如何解决Hibernate的LazyInitializationException：懒惰地初始化角色集合失败，无法初始化代理 - 没有会话

在我的spring项目的自定义AuthenticationProvider中，我试图读取登录用户的权限列表，但我面临以下错误。

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.horariolivre.entity.Usuario.autorizacoes, could not initialize proxy - no Session
    at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:566)
    at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:186)
    at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:545)
    at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:124)
    at org.hibernate.collection.internal.PersistentBag.iterator(PersistentBag.java:266)
    at com.horariolivre.security.CustomAuthenticationProvider.authenticate(CustomAuthenticationProvider.java:45)
    at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:156)
    at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:177)
    at org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter.attemptAuthentication(UsernamePasswordAuthenticationFilter.java:94)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:211)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)

通过阅读StackOverflow的其他主题，我了解到这种情况的发生是由于框架处理这种类型的属性的方式，但我无法找出适合我情况的任何解决方案。谁能指出我做错了什么，我可以做什么来解决这个问题？

我的Custom AuthenticationProvider的代码是。

@Component
public class CustomAuthenticationProvider implements AuthenticationProvider {

    @Autowired
    private UsuarioHome usuario;

    public CustomAuthenticationProvider() {
        super();
    }

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        System.out.println("CustomAuthenticationProvider.authenticate");

        String username = authentication.getName();
        String password = authentication.getCredentials().toString();

        Usuario user = usuario.findByUsername(username);

        if (user != null) {
            if(user.getSenha().equals(password)) {
                List<AutorizacoesUsuario> list = user.getAutorizacoes();

                List <String> rolesAsList = new ArrayList<String>();
                for(AutorizacoesUsuario role : list){
                    rolesAsList.add(role.getAutorizacoes().getNome());
                }

                List<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>();
                for (String role_name : rolesAsList) {
                    authorities.add(new SimpleGrantedAuthority(role_name));
                }

                Authentication auth = new UsernamePasswordAuthenticationToken(username, password, authorities);
                return auth;
            }
            else {
                return null;
            }
        } else {
            return null;
        }
    }

    @Override
    public boolean supports(Class<?> authentication) {
        return authentication.equals(UsernamePasswordAuthenticationToken.class);
    }

}

我的实体类是。

UsuarioHome.java

@Entity
@Table(name = "usuario")
public class Usuario implements java.io.Serializable {

    private int id;
    private String login;
    private String senha;
    private String primeiroNome;
    private String ultimoNome;
    private List<TipoUsuario> tipoUsuarios = new ArrayList<TipoUsuario>();
    private List<AutorizacoesUsuario> autorizacoes = new ArrayList<AutorizacoesUsuario>();
    private List<DadosUsuario> dadosUsuarios = new ArrayList<DadosUsuario>();
    private ConfigHorarioLivre config;

    public Usuario() {
    }

    public Usuario(String login, String senha) {
        this.login = login;
        this.senha = senha;
    }

    public Usuario(String login, String senha, String primeiroNome, String ultimoNome, List<TipoUsuario> tipoUsuarios, List<AutorizacoesUsuario> autorizacoesUsuarios, List<DadosUsuario> dadosUsuarios, ConfigHorarioLivre config) {
        this.login = login;
        this.senha = senha;
        this.primeiroNome = primeiroNome;
        this.ultimoNome = ultimoNome;
        this.tipoUsuarios = tipoUsuarios;
        this.autorizacoes = autorizacoesUsuarios;
        this.dadosUsuarios = dadosUsuarios;
        this.config = config;
    }

    public Usuario(String login, String senha, String primeiroNome, String ultimoNome, String tipoUsuario, String[] campos) {
        this.login = login;
        this.senha = senha;
        this.primeiroNome = primeiroNome;
        this.ultimoNome = ultimoNome;
        this.tipoUsuarios.add(new TipoUsuario(this, new Tipo(tipoUsuario)));
        for(int i=0; i<campos.length; i++)
            this.dadosUsuarios.add(new DadosUsuario(this, null, campos[i]));
    }

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

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

    @Column(name = "login", nullable = false, length = 16)
    public String getLogin() {
        return this.login;
    }

    public void setLogin(String login) {
        this.login = login;
    }

    @Column(name = "senha", nullable = false)
    public String getSenha() {
        return this.senha;
    }

    public void setSenha(String senha) {
        this.senha = senha;
    }

    @Column(name = "primeiro_nome", length = 32)
    public String getPrimeiroNome() {
        return this.primeiroNome;
    }

    public void setPrimeiroNome(String primeiroNome) {
        this.primeiroNome = primeiroNome;
    }

    @Column(name = "ultimo_nome", length = 32)
    public String getUltimoNome() {
        return this.ultimoNome;
    }

    public void setUltimoNome(String ultimoNome) {
        this.ultimoNome = ultimoNome;
    }

    @ManyToMany(cascade=CascadeType.ALL)
    @JoinTable(name = "tipo_usuario", joinColumns = { @JoinColumn(name = "fk_usuario") }, inverseJoinColumns = { @JoinColumn(name = "fk_tipo") })
    @LazyCollection(LazyCollectionOption.TRUE)
    public List<TipoUsuario> getTipoUsuarios() {
        return this.tipoUsuarios;
    }

    public void setTipoUsuarios(List<TipoUsuario> tipoUsuarios) {
        this.tipoUsuarios = tipoUsuarios;
    }

    @ManyToMany(cascade=CascadeType.ALL)
    @JoinTable(name = "autorizacoes_usuario", joinColumns = { @JoinColumn(name = "fk_usuario") }, inverseJoinColumns = { @JoinColumn(name = "fk_autorizacoes") })
    @LazyCollection(LazyCollectionOption.TRUE)
    public List<AutorizacoesUsuario> getAutorizacoes() {
        return this.autorizacoes;
    }

    public void setAutorizacoes(List<AutorizacoesUsuario> autorizacoes) {
        this.autorizacoes = autorizacoes;
    }

    @ManyToMany(cascade=CascadeType.ALL)
    @JoinTable(name = "dados_usuario", joinColumns = { @JoinColumn(name = "fk_usuario") }, inverseJoinColumns = { @JoinColumn(name = "fk_dados") })
    @LazyCollection(LazyCollectionOption.TRUE)
    public List<DadosUsuario> getDadosUsuarios() {
        return this.dadosUsuarios;
    }

    public void setDadosUsuarios(List<DadosUsuario> dadosUsuarios) {
        this.dadosUsuarios = dadosUsuarios;
    }

    @OneToOne
    @JoinColumn(name="fk_config")
    public ConfigHorarioLivre getConfig() {
        return config;
    }

    public void setConfig(ConfigHorarioLivre config) {
        this.config = config;
    }
}

AutorizacoesUsuario.java。

Autorizacoes.java。

完整的项目可在github上找到。

--> https://github.com/klebermo/webapp_horario_livre

geisterfurz007
已编辑的问题 8日 十月 2019 в 7:56
编程
hibernate java spring spring-mvc spring-security
2日 四月 2014 в 7:56
5 种观点
解决办法

你需要在ManyToMany注解中添加fetch=FetchType.EAGER来自动拉回子实体。

@ManyToMany(fetch = FetchType.EAGER)

一个更好的选择是通过在你的spring配置文件中添加以下内容来实现spring transactionManager。

然后你可以在你的认证方法中加入@Transactional注解，就像这样。

@Transactional
public Authentication authenticate(Authentication authentication)

这将在验证方法的持续时间内启动一个数据库事务，允许任何懒惰的集合在你试图使用它们的时候从数据库中检索出来。

Neil
编辑本段答案4日 六月 2019 в 4:04
评论(2)

原因是，当你使用懒惰加载时，会话被关闭。

有两个解决方案。

1.不要使用懒惰加载。

在XML中设置lazy=false或者在注释中设置@OneToMany(fetch = FetchType.EAGER)。

2.使用懒惰加载。

在XML中设置lazy=true或在注释中设置@OneToMany(fetch = FetchType.LAZY)。

并在你的web.xml中添加OpenSessionInViewFilter过滤器。

详细情况见我的帖子。

https://stackoverflow.com/a/27286187/1808417

Community
编辑本段答案23日 五月 2017 в 12:26
评论(1)

添加注释

@JsonManagedReference

比如说。

@ManyToMany(cascade=CascadeType.ALL)
@JoinTable(name = "autorizacoes_usuario", joinColumns = { @JoinColumn(name = "fk_usuario") }, inverseJoinColumns = { @JoinColumn(name = "fk_autorizacoes") })
@JsonManagedReference
public List getAutorizacoes() {
    return this.autorizacoes;
}
Pang
编辑本段答案11日 三月 2015 в 2:20
评论(0)