Spring Boot mvc java应用程序设置为UPDATE时无法运行

【问题标题】：Springboot mvc java application cannot run when it's set to UPDATESpring Boot mvc java应用程序设置为UPDATE时无法运行
【发布时间】：2018-05-10 18:53:33
【问题描述】：

在我决定加入 cmets 之前，我的 Web 应用程序一直在工作。我把它搞砸了，所以我把 spring.jpa.hibernate.ddl-auto 从 upate 改为 create-drop 但是现在，当我 spring.jpa.hibernate.ddl-auto = create-drop 应用程序启动时，当我将其更改为 spring.jpa.hibernate.ddl-auto = update 时，我收到此错误：

2017-11-27 15:27:02.481 ERROR 3552 --- [  restartedMain] o.s.boot.SpringApplication               : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1078) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:857) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at blog.BlogApplication.main(BlogApplication.java:14) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_111]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_111]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_111]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_111]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.8.RELEASE.jar:1.5.8.RELEASE]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:954) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:882) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
    at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60) ~[spring-orm-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:353) ~[spring-orm-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:370) ~[spring-orm-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:359) ~[spring-orm-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    ... 21 common frames omitted
Caused by: org.hibernate.tool.schema.spi.SchemaManagementException: Unable to execute schema management to JDBC target [alter table comments add constraint FK99rehd3fcds7jsy5dpa39fitm foreign key (comments) references users (id)]
    at org.hibernate.tool.schema.internal.TargetDatabaseImpl.accept(TargetDatabaseImpl.java:59) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlString(SchemaMigratorImpl.java:431) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applySqlStrings(SchemaMigratorImpl.java:420) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applyForeignKeys(SchemaMigratorImpl.java:386) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigrationToTargets(SchemaMigratorImpl.java:214) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:60) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:134) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:101) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:472) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:879) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
    ... 27 common frames omitted
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: BLOB/TEXT column 'comments' used in key specification without a key length
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_111]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_111]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_111]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_111]
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.Util.getInstance(Util.java:408) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:943) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2483) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.StatementImpl.executeUpdateInternal(StatementImpl.java:1552) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.StatementImpl.executeLargeUpdate(StatementImpl.java:2607) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1480) ~[mysql-connector-java-5.1.44.jar:5.1.44]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_111]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_111]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_111]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_111]
    at org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:114) ~[tomcat-jdbc-8.5.23.jar:na]
    at com.sun.proxy.$Proxy88.executeUpdate(Unknown Source) ~[na:na]
    at org.hibernate.tool.schema.internal.TargetDatabaseImpl.accept(TargetDatabaseImpl.java:56) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
    ... 37 common frames omitted

可能我的一些关系搞砸了，但我有一个 ArticleBindingModel

public class ArticleBindingModel
{    
    private String comments;

    @NotNull
    private String title;
    @NotNull
    private String content;

    //--------------------------GETTERS/SETTERS---------------------------
    public String getTitle()
    {
        return title;
    }

    public void setTitle(String title)
    {
        this.title = title;
    }

    public String getContent()
    {
        return content;
    }

    public void setContent(String content)
    {
        this.content = content;
    }

    public String getComments()
    {
        return comments;
    }

    public void setComments(String comments)
    {
        this.comments = comments;
    }
}

文章实体

@Entity
@Table(name = "articles")
public class Article
{
    private Integer id;
    private String title;
    private String content;

    private User author;
    private User commenter;

    private Set<Comment> comments;


    //-----------------------------CONSTRUCTORS--------------------------
    public Article(String title, String content, User author)
    {
        this.title = title;
        this.content = content;
        this.author = author;

        this.comments = new HashSet<>();
    }
    public Article(){}

    //-------------------------GETTERS/SETTERS----------------------------
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public Integer getId()
    {
        return id;
    }

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

    @Column(nullable = false)
    public String getTitle()
    {
        return title;
    }

    public void setTitle(String title)
    {
        this.title = title;
    }

    @Column(columnDefinition = "text", nullable = false)
    public String getContent()
    {
        return content;
    }

    public void setContent(String content)
    {
        this.content = content;
    }

    @ManyToOne()
    @JoinColumn(nullable = false, name = "authorId")
    public User getAuthor()
    {
        return author;
    }

    public void setAuthor(User author)
    {
        this.author = author;
    }   

    @OneToMany(mappedBy = "article")
    public Set<Comment> getComments()
    {
        return comments;
    }

    public void setComments(Set<Comment> comments)
    {
        this.comments = comments;
    }     
}

评论实体

@Entity
@Table(name = "comments")
public class Comment
{

    private Integer id;
    private User commenter;
    private String comments;
    private Article article;

    //-----------------------------CONSTRUCTORS----------------------

    public Comment(User commenter, String comments, Article article)
    {
        this.commenter = commenter;
        this.comments = comments;
        this.article = article;
    }

    public Comment(){}

    //----------------------METHODS-----------------------------------


    //--------------------GETTERS/SETTERS-----------------------------

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public Integer getId()
    {
        return id;
    }

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

    @Column(nullable = false, columnDefinition = "LONGBLOB")
    public String getComments()
    {
        return comments;
    }

    public void setComments(String comments)
    {
        this.comments = comments;
    }

    @ManyToOne()
    @JoinColumn(nullable = false, name = "commenterId")
    public User getCommenter()
    {
        return commenter;
    }

    public void setCommenter(User commenter)
    {
        this.commenter = commenter;
    }

    @ManyToOne()
    @JoinColumn(nullable = false, name = "articleId")
    public Article getArticle()
    {
        return article;
    }

    public void setArticle(Article article)
    {
        this.article = article;
    }

}

用户实体

@Entity
@Table(name = "users")
public class User
{
private Integer id;
private String username;

private Set<Article> articles;
private Set<Comment> comments;

//-----------------------------------CONSTRUCTORS-----------------------------------
public User (String username)
{
    this.username = username;  

    this.articles = new HashSet<>();
    this.comments = new HashSet<>();
}
public User() {

}
//------------------------------------METHODS------------------------------------------
//----------------------------------GETTERS/SETTERS--------------------------------------
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Integer getId()
{
    return id;
}

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


@Column(name = "username", length = 80, nullable = false, unique = true)
public String getUsername()
{
    return username;
}

public void setUsername(String username)
{
    this.username = username;
}

@OneToMany(mappedBy = "author")
public Set<Article> getArticles()
{
    return articles;
}

public void setArticles(Set<Article> articles)
{
    this.articles = articles;
}


@OneToMany(mappedBy = "comments")
public Set<Comment> getComments()
{
    return comments;
}

public void setComments(Set<Comment> comments)
{
    this.comments = comments;
}
}

然后我有一个适当实体的存储库。我已经对代码进行了大量编辑，因此我不会成为“heresallmycode”的人。但是，我很确定我的注释关系是问题所在。我希望有与文章具有 多对一 关系的 cmets，当他们发布时会出现在 cmets 上方的用户和反向 一对多 关系与 cmets 的文章。当使用create 参数创建表时，我的文章表没有被清空（我之前在update 上拥有它），我不得不手动删除它。现在，当创建表时它是空的。我认为这值得一提。如果有必要，我可以发布create 日志。

编辑

我忘记了我的 ArticleController

@Controller
public class ArticleController
{
    @Autowired
    private ArticleRepository articleRepository;
    @Autowired
    private UserRepository userRepository;
    @Autowired  
    private CommentRepository commentRepository;



    //---------------------------------METHODS-----------------------

    //ARTICLE DETAILS--------------------------------------------------
    @GetMapping("/article/{id}")
    public String details(Model model, @PathVariable Integer id)
    {
        if (!this.articleRepository.exists(id))
        {
            return "redirect:/";
        }
        UserDetails principal = (UserDetails) SecurityContextHolder.getContext().getAuthentication().getPrincipal();//This was inside the IF
        if (!(SecurityContextHolder.getContext().getAuthentication() instanceof AnonymousAuthenticationToken))
        {
            User entityUser = this.userRepository.findByEmail(principal.getUsername());

            model.addAttribute("user", entityUser);
        }
        //Getting the article
        Article article = this.articleRepository.findOne(id);

        //Comments
        Set<Comment> comments = this.commentRepository.findCommentsByArticleId(id);//findAllByArticlesId
        //Set<User> commenters = this.userRepository.findAllByComments(comments);



        //Models
        model.addAttribute("article", article);
        //model.addAttribute("commenters", commenters);
        model.addAttribute("comments", comments);

        model.addAttribute("view", "article/details");

        return "base-layout";
    }

    @PostMapping("/article/{id}")
    @PreAuthorize("isAuthenticated()")
    public String detailsProcess(@PathVariable Integer id, ArticleBindingModel articleBindingModel)
    {
        if (!this.articleRepository.exists(id))
        {
            return "redirect:/";
        }
        //Getting the article
        Article article = this.articleRepository.findOne(id);

        //Getting the commenter
        UserDetails principal = (UserDetails) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        User commenter = this.userRepository.findByEmail(principal.getUsername());

        //Setting the values for the comment section


        return "redirect:/article/{id}";
    }
}

【问题讨论】：

  • 这可能会帮助你stackoverflow.com/questions/1827063/…
  • 这是一本很好的读物，并且需要时刻牢记，但是，我使用限制为 11 的 ID 作为我的主键。我不限制我的文本/blob，也不将任何内容转换为文本/blob。

标签： java spring hibernate spring-mvc jpa


【解决方案1】：

您已将评论中与用户的关系定义为：

@ManyToOne()
@JoinColumn(nullable = false, name = "commenterId")
public User getCommenter()
{
    return commenter;
}

但您指的是关系的Comment 一侧的comments 字符串列。您应该将mappedBy 更改为：

@OneToMany(mappedBy = "commenter")
public Set<Comment> getComments()
{
    return comments;
}

【讨论】：

  • 这可能会在我能够启动我的应用程序之后解决一个问题。问题是，它不会让我启动我的应用程序，因为出现“错误：创建名称为 'entityManagerFactory' 的 bean”。不过，我真的很感谢你的回答。
  • 错误是关于 cmets 列..这是由于关键引用..无效..上面的代码修复了..我会试一试
  • 哦，对不起，忘了告诉你我立即尝试并更改了'mappedBy'变量，但仍然出现错误
  • 另外，当我检查 mySQL 数据库时，在“cmets”表中有 2 列：“comment”和“cmets”，它们都设置为 LONGBLOB 编辑：没关系，我放弃了旧的表和其他所有表并创建了一个新表，现在只有一列
猜你喜欢
  • 2020-10-03
  • 2023-03-16
  • 2018-05-08
  • 2018-11-07
  • 2018-07-21
  • 2019-05-02
  • 1970-01-01
  • 2020-11-06
  • 2018-05-13
相关资源
最近更新 更多
热门标签
Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode