Spring @RequestBody的工作原理

如何获取更多详细信息：

我正在做一个简单的RESTPOST请求，来自邮递员chrome扩展

我的控制器是：

@Controller
@RequestMapping("/theme")
public class ThemeController {

    @RequestMapping(value = "/create", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
    public @ResponseBody
    Status addTheme(@RequestBody Theme theme) {
        try {
            themeServices.addEntity(theme);
            return new Status(1, "Theme added Successfully !");
        } catch (Exception e) {
            // e.printStackTrace();
            return new Status(0, e.toString());
        }

    }

在Theme.java中：

@Entity
@Table(name = "theme", uniqueConstraints = { @UniqueConstraint(columnNames = { "theme_id" }) })
@JsonIgnoreProperties({ "hibernateLazyInitializer", "handler" })
@NamedQuery(name = "Theme.findAll", query = "SELECT t FROM Theme t")
public class Theme implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "theme_id")
    private long themeId;

    private String description;

    private String name;

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "category_id", nullable=true)
    private ThemeCategory themeCategory;

在mecategory.java中：

@Entity
@Table(name = "theme_category", uniqueConstraints = { @UniqueConstraint(columnNames = { "category_id" }) })
@JsonIgnoreProperties({ "hibernateLazyInitializer", "handler" })
@NamedQuery(name = "ThemeCategory.findAll", query = "SELECT t FROM ThemeCategory t")
public class ThemeCategory implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "category_id")
    private long categoryId;

    private String description;

    private String name;

    // bi-directional many-to-one association to Theme
    // @OneToMany(mappedBy="themeCategory")
    @OneToMany(mappedBy = "themeCategory", fetch = FetchType.EAGER)
    @Column(nullable = true)
    @JsonManagedReference
    private Set<Theme> themes;

    // bi-directional many-to-one association to ThemeCategory
    @ManyToOne
    @JoinColumn(name = "parent_category_id", nullable=true)
    @JsonBackReference
    private ThemeCategory parentThemeCategory;

    // bi-directional many-to-one association to ThemeCategory
    // @OneToMany(mappedBy="themeCategory")
    @OneToMany(mappedBy = "parentThemeCategory", fetch = FetchType.EAGER)
    @Column(nullable = true)
    @JsonManagedReference
    private Set<ThemeCategory> themeCategories;

主题表：

CREATE TABLE `theme` (
  `theme_id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(45) NOT NULL,
  `category_id` smallint(5) unsigned NOT NULL,
  `file_path` varchar(200) DEFAULT NULL,
  `description` varchar(1000) DEFAULT NULL,
  `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`theme_id`),
  KEY `idx_category_id` (`category_id`),
  CONSTRAINT `fk_category_id` FOREIGN KEY (`category_id`) REFERENCES `theme_category` (`category_id`) ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=401 DEFAULT CHARSET=utf8;

我正在使用邮差分机拨打rest post电话：

标题参数：

内容类型：application/json

Json正文：

{"description":"theme8","name":"theme8","themeCategory":{"categoryId":302, "themes":[],"parentThemeCategory":{}, "themeCategories":[]}}

并尝试了2个小时左右的多种身体方式。但它一直在说：

服务器拒绝了此请求，因为请求实体的格式不受支持 由请求的方法的请求资源创建

分析一下，我没有得到任何其他东西。在Eclipse控制台中，也没有显示与此问题相关的任何内容

---

怎么了？是否有任何工具可以创建有效的请求。

我尝试了您的代码，使用了相同的请求，效果良好。唯一的区别是，我使用“高级Rest客户端”发送请求。在类别和主题实体之间有一个主题\类别表。其中维护了主题类别和主题。这可能是我发布所有代码的原因。请查看它。为application/json添加一个Accept头，然后重试

{"description":"theme8","name":"theme8","themeCategory":{"categoryId":302, "themes":[],"parentThemeCategory":{}, "themeCategories":[]}}