org.hibernate.exception.ConstraintViolationException：重复的条目键“主要”

Question

我有有一个多对多的映射与作者类书类。 所以在数据库中，表格是：Book -------- Book_Author ------- Author。 Book_Author包含两个Book_Id和Author_Id列。 现在每当应用程序是有在保存或更新，但做任何有重复的主键例外对应插入“重复重点‘主要’入口‘123-147’”这个操作第二次没问题操作发生两次 - 一次是针对当前选择的作者的值，另一次是针对先前请求的值。 我在记录器中使用了trace来检测变量的值。该日志如下：

SQL:104 - update Book set Availability=?, Copies_Issued=?, Description=?, Image=?, In_Stock=?, Isbn=?, Published_Year=?, Publisher_Name=?, status=?, Title=?, Total_Stock=? where Book_Id=? 
BasicBinder:83 - binding parameter [1] as [VARCHAR] - AVAILABLE 
BasicBinder:83 - binding parameter [2] as [INTEGER] - 0 
BasicBinder:83 - binding parameter [3] as [VARCHAR] - Test description 
BasicBinder:83 - binding parameter [4] as [VARCHAR] - 1414741446090.jpg 
BasicBinder:83 - binding parameter [5] as [INTEGER] - 123 
BasicBinder:71 - binding parameter [6] as [VARCHAR] - <null> 
BasicBinder:83 - binding parameter [7] as [INTEGER] - 2014 
BasicBinder:83 - binding parameter [8] as [VARCHAR] - Test pub. 
BasicBinder:71 - binding parameter [9] as [VARCHAR] - <null> 
BasicBinder:83 - binding parameter [10] as [VARCHAR] - Test book 12 
BasicBinder:83 - binding parameter [11] as [INTEGER] - 123 
BasicBinder:83 - binding parameter [12] as [INTEGER] - 123 
SQL:104 - delete from Book_Author where Book_Id=? 
BasicBinder:83 - binding parameter [1] as [INTEGER] - 123 
SQL:104 - insert into Book_Author (Book_Id, Author_Id) values (?, ?) 
BasicBinder:83 - binding parameter [1] as [INTEGER] - 123 
BasicBinder:83 - binding parameter [2] as [INTEGER] - 147 
SQL:104 - insert into Book_Author (Book_Id, Author_Id) values (?, ?) 
BasicBinder:83 - binding parameter [1] as [INTEGER] - 123 
BasicBinder:83 - binding parameter [2] as [INTEGER] - 147 
SqlExceptionHelper:143 - SQL Error: 1062, SQLState: 23000 
SqlExceptionHelper:144 - Duplicate entry '123-147' for key 'PRIMARY' 
GenericDaoImpl:100 - Update operation FAILED org.hibernate.exception.ConstraintViolationException: Duplicate entry '123-147' for key 'PRIMARY' 
HibernateFactory:133 - rolling back transaction 
HibernateFactory:117 - closing session 
AbstractBatchImpl:205 - HHH000010: On release of batch it still contained JDBC statements 

现在，因为它可以看出，第一个是123147，因为有更新上我没有改变AUTHORNAME，第二个是因为我在以前的请求，这是为改变它第一次申请已经结束。

书类如下：

package com.dao.dto; 

import java.util.HashSet; 
import java.util.Set; 

import javax.persistence.CascadeType; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.FetchType; 
import javax.persistence.GeneratedValue; 
import javax.persistence.Id; 
import javax.persistence.JoinColumn; 
import javax.persistence.JoinTable; 
import javax.persistence.ManyToMany; 
import javax.persistence.OneToMany; 
import javax.persistence.Transient; 

import org.codehaus.jackson.annotate.JsonManagedReference; 
import org.hibernate.annotations.Fetch; 
import org.hibernate.annotations.FetchMode; 
import org.springframework.web.multipart.MultipartFile; 

// TODO: Auto-generated Javadoc 
/** 
* The Class Book. 
*/ 
@Entity 
public class Book implements java.io.Serializable { 

    /** The Constant serialVersionUID. */ 
    private static final long serialVersionUID = 1L; 

    /** The book id. */ 
    private int bookId; 

    /** The title. */ 
    private String title; 

    /** The isbn. */ 
    private String isbn; 

    /** The image. */ 
    private String image; 

    /** The in stock. */ 
    private int inStock; 

    /** The copies issued. */ 
    private int copiesIssued; 

    /** The published year. */ 
    private int publishedYear; 

    /** The publisher name. */ 
    private String publisherName; 

    /** The description. */ 
    private String description; 

    /** The availability. */ 
    private String availability; 

    /** The total stock. */ 
    private int totalStock; 

    /** The file. */ 
    private MultipartFile file; 

    private String status; 

    /** The authors. */ 
    private Set<Author> authors = new HashSet<Author>(0); 

    /** The categories. */ 
    private Set<Category> categories = new HashSet<Category>(0); 

    /** The languages. */ 
    private Set<Language> languages = new HashSet<Language>(0); 

    /** The users favorite. */ 
    private Set<User> usersFavorite = new HashSet<User>(0); 

    /** The return requests. */ 
    private Set<ReturnRequest> returnRequests = new HashSet<ReturnRequest>(0); 

    /** The delivery requests. */ 
    private Set<DeliveryRequest> deliveryRequests = new HashSet<DeliveryRequest>(
      0); 

    /** 
    * Gets the book id. 
    * 
    * @return the book id 
    */ 
    @Id 
    @GeneratedValue 
    @Column(name = "Book_Id") 
    public int getBookId() { 
     return bookId; 
    } 

    /** 
    * Sets the book id. 
    * 
    * @param bookId 
    *   the new book id 
    */ 
    public void setBookId(int bookId) { 
     this.bookId = bookId; 
    } 

    /** 
    * Gets the title. 
    * 
    * @return the title 
    */ 
    @Column(name = "Title") 
    public String getTitle() { 
     return title; 
    } 

    /** 
    * Sets the title. 
    * 
    * @param title 
    *   the new title 
    */ 
    public void setTitle(String title) { 
     this.title = title; 
    } 

    /** 
    * Gets the copies issued. 
    * 
    * @return the copies issued 
    */ 
    @Column(name = "Copies_Issued") 
    public int getCopiesIssued() { 
     return copiesIssued; 
    } 

    /** 
    * Sets the copies issued. 
    * 
    * @param copiesIssued 
    *   the new copies issued 
    */ 
    public void setCopiesIssued(int copiesIssued) { 
     this.copiesIssued = copiesIssued; 
    } 



    public String getStatus() { 
     return status; 
    } 

    public void setStatus(String status) { 
     this.status = status; 
    } 

    /** 
    * Gets the isbn. 
    * 
    * @return the isbn 
    */ 
    @Column(name = "Isbn") 
    public String getIsbn() { 
     return isbn; 
    } 

    /** 
    * Sets the isbn. 
    * 
    * @param isbn 
    *   the new isbn 
    */ 
    public void setIsbn(String isbn) { 
     this.isbn = isbn; 
    } 

    /** 
    * Gets the image. 
    * 
    * @return the image 
    */ 
    @Column(name = "Image") 
    public String getImage() { 
     return image; 
    } 

    /** 
    * Sets the image. 
    * 
    * @param image 
    *   the new image 
    */ 
    public void setImage(String image) { 
     this.image = image; 
    } 

    /** 
    * Gets the in stock. 
    * 
    * @return the in stock 
    */ 
    @Column(name = "In_Stock") 
    public int getInStock() { 
     return inStock; 
    } 

    /** 
    * Sets the in stock. 
    * 
    * @param inStock 
    *   the new in stock 
    */ 
    public void setInStock(int inStock) { 
     this.inStock = inStock; 
    } 

    /** 
    * Gets the total stock. 
    * 
    * @return the total stock 
    */ 
    @Column(name = "Total_Stock") 
    public int getTotalStock() { 
     return totalStock; 
    } 

    /** 
    * Sets the total stock. 
    * 
    * @param totalStock 
    *   the new total stock 
    */ 
    public void setTotalStock(int totalStock) { 
     this.totalStock = totalStock; 
    } 

    /** 
    * Gets the published year. 
    * 
    * @return the published year 
    */ 
    @Column(name = "Published_Year") 
    public int getPublishedYear() { 
     return publishedYear; 
    } 

    /** 
    * Sets the published year. 
    * 
    * @param publishedYear 
    *   the new published year 
    */ 
    public void setPublishedYear(int publishedYear) { 
     this.publishedYear = publishedYear; 
    } 

    /** 
    * Gets the publisher name. 
    * 
    * @return the publisher name 
    */ 
    @Column(name = "Publisher_Name") 
    public String getPublisherName() { 
     return publisherName; 
    } 

    /** 
    * Sets the publisher name. 
    * 
    * @param publisherName 
    *   the new publisher name 
    */ 
    public void setPublisherName(String publisherName) { 
     this.publisherName = publisherName; 
    } 

    /** 
    * Gets the description. 
    * 
    * @return the description 
    */ 
    @Column(name = "Description") 
    public String getDescription() { 
     return description; 
    } 

    /** 
    * Sets the description. 
    * 
    * @param description 
    *   the new description 
    */ 
    public void setDescription(String description) { 
     this.description = description; 
    } 

    /** 
    * Gets the availability. 
    * 
    * @return the availability 
    */ 
    @Column(name = "Availability") 
    public String getAvailability() { 
     return availability; 
    } 

    /** 
    * Sets the availability. 
    * 
    * @param availability 
    *   the new availability 
    */ 
    public void setAvailability(String availability) { 
     this.availability = availability; 
    } 

    /** 
    * Gets the authors. 
    * 
    * @return the authors 
    */ 
    @JsonManagedReference 
    @ManyToMany(fetch = FetchType.EAGER) 
    @JoinTable(name = "Book_Author", joinColumns = { @JoinColumn(name = "Book_Id", nullable = false) }, inverseJoinColumns = { @JoinColumn(name = "Author_Id", nullable = false) }) 
    public Set<Author> getAuthors() { 
     return authors; 
    } 

    /** 
    * Sets the authors. 
    * 
    * @param authors 
    *   the new authors 
    */ 
    public void setAuthors(Set<Author> authors) { 
     this.authors = authors; 
    } 

    /** 
    * Gets the categories. 
    * 
    * @return the categories 
    */ 
    @JsonManagedReference 
    @ManyToMany(fetch = FetchType.EAGER) 
    @JoinTable(name = "Book_Category", joinColumns = { @JoinColumn(name = "Book_Id", nullable = false) }, inverseJoinColumns = { @JoinColumn(name = "Category_Id", nullable = false) }) 
    public Set<Category> getCategories() { 
     return categories; 
    } 

    /** 
    * Sets the categories. 
    * 
    * @param categories 
    *   the new categories 
    */ 
    public void setCategories(Set<Category> categories) { 
     this.categories = categories; 
    } 

    /** 
    * Gets the languages. 
    * 
    * @return the languages 
    */ 
    @ManyToMany(fetch = FetchType.EAGER) 
    @JoinTable(name = "Book_Language", joinColumns = { @JoinColumn(name = "Book_Id", nullable = false) }, inverseJoinColumns = { @JoinColumn(name = "Language_Id", nullable = false) }) 
    public Set<Language> getLanguages() { 
     return languages; 
    } 

    /** 
    * Sets the languages. 
    * 
    * @param languages 
    *   the new languages 
    */ 
    public void setLanguages(Set<Language> languages) { 
     this.languages = languages; 
    } 

    /** 
    * Gets the users favorite. 
    * 
    * @return the users favorite 
    */ 
    @ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL) 
    @JoinTable(name = "User_Favorite", joinColumns = { @JoinColumn(name = "Book_Id", nullable = false) }, inverseJoinColumns = { @JoinColumn(name = "User_Id", nullable = false) }) 
    public Set<User> getUsersFavorite() { 
     return usersFavorite; 
    } 

    /** 
    * Sets the users favorite. 
    * 
    * @param usersFavorite 
    *   the new users favorite 
    */ 
    public void setUsersFavorite(Set<User> usersFavorite) { 
     this.usersFavorite = usersFavorite; 
    } 

    /** 
    * Gets the file. 
    * 
    * @return the file 
    */ 
    @Transient 
    public MultipartFile getFile() { 
     return file; 
    } 

    /** 
    * Sets the file. 
    * 
    * @param file 
    *   the new file 
    */ 
    public void setFile(MultipartFile file) { 
     this.file = file; 
    } 

    /* 
    * (non-Javadoc) 
    * 
    * @see java.lang.Object#toString() 
    */ 
    @Override 
    public String toString() { 
     return getTitle(); 
    } 

    /** 
    * Gets the return requests. 
    * 
    * @return the return requests 
    */ 
    @OneToMany(fetch = FetchType.EAGER, mappedBy = "book") 
    public Set<ReturnRequest> getReturnRequests() { 
     return returnRequests; 
    } 

    /** 
    * Sets the return requests. 
    * 
    * @param returnRequests 
    *   the new return requests 
    */ 
    public void setReturnRequests(Set<ReturnRequest> returnRequests) { 
     this.returnRequests = returnRequests; 
    } 

    /** 
    * Gets the delivery requests. 
    * 
    * @return the delivery requests 
    */ 
    @OneToMany(fetch = FetchType.EAGER, mappedBy = "book") 
    public Set<DeliveryRequest> getDeliveryRequests() { 
     return deliveryRequests; 
    } 

    /** 
    * Sets the delivery requests. 
    * 
    * @param deliveryRequests 
    *   the new delivery requests 
    */ 
    public void setDeliveryRequests(Set<DeliveryRequest> deliveryRequests) { 
     this.deliveryRequests = deliveryRequests; 
    } 

    /* 
    * (non-Javadoc) 
    * 
    * @see java.lang.Object#hashCode() 
    */ 
    @Override 
    public int hashCode() { 
     final int prime = 31; 
     int result = 1; 
     result = prime * result + bookId; 
     return result; 
    } 

    /* 
    * (non-Javadoc) 
    * 
    * @see java.lang.Object#equals(java.lang.Object) 
    */ 
    @Override 
    public boolean equals(Object obj) { 
     if (this == obj) { 
      return true; 
     } 
     if (obj == null) { 
      return false; 
     } 
     if (getClass() != obj.getClass()) { 
      return false; 
     } 
     Book other = (Book) obj; 
     if (bookId != other.bookId) { 
      return false; 
     } 
     return true; 
    } 

} 

Author类如下：

package com.dao.dto; 

import java.io.Serializable; 
import java.util.HashSet; 
import java.util.Set; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.FetchType; 
import javax.persistence.GeneratedValue; 
import javax.persistence.Id; 
import javax.persistence.JoinColumn; 
import javax.persistence.JoinTable; 
import javax.persistence.ManyToMany; 
import javax.persistence.Table; 

import org.codehaus.jackson.annotate.JsonBackReference; 
import org.hamcrest.Factory; 
import org.hibernate.annotations.Fetch; 
import org.hibernate.annotations.FetchMode; 

// TODO: Auto-generated Javadoc 
/** 
* The Class Author. 
*/ 
@Entity 
@Table(name = "Author") 
public class Author implements Serializable { 

    /** The Constant serialVersionUID. */ 
    private static final long serialVersionUID = 1L; 

    /** The author id. */ 
    private int authorId; 

    /** The author name. */ 
    private String authorName; 

    /** The description. */ 
    private String description; 

    /** The books. */ 
    private Set<Book> books = new HashSet<Book>(0); 

    /** 
    * Gets the author id. 
    * 
    * @return the author id 
    */ 
    @Id 
    @GeneratedValue 
    @Column(name = "Author_Id") 
    public int getAuthorId() { 
     return authorId; 
    } 

    /** 
    * Sets the author id. 
    * 
    * @param authorId 
    *   the new author id 
    */ 
    public void setAuthorId(int authorId) { 
     this.authorId = authorId; 
    } 

    /** 
    * Gets the author name. 
    * 
    * @return the author name 
    */ 
    @Column(name = "Author_Name", nullable = false) 
    public String getAuthorName() { 
     return authorName; 
    } 

    /** 
    * Sets the author name. 
    * 
    * @param authorName 
    *   the new author name 
    */ 
    public void setAuthorName(String authorName) { 
     this.authorName = authorName; 
    } 

    /** 
    * Gets the description. 
    * 
    * @return the description 
    */ 
    @Column(name = "Description") 
    public String getDescription() { 
     return description; 
    } 

    /** 
    * Sets the description. 
    * 
    * @param description 
    *   the new description 
    */ 
    public void setDescription(String description) { 
     this.description = description; 
    } 

    /* 
    * (non-Javadoc) 
    * 
    * @see java.lang.Object#toString() 
    */ 
    public String toString() { 
     return getAuthorName(); 
    } 

    /** 
    * Gets the books. 
    * 
    * @return the books 
    */ 
    @JsonBackReference 
    @ManyToMany(mappedBy ="authors" ,fetch = FetchType.LAZY) 
    public Set<Book> getBooks() { 
     return books; 
    } 

    /** 
    * Sets the books. 
    * 
    * @param books 
    *   the new books 
    */ 
    public void setBooks(Set<Book> books) { 
     this.books = books; 
    } 

} 

起初我是越来越NonUniqueObjectException我通过删除级联删除。现在我被困在这一个。请解释这个错误的原因。谢谢。

Answer 1

这是因为它是试图挽救与同IDS新条目。为什么不在保存前先删除以前的条目，并添加具有相同ID的新条目。