Java 使用spring-boot-2.2.1移除嵌入HATEOAS链接中的
我正在使用spring-boot-2.2.1和spring-HATEOAS。超媒体链接工作正常,但是 我在返回链接时看到Java 使用spring-boot-2.2.1移除嵌入HATEOAS链接中的,java,spring,spring-boot,spring-data-mongodb,spring-hateoas,Java,Spring,Spring Boot,Spring Data Mongodb,Spring Hateoas,我正在使用spring-boot-2.2.1和spring-HATEOAS。超媒体链接工作正常,但是 我在返回链接时看到\u embedded属性,请在github中查找以下代码以供参考和项目 端点: a) 将返回CollectionModel=>localhost:8099/api/v1/capability/list/noembedded 及 b) 将返回Listlocalhost:8099/api/v1/Capability/List/ <?xml version="1.0" enc
\u embedded
属性,请在github中查找以下代码以供参考和项目
端点:
a) 将返回CollectionModel
=>localhost:8099/api/v1/capability/list/noembedded
及
b) 将返回List<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>spring-boot-unittest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-boot-unittest</name>
<description>Demo project for Spring Boot unit test</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-hateoas</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-mongodb</artifactId>
<version>4.1.4</version>
</dependency>
<dependency>
<groupId>com.querydsl</groupId>
<artifactId>querydsl-apt</artifactId>
<version>4.1.4</version>
</dependency>
<!-- Embedded MongoDB for Testing -->
<dependency>
<groupId>de.flapdoodle.embed</groupId>
<artifactId>de.flapdoodle.embed.mongo</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-ui</artifactId>
<version>1.2.21</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>com.mysema.maven</groupId>
<artifactId>apt-maven-plugin</artifactId>
<version>1.1.3</version>
<executions>
<execution>
<goals>
<goal>process</goal>
</goals>
<configuration>
<outputDirectory>target/generated-sources/java</outputDirectory>
<!--<processor>com.querydsl.mongodb.morphia.MorphiaAnnotationProcessor</processor>-->
<processor>org.springframework.data.mongodb.repository.support.MongoAnnotationProcessor</processor>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
预期答复:
[
{
"id": "sample",
"techStack": "Java",
"numOfDevelopers": 25,
"numOfAvailableDevelopers": 10,
"_links": {
"getThisCapability": {
"href": "http://localhost:8099/api/v1/capability/sample"
},
"getAllCapabilities": {
"href": "http://localhost:8099/api/v1/capability/list"
}
}
}
]
我试过了
spring.data.rest.defaultMediaType=application/json
使用hal作为默认json媒体类型=false
但是运气不好,我仍然能够在响应中看到\u嵌入的属性。
有谁能帮我确定这个问题吗
在此之前,我使用的是spring-boot-1.5.10
,我能够在不嵌入\u的情况下正确呈现链接,请参阅
在我在主类中添加了下面的注释之后,如果我返回列表,它就可以正常工作了
@EnableHypermediaSupport(type=EnableHypermediaSupport.HypermediaType.HAL)
localhost:9771/api/v1/capability/list
这将产生以下结果:
[
{
"capabilityId": "sample",
"techStack": "Java",
"numOfDevelopers": 25,
"numOfAvailableDevelopers": 10,
"_links": {
"getThisCapability": {
"href": "http://localhost:9771/api/v1/capability/sample"
},
"getAllCapabilities": {
"href": "http://localhost:9771/api/v1/capability/list"
}
}
}
]
不幸的是,它在最新版本中不起作用。
任何帮助都将不胜感激。如果我理解正确,这将是无效的HAL,这就是为什么Spring HATEOAS不会产生此结果,只要您在请求中返回CollectionModel
。请注意,集合也可能有链接,链接将位于\u links
属性中嵌入的\u属性旁边,如中所示
如果您真的想去掉\u embedded
属性并生成一个EntityModel
列表,那么如果您修改代码以返回一个列表,它应该可以工作。然后,您将丢失Spring HATEOAS生成的\u嵌入式
和\u链接
属性。以下是修改后的代码段:
@RestController
@RequestMapping(value = "/api/v1/capability")
@RequiredArgsConstructor
@CrossOrigin
public class CapabilityController {
private final CapabilityService capabilityService;
private final CapabilityResourceAssembler capabilityResourceAssembler;
@GetMapping(value = "/list")
public List<EntityModel<Capability>> getAllCapabilities() {
List<EntityModel<Capability>> capabilities = capabilityService.listCapabilities().stream()
.map(capability -> new EntityModel<>(capability,
linkTo(methodOn(CapabilityController.class).getCapabilityById(capability.getId())).withRel("getThisCapability"),
linkTo(methodOn(CapabilityController.class).getAllCapabilities()).withRel("getAllCapabilities")
)).collect(Collectors.toList());
return capabilities;
}
}
@RestController
@请求映射(value=“/api/v1/capability”)
@所需参数构造函数
@交叉起源
公共类能力控制器{
私人最终能力服务能力服务;
私人最终能力资源装配商能力资源装配商;
@GetMapping(value=“/list”)
公共列表getAllCapabilities(){
列表功能=capabilityService.listCapabilities().stream()
.map(能力->新实体模型(能力,
链接到(methodOn(CapabilityController.class).getCapabilityById(capability.getId()).withRel(“getThisCapability”),
链接到(methodOn(CapabilityController.class).getAllCapabilities()).withRel(“getAllCapabilities”)
)).collect(Collectors.toList());
返回能力;
}
}
我强烈建议你不要这样做,因为你失去了春夏的好处
此外,我建议您使用capabilityresourcesembler
,并通过使用capabilityresourcesembler.toModel(…)
创建EntityModel
实例,这样您就不必重复在.map(…)中实现的代码
函数。如果我理解正确,这将是无效的HAL,这就是为什么只要在请求中返回CollectionModel
,Spring HATEOAS就不会产生此结果。请注意,集合也可能有链接,链接将位于\u links
属性中嵌入的\u属性旁边,如中所示
如果您真的想去掉\u embedded
属性并生成一个EntityModel
列表,那么如果您修改代码以返回一个列表,它应该可以工作。然后,您将丢失Spring HATEOAS生成的\u嵌入式
和\u链接
属性。以下是修改后的代码段:
@RestController
@RequestMapping(value = "/api/v1/capability")
@RequiredArgsConstructor
@CrossOrigin
public class CapabilityController {
private final CapabilityService capabilityService;
private final CapabilityResourceAssembler capabilityResourceAssembler;
@GetMapping(value = "/list")
public List<EntityModel<Capability>> getAllCapabilities() {
List<EntityModel<Capability>> capabilities = capabilityService.listCapabilities().stream()
.map(capability -> new EntityModel<>(capability,
linkTo(methodOn(CapabilityController.class).getCapabilityById(capability.getId())).withRel("getThisCapability"),
linkTo(methodOn(CapabilityController.class).getAllCapabilities()).withRel("getAllCapabilities")
)).collect(Collectors.toList());
return capabilities;
}
}
@RestController
@请求映射(value=“/api/v1/capability”)
@所需参数构造函数
@交叉起源
公共类能力控制器{
私人最终能力服务能力服务;
私人最终能力资源装配商能力资源装配商;
@GetMapping(value=“/list”)
公共列表getAllCapabilities(){
列表功能=capabilityService.listCapabilities().stream()
.map(能力->新实体模型(能力,
链接到(methodOn(CapabilityController.class).getCapabilityById(capability.getId()).withRel(“getThisCapability”),
链接到(methodOn(CapabilityController.class).getAllCapabilities()).withRel(“getAllCapabilities”)
)).collect(Collectors.toList());
返回能力;
}
}
我强烈建议你不要这样做,因为你失去了春夏的好处
此外,我建议您使用功能资源Sembler
,通过使用功能资源Sembler.toModel(…)
创建实体模型
实例,这样您就不必重复在.map(…)
函数中实现的代码。使用Spring Boot 1.5时,您依赖于Spring HATEOAS的限制,这导致JacksonObjectMapper
被用作应用程序范围的ObjectMapper
,该对象映射器是特定于HAL的。这种污染意味着HAL格式在不应该应用的情况下应用于响应
Spring HATEOAS 1.0解决了这一限制,其特定于HAL的ObjectMapper
不再污染整个应用程序。如果您希望主应用程序ObjectMapper
应用HAL样式的序列化,您可以通过自定义它来选择返回:
@Bean
public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder,
HypermediaMappingInformation mappingInformation) {
ObjectMapper objectMapper = builder.build();
mappingInformation.configureObjectMapper(objectMapper);
return objectMapper;
}
虽然我认为上述方法会奏效,但我将回应他们在答复中提出的对答复格式和内容的关注
@Bean
public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder,
HypermediaMappingInformation mappingInformation) {
ObjectMapper objectMapper = builder.build();
mappingInformation.configureObjectMapper(objectMapper);
return objectMapper;
}
public class CustomCollectionModel<T> extends CollectionModel<CollectionModel<T>> {
@JsonValue
private Collection<T> content;
protected CustomCollectionModel() {
this(new ArrayList<>());
}
public CustomCollectionModel(Iterable<T> content, Link... links) {
this(content, Arrays.asList(links));
}
public CustomCollectionModel(Iterable<T> content, Iterable<Link> links) {
Assert.notNull(content, "Content must not be null!");
this.content = new ArrayList<>();
for (T element : content) {
this.content.add(element);
}
this.add(links);
}}
@Override
public CustomCollectionModel toCollectionModel(Iterable<? extends T> entities) {
List<EntityModel<T>> resourceList = new ArrayList<>();
for (T entity : entities) {
resourceList.add(toModel(entity));
}
return new CustomCollectionModel(resourceList);
}