java - 读取属性文件的 RestFul Web 服务

Question

我有几个 Jersey REST Web 服务，例如 SendPassword 和 ResetPassword，其目的是发送电子邮件。

为了发送电子邮件，我在 tomcat 下配置了一个属性文件，所有这些都工作正常

代码SendPassword.java有点像这样

 @Path("/sendpassword")
    public class SendPassword {
        @GET
        @Produces("application/json")
        public String sendPasswordToEmail(@QueryParam("empid") String empid)
                throws JSONException
        {
            try {

            SendEmailUtility.sendmail("weqw","2312");

        }
        catch(Exception e)
        {
        }
}

SendEmailUtility.java

public class SendEmailUtility 
    {
    public static String sendmail(String sendemalto,String generatedpwd) throws IOException {
        String result = "fail";
        File configDir = new File(System.getProperty("catalina.base"), "conf");
        File configFile = new File(configDir, "email.properties");
        InputStream stream = new FileInputStream(configFile);
        Properties props_load = new Properties();
        props_load.load(stream);
        final String username = props_load.getProperty("username");
        final String password = props_load.getProperty("password");
        Properties props_send = new Properties();
        props_send.put("mail.smtp.auth","true");
        props_send.put("mail.smtp.starttls.enable","true");
                        Transport.send(message);
          // Some code to send email
            result = "success";
        } catch (MessagingException e) {
            result = "fail";
            e.printStackTrace();
        }
        return result;
    }

}

如您所见，我正在读取网络服务每次调用的属性文件

(由于读取操作的成本有点高)，有什么办法可以解决这个问题吗？

您能否让我知道处理此问题的最佳方法是什么？

提前致谢。

Answer 1

有几种方法可以做到这一点，其中一种方法是使 props_load 成为类的私有(private)静态成员并像这样调用它

    public class SendEmailUtility 
    {
       private static Properties props;

      private static Properties getProperties() {
       if (props == null) {
        File configDir = new File(System.getProperty("catalina.base"), "conf");
        File configFile = new File(configDir, "email.properties");
        InputStream stream = new FileInputStream(configFile);
        props = new Properties();
        props.load(stream);
    }
    return props; 
    }
    public static String sendmail(String sendemalto,String generatedpwd) throws  IOException {
        String result = "fail";
        Properties props_load = getProperties();
        final String username = props_load.getProperty("username");
        final String password = props_load.getProperty("password");
        Properties props_send = new Properties();
        props_send.put("mail.smtp.auth","true");
        props_send.put("mail.smtp.starttls.enable","true");
                Transport.send(message);
          // Some code to send email
            result = "success";
        } catch (MessagingException e) {
            result = "fail";
            e.printStackTrace();
        }
        return result;
    }

}

我建议的另一种设计是制作一个电子邮件服务类，例如 EmailSender 或 EmailService，然后将其注入(inject) SendPassword 类

@Path("/sendpassword")
    public class SendPassword {
        @Autowired
        EmailService emailService;
        @GET
        @Produces("application/json")
        public String sendPasswordToEmail(@QueryParam("empid") String empid)
                throws JSONException
        {