我正在使用Thymeleaf并尝试进行一些对象绑定,但如果我有一个带有列表的对象,我不知道该怎么做。让我解释一下:
我的模特:
@Entity
public class Project {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@NotNull
private String name;
@NotNull
@Lob
private String description;
@NotNull
private Date startDate;
private String status;
@ManyToMany
private List<Role> rolesNeeded;
@ManyToMany
private List<Collaborator> collaborators;
public Project() {
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public List<Role> getRolesNeeded() {
return rolesNeeded;
}
public void setRolesNeeded(List<Role> rolesNeeded) {
this.rolesNeeded = rolesNeeded;
}
public List<Collaborator> getCollaborators() {
return collaborators;
}
public void setCollaborators(List<Collaborator> collaborators) {
this.collaborators = collaborators;
}
}
我的HTML格式:
<form method="post" action="addproject" th:object="${project}">
<div>
<label for="project_name"> Project Name:</label>
<input th:field="*{name}" type="text" name="project_name"/>
</div>
<div>
<label for="project_description">Project Description:</label>
<textarea th:field="*{description}" rows="4" name="project_description"></textarea>
</div>
<div>
<label for="project_status">Project Status:</label>
<div class="custom-select">
<span class="dropdown-arrow"></span>
<select th:field="*{status}" name="project_status">
<option value="active">Active</option>
<option value="archived">Archived</option>
<option value="not_started">Not Started</option>
</select>
</div>
</div>
<div>
<label for="project_roles">Project Roles:</label>
<ul class="checkbox-list">
<li th:each="role : ${roles}">
<input th:field="*{rolesNeeded}" type="checkbox" name="project_roles" th:value="${role}"/>
<span class="primary" th:text="${role.name}"> Developer</span>
</li>
</ul>
</div>
<div class="actions">
<input type="submit" value="Save" class="button"/>
<a href="#" class="button button-secondary">Cancel</a>
</div>
</form>
我收到错误:
错误!!!!:字段'rolesNeeded'上的对象'项目'中的字段错误: 被拒绝的价值 [com.imprender.instateam.model.Role @ 145d6cd4,com.imprender.instateam.model.Role @ 73020d6f]; 代码 [typeMismatch.project.rolesNeeded,typeMismatch.rolesNeeded,typeMismatch.java.util.List,typeMismatch]; 参数 [org.springframework.context.support.DefaultMessageSourceResolvable: 代码[project.rolesNeeded,rolesNeeded];参数[];默认消息 [rolesNeeded]];默认消息[无法转换属性值 输入'java.lang.String []'到必需类型'java.util.List' 属性'rolesNeeded';嵌套异常是 java.lang.IllegalStateException:无法转换类型的值 'java.lang.String'到必需的类型 'com.imprender.instateam.model.Role'属性'rolesNeeded [0]':否 找到匹配的编辑器或转换策略]
基本上,据我所知,复选框输入返回一个String [],但我的对象需要一个列表,因此无法执行绑定。
我如何在列表中绑定数组?(你有一个例子吗?)
谢谢。
答案 0 :(得分:0)
如果您的Role
bean具有active
布尔属性,您可以执行以下操作(简化):
<ul class="checkbox-list">
<li th:each="role,stat : ${project.rolesNeeded}">
<input th:field="*{rolesNeeded[__${stat.index}__].active}" type="checkbox"/>
<input th:field="*{rolesNeeded[__${stat.index}__].name}" type="hidden"/>
<span class="primary" th:text="${role.name}">Developer</span>
</li>
</ul>
如果没有,您可以将rolesNeeded
存储在隐藏字段中并使用javascript填充它们。