servlets

问题 I have written a jsp code which links to a servlet and that links to a servlet again. The code, mahi1.jsp <form action="mahi5" method="post"> <center> <table> <tr> <td> <h1><center> SIGN IN </center></h1> </td> </tr> <tr> <td> Email:<nbsp> <nbsp> </td> <td> <input type="text" name="user" value="" size="20" /> </td> </tr> <tr> <td>Password:<nbsp> <nbsp></td> <td> <input type="password" name="pass" value="" size="20" /> </td> </tr> <tr> <td> <input type="submit" value="submit" /> </td> </tr> <

问题 I have a form, basically to upload a file. I am submitting the form twice, 1 without multipart and the 2nd 1 with multipart. <input type="button" tabindex="5" value="Create" id="btnS" class="btn" onClick="submitForm(this.form,'/test/upload'); return false;" /> //1st submission form.setAttribute("action",url_action); form.setAttribute("method","post"); form.submit(); //2nd submission form.setAttribute("action",url_action); form.setAttribute("method","post"); form.setAttribute("enctype",

问题 This question already has an answer here : Closed 7 years ago . Possible Duplicate: how to display a pdf file in jsp using servlet I retrieve a pdf file from my database and put it in a file like this String str="select * from files where name='Security.pdf';"; Statement stmt2= conn.createStatement (ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE); rs = stmt2.executeQuery(str); while(rs.next()) { InputStream input = rs.getBinaryStream("content"); //to create file File f=new File(

问题 Is the ServletContext and Session object which we get from request object (HttpServletRequest) behave the same ? 回答1: Sessions are user specific. Servlet contexts are essentially global (within the context of that servlet), meaning all users who hit that servlet will share the same servlet context. 来源： https://stackoverflow.com/questions/2076389/servletcontext-and-session-object

问题 One strategy for handling validation of a form that is posted to a Java Servlet is to forward back to the original JSP view on validation failure. This allows the user to see that there was a validation failure in the context of the form they just submitted (perhaps they didn't provide a value for a required field), and then they can retry. However, since this strategy doesn't follow the well known Post-Redirect-Get pattern (http://en.wikipedia.org/wiki/Post/Redirect/Get) it suffers in that

问题 I am new in jsp and faced with one problem. I need to create jsp page, that displays data from servlet. Servlet code: protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { CustomersDao customersDao = new CustomersDaoImpl(); List<Customers> custList = customersDao.getAllCustomers(); request.setAttribute("customersList", custList); request.getRequestDispatcher("/test.jsp").forward(request, response); } jsp page code: <%@page

问题 This question already has answers here : Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available” (10 answers) Closed 3 years ago . I created a sample Dynamic Web Project in Eclipse, but when I am running my project with Tomcat 5.5 i am getting this error: HTTP Status 404 - /greetingservlet/ type Status report message /greetingservlet/ description The requested resource (/greetingservlet/) is not available. My HTML/JSP source code is: <!DOCTYPE greeting SYSTEM

问题 This question already has answers here : Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available” (10 answers) Closed 3 years ago . I created a sample Dynamic Web Project in Eclipse, but when I am running my project with Tomcat 5.5 i am getting this error: HTTP Status 404 - /greetingservlet/ type Status report message /greetingservlet/ description The requested resource (/greetingservlet/) is not available. My HTML/JSP source code is: <!DOCTYPE greeting SYSTEM

问题 I am confused about the meaning of request.getContextPath(). My file layout is as follows: MyServer/WebContent: /Resources/MyImage.jpg /Resources/Scripts/MyScript.js /WEB-INF/JSP/MyPage.jsp In the MyPage.jsp I am able to locate the JavaScript and image by <script src="${pageContext.request.contextPath}/Resources/Scripts/MyScript.js"> and <img src="${pageContext.request.contextPath}/Resources/MyImage.img"> From this I concluded that ${pageContext.request.contextPath} dynamically resolved to

问题 I have this configured in my server.xml file <Connector URIEncoding="UTF-8" connectionTimeout="20000" maxHttpHeaderSize="65536" **maxPostSize="1024"** port="8080" protocol="HTTP/1.1" redirectPort="8443"/> However, requests more than 1 KB pass as if maxPostSize is never set. Can anyone suggest what can cause that? Another thing, I would like to know how to make a custom http reply from tomcat if the post size is more than 1 KB UPDATE Since I have been for so long in this issue. I had the