Spring - Thymeleaf：异常处理模板
我正在关注 Spring in Action 第 5 版一书，但我相信这是一个错误。
这是本书的 GitHub。我到达了第 3 章 tacos-jdbc 源代码
提交我的订单时突然出现错误：
并以这种方式在终端上：
2019-05-25 16:58:18.164 错误 11777 --- [nio-8080-exec-7] org.thymeleaf.TemplateEngine : [THYMELEAF][http-nio-8080-exec-7] 异常处理模板“orderForm” ：模板解析期间发生错误（模板：“类路径资源[templates/orderForm.html]”）
org.thymeleaf.exceptions.TemplateInputException：模板解析期间发生错误（模板：“类路径资源 [templates/orderForm.html]”）
订单控制器：
@Controller
@RequestMapping("/orders")
@SessionAttributes("order")
public class OrderController {
private OrderRepository orderRepo;
public OrderController(OrderRepository orderRepo) {
this.orderRepo = orderRepo;
}
@GetMapping("/current")
public String orderForm() {
return "orderForm";
}
@PostMapping
public String processOrder(@Valid Order order, Errors errors,
SessionStatus sessionStatus) {
if (errors.hasErrors()) {
return "orderForm";
}
orderRepo.save(order);
sessionStatus.setComplete();
return "redirect:/";
}
}
慕丝7291255浏览 219回答 4
4回答
-
慕姐4208626
我修复了这段代码添加delivery前缀： <!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"><head> <title>Taco Cloud</title> <link rel="stylesheet" th:href="@{/styles.css}" /></head><body><form method="POST" th:action="@{/orders}" th:object="${order}"> <h1>Order your taco creations!</h1> <img th:src="@{/images/TacoCloud.png}"/> <h3>Your tacos in this order:</h3> <a th:href="@{/design}" id="another">Design another taco</a><br/> <ul> <li th:each="taco : ${order.tacos}"><span th:text="${taco.name}">taco name</span></li> </ul> <div th:if="${#fields.hasErrors()}"> <span class="validationError"> Please correct the problems below and resubmit. </span> </div> <h3>Deliver my taco masterpieces to...</h3> <label for="deliveryName">Name: </label> <input type="text" th:field="*{deliveryName}"/> <span class="validationError" th:if="${#fields.hasErrors('deliveryName')}" th:errors="*{deliveryName}">Name Error</span> <br/> <label for="deliveryStreet">Street address: </label> <input type="text" th:field="*{deliveryStreet}"/> <span class="validationError" th:if="${#fields.hasErrors('deliveryStreet')}" th:errors="*{deliveryStreet}">Street Error</span> <br/> <label for="deliveryCity">City: </label> <input type="text" th:field="*{deliveryCity}"/> <span class="validationError" th:if="${#fields.hasErrors('deliveryCity')}" th:errors="*{deliveryCity}">City Error</span> <br/> <label for="deliveryState">State: </label> <input type="text" th:field="*{deliveryState}"/> <span class="validationError" th:if="${#fields.hasErrors('deliveryState')}" th:errors="*{deliveryState}">State Error</span> <br/> <label for="deliveryZip">Zip code: </label> <input type="text" th:field="*{deliveryZip}"/> <span class="validationError" th:if="${#fields.hasErrors('deliveryZip')}" th:errors="*{deliveryZip}">Zip Error</span> <br/> <h3>Here's how I'll pay...</h3> <label for="ccNumber">Credit Card #: </label> <input type="text" th:field="*{ccNumber}"/> <span class="validationError" th:if="${#fields.hasErrors('ccNumber')}" th:errors="*{ccNumber}">CC Num Error</span> <br/> <label for="ccExpiration">Expiration: </label> <input type="text" th:field="*{ccExpiration}"/> <span class="validationError" th:if="${#fields.hasErrors('ccExpiration')}" th:errors="*{ccExpiration}">CC Num Error</span> <br/> <label for="ccCVV">CVV: </label> <input type="text" th:field="*{ccCVV}"/> <span class="validationError" th:if="${#fields.hasErrors('ccCVV')}" th:errors="*{ccCVV}">CC Num Error</span> <br/> <input type="submit" value="Submit order"/></form></body></html> -
慕尼黑8549860
我认为您应该按照书中所述处理 orderForm.html 中所有输入中验证错误的显示，如下所示：（来源 Git）<!-- tag::allButValidation[] --><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"> <head> <title>Taco Cloud</title> <link rel="stylesheet" th:href="@{/styles.css}" /> </head> <body> <form method="POST" th:action="@{/orders}" th:object="${order}"> <h1>Order your taco creations!</h1> <img th:src="@{/images/TacoCloud.png}"/> <a th:href="@{/design}" id="another">Design another taco</a><br/> <div th:if="${#fields.hasErrors()}"> <span class="validationError"> Please correct the problems below and resubmit. </span> </div> <h3>Deliver my taco masterpieces to...</h3> <label for="name">Name: </label> <input type="text" th:field="*{name}"/><!-- end::allButValidation[] --> <span class="validationError" th:if="${#fields.hasErrors('name')}" th:errors="*{name}">Name Error</span><!-- tag::allButValidation[] --> <br/> <label for="street">Street address: </label> <input type="text" th:field="*{street}"/><!-- end::allButValidation[] --> <span class="validationError" th:if="${#fields.hasErrors('street')}" th:errors="*{street}">Street Error</span><!-- tag::allButValidation[] --> <br/> <label for="city">City: </label> <input type="text" th:field="*{city}"/><!-- end::allButValidation[] --> <span class="validationError" th:if="${#fields.hasErrors('city')}" th:errors="*{city}">City Error</span><!-- tag::allButValidation[] --> <br/> <label for="state">State: </label> <input type="text" th:field="*{state}"/><!-- end::allButValidation[] --> <span class="validationError" th:if="${#fields.hasErrors('state')}" th:errors="*{state}">State Error</span><!-- tag::allButValidation[] --> <br/> <label for="zip">Zip code: </label> <input type="text" th:field="*{zip}"/><!-- end::allButValidation[] --> <span class="validationError" th:if="${#fields.hasErrors('zip')}" th:errors="*{zip}">Zip Error</span><!-- tag::allButValidation[] --> <br/> <h3>Here's how I'll pay...</h3><!-- tag::validatedField[] --> <label for="ccNumber">Credit Card #: </label> <input type="text" th:field="*{ccNumber}"/><!-- end::allButValidation[] --> <span class="validationError" th:if="${#fields.hasErrors('ccNumber')}" th:errors="*{ccNumber}">CC Num Error</span><!-- tag::allButValidation[] --><!-- end::validatedField[] --> <br/> <label for="ccExpiration">Expiration: </label> <input type="text" th:field="*{ccExpiration}"/><!-- end::allButValidation[] --> <span class="validationError" th:if="${#fields.hasErrors('ccExpiration')}" th:errors="*{ccExpiration}">CC Num Error</span><!-- tag::allButValidation[] --> <br/> <label for="ccCVV">CVV: </label> <input type="text" th:field="*{ccCVV}"/><!-- end::allButValidation[] --> <span class="validationError" th:if="${#fields.hasErrors('ccCVV')}" th:errors="*{ccCVV}">CC Num Error</span><!-- tag::allButValidation[] --> <br/> <input type="submit" value="Submit order"/> </form> </body></html><!-- end::allButValidation[] -->我认为您没有按照本章中解释的添加到 bean 中的验证规则在表单中插入正确的信息。通过显示验证错误，您将在提交订单时确切地知道哪个输入没有正确插入。在调查您的代码之后。Order.java 中的属性名称与视图页面 orderForm.html 中的属性名称不同例如，在 orderForm 中，属性是name <h3>Deliver my taco masterpieces to...</h3> <label for="name">Name: </label> <input type="text" th:field="*{name}"/>而在 Order.java 中是deliveryName。 @NotBlank(message="Delivery name is required") private String deliveryName;解决方案是在 Order.java 和 orderForm.html 页面中使用相同名称的属性。 -
不负相思意
我想你可以这样做@Controllerpublic class OrderController { @GetMapping("/orders") public String orders(Order order) { return "orderForm"; } @PostMapping("/orders") public String orderForm(@Valid Order order, BindingResult result, Model model) { if(result.hasErrors()) { return "orderForm"; } else { retrun "your_success_view"; } }} -
白猪掌柜的
您th:object="${order}"在orderForm模板中使用，但 Thymeleaf 不知道。你必须像这样将它传递给模板，让 Thymeleaf 知道这个对象@GetMapping("/current")public ModelAndView orderForm() { ModelAndView mv = new ModelAndView("orderForm"); mv.addObject("order", new Order()); return mv;}注意：您必须在模板中使用该对象的所有地方从您的控制器层传递该对象。更新 1同时更新你的发布方法@PostMappingpublic ModelAndView processOrder(@Valid Order order, Errors errors, SessionStatus sessionStatus) { if (errors.hasErrors()) { ModelAndView mv = new ModelAndView("orderForm"); mv.addObject("order", new Order()); return mv; } orderRepo.save(order); sessionStatus.setComplete(); return new ModelAndView("redirect:/");}
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