Spring@RequestBody REST服务在某个实体关系中发布方法返回415
我在春休冬眠中工作。 我检查了这些链接,但它们没有解决我的问题 还有更多的帖子 当我的实体中存在这种关系时,post和@RequestBody中就没有问题了 University.javaSpring@RequestBody REST服务在某个实体关系中发布方法返回415,spring,hibernate,jackson,spring-restcontroller,spring-java-config,Spring,Hibernate,Jackson,Spring Restcontroller,Spring Java Config,我在春休冬眠中工作。 我检查了这些链接,但它们没有解决我的问题 还有更多的帖子 当我的实体中存在这种关系时,post和@RequestBody中就没有问题了 University.java public class University extends BaseEntity { private String name; private String address; private String telephon; @OneToMany(fetch =
public class University extends BaseEntity {
private String name;
private String address;
private String telephon;
@OneToMany(fetch = FetchType.LAZY, mappedBy = "university", cascade = CascadeType.ALL)
@JsonManagedReference
private List<Student> students=new ArrayList<>();
// setter an getter
}
但当我将证书实体添加到我的关系时,如下所示
编辑:
Student.java
public class Student extends BaseEntity{
@Column(name = "FIRST_NAME")
private String firstName;
@Column(name = "LAST_NAME")
private String lastName;
@Column(name = "SECTION")
private String section;
@ManyToOne
@JoinColumn(name = "UNIVERSITY_ID",nullable = false)
@JsonBackReference
private University university;
// setter an getter
}
public class Student extends BaseEntity{
@Column(name = "FIRST_NAME")
private String firstName;
@Column(name = "LAST_NAME")
private String lastName;
@Column(name = "SECTION")
private String section;
@ManyToOne
@JoinColumn(name = "UNIVERSITY_ID",nullable = false)
@JsonBackReference
private University university;
// added new relation
@ManyToOne
@JoinColumn(name = "certificateid",nullable = false)
@JsonBackReference
private Certificate certificate;
// setter an getter
}
Certificate.java
public class Certificate extends BaseEntity{
private String name;
@OneToMany(fetch = FetchType.LAZY, mappedBy = "certificate")
@JsonManagedReference
private List<Student> students=new ArrayList<>();
// setter an getter
}
公共类证书扩展BaseEntity{
私有字符串名称;
@OneToMany(fetch=FetchType.LAZY,mappedBy=“certificate”)
@JsonManagedReference
private List students=new ArrayList();
//二传手
}
在这种类型的关系中,我遇到了415错误。在一些帖子中,建议使用@modeldattribute而不是@RequestBody,这样可以解决错误。但由于帖子的缘故,它说它适合在MVC中使用,而不是在rest模板中使用
我的控制器api是:
@RequestMapping(value = "/create3", method = RequestMethod.POST,consumes = {MediaType.APPLICATION_JSON_VALUE})
public ResponseEntity<University> create3( @RequestBody University model) throws Exception {
return new ResponseEntity<University>(this.universityService.add(model), HttpStatus.OK);
}
@RequestMapping(value=“/create3”,method=RequestMethod.POST,consumes={MediaType.APPLICATION\u JSON\u value})
public ResponseEntity create3(@RequestBody大学模型)引发异常{
返回新的ResponseEntity(this.universityService.add(model),HttpStatus.OK);
}
还有我的配置类
@Configuration
@EnableTransactionManagement
@EnableWebMvc
public class moduleConfig extends WebMvcConfigurerAdapter {
@Bean
public ObjectMapper objectMapper(){
ObjectMapper mapper = new ObjectMapper();
Hibernate5Module module = new Hibernate5Module();
module.configure(Hibernate5Module.Feature.FORCE_LAZY_LOADING, false);
mapper.registerModule(module);
//Some other configuration....
return mapper;
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(new MappingJackson2HttpMessageConverter());
super.configureMessageConverters(converters);
}
//configure the output json format
//https://stackoverflow.com/questions/4823358/spring-configure-responsebody-json-format
@Override
public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
for (HttpMessageConverter<?> converter : converters) {
if (converter instanceof AbstractJackson2HttpMessageConverter) {
AbstractJackson2HttpMessageConverter c = (AbstractJackson2HttpMessageConverter) converter;
ObjectMapper objectMapper = c.getObjectMapper();
objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
}
}
super.extendMessageConverters(converters);
}
@Bean
public MappingJackson2HttpMessageConverter jackson2HttpMessageConverter() {
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
converter.setObjectMapper(this.jacksonBuilder().build());
return converter;
}
public Jackson2ObjectMapperBuilder jacksonBuilder() {
Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
Hibernate5Module hibernateModule = new Hibernate5Module();
hibernateModule.configure(Hibernate5Module.Feature.FORCE_LAZY_LOADING, false);
builder.modules(hibernateModule);
// Spring MVC default Objectmapper configuration
builder.featuresToDisable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
builder.featuresToDisable(MapperFeature.DEFAULT_VIEW_INCLUSION);
return builder;
}
@Bean
public ViewResolver viewResolver() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setViewClass(JstlView.class);
viewResolver.setSuffix(".jsp");
return viewResolver;
}
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
}
@配置
@启用事务管理
@EnableWebMvc
公共类moduleConfig扩展WebMVCConfigureAdapter{
@豆子
公共对象映射器对象映射器(){
ObjectMapper mapper=新的ObjectMapper();
Hibernate5模块=新的Hibernate5模块();
module.configure(Hibernate5Module.Feature.FORCE\u LAZY\u加载,false);
映射器注册表模块(模块);
//其他一些配置。。。。
返回映射器;
}
@凌驾
public void configureMessageConverters(列表>转换器){
用于(HttpMessageConverter转换器:转换器){
if(AbstractJackson2HttpMessageConverter的转换器实例){
AbstractJackson2HttpMessageConverter c=(AbstractJackson2HttpMessageConverter)转换器;
ObjectMapper ObjectMapper=c.getObjectMapper();
objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
}
}
超级扩展消息转换器(转换器);
}
@豆子
公共映射jackson2HttpMessageConverter jackson2HttpMessageConverter(){
MappingJackson2HttpMessageConverter=新的MappingJackson2HttpMessageConverter();
setObjectMapper(this.jacksonBuilder().build());
回流转换器;
}
公共Jackson2ObjectMapperBuilder jacksonBuilder(){
Jackson2ObjectMapperBuilder=新Jackson2ObjectMapperBuilder();
Hibernate5Module hibernateModule=新的Hibernate5Module();
hibernateModule.configure(Hibernate5Module.Feature.FORCE_LAZY_LOADING,false);
builder.modules(hibernateModule);
//Spring MVC默认Objectmapper配置
featuresToDisable(反序列化功能。未知属性失败);
builder.featuresToDisable(MapperFeature.DEFAULT\u VIEW\u INCLUSION);
返回生成器;
}
@豆子
公共ViewResolver ViewResolver(){
InternalResourceViewResolver viewResolver=新的InternalResourceViewResolver();
setViewClass(JstlView.class);
setSuffix(“.jsp”);
返回视图解析器;
}
@凌驾
公共无效配置DefaultServletHandling(DefaultServletHandlerConfigurer-configurer){
configurer.enable();
}
}
}
1.实体关系如何导致我的帖子方法出现问题
2.我的代码中缺少什么来正确执行它
感谢您的帮助和建议
Jackson不支持一个实体类上的多个
@JsonBackReference
,除非对它们进行专门命名(每个相关实体都有一个默认名称)
为每个关系设置特定名称,如:
@JsonManagedReference(value = "a_name")
@JsonBackReference(value = "a_name")
问题来自JSON(以及任何面向文档的数据)的格式,该格式不允许一个节点有多个父节点。您可以添加JSON发送到服务器吗?服务器是否抛出异常?如果是,也添加它{“name”:“name”,“address”:“address”,“telephon”:“telephon”}我在服务器端添加了postman pictureNo堆栈跟踪?无论如何,Jackson在一个实体上不支持多个@JsonBackReference而不命名它们(我想这就是为什么添加第二个实体时它停止工作的原因)。尝试为每个关系添加一个唯一的名称@Baptiste Beauvais感谢您的宝贵评论,在为每个关系命名后,它都起到了作用。