smart struts1 tips.

ActionServlet.java

public class ActionServlet extends org.apache.struts.action.ActionServlet {
  
  /**
   * 削除
   */
  @Override
  protected void doDelete(
      final HttpServletRequest req,
      final HttpServletResponse resp) throws ServletException, IOException {
    super.doPost(req, resp);// doPostへ
  }
  
  /**
   * 作成＆更新
   */
  @Override
  protected void doPut(
      final HttpServletRequest req,
      final HttpServletResponse resp) throws ServletException, IOException {
    super.doPost(req, resp);// doPostへ
  }
  
  /**
   * 読込
   */
  @Override
  public void doGet(
      final HttpServletRequest req,
      final HttpServletResponse resp) throws IOException, ServletException {
    super.doGet(req, resp);
  }
  
  /**
   * 作成
   */
  @Override
  public void doPost(
      final HttpServletRequest req,
      final HttpServletResponse resp) throws IOException, ServletException {
    super.doPost(req, resp);
  }
}

HttpMethodOverrideFilter.java

@WebFilter(filterName="HttpMethodOverrideFilter", urlPatterns="/*", servletNames="action")
public class HttpMethodOverrideFilter
  implements Filter
{
  public HttpMethodOverrideFilter(){}
  
  public void init(final FilterConfig config) throws ServletException {}
  public void destroy(){}

  public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain) throws IOException, ServletException
  {
    if(request instanceof HttpServletRequest)
      chain.doFilter(new HttpMethodOverrideServletRequest((HttpServletRequest)request), response);
    else
      chain.doFilter(request, response);
  }
}

HttpMethodOverrideServletRequest.java

public class HttpMethodOverrideServletRequest extends HttpServletRequestWrapper
{
  private final static String _METHOD = "_method";
  private final static String X_METHOD_OVERRIDE = "X-Method-Override";
  private final static String X_HTTP_METHOD_OVERRIDE = "X-HTTP-Method-Override";
  
  public HttpMethodOverrideServletRequest(final HttpServletRequest request)
  {
    super(request);
  }
  @Override
  public String getMethod() {
    
    final String[] methodOverrideValues = 
        new String[]{
          getParameter(_METHOD),
          getParameter(_METHOD.toUpperCase()),
          getParameter(X_METHOD_OVERRIDE.toLowerCase()),
          getParameter(X_METHOD_OVERRIDE.toUpperCase()),
          getParameter(X_HTTP_METHOD_OVERRIDE.toLowerCase()),
          getParameter(X_HTTP_METHOD_OVERRIDE.toUpperCase()),
          getHeader(X_METHOD_OVERRIDE),
          getHeader(X_METHOD_OVERRIDE.toUpperCase()),
          getHeader(X_HTTP_METHOD_OVERRIDE),
          getHeader(X_HTTP_METHOD_OVERRIDE.toUpperCase()),
    };
    
    for(final String methodOverrideValue : methodOverrideValues) {
      if (StringUtils.isNotEmpty(methodOverrideValue))
        return methodOverrideValue;
    }
    return super.getMethod();
  }
}