servlets

问题 I have 2 web apps, no front-end(i.e html/Jsp) in either. Both have one servlet each. Lets call them WebApp1/WebApp2 and ServiceServlet1/ServiceServlet2. I have 2 war files, WebApp1.war and WebApp2.war and both deployed. I call the ServiceServlet1 directly from the browser with - http://localhost:8080/WebApp1/ServiceServlet1 Obviously the doGet method will be called(POST is associated only with FORM, correct me if I am wrong). The ServiceServlet1 is build something like - public class

问题 I saw a lot people has similar problem but no answer works for me. What I'm doing is trying to embed Jetty with Spring 4 with zero configuration. I put some of my code below for better describe my question: JettyStarter.class public class JettyStarter { ... private static final String CONFIG_LOCATION = "com....config"; private static final String DEFAULT_MAPPING_URL = "/*"; private static final String DEFAULT_CONTEXT_PATH = "/"; ... private ServletContextHandler getServletContextHandler()

问题 To improve my java skills, I'm trying to build a simple j2ee framework (MVC). I built it to handle every request in a FrontServlet. Here is the mapping that I used : web.xml : <servlet> <servlet-name>Front</servlet-name> <servlet-class>test.FrontServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>Front</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping> My problem is that when I forward the request from the FrontServlet to a JSP, obviously, the JSP request is handle

问题 Servlet uses a javax.servlet.http.HttpServletResponse object to return data to the client request. How do you use it to return the following types of data? a. Text data b. Binary data 回答1: Change the content type of the response and the content itself of the response. For text data: response.setContentType("text/plain"); response.getWriter().write("Hello world plain text response."); response.getWriter().close(); For binary data ,usually for file downloading (code adapted from here): response

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 I'm trying to use the OneLogin API to create my own Single Sign On Portal. As such, I need to call the 'session_via_api_token' method to establish a session and load the OneLogin domain cookies. The documentation shows example usage of the method by submitting an html form post. As far as I can tell, the example isn't just one way to do it... it's THE ONLY way to do use it. I would really prefer not to have to use a form post. From experimenting, it seems that I cannot call it via javascript

问题 I'm trying to call my servlet GET method and pass value from html select by using onChange . So far I have something like this. <form name="form1" action="http://localhost:8080/MainServlet/main" method="GET"> <input type=hidden name="action" value="checking"> <div class="select123" onchange="javascript:document.form1.submit();"> <select> <option selected="" value=""></option> <option value="">1</option> <option value="">2</option> <option value="">3</option> <option value="">4</option> <

问题 I'm taking over an existing Spring MVC project, and need to modify it's behavior, I added a servlet filter to intercept all incoming requests, some URLs of this app has the following format : http://example.com/SupportCenter/abc.html?token=some_token_value I want to get the token value before anything else happens, but since this app has a security login page, if you are not logged in, and you try to get to the above URL, it will direct you to the login page at : http://example.com

问题 java code pResponse.setHeader("content-type", "text/plain;chartset=UTF-8"); pResponse.setContentLength(resultsJson.length()); Writer out = pResponse.getWriter(); String escapedJsonString = StringEscapeUtils.escapeJavaScript(resultsJson); out.write(escapedJsonString); The purpose to escape the return text is because there are some accented character in 'resultsJson' and even though I set charset=UTF-8, I still get garbled text from ajax. check this question from me ajax garbled text ajax code

问题 I am using a D3 api in which i am representing some hierarchy between the nodes through links between them.all the data comes from database when i load the page.But here i have a criteria where i have to filter top 3 or 5 nodes i.e i have a select box here where i have values from 1 to 5.Now if i go for 2 the database will return the hierarchy for 2nd level.But i have a problem here when i load the page ,onload it will return a default level from the database,but when i go for 2nd or 3 rd