Spring 安全创建了一个名为 table 的 USERS

Question

启动我的应用程序时 Spring 安全性正在我的 h2 数据库中创建两个表 "users" 和 "authorities"。我的问题是，当我第二次启动应用程序时，数据库中已经填充了这两个表，但是 Spring Security till 想要创建它们。我如何告诉 Spring Secutiry 仅在表不存在时才创建表？或者我应该改变其他东西来解决这个问题？

Spring Secutiry 正在创建我从博客中获得的两个表，这些表描述了我看过的一些代码。它说："Some notes on the data model. No real username nor password is stored in the USERS-table. The table is defined by Spring Security for general purpose usage and not specific for social login use-cases."

Link to the blog

我得到的错误消息，一些 java 堆栈跟踪，是：

Caused by: org.springframework.jdbc.datasource.init.ScriptStatementFailedException: Failed to execute SQL script statement at line 1 of resource class path resource [org/springframework/security/core/userdetails/jdbc/users.ddl]: 
create table users(username varchar_ignorecase(50) not null primary key,password varchar_ignorecase(500) not null,enabled boolean not null); nested exception is org.h2.jdbc.JdbcSQLException: Table "USERS" already exists; 
SQL statement: create table users(username varchar_ignorecase(50) not null primary key,password varchar_ignorecase(500) not null,enabled boolean not null) [42101-175]

和

Caused by: org.springframework.jdbc.datasource.init.ScriptStatementFailedException: Failed to execute SQL script statement at line 1 of resource class path resource [org/springframework/security/core/userdetails/jdbc/users.ddl]:    
create table users(username varchar_ignorecase(50) not null primary key,password varchar_ignorecase(500) not null,enabled boolean not null); nested exception is org.h2.jdbc.JdbcSQLException: Table "USERS" already exists;
SQL statement: create table users(username varchar_ignorecase(50) not null primary key,password varchar_ignorecase(500) not null,enabled boolean not null) [42101-175]

我不确定代码中发生这种情况的位置。我有一个看起来像这样的 entityManageFactory

@Autowired DataSource dataSource;
@Bean
public EntityManagerFactory entityManagerFactory() {
    HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
    vendorAdapter.setGenerateDdl(true);
    Properties props = new Properties();
    props.put("hibernate.dialect", H2Dialect.class.getName());
    props.put("hibernate.format_sql", "true");
    props.put("spring.jpa.properties.hibernate.hbm2ddl.auto", "update");
    props.put("spring.datasource.dbCreate", "update");
    LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
    factory.setJpaVendorAdapter(vendorAdapter);
    factory.setPackagesToScan("mypackage.demo");
    factory.setDataSource(dataSource);
    factory.setJpaProperties(props);
    factory.afterPropertiesSet();

    return factory.getObject();
}

Answer 1

USERS 表（和其他一些表）是在配置 Spring 安全性时创建的。这是该代码的一部分：

public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

@Autowired
private DataSource dataSource;

@Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
    auth.
        jdbcAuthentication()
        .dataSource(dataSource)
        .withDefaultSchema(); 
}

如果我从一个已经存在的数据库开始，该数据库已配置并在其中部署了数据，我会删除该行：

      .withDefaultSchema();

和Spring安全将使用数据库中的现有表。

Answer 2

我是这样处理的：

    JdbcUserDetailsManagerConfigurer<AuthenticationManagerBuilder> configurer =
            auth.jdbcAuthentication().dataSource(dataSource);

    // Check if the auth schema has been populated (from a persistent source); if not, set it to populate
    if (!dataSource.getConnection().getMetaData().getTables(null, "", "USERS", null).first()) {
        configurer = configurer.withDefaultSchema();
    }

Spring 安全创建了一个名为 table 的 USERS

Spring Security creates a table named USERS

spring

spring-security

h2