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:/"; }}
4 回答
慕姐4208626
TA贡献1852条经验 获得超7个赞
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="${#fields.hasErrors('ccCVV')}"
th:errors="*{ccCVV}">CC Num Error</span>
<br/>
<input type="submit" value="Submit order"/>
</form>
</body>
</html>
慕尼黑8549860
TA贡献1818条经验 获得超11个赞
我认为您应该按照书中所述处理 orderForm.html 中所有输入中验证错误的显示，如下所示：（来源 Git）
<!-- tag::allButValidation[] -->
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org">
<head>
<title>Taco Cloud</title>
<link rel="stylesheet" th:href="@{/styles.css}" />
</head>
<body>
<form method="POST" th:action="@{/orders}" th:object="${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="${#fields.hasErrors('ccCVV')}"
th:errors="*{ccCVV}">CC Num Error</span>
<!-- tag::allButValidation[] -->
<br/>
<input type="submit" value="Submit order"/>
</form>
</body>
</html>
<!-- end::allButValidation[] -->
我认为您没有按照本章中解释的添加到 bean 中的验证规则在表单中插入正确的信息。通过显示验证错误，您将在提交订单时确切地知道哪个输入没有正确插入。
在调查您的代码之后。Order.java 中的属性名称与视图页面 orderForm.html 中的属性名称不同
例如，在 orderForm 中，属性是name
<h3>Deliver my taco masterpieces to...</h3>
<label for="name">Name: </label>
<input type="text" th:field="*{name}"/>
而在 Order.java 中是deliveryName。
@NotBlank(message="Delivery name is required")
private String deliveryName;
解决方案是在 Order.java 和 orderForm.html 页面中使用相同名称的属性。
不负相思意
TA贡献1777条经验 获得超10个赞
我想你可以这样做
@Controller
public class OrderController {
@GetMapping("/orders")
public String orders(Order order) {
return "orderForm";
}
@PostMapping("/orders")
public String orderForm(@Valid Order order, BindingResult result, Model model) {
if(result.hasErrors()) {
return "orderForm";
} else {
retrun "your_success_view";
}
}
}
白猪掌柜的
TA贡献1893条经验 获得超10个赞
您th:object="${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
@PostMapping
public 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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