java.lang.IllegalStateException:bean名称的BindingResult和普通目标对象都不能作为请求属性使用_Java_Forms_Spring Boot_Thymeleaf

java.lang.IllegalStateException:bean名称的BindingResult和普通目标对象都不能作为请求属性使用

java forms spring-boot

java.lang.IllegalStateException:bean名称的BindingResult和普通目标对象都不能作为请求属性使用,java,forms,spring-boot,thymeleaf,Java,Forms,Spring Boot,Thymeleaf,这是我的表格 <!DOCTYPE html> <html lang="en" xmlns:th="http://www.thymeleaf.org"> <head th:replace="header :: head"></head> <body> <div th:replace="header :: head-nav"></div> <div id="wrapper"> <div cl

这是我的表格

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head th:replace="header :: head"></head>
<body>
<div th:replace="header :: head-nav"></div>
<div id="wrapper">
    <div class="container-fluid">
            <div th:each="catFeatGroup,status : ${catFeatGroupList}" class="form-group">
                <label>Position</label><input th:field="$   {catFeatGroupList[__${status.index}__].position}"  th:value="${catFeatGroup.position}" />
                <label>Name</label> <input name="${catFeatGroupList[__${status.index}__].name}" th:value="${catFeatGroup.name}" />
            </div>
            <button type="submit" class="btn btn-default">Submit</button>
    </div>
</div>
<div th:replace="footer :: foot"></div>
</body>
</html>

我缺少什么

表达式

th:field=“${catFeatGroupList[\uu${status.index}.\uu].position}”

正在创建错误

th:field

属性只能在html

表单

标记中使用，以访问已定义表单的字段。

th:field

属性生成3个html属性，

id

、

name

和

value

因此，您的代码可以修改为：

<div th:each="catFeatGroup,status : ${catFeatGroupList}" class="form-group">
    <label>Position</label>
    <input th:id="${'catFeatGroupList'+__${status.index}__+'.position'}" th:name="${'catFeatGroupList['+__${status.index}__+'].position'}" th:value="${catFeatGroup.position}" />
    <label>Name</label>
    <input th:id="${'catFeatGroupList'+__${status.index}__+'.name'}"     th:name="${'catFeatGroupList['+__${status.index}__+'].name'}" th:value="${catFeatGroup.name}" />
</div>

java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'catFeatGroupList[0]' available as request attribute

<div th:each="catFeatGroup,status : ${catFeatGroupList}" class="form-group">
    <label>Position</label>
    <input th:id="${'catFeatGroupList'+__${status.index}__+'.position'}" th:name="${'catFeatGroupList['+__${status.index}__+'].position'}" th:value="${catFeatGroup.position}" />
    <label>Name</label>
    <input th:id="${'catFeatGroupList'+__${status.index}__+'.name'}"     th:name="${'catFeatGroupList['+__${status.index}__+'].name'}" th:value="${catFeatGroup.name}" />
</div>

<form th:object="${modelObject}">
    <div th:each="catFeatGroup,status : *{catFeatGroupList}" class="form-group">
        <label>Position</label>
        <input th:field="*{catFeatGroupList[__${status.index}__].position}" />
        <label>Name</label>
        <input th:field="*{catFeatGroupList[__${status.index}__].name}" />
    </div>
</form>