servlets

问题 i have just started working with tomcat and servlet. after running some html page i was trying to run this timeform.it's giving me page.but when i click on submit page it give me this error instead of time.please help me. import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import java.util.*; import java.text.*; public class TimeForm extends HttpServlet { private static final String CONTENT_TYPE = "text/html"; private Locale[] allLocale = Locale.getAvailableLocales();

问题 Using a file upload in my project as : <s:form id="uploadData" action="UploadAction" namespace="xyz" validateFields="false" method="post" enctype="multipart/form-data"> But the request.getContentLength() method returns correct value for less than 2 gb and 0 for anything above it. The probable reason being datatype of the content-length as int. Is there any other way where the request parameter: content-length can be converted into long type in order to support uploads greater than 2gb. please

问题 //dopost methode @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String password = null; response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); String parm; parm=request.getParameter("user_name"); String User_name=parm; parm=request.getParameter("National"); int National_ID=Integer.parseInt(parm); try{ Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); con

问题 //dopost methode @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String password = null; response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); String parm; parm=request.getParameter("user_name"); String User_name=parm; parm=request.getParameter("National"); int National_ID=Integer.parseInt(parm); try{ Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); con

问题 I tried to deploy the servlets. I have a inner class, but it seems like the complier cannot find the inner class. It generates the java.lang.ClassNotFoundException exception. Below is my servlets java code, web.xml, error message. Hope someone could help me. Thank you in advance. Servlet java code package com.tutorials; import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.IOException; import java.io

问题 Note: this is not cross-posting (although it's related to my other question shared objects between webapps of the same tomcat) I have 2 webapps running at two contexts: c1, c2 (both immediately after the root). I put a startupListener in c1 to share a variable, and another one in c2 to retrieve it. The problem is if I share an object of built-in datatypes (like HashMap, Integer,...) it is ok, but custom datatype can't be cast. For example, if I have a custom class named User, and pass an

问题 I have javaee project. I want to send image file to my servlet via ajax. Ajax not sending image file to my java class. But it is sending textarea value. Here is my form <form enctype="multipart/form-data" beanclass="ActionBean"> <input type="file" id="uploadFile" name="newAttachment"/> <textarea name="name" id="name" rows="2" cols="30"></textarea> <s:submit value="Edit" name="saveOfferInfo" onclick="return edit(this);" /> JavaScript function: function edit(button) { var form = button.form;

问题 I have a spring project and everything worked fine. My gradle dependencies compile has the following compile 'org.springframework:spring-core:4.1.2.RELEASE', 'org.springframework:spring-web:4.1.2.RELEASE', 'org.springframework:spring-webmvc:4.1.2.RELEASE', 'org.springframework:spring-orm:4.1.2.RELEASE', 'org.springframework:spring-context:4.1.2.RELEASE', 'org.springframework:spring-tx:4.1.2.RELEASE', 'commons-dbcp:commons-dbcp:1.4', 'mysql:mysql-connector-java:5.1.6', 'org.hibernate:hibernate

问题 I'm supporting a web application / Java servlet that has been failing to start. The issue turns out to be a relatively straight-forward java.lang.NoClassDefFoundError exception, thrown by org.apache.webapp.balancer.RulesParser . The filter class that throws the exception expects the Digester class to exist in the package: org/apache/tomcat/util/digester That package doesn't appear to exist in the application lib, but there is an instance of the class in: org/apache/commons/digester Which is

问题 in servlet, as we can access the real path of deployed project ServletContext context = getServletConfig().getServletContext(); string contextStr = context.getRealPath("....."); How can i access the deployed project path in JSP page, any idea please ? 回答1: <%=request.getRealPath("write_your_file_name")%> 回答2: It should work just the same, for example by accessing ${pageContext.servletContext.getRealPath("...")} to get the same results. JSP are nothing more than servlets after they got