如何将 URL 中的路径参数映射到 Struts 2 中的操作

我们正在使用 convention-plugin，似乎我们应该在 Struts 过滤器之前获取 URL。将其更改为 Valid，然后让 Struts 完成其余工作。/my.action/param1/value1url/my.action?param1=value1

自己做起来并不容易，幸运的是，有一个解决方案可以在 struts 过滤器前面使用 urlrewrite 过滤器。请参阅为什么 URL 重写在 Struts 2 中不起作用：

如果将 Tuckey URL 重写筛选器放在 Web 应用程序部署描述符中的 Struts2 筛选器之前，则可以重写任何 URL。使用本指南：Tuckey URLRewrite How-To。

然后，添加一个规则来重写 URL，如下所示：

<rule match-type="regex">  
  <from>/my.action/param1/(\w+)</from>
  <to>/my.action?param1=$1</to>
</rule>

我更喜欢@RomanC解决方案，因为它不需要代码:)

如果您想自己开发它，这里是另一种解决方案。

这个想法是使用和更改并使 url 成为有效的 struts 操作。同时实现以生成有效的查询字符串HttpServletRequestWrappergetRequestURIgetServletPathgetParameterMap

@WebFilter(filterName = "UrlToActionMapperFilter")
public class UrlToActionMapperFilter implements Filter {

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
        throws IOException, ServletException {
    
    HttpServletRequest httpRequest = (HttpServletRequest) request;
    ChangedURIRequestWarpper warpperdRequest = new ChangedURIRequestWarpper(httpRequest);
    chain.doFilter(warpperdRequest, response);

}

public class ChangedURIRequestWarpper extends HttpServletRequestWrapper {

    private final Logger LOG = LoggerFactory.getLogger(ChangedURIRequestWarpper.class);
    private static final String CALLBACKURI = "foo/bar.action";
    private static final String URL_PARAMETERS_REGEX = "(\\w+\\/\\w+)";
    private final Pattern URL_PARAMETERS_PATTERN = Pattern.compile(URL_PARAMETERS_REGEX);

    public ChangedURIRequestWarpper(HttpServletRequest request) {       
        // So that other request method behave just like before
        super(request);
    }

    /**
     * read the parameters from url which is defined as /param1/value1/param2/value2
     * and set them to parameter map
     *  
     */
    @Override
    public Map<String, String[]> getParameterMap() {
        LOG.debug("get the parameters from {}, and set them in parameters map", super.getRequestURI());
        Map<String, String[]> parameters = new HashMap<>();

        //The queryString is /param1/value1/param2/value2
        String queryString = StringUtils.substringAfter(super.getRequestURI(), CALLBACKURI);

        Matcher matcher = URL_PARAMETERS_PATTERN.matcher(queryString);

        while (matcher.find()) {
            String[] keyValue = matcher.group(1).split("/");
            LOG.debug("Set {} in parameters map " , (Object)keyValue);          
            parameters.put( keyValue[0], new String[] {  keyValue[1] });
        }

        return parameters;
    }
    
    /**
     * struts use getRequestURI and getServletPath to determine if it should handle request ot not
     * As this url is fixed we can hardcode it.
     */
    @Override
    public String getRequestURI() {
        return "/"+CALLBACKURI;
    }

    @Override
    public String getServletPath() {
        return "/"+CALLBACKURI;
    }


}

}

在：web.xml

<filter-mapping>
    <filter-name>UrlToActionMapperFilter</filter-name>
    <!-- if you want to change it remember to change ChangedURIRequestWarpper  -->
    <url-pattern>/foo/bar.action/*</url-pattern>
</filter-mapping>