jsp

问题 I am trying to understand how exactly scope attribute in jsp:useBean JSP action tag works. In my understanding scope is used to indicate where the bean is located (request,session,application etc.), but after some testing I came across an interesting situation where it's not the case, please consider the following JSP code (I am using scriplets here just for the sake of simplicity): <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" import=

问题 I have html form with two input field, which I am adding to json file on button click! JSON File { "data": { "names": [ { "no": 1, "name": "John" }, { "no": 2, "name": "Paul" } ] } } Java File String vNo = ""; String vNAme = ""; JSONParser parser = new JSONParser(); if(request.getParameter("save")!=null) { vNo = request.getParameter("no_form"); vName = request.getParameter("name_form"); JSONObject element = new JSONObject(); element.put("no", vNo); element.put("name", vName); JSONArray names

问题 I am developing a application in JSP/Servlet using MVC. In this application I want to load index.jsp as welcome page and this page retrieves the data from database. I did it. Now the problem is that when index.jsp page loads it fetches data from database but it shows it on browser as plain text and my CSS is not working for it. I know that during translation phase JSP is converted into servlet and after processing it send output to browser so during that we have to write the relative path of

问题 I'm trying to add water mark on image and video. For image i got the solution as below Image water marking code Method static void addWatermarkOnImage(String text, File sourceImageFile, File destImageFile) { try { BufferedImage sourceImage = ImageIO.read(sourceImageFile); Graphics2D g2d = (Graphics2D) sourceImage.getGraphics(); // initializes necessary graphic properties AlphaComposite alphaChannel = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.1f); g2d.setComposite(alphaChannel);

问题 I am using Google Chart to show my bubble chart. I used x, y number to locate the bubble, So I don't want to show the xnumber and ynumber column when i put cursor on.. How can I do that? Thanks a lot. enter image description here var options = { title: 'bubble graph', //legend:{position:'none'}, hAxis: { baseline:0, maxValue:200}, vAxis: { baseline:0, maxValue:100}, bubble: {textStyle: {fontSize: 11}}, width : '100%', height : '400px', backgroundColor: "transparent", tooltip: {trigger:

问题 I am using Google Chart to show my bubble chart. I used x, y number to locate the bubble, So I don't want to show the xnumber and ynumber column when i put cursor on.. How can I do that? Thanks a lot. enter image description here var options = { title: 'bubble graph', //legend:{position:'none'}, hAxis: { baseline:0, maxValue:200}, vAxis: { baseline:0, maxValue:100}, bubble: {textStyle: {fontSize: 11}}, width : '100%', height : '400px', backgroundColor: "transparent", tooltip: {trigger:

问题 response.setHeader("Content-Disposition", "attachment; filename=r.pdf"); Document document1 = new Document(PageSize.A4); PdfWriter pdfWriter=PdfWriter.getInstance(document1, response.getOutputStream()); pdfWriter.setPageEvent(new HeaderAndFooter(name)); try{ document1.open(); XMLWorkerHelper worker1 = XMLWorkerHelper.getInstance(); long seed =123; Random rnd = new Random (seed); Collections.shuffle(arrlist1,rnd); for(int i=0;i<nb;i++){ String str =(String) arrlist1.get(i); worker1.parseXHtml

问题 response.setHeader("Content-Disposition", "attachment; filename=r.pdf"); Document document1 = new Document(PageSize.A4); PdfWriter pdfWriter=PdfWriter.getInstance(document1, response.getOutputStream()); pdfWriter.setPageEvent(new HeaderAndFooter(name)); try{ document1.open(); XMLWorkerHelper worker1 = XMLWorkerHelper.getInstance(); long seed =123; Random rnd = new Random (seed); Collections.shuffle(arrlist1,rnd); for(int i=0;i<nb;i++){ String str =(String) arrlist1.get(i); worker1.parseXHtml

问题 I have a problem with Tomcat, it stopped working. I installed Tomcat 3 weeks ago and I have made more than 50 web dynamic projects, maven projects and everythings worked great. And today Tomcat stopped working. For example I make a project in Eclipse and when I try to run it I get this error: Server Tomcat v9.0 Server at localhost failed to start. I can start Tomcat from Windows services, and I can open http://localhost:8080/ page in browser, but I can't start Tomcat in eclipse. Not just for

问题 I have a problem with Tomcat, it stopped working. I installed Tomcat 3 weeks ago and I have made more than 50 web dynamic projects, maven projects and everythings worked great. And today Tomcat stopped working. For example I make a project in Eclipse and when I try to run it I get this error: Server Tomcat v9.0 Server at localhost failed to start. I can start Tomcat from Windows services, and I can open http://localhost:8080/ page in browser, but I can't start Tomcat in eclipse. Not just for