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Java 休眠多对多关系

java sql hibernate jpa spring-boot

Java 休眠多对多关系,java,sql,hibernate,jpa,spring-boot,Java,Sql,Hibernate,Jpa,Spring Boot,我试图映射我的数据库表，这样我就可以在图书和作者表之间建立多对多关系 首先，这是一对多关系设计，由于@xenteros和@Amer Qarabsa，我开始将其重新设计为多对多关系 这就是我的数据库模式的样子： 作者（模型）类别： 实体 @表（name=“author”） 公共类作者{ @身份证 @GeneratedValue（策略=GenerationType.AUTO） @列（name=“author\u id”） 私有int-id； @列（name=“name”） 私有字符串名称； @列（

我试图映射我的数据库表，这样我就可以在图书和作者表之间建立多对多关系

首先，这是一对多关系设计，由于@xenteros和@Amer Qarabsa，我开始将其重新设计为多对多关系

这就是我的数据库模式的样子：

作者（模型）类别：

实体
@表（name=“author”）
公共类作者{
@身份证
@GeneratedValue（策略=GenerationType.AUTO）
@列（name=“author\u id”）
私有int-id；
@列（name=“name”）
私有字符串名称；
@列（name=“姓氏”）
私家姓；
@列（name=“出生日期”）
私人出生日期；
@多个（级联=级联类型.ALL）
@JoinTable（name=“book\u author”，
joinColumns=@JoinColumn（name=“book\u id”），
inverseJoinColumns=@JoinColumn（name=“author\u id”））
private Set authorsBooks=new HashSet（）；
公共int getId（）{
返回id；
}
公共无效集合id（内部id）{
this.id=id；
}
公共字符串getName（）{
返回名称；
}
公共void集合名（字符串名）{
this.name=名称；
}
公共字符串getNames（）{
返回姓氏；
}
public void setSurname（字符串姓氏）{
this.姓氏=姓氏；
}
公共日期getDateOfBirth（）{
出生返回日期；
}
公共无效设置出生日期（出生日期）{
this.dateOfBirth=出生日期；
}
公共集getAuthorsBooks（）{
归还作者书籍；
}
public void setAuthorsBooks（集authorsBooks）{
this.authorsBooks=authorsBooks；
}
}
图书（模型）类：

@实体
@表（name=“book”）
公共课堂用书{
@身份证
@GeneratedValue（策略=GenerationType.AUTO）
@列（name=“book\u id”）
私人书号；
@列（name=“title”）
私有字符串标题；
@列（name=“title\u原件”）
私有字符串标题原件；
@列（name=“首映日”）
私人约会首映；
@多个（级联=级联类型.ALL）
@JoinTable（name=“book\u author”，joinColumns={@JoinColumn（name=“book\u id”）}，inverseJoinColumns={@JoinColumn（name=“author\u id”）}）
私有集=新哈希集（0）；
public int getBookId（）{
返回bookId；
}
公共作废退书簿（int bookId）{
this.bookId=bookId；
}
公共字符串getTitle（）{
返回标题；
}
公共无效集合标题（字符串标题）{
this.title=标题；
}
公共字符串getTitleOriginal（）{
返回标题原件；
}
public void setTitleOriginal（字符串titleOriginal）{
this.titleOriginal=titleOriginal；
}
公开日期getPremiereDate（）{
返回首字母；
}
公共无效设置初始日期（初始日期）{
this.premiereDate=premiereDate；
}
公共集getBookAuthors（）{
将此文件返回给作者；
}
公共书籍作者（集书籍作者）{
this.booksAuthors=booksAuthors；
}
}
AuthorController类：

@Controller
public class AuthorController {

    @Autowired
    private AuthorRepository authorRepository;

    @RequestMapping(method = RequestMethod.GET)
    public ResponseEntity<Collection<Author>> getAuthors() {
        return new ResponseEntity<>(authorRepository.findAll(), HttpStatus.OK);
    }

    @RequestMapping(value = "/authors/{id}", method = RequestMethod.GET)
    public ResponseEntity<Author> getAuthor(@PathVariable int id) {
        Author author = authorRepository.findOne(id);

        if (author != null) {
            return new ResponseEntity<>(authorRepository.findOne(id), HttpStatus.OK);
        } else {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }
    }

    @RequestMapping(method = RequestMethod.POST)
    public ResponseEntity<?> addAuthor(@RequestBody Author author) {
        return new ResponseEntity<>(authorRepository.save(author), HttpStatus.CREATED);
    }

    @RequestMapping(value = "/authors/{id}", method = RequestMethod.DELETE)
    public ResponseEntity<Void> deleteAuthor(@PathVariable int id) {
        authorRepository.delete(id);

        return new ResponseEntity<Void>(HttpStatus.OK);
    }

    /*
    @RequestMapping(value = {"/authors"}, method = RequestMethod.GET)
    public ModelAndView allAuthors() {
        ModelAndView modelAndView = new ModelAndView("authors/home"); //viewname przekazujemy z folderu templates
        List<Author> author = authorService.getAllAuthors();
        modelAndView.addObject("authors",author);  //ta nazwa tutaj "authors" sluzy potem do wykorzystania jej w templacie
        return modelAndView;
    }
    */

}

@Controller
public class BookController {

    @Autowired
    private BookRepository bookRepository;

    @RequestMapping(method = RequestMethod.GET)
    public ResponseEntity<Collection<Book>> getBooks() {
        return new ResponseEntity<>(bookRepository.findAll(), HttpStatus.OK);
    }

    @RequestMapping(value = "/books/{id}", method = RequestMethod.GET)
    public ResponseEntity<Book> getBook(@PathVariable int id) {
        Book book = bookRepository.findOne(id);

        if (book != null) {
            return new ResponseEntity<>(bookRepository.findOne(id), HttpStatus.OK);
        } else {
            return new ResponseEntity<>( HttpStatus.NOT_FOUND);
        }
    }

    @RequestMapping(method = RequestMethod.POST)
    public ResponseEntity<?> addBook(@RequestBody Book book) {
        return new ResponseEntity<>(bookRepository.save(book), HttpStatus.CREATED);
    }

    @RequestMapping(value = "/books/{id}", method = RequestMethod.DELETE)
    public ResponseEntity<Void> deleteBook(@PathVariable int id) {
        bookRepository.delete(id);

        return new ResponseEntity<Void>(HttpStatus.OK);
    }

    /*
    @RequestMapping(value = {"/books"}, method = RequestMethod.GET)
    public ModelAndView allBooks() {
        ModelAndView modelAndView = new ModelAndView("books/home"); //viewname przekazujemy z folderu templates
        List<Book> book = bookService.getAllBooks();
        modelAndView.addObject("books",book);  //ta nazwa tutaj "books" sluzy potem do wykorzystania jej w templacie
        return modelAndView;
    }
    */


}

@控制器
公共类AuthorController{
@自动连线
私人作者或报告作者或报告作者；
@RequestMapping（method=RequestMethod.GET）
公众反应{
返回新的响应属性（authorRepository.findAll（），HttpStatus.OK）；
}
@RequestMapping（value=“/authors/{id}”，method=RequestMethod.GET）
公共响应属性getAuthor（@PathVariable int-id）{
Author=authorRepository.findOne（id）；
if（author！=null）{
返回新的响应属性（authorRepository.findOne（id），HttpStatus.OK）；
}否则{
返回新的ResponseEntity（未找到HttpStatus.NOT_）；
}
}
@RequestMapping（method=RequestMethod.POST）
公共响应地址作者（@RequestBody Author）{
返回新的响应属性（authorRepository.save（author），HttpStatus.CREATED）；
}
@RequestMapping（value=“/authors/{id}”，method=RequestMethod.DELETE）
公共响应属性deleteAuthor（@PathVariable int-id）{
authorRepository.delete（id）；
返回新的响应状态（HttpStatus.OK）；
}
/*
@RequestMapping（值={“/authors”}，方法=RequestMethod.GET）
公共模型和视图所有作者（）{
ModelAndView ModelAndView=new ModelAndView（“作者/主页”）；//viewname przekazujemy z folderu模板
List author=authorService.getAllAuthors（）；
modelAndView.addObject（“作者”，作者）；//ta nazwa tutaj“作者”sluzy potem do wykorzystania jej w templacie
返回模型和视图；
}
*/
}
BookController类别：

@Controller
public class AuthorController {

    @Autowired
    private AuthorRepository authorRepository;

    @RequestMapping(method = RequestMethod.GET)
    public ResponseEntity<Collection<Author>> getAuthors() {
        return new ResponseEntity<>(authorRepository.findAll(), HttpStatus.OK);
    }

    @RequestMapping(value = "/authors/{id}", method = RequestMethod.GET)
    public ResponseEntity<Author> getAuthor(@PathVariable int id) {
        Author author = authorRepository.findOne(id);

        if (author != null) {
            return new ResponseEntity<>(authorRepository.findOne(id), HttpStatus.OK);
        } else {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }
    }

    @RequestMapping(method = RequestMethod.POST)
    public ResponseEntity<?> addAuthor(@RequestBody Author author) {
        return new ResponseEntity<>(authorRepository.save(author), HttpStatus.CREATED);
    }

    @RequestMapping(value = "/authors/{id}", method = RequestMethod.DELETE)
    public ResponseEntity<Void> deleteAuthor(@PathVariable int id) {
        authorRepository.delete(id);

        return new ResponseEntity<Void>(HttpStatus.OK);
    }

    /*
    @RequestMapping(value = {"/authors"}, method = RequestMethod.GET)
    public ModelAndView allAuthors() {
        ModelAndView modelAndView = new ModelAndView("authors/home"); //viewname przekazujemy z folderu templates
        List<Author> author = authorService.getAllAuthors();
        modelAndView.addObject("authors",author);  //ta nazwa tutaj "authors" sluzy potem do wykorzystania jej w templacie
        return modelAndView;
    }
    */

}

@Controller
public class BookController {

    @Autowired
    private BookRepository bookRepository;

    @RequestMapping(method = RequestMethod.GET)
    public ResponseEntity<Collection<Book>> getBooks() {
        return new ResponseEntity<>(bookRepository.findAll(), HttpStatus.OK);
    }

    @RequestMapping(value = "/books/{id}", method = RequestMethod.GET)
    public ResponseEntity<Book> getBook(@PathVariable int id) {
        Book book = bookRepository.findOne(id);

        if (book != null) {
            return new ResponseEntity<>(bookRepository.findOne(id), HttpStatus.OK);
        } else {
            return new ResponseEntity<>( HttpStatus.NOT_FOUND);
        }
    }

    @RequestMapping(method = RequestMethod.POST)
    public ResponseEntity<?> addBook(@RequestBody Book book) {
        return new ResponseEntity<>(bookRepository.save(book), HttpStatus.CREATED);
    }

    @RequestMapping(value = "/books/{id}", method = RequestMethod.DELETE)
    public ResponseEntity<Void> deleteBook(@PathVariable int id) {
        bookRepository.delete(id);

        return new ResponseEntity<Void>(HttpStatus.OK);
    }

    /*
    @RequestMapping(value = {"/books"}, method = RequestMethod.GET)
    public ModelAndView allBooks() {
        ModelAndView modelAndView = new ModelAndView("books/home"); //viewname przekazujemy z folderu templates
        List<Book> book = bookService.getAllBooks();
        modelAndView.addObject("books",book);  //ta nazwa tutaj "books" sluzy potem do wykorzystania jej w templacie
        return modelAndView;
    }
    */


}

@控制器
公共类图书管理员{
@自动连线
私人书库；
@RequestMapping（method=RequestMethod.GET）
公共响应getBooks（）{
返回新的响应属性（bookRepository.findAll（），HttpStatus.OK）；
}
@RequestMapping（value=“/books/{id}”，method=RequestMethod.GET）
公共响应属性getBook（@PathVariable int-id）{
Book Book=bookRepository.findOne（id）；
if（book！=null）{
返回新的响应属性（bookRepository.findOne（id），HttpStatus.OK）；
}否则{
返回新的ResponseEntity（未找到HttpStatus.NOT_）；
}
}
@RequestMapping（method=RequestMethod.POST）
公共响应地址簿（@RequestBody Book）{
返回新的响应属性（bookRepository.save（book），HttpStatus.CREATED）；
}
@RequestMapping（value=“/books/{id}”，method=RequestMethod.DELETE）
公共响应属性deleteBook（@PathVariable int-id）{
bookRepository.delete（id）；
返回新的响应状态（HttpStatus.OK）；
}
/*
@RequestMapping（值={“/books”}，m

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-08-07 13:02:18.638 ERROR 6812 --- [  restartedMain] o.s.boot.SpringApplication               : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'bookController' method 
public org.springframework.http.ResponseEntity<?> eu.fitk.controller.BookController.addBook(eu.fitk.model.Book)
to {[],methods=[POST]}: There is already 'authorController' bean method
public org.springframework.http.ResponseEntity<?> eu.fitk.controller.AuthorController.addAuthor(eu.fitk.model.Author) mapped.
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.6.RELEASE.jar:1.5.6.RELEASE]
    at eu.fitk.BookwebApplication.main(BookwebApplication.java:9) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.6.RELEASE.jar:1.5.6.RELEASE]
Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'bookController' method 
public org.springframework.http.ResponseEntity<?> eu.fitk.controller.BookController.addBook(eu.fitk.model.Book)
to {[],methods=[POST]}: There is already 'authorController' bean method
public org.springframework.http.ResponseEntity<?> eu.fitk.controller.AuthorController.addAuthor(eu.fitk.model.Author) mapped.
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.assertUniqueMethodMapping(AbstractHandlerMethodMapping.java:576) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.register(AbstractHandlerMethodMapping.java:540) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.registerHandlerMethod(AbstractHandlerMethodMapping.java:264) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:250) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:214) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:184) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:127) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.10.RELEASE.jar:4.3.10.RELEASE]
    ... 21 common frames omitted


Process finished with exit code 0



    @JoinTable(name = "book_author", joinColumns = { @JoinColumn(name = "book_id") }, inverseJoinColumns = { @JoinColumn(name = "author_id") })



@RequestMapping(method = RequestMethod.POST)
    public ResponseEntity<?> addBook(@RequestBody Book book) {
        return new ResponseEntity<>(bookRepository.save(book), HttpStatus.CREATED);
    }

@RequestMapping(value="/addauthor", method = RequestMethod.POST)
    public ResponseEntity<?> addAuthor(@RequestBody Author author) {
        return new ResponseEntity<>(authorRepository.save(author), HttpStatus.CREATED);
    }



@RequestMapping(value="/addauthor", method = RequestMethod.POST)
    public ResponseEntity<?> addAuthor(@RequestBody Author author) {
        return new ResponseEntity<>(authorRepository.save(author), HttpStatus.CREATED);
    }
@RequestMapping(value = "/addbook", method = RequestMethod.POST)
    public ResponseEntity<?> addBook(@RequestBody Book book) {
        return new ResponseEntity<>(bookRepository.save(book), HttpStatus.CREATED);
    }