organization")
public class Organization {

    private Integer id;

    private String name;

    private Set<Team> teams;

    @Id
    @GeneratedValue
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @OneToMany(fetch = FetchType.EAGER, mappedBy = "organization")
    public Set<Team> getTeams() {
        return teams;
    }

    public void setTeams(Set<Team> teams) {
        this.teams = teams;
    }
}

更新

更改为此后出现相同的错误：

<form:select class="form-control" path="organization" id="organization">
                    <form:option value="" label="- Select -"/>
                    <form:options items="${organizations}" itemLabel="name" itemValue="id"/>
                </form:select>

我是否必须在控制器中有两个@ModelAttribute，一个用于团队，另一个用于组织？

UPDATE2：

为什么organization似乎null出现此错误：nested exception is org.hibernate.PropertyValueException: not-null property references a null or transient value: com.sprhib.model.Team.organization？

Answer 1

尝试将控制器方法更改为

@RequestMapping(value="/add", method=RequestMethod.POST)
public ModelAndView addingTeam(@ModelAttribute Team team,  BindingResult result) {

您最有可能存在绑定错误，但是因为在您的控制器内部没有 BindingResult 紧跟在 @ModelAttribute 之后得到一个糟糕的请求

检查docs BindingResult的无效排序和@ModelAttribute。

错误或BindingResult参数必须遵循模型对象正如方法签名可能具有的那样立即绑定多一个模型

通过添加BindingResult，我会更深入地了解失败的确切属性

评论后更新

您还需要注册一个可以转换您的组织的活页夹，大致类似于

@InitBinder
public void initBinder(WebDataBinder binder) {
    binder.registerCustomEditor(Organization.class,
            new PropertyEditorSupport() {

                @Override
                public void setAsText(String text) {
                    Organization organization = dao.find(Organization.class,
                            Integer.parseInt(text));
                    setValue(organization);
                }
            });
}

dao.find(Organization.class, Integer.parseInt(text));当然是一个元代码

将数据发布到控制器时，Spring标记请求不正确

1 个答案: