Exception handling in Spring MVC

SimpleMappingExceptionResolver

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Specific Exception handler

Class SimpleleMappingExceptionResolver implements interface HandlerExceptionResolver. You can implement own specific class or extends class SimpleleMappingExceptionResolver.

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MailErrorHandlerException

If occure some exception it send mail.

public class ErrorHandlerController implements HandlerExceptionResolver{

    public static final String DEFAULT_EXCEPTION_ATTRIBUTE = "exception";
    public static final String DEFAULT_ERROR_WIEW = "error";
   
    private MailManager mailManager;
    private String from;
    private String to;
    private String subject;
    private String defaultErrorView = DEFAULT_ERROR_WIEW;
    private String exceptionAttribute = DEFAULT_EXCEPTION_ATTRIBUTE;

    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {

        if (mailManager != null && from != null && to != null && subject != null){
            sendMailToWebmaster(ex);
        }

        return getModelAndView(defaultErrorView, ex);
    }

    private void sendMailToWebmaster(Exception ex) {
        mailManager.setFrom(  from );
        mailManager.setTo( to );
        mailManager.setSubject( subject );
        mailManager.setText( stack2string( ex ));
        mailManager.sendMail();
    }

    protected ModelAndView getModelAndView(String viewName, Exception ex) {
         ModelAndView mv = new ModelAndView(viewName);       
         mv.addObject(this.exceptionAttribute, ex);      
         return mv;
    }

    public static String stack2string(Exception e) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            e.printStackTrace(pw);
            return "------\r\n" + sw.toString() + "------\r\n";
    }
    
    public void setDefaultErrorView(String defaultErrorView) {
        this.defaultErrorView = defaultErrorView;
    }

    public void setExceptionAttribute(String exceptionAttribute) {
        this.exceptionAttribute = exceptionAttribute;
    }

    public void setMailManager(MailManager mailManager) {
        this.mailManager = mailManager;
    }

    public void setFrom(String from) {
        this.from = from;
    }

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

    public void setTo(String to) {
        this.to = to;
    }
}