servlets

问题 I have a 3-tier application I have to modify. I'm totally new to the entire webstuff of Java, so bear with me please. Currently the application has a UI, Application and Database layer but I am attempting to decouple the SQL database from the database layer using dependency injection. So at some point I'm not going to need SQL server credentials in my application because the database backend might be plain text. The point is that the current SQL credentials are stored in the web.xml file as

问题 Does anyone know of a good tool for debugging JSPs from within Eclipse? I'd like to be able to set and watch breakpoints, step through the Java code/tags, etc within Eclipse while the app is running (under JBoss in my case). Presumably, it's reasonably straightforward to debug the servlet class that's generated from a JSP, but it's also fairly unappealing. 回答1: If you have WTP installed, you can set breakpoints within a JSP and they work fine in a regular "remote debug" session. However, once

问题 Does anyone know of a good tool for debugging JSPs from within Eclipse? I'd like to be able to set and watch breakpoints, step through the Java code/tags, etc within Eclipse while the app is running (under JBoss in my case). Presumably, it's reasonably straightforward to debug the servlet class that's generated from a JSP, but it's also fairly unappealing. 回答1: If you have WTP installed, you can set breakpoints within a JSP and they work fine in a regular "remote debug" session. However, once

问题 This question already has answers here : How to run a background task in a servlet based web application? (5 answers) Closed 2 years ago . I have developed a web application using using servlet and JSP. I am not using any framework per se, instead using my own home brewed MVC framework. I am using MySQL as a backend. I want to do the following: Clean up some data from the data base every hour Generate and store statistics about data every 15 minutes in an XML file somewhere The problem is:

问题 This question already has answers here : How do servlets work? Instantiation, sessions, shared variables and multithreading (8 answers) Closed 2 years ago . HttpServletRequest request; HttpServletResponse response; public void doGet(HttpServletRequest request , HttpServlet response){ this.request = request; this.response = response; } What happens if this servlet receives multiple requests at a time? We faced a response mismatch issue. Is this an issue? 回答1: Its an issue and it is never

问题 This question already has answers here : How do servlets work? Instantiation, sessions, shared variables and multithreading (8 answers) Closed 2 years ago . HttpServletRequest request; HttpServletResponse response; public void doGet(HttpServletRequest request , HttpServlet response){ this.request = request; this.response = response; } What happens if this servlet receives multiple requests at a time? We faced a response mismatch issue. Is this an issue? 回答1: Its an issue and it is never

问题 This question already has answers here : How do servlets work? Instantiation, sessions, shared variables and multithreading (8 answers) Closed 2 years ago . HttpServletRequest request; HttpServletResponse response; public void doGet(HttpServletRequest request , HttpServlet response){ this.request = request; this.response = response; } What happens if this servlet receives multiple requests at a time? We faced a response mismatch issue. Is this an issue? 回答1: Its an issue and it is never

问题 anyone have idea to slove my problem? I need to use servlet to println the jsp like this. <select name="users_province" id="users_province" class="form-control"> <option value="0" selected="selected">Province</option> <c:forEach items="${provincesList}" var="lists" > <option value="${lists.provinceCode}">${lists.provinceNameTh}</option> </c:forEach> </select> This is my servlet code. pw.println("<select name=\"users_province\" id=\"users_province\" class=\"form-control\">"); pw.println("

问题 I am trying to find out if it is possible to do proxy authentication in Java using jetty. I have been able to do basic and digest authentication schemes using jetty and there are easy ways in Jetty to set up these authentication schemes using pseudo code as this: constraint = org.mortbay.jetty.security.Constraint(); constraint.setName(constraint.('__BASIC_AUTH')) constraint.setRoles({'admin'}); constraint.setAuthenticate(true); constraintMapping = ConstraintMapping(); constraintMapping

问题 I am trying to find out if it is possible to do proxy authentication in Java using jetty. I have been able to do basic and digest authentication schemes using jetty and there are easy ways in Jetty to set up these authentication schemes using pseudo code as this: constraint = org.mortbay.jetty.security.Constraint(); constraint.setName(constraint.('__BASIC_AUTH')) constraint.setRoles({'admin'}); constraint.setAuthenticate(true); constraintMapping = ConstraintMapping(); constraintMapping