Question

ToString对象内容与调试视图中的内容不同和与JSON格式不同。 CategoryRelations表内容

categoryId | parentId
17         | 1

类别表格内容

categoryId 
1
17

这是我用父母选择的Java代码

getSessionFactory().getCurrentSession().createCriteria(Category.class).add(
Restrictions.eq("parent", new Category(parentId))).list();

调试模式下toString的结果

Category{id=17, parent=Category{id=1, parent=null}}

调试视图的Json结果和结果（但它以其他格式表示）

[{"id":17,"name":"Seventeenth category","image":"17.png","parent":{"id":0},"children":[]}]

类别Java代码

@Entity
@Table(name = "CATEGORY")
public class Category implements NamedModel{
    @Id
    @Column(name = "CATEGORY_ID")
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
    @OneToOne(cascade = CascadeType.REMOVE, fetch = FetchType.LAZY)
    @JoinTable(name = "CATEGORY_RELATIONS",
        joinColumns = {
                @JoinColumn(name = "CATEGORY_RELATIONS_CATEGORY_ID", referencedColumnName = "CATEGORY_ID")},
        inverseJoinColumns = {
                @JoinColumn(name = "CATEGORY_RELATIONS_PARENT_ID", referencedColumnName = "CATEGORY_ID")})
    private Category parent;
    @OneToMany(cascade = CascadeType.REMOVE, fetch = FetchType.EAGER, mappedBy = "parent")
    private List<Category> children;//...

    @Override
    public String toString() {
        return "Category{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", image='" + image + '\'' +
                ", parent=" + parent +
                '}';
    }
}

控制器

@RestController
@RequestMapping("/category")
public class CategoryController {//...
    @ResponseBody
    @RequestMapping(value = "/parentId/{id}", method = GET)
    public List<Category> getByParentId(@PathVariable Long id) throws Exception {
        return categoryDAO.getByParentId(id);
    }
}

弹簧

4.2.6.RELEASE

GSON

'com.google.code.gson:gson:2.6.2'

CategoryRelations Java代码

@Entity
@Table(name = "CATEGORY_RELATIONS")
@IdClass(CategoryRelations.CategoryRelationsPrimaryKey.class)
public class CategoryRelations implements Serializable {
    @Id
    @Column(name = "CATEGORY_RELATIONS_CATEGORY_ID")
    private long categoryId;
    @Id
    @Column(name = "CATEGORY_RELATIONS_PARENT_ID")
    private long parentId;

    @Entity
    @IdClass(CategoryRelationsPrimaryKey.class)
    public static class CategoryRelationsPrimaryKey implements Serializable    {
        private long categoryId;
        private long parentId;
    }
}

ToString对象内容与调试视图中的内容不同

0 个答案: