写了一个配置类，启动项目的时候报错：Property 'dataSource' is required
原代码如下：
@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private PersistentTokenRepository persistentTokenRepository;
@Autowired
private DataSource dataSource;
@Bean
PersistentTokenRepository getPersistentTokenRepository(){
JdbcTokenRepositoryImpl jdbcTokenRepository = new JdbcTokenRepositoryImpl();
DataSource dataSource = this.dataSource;
jdbcTokenRepository.setDataSource(dataSource);
return jdbcTokenRepository;
}
}
解决办法：把DataSource 放到最上面即可，如下所示。spring在加载bean的时候，从上而下加载，按照上面的代码，先加载PersistentTokenRepository，此时还没加载DataSource，因此DataSource=null，jdbcTokenRepository.setDataSource(dataSource)这个方法执行的时候就会报错。调整了一下位置，问题解决
@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private DataSource dataSource;
@Autowired
private PersistentTokenRepository persistentTokenRepository;
@Bean
PersistentTokenRepository getPersistentTokenRepository(){
JdbcTokenRepositoryImpl jdbcTokenRepository = new JdbcTokenRepositoryImpl();
DataSource dataSource = this.dataSource;
jdbcTokenRepository.setDataSource(dataSource);
return jdbcTokenRepository;
}
}