带破折号的 POST 参数的 Struts2 setter 方法

Question

I have mailgun.com routes to forward email POST to my Struts2 Action. The mailgun POST request content dashes in some parameter names: sender , subject (OK) but how can I map setter method in my Struts2 Action for POST parameter: body-plain (contain dash), body-html , message-headers , Content-Type ?

I have try this but not work bodyPlain=null :

public class MyAction extends ActionSupport {

    private String sender;
    private String subject;
    private String bodyPlain;

    public String execute() {

        LOG.info(sender);
        LOG.info(subject);
        LOG.info(bodyPlain);
        return SUCCESS;
    }
    public void setSender(String sender) {
        this.sender = sender;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public void setBodyPlain(String bodyPlain) {
        this.bodyPlain = bodyPlain;
    }
}

Answer 1

I can`t change mailgun service code. This is my code to deal with Struts2 naming conventions. If its have more clean solution for this problem let me know.

public class MyAction extends ActionSupport implements ParameterAware {

        private String sender;
        private String subject;
        private String bodyPlain;

        public String execute() {
            LOG.info(sender);
            LOG.info(subject);
            LOG.info(bodyPlain);
            return SUCCESS;
        }

        public void setSender(String sender) {
            this.sender = sender;
        }

        public void setSubject(String subject) {
            this.subject = subject;
        }

        @Override
        public void setParameters(Map<String, String[]> parameters) {
            if (parameters != null) {
                for (Map.Entry<String, String[]> entry : parameters.entrySet()) {
                    String key = entry.getKey();
                    String[] value = entry.getValue();
                    if(key.equals("body-plain") && value.length > 0) this.bodyPlain = value[0];
                    LOG.info("key:" + key + " value:" + Arrays.toString(value));
                }
            }
        }
    }

Answer 2

Then you need to rename body-plain to bodyPlain to map parameters to the action fields. Java and naming conventions use camelCased instance variables for classes. And this is an obligatory rule to map request parameters to the action class.

You can translate/rename them on any level, filter, url-rewrite rule, interceptor, etc. Any way parameters are passed to the ActionContext that is a map, then traversing the map and remove dashes from the key names would be easy if you try

Map<String, Object[]> parameters =  ActionContext.getContext().getParameters();