Spring MVC——Thymeleaf 中不显示 Flash 属性

Question

我已经确认我正在将 RedirectAttributes 与带有非空字符串的 BusinessAuth 对象打包在一起。我做错了什么？

管理员控制器：

@RequestMapping(path = BASE_URI + "/auth/business")
public String generateBusinessKeys(RedirectAttributes redirectAttributes) {
    String keyBusiness = ControllerUtil.getNewAuthKey();
    String keyMobile = ControllerUtil.getNewAuthKey();
    BusinessAuth auth = new BusinessAuth(keyBusiness, keyMobile);
    businessAuthService.save(auth);
    redirectAttributes.addFlashAttribute("businessAuth", auth);

    return "/admin/home";
}

HTML：

<p th:if="${businessAuth} != null" th:text="admin: "></p>
<p th:if="${businessAuth} != null" th:text="${businessAuth.keyAdmin}"></p> <br />
<p th:if="${businessAuth} != null" th:text="mobile: "></p> <br />
<p th:if="${businessAuth} != null" th:text="${businessAuth.keyMobile}"></p> <br />

商业认证：

@Entity
public class BusinessAuth extends BaseEntity {

private String keyMobile;
private String keyAdmin;

public BusinessAuth() {}

public BusinessAuth(String keyMobile, String keyAdmin) {
    this.keyMobile = keyMobile;
    this.keyAdmin = keyAdmin;
}

public String getKeyMobile() {
    return keyMobile;
}

public String getKeyAdmin() {
    return keyAdmin;
}

}

Answer 1

在ModelMap 上设置属性就可以了。