Question

我正在为我的项目多次使用Hibernate。当我浏览“http://localhost:8080/subject/list”显示列表主题，但后来我看到了这个错误：

信息：HHH000327：执行加载命令时出错： org.hibernate.ObjectNotFoundExc eption：没有给定的行标识符存在：[edu.java.spring.model.Student＃2101]

此处存档Student.java

@XmlRootElement(name="item")
@Entity
@Table(name = "student",uniqueConstraints={@UniqueConstraint(columnNames="id")})
public class Student {
    // @NotBlank
    // @Size(min=2,max=100,message ="Age value is invalid")
    private String name;

    private int id;
    // @Range(min=1,max=150)
    private int age;

    @XmlAttribute
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id", unique = true, nullable = false)
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @XmlElement
    @Column(name = "name", nullable = false, length = 200)
    public String getName() {
        return name;
    }

此处提交Subject.java文件

public class Subject {
//  @Id
//  @GeneratedValue(strategy = GenerationType.IDENTITY)
//  @Column(name = "id", unique = true, nullable = false)
    public int id;
    public String title;
    public Student student;
    public int score;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
//  @Column(name = "title", nullable = false, length = 200)
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
//  @Column(name = "student", nullable = false)
    public Student getStudent() {
        return student;
    }
    public void setStudent(Student student) {
        this.student = student;
    }
//  @Column(name = "score", nullable = false)
    public int getScore() {
        return score;
    }
    public void setScore(int score) {
        this.score = score;
    }

}

此处提交Subject.hbm.xml

<hibernate-mapping>
    <class name="edu.java.spring.model.Subject" table="subject">
        <meta attribute="class-description">
            This class contains the subject detail
        </meta>
        <id name = "id" type = "int" column="id">
            <generator class="native"/>
        </id>
        <property name="title" column="title" type="string"/>
        <many-to-one name="student" column="student"
            class="edu.java.spring.model.Student" not-null="true" lazy="false"/>
        <property name="score" column="score" type="int"/>



    </class>

</hibernate-mapping>

此处提交SubjectController.java

@RequestMapping(value="subject/list",method= RequestMethod.GET)
    public ModelAndView listSubjects(){

        ModelAndView model = new ModelAndView("SubjectList");

        model.addObject("subjects", subjectDao.listSubject());
//      System.out.println("anh yeu em");
        return model;

错误：org.hibernate.ObjectNotFoundException：不存在具有给定标识符的行。如何修复它？

0 个答案: