Question

我有一个配置类，其中设置了JavaMailSenderImpl属性，但是我不想设置@Bean中的值，而只是将其设置为通过方法（例如：{ {1}}）。下面是代码，我尝试通过getter传递值，但得到npe。

mailSender.setPort(ClassImpl.getPort());

//properties.file
mail.host=the_host
mail.port=123
mail.username=the_username
mail.password=the_password

// ClassInterface has only one sendMail method
@Component
public class ClassImpl implements ClassInterface{
    @Value("${mail.host}")
    public String host;

    @Value("${mail.port}")
    private int port;

    @Value("${mail.username}")
    private String username;

    @Value("${mail.password}")
    private String password;

    public String getHost() {
        return host;
    }

    public int getPort() {
        return port;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }

    @Autowired
    JavaMailSenderImpl mailSender;

    @Override
    public void sendMail(String sender, String receiver, String subject, String content) {

        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(sender);
        message.setTo(receiver);
        message.setSubject(subject);
        message.setText(content);

        mailSender.send(message);
    }
}

编辑

试图使此getHost @Configuration @ComponentScan public class SpringConfiguration { @Bean public JavaMailSenderImpl mailSenderService() { JavaMailSenderImpl mailSender = new JavaMailSenderImpl(); mailSender.setHost(host_here); mailSender.setPort(port_here); mailSender.setUsername(user_here); mailSender.setPassword(pwd_here); return mailSender; } }并通过如下方法：

static

Answer 1

正如zapl所说，我在@Bean参数中添加了ClassImpl，它工作正常。

create table Table1 (
  TestOne int identity(1,1) primary key not null,
  FirstName nvarchar(50) not null,
);

create table Table2 (
  TestTwo int identity(1,1) primary key foreign key references Table1(TestOne) not null,
  FirstName nvarchar(50) not null,
);

将@Value值传递给Config类

1 个答案: