Spring HashMap表单

时间:2014-07-11 13:48:00

标签: spring-mvc spring-roo

我正在使用Spring Roo创建一个用于生成文档的应用程序。首先,用户创建一个文档:

public class Document {

  @NotNull
  private String titleDocument;

  @OneToMany(cascade = CascadeType.ALL, mappedBy = "relatedDocumentToThisDateField")
  private Set<DateField> dateFields = new HashSet<DateField>();

  @OneToMany(cascade = CascadeType.ALL, mappedBy = "relatedDocumentToThisRadioButton")
  private Set<RadioButtonField> radioButtonFields = new HashSet<RadioButtonField>();

  @OneToMany(cascade = CascadeType.ALL, mappedBy = "relatedDocumentToThisStringField")
  private Set<StringField> stringFields = new HashSet<StringField>();
}

有3种类型的字段,为简化起见,这是StringField(其他字段几乎相同):

public class StringField extends Field {

  @NotNull
  private String valueString;

  @NotNull
  private Boolean isEditable;

  @ManyToOne
  private Document relatedDocumentToThisStringField;

  @NotNull
  private String nameStringField;
}

创建包含字段的文档时,另一个用户必须填写它。由于我不知道文档将有多少字段,我需要创建一个HashMap表单(I am following this tutorial

我的HashMap是:

public class DynamicForm {  

  private Map<String, String> dynamicMap=new HashMap<String, String>();

  public Map<String, String> getDynamicMap() {
    return dynamicMap;
  }

  public void setDynamicMap(Map<String, String> dynamicMap) {
    this.dynamicMap = dynamicMap;
  }

}

在我的FillDocumentController中,我有:

@RequestMapping(value = "/{id}", params = "form", produces = "text/html")
public String updateForm(@PathVariable("id") Long id, Model uiModel) {

  ...

    // Create DynamicForm Map
    DynamicForm dynamicForm = new DynamicForm();
    for (Field field : allFields) {

        // Is StringField?
        if (field.getClass().equals(StringField.class) == true) {
        StringField  stringField = (StringField) field;

        if( stringField.getIsEditable() == true ) {
            dynamicForm.getDynamicMap().put(stringField.getNameStringField(), stringField.getValueString() );
            }
        }
    }

uiModel.addAttribute("dynamicForm", dynamicForm);

return "filldocuments/update";
}

这是观点:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<div
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:field="urn:jsptagdir:/WEB-INF/tags/form/fields"
xmlns:form="http://www.springframework.org/tags/form"
xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0">

<jsp:directive.page contentType="text/html;charset=UTF-8" />
<jsp:output omit-xml-declaration="yes" />

<form:form action="/DocumentGenerator/filldocuments/add" modelAttribute="dynamicForm" method="post">

        <c:forEach items="${dynamicForm.dynamicMap}" var="element">

                <input name="element['${element.key}']" value="${element.value}"/>

        </c:forEach>

        <input type="submit" value="Save" />

        </form:form>

</div>

这是捕获modelAttribute:

的方法
@RequestMapping(value="/add", method = RequestMethod.POST, produces = "text/html")
public String update(@ModelAttribute(value="dynamicForm") DynamicForm dynamicForm, BindingResult bindingResult, Model uiModel, HttpServletRequest httpServletRequest) {

    for( String key : dynamicForm.getDynamicMap().keySet() ) {
        System.out.println("key="+key);
    }


    return "redirect:/filldocuments";
}

我的问题是dynamicForm是空的。 uiModel中还有另一个DynamicForm,也是空的(我处于调试模式)。用户填写的数据在哪里?我不知道出了什么问题!!

1 个答案:

答案 0 :(得分:2)

我的错,观点必须是这样的:

<c:forEach items="${dynamicForm.dynamicMap}" var="dynamicMap">

        <input name="dynamicMap['${dynamicMap.key}']" value="${dynamicMap.value}"/>

</c:forEach>

所以错误是使用变量元素