servlet-3.0

问题 I want to call a servlet's POST method from another application, in which I am passing request and response. Can anyone tell me how is that possible? 回答1: If your servlet is invoked in an HTTP POST then you can do an HTTP 307 redirect to another servlet and it will call it's doPost. If you want to POST to a different page from a servlet (or any Java method) you can compose a POST with something like HttpClient like this: PostMethod post = new PostMethod("http://jakarata.apache.org/");

问题 I want to use 3.0 servlet-api with Jetty 8. Currently 2.4 servlet-api is defined in my web.xml. And in the webdefault.xml 2.5 servlet-api is defined. Someone else set this up so they very well might have done something wrong. Which servlet-api version am I actually using? 2.4 or 2.5? I have 3.0 already in my classpath. What do I need to change in web.xml and/or webdefault.xml to get it working? Thank you in advance. 回答1: You normally don't provide the Servlet API yourself. This is normally to

问题 suppose that I want to accept the following urls: http://myserver/myapplication/posts http://myserver/myapplication/posts/<id> http://myserver/myapplication/posts/<id>/delete how can I use the servlet decorator @WebServlet to do so? I'm investigating value and urlPatterns but I don't get how to do so. For example, @WebServlet(urlPatterns={"/posts", "/posts/*"}) [..] String param = request.getPathInfo(); gives me some result, but how to use it? Also, request.getPathInfo() seems to return the

问题 I want to upgrade my webapp to use servlet 3.0 (insetd of 2.5). I am using WebLogic Server Version: 12.1.1.0 (12c),maven,java 7_10 and NetBeans 7.3.1 For some reason the only available servlet-api is 3.0-alpha-1 and not 3.0 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <dependencies> <dependency>

问题 I'm trying to create a small servlet that uploads images and is able to retrieve them in a different page as a slideshow. I'm able to save them outside the WebApp folder, but while retrieving them I need them to be a part of a JSP which will have other content, apart from the images. Currently, I'm using BufferedImage and ImageIO classes to stream the images one at a time. BufferedImage image = ImageIO.read(new File("D:\\"+file.getName())); ImageIO.write(image, "jpg", response.getOutputStream

问题 I need to retrieve images from my database. For this I used jquery and servlet to retrieve all images stored in a table. But when i run the code it produces HTTP Status 500 - class oracle.jdbc.driver.OracleBlobInputStream declares multiple JSON fields named maxPosition I'm a newbie in Jquery I don't know how to use JSON for images. My Servlet is: protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String uname;// = request

问题 Seems like the slow Tomcat 7 startup problem can be resolved with "metadata-complete" set to "true" in the web.xml, like so: <?xml version="1.0" encoding="UTF-8"?> <web-app metadata-complete="true" id="WebApp_ID" version="3.0"... The problem is that Tomcat scans for annotations at startup, and this significantly slows it down. My time is cut down from 25 secs to 5 secs. (More info here: Tomcat and Servlet 3.0 Web Configuration) However, I have some annotations in my code, like: @ManagedBean

问题 This has been driving me nuts. So I have a (very simple vanilla servlet 3) web app. When I run it in eclipse all is fine. Among others I am able to register an account with Unicode (greek) username and then log in as site admin and visit the user's profile alright. When I export war to $CATALINA_HOME\webapps , launch $CATALINA_HOME\bin\startup.bat , open the site in the browser, login as admin and try to visit the user profile the username etc display as blank. The files in ...\apache-tomcat

问题 I'm migrating my application from using the web.xml to configure the servlet to use a class implementing WebApplicationInitializer to configure my web application. After migrating everything to that class implementing WebApplicationInitializer I cannot start my application, it complains because it cannot inject a bean that has been declared with a request scope. I added in the servlet context the RequestContextListener but it still failing to inject the bean. This is the stack trace the

问题 java.lang.AbstractMethodError: javax.ws.rs.core.UriBuilder.uri(Ljava/lang/String;)Ljavax/ws/rs/core/UriBuilder; at javax.ws.rs.core.UriBuilder.fromUri(UriBuilder.java:119) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:289) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:221) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain