Question

我需要通过使用POST方法传递一些参数来重定向从重定向类到servlet（我需要像GET的Response.seeOther一样）：它有可能以任何方式吗？通过使用调试器并在浏览器中输入正确的URL，执行restlet类中的doSomething方法，然后执行servlet中的doPost方法并正确传递参数，显然没有任何异常，但浏览器没有什么都没有。我在doSomething方法中尝试的方式是正确的，还是让我尝试另一种方式？哪个是POST重定向的正确代码（如果可能的话）？ restlet类只有以下方法：

@GET
public void doSomething(
        @PathParam("request") String req,
        @PathParam("lang") String lang,
        @PathParam("query") String query) {

    try
    {
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost post = new HttpPost("http://localhost:8080/trypost/mainservlet");
        //post.setHeader("Content-Type", "application/x-www-form-urlencoded");
        HttpParams params = new BasicHttpParams();
        params.setParameter("REQUEST", URLEncoder.encode(req, "UTF-8"));
        params.setParameter("LANG", URLEncoder.encode(lang, "UTF-8"));
        params.setParameter("QUERY", URLEncoder.encode(query, "UTF-8"));
        post.setParams(params);
        HttpResponse response = httpClient.execute(post);   
    }
    catch(Exception ex)
    {
        ex.printStackTrace();
    }
}

servlet中doPost方法的代码如下：

protected void doPost(HttpServletRequest request,
        HttpServletResponse response) {

    String req = request.getParameter("REQUEST");
    String lang = request.getParameter("LANG");
    String query = request.getParameter("QUERY");

    try {
        PrintWriter w = response.getWriter();
        w.println("hello world by MainServlet");
        w.println(req);
        w.println(lang);
        w.println(query);
        w.close();
    } catch(IOException ex) {
        ex.printStackTrace();
    }
}

web.xml的代码如下：

<servlet>
    <servlet-name>MainServlet</servlet-name>
    <servlet-class>trypost.MainServlet</servlet-class>
    <init-param>
        <param-name>trypost.MainServlet.execOnGET</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
        <param-name>trypost.MainServlet.execOnPOST</param-name>
        <param-value>true</param-value>
    </init-param>
</servlet>
<servlet-mapping>
    <servlet-name>MainServlet</servlet-name>
    <url-pattern>/mainservlet/*</url-pattern>
</servlet-mapping>

<servlet>
    <servlet-name>Jersey REST Service</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>com.sun.jersey.config.property.packages</param-name>
        <param-value>trypost</param-value>
    </init-param>
    <init-param>
        <param-name>com.sun.jersey.spi.container.servlet.ServletContainer.execOnGET</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
        <param-name>com.sun.jersey.spi.container.servlet.ServletContainer.execOnPOST</param-name>
        <param-value>true</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>Jersey REST Service</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

通过POST方法传递参数，从重定向重定向到servlet

0 个答案: