英文:
Unable to render thymleaf page from Spring-Boot controller. Prints only the return string in output
问题
问题: 我已经开发了一个可以从POSTMAN调用的Spring-Boot REST API。现在我想从Thymleaf页面请求同样的REST API方法。但页面只呈现一个字符串。实际页面没有加载。
这是我的**控制器**:
@RestController
@RefreshScope
@RequestMapping("/shopping")
public class ShoppingController {
@RequestMapping(value="/productList")
public String listAllProducts(ModelMap model){
logger.info("ShoppingMS : listAllProducts()");
ResponseEntity<List<Product>> responseProductList = prodServ.listAllProducts();
List<Product> products = responseProductList.getBody();
if(products.isEmpty()) {
logger.info("No Products Found");
}
logger.info("No of products fetched : " +products.size());
model.addAttribute("products", products);
return "productList";
}
}
这是我的**Thymleaf**页面`productsList.html`:
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4">
<head>
<meta charset="UTF-8">
<title>Product List</title>
<link rel="stylesheet" type="text/css" th:href="@{/css/styles.css}">
</head>
<body>
<th:block th:include="/_header"></th:block>
<th:block th:include="/menu"></th:block>
<div class="page-title">Product List</div>
<div class="product-preview-container"
th:each="prodInfo : ${products.list}">
<ul>
<li>Product Code: <span th:utext="${prodInfo.productCode}"></span></li>
<li>Product Name: <span th:utext="${prodInfo.productName}"></span></li>
<li>Product Price: <span th:utext="${#numbers.formatDecimal(prodInfo.productPrice,3,2,'COMMA')}"></span></li>
<li><a th:href="@{|/buyProduct?code=${prodInfo.code}|}">Buy Now</a></li>
</ul>
</div>
<br />
<div class="page-navigator">
<th:block th>
<a th:href="@{|/productList|}" class="nav-item"></a>
<span class="nav-item" > ... </span>
</th:block>
</div>
<th:block th:include="/_footer"></th:block>
</body>
</html>
**Thymleaf的Maven依赖**
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
**项目结构图像**
[![enter image description here][1]][1]
[1]: https://i.stack.imgur.com/5bkK7.png
**输出**:
调用URL: http://localhost:1000/shopping/productList
页面仅返回字符串 `productList`。
请告诉我我在哪里出错了。我能够呈现一个index.html页面，但是不能呈现这个页面。
英文:
Issue : I have developed a Spring-Boot rest api which I can call from POSTMAN. Now I am requesting the same REST API method from a Thymleaf page. But it renders only a string. The actual page doesn't gets loaded..
This is my controller :
@RestController
@RefreshScope
@RequestMapping("/shopping")
public class ShoppingController {
@RequestMapping(value="/productList")
public String listAllProducts(ModelMap model){
logger.info("ShoppingMS : listAllProducts()");
ResponseEntity<List<Product>> responseProductList = prodServ.listAllProducts();
List<Product> products = responseProductList.getBody();
if(products.isEmpty()) {
logger.info("No Products Found");
}
logger.info("No of products fetched : " +products.size());
model.addAttribute("products", products);
return "productList";
}
}
This is my Thymleaf page productsList.html :
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4">
<head>
<meta charset="UTF-8">
<title>Product List</title>
<link rel="stylesheet" type="text/css" th:href="@{/css/styles.css}">
</head>
<body>
<th:block th:include="/_header"></th:block>
<th:block th:include="/menu"></th:block>
<div class="page-title">Product List</div>
<div class="product-preview-container"
th:each="prodInfo : ${products.list}">
<ul>
<li>Product Code: <span th:utext="${prodInfo.productCode}"></span></li>
<li>Product Name: <span th:utext="${prodInfo.productName}"></span></li>
<li>Product Price: <span th:utext="${#numbers.formatDecimal(prodInfo.productPrice,3,2,'COMMA')}"></span></li>
<li><a th:href="@{|/buyProduct?code=${prodInfo.code}|}">Buy Now</a></li>
</ul>
</div>
<br />
<div class="page-navigator">
<th:block th>
<a th:href="@{|/productList|}" class="nav-item"></a>
<span class="nav-item" > ... </span>
</th:block>
</div>
<th:block th:include="/_footer"></th:block>
</body>
</html>
Maven Dependency for Thymleaf
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
Project Structure Image
Output :
Calling URL : http://localhost:1000/shopping/productList
It returns only the string `productList` in the page.
Please tell me where I am doing wrong. I am able to render a index.html page. But not this page.
答案1
得分: 2
这是因为您在控制器的顶部使用了 @RestController 注解，它等同于 @Controller+@ResponseBody。
尝试仅使用 @Controller，然后根据您的方法使用 @ResponseBody。
例如，如果您想返回 JSON 响应主体，则在方法上使用 @ResponseBody。
如果您想渲染 Thymeleaf 页面，则不要使用 @ResponseBody。
英文:
That's because you are using @RestController annotation on top of your controller, which is nothing but @Controller+@ResponseBody.
Try to use only @Controller and then based on your method use @ResponseBody exclusively.
For example . If you want to return json response body then use @ResponseBody on method.
If you want to render thymeleaf page then don't use @ResponseBody.
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