我正在尝试为以下 URL 创建客户端：http: //florist.herokuapp.com/products/1/categories
应用程序.java
public class Application {
public static void main(String args[]) {
RestTemplate restTemplate = new RestTemplate();
Product product = restTemplate.getForObject(
"http://florist.herokuapp.com/products/1", Product.class);
System.out.println("Name: " + product.getName());//works fine
List<Category> categories = restTemplate.getForObject(
"http://florist.herokuapp.com/products/1/categories", CategoryList.class).getCategories();//throws error
}
}
分类列表.java
@JsonIgnoreProperties(ignoreUnknown = true)
public class CategoryList {
@JsonProperty("_embedded")
private List<Category> categories;
public List<Category> getCategories() {
return categories;
}
public void setCategories(List<Category> categories) {
this.categories = categories;
}
}
类别.java
@JsonIgnoreProperties(ignoreUnknown = true)
public class Category {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
抛出的错误是：
Exception in thread "main" org.springframework.web.client.HttpClientErrorException: 400 Bad Request
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91)
at org.springframework.web.client.RestTemplate.handleResponseError(RestTemplate.java:598)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:556)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:512)
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:243)
at hello.Application.main(Application.java:17)
要在服务器上生成 JSON，我使用 RepositoryRestResource 注释：
@RepositoryRestResource(collectionResourceRel = "categories", path = "categories")
public interface CategoryRepository extends PagingAndSortingRepository<Category, Long> {
List<Category> findByName(@Param("name") String name);
}
和
@RepositoryRestResource(collectionResourceRel = "products", path = "products")
public interface ProductRepository extends PagingAndSortingRepository<Product, Long> {
List<Product> findByNameIgnoringCase(@Param("name") String name);
}