Since the lost focus seems to happen every 6000 milliseconds, I’d point the blame somewhere at expandone()/contractall() in /js/qm_scripts.js. Your login form is in the “dropmsg0” div, causing it to be briefly hidden and redisplayed every 6 seconds. The textboxes lose focus in IE8 when hidden. I’d either rename the div to exclude if from … Read more
Since you just want to refresh the current page,ajax is a better choice for you. For you current design,both forward and redirect are okay,but something need to pay attention: if you use redirect,you can set parameters via the url after forward or redirect,you need to query the exits comments,which means that you had can either … Read more
You need to load the com.mysql.jdbc.Driver driver class. private static final String DRIVER_NAME=”com.mysql.jdbc.Driver”; Look at the official documentation: The name of the class that implements java.sql.Driver in MySQL Connector/J is com.mysql.jdbc.Driver. The org.gjt.mm.mysql.Driver class name is also usable for backward compatibility with MM.MySQL, the predecessor of Connector/J. Use this class name when registering the driver, … Read more
Copy pasted your code in my servlet worked fine Check that you overrided doPost method in the servlet Check that you that your post metod work fine and return value, I use “DHC Rest Client” plugin for chrome. It is very cool tool Try to remove httpCon.connect() line. It is not necessary. From oracle docs … Read more
You cannot disable HttpSession on a servlet container, like Tomcat. Maybe Play framework would be a good approach for implementing your design. 1 solved Disable HTTPSession for stateless web services [duplicate]
I got a “null pointer exception” fault in java servlet. Could someone tell me what happens? And how to avoid that? That happens when you’re trying to access/invoke some reference which is actually null. SomeObject someObject = null; someObject.doSomething(); // Throws NullPointerException. You need to make sure that you only access/invoke it when it is … Read more
Open and close the row by <tr></tr> And iterate through your rows when it reaches your desired total then break out of the loop 1 solved LIMIT CELLS PER ROW IN JSP [closed]
You can compare like below Code: List<String> global = new ArrayList<String>; Map<String, ArrayList<String>> newMap = new HashMap<String, ArrayList<String>>(); Map<String, ArrayList<String>> map = new HashMap<String, ArrayList<String>>(); for (String key:map.keySet()) { List<String> arrayList= map.get(key); for (String words:arrayList) { List<String> newList = new ArrayList<String>; for (String globallist:global) { if(words.equals(globallist)){ newList.add(words); } } newMap.put(key,newList); } } 1 solved compare … Read more
Its an issue and it is never advisable to declare HttpServletRequest request/HttpServletResponse response as an instance variable. Actually Servlet is implementing single thread model that means only one servlet instance is created. And one thread for each request. So if their are many requests then thr must be many threads and each sharing same servlet … Read more
A NullPointerException, most of the time, means that you’re dereferencing a null variable. I assume the line causing the exception (line 97 in z.java, as the stack trace indicates) is the following line: yy.getXs().add(s); Then it can mean two things: yy is null The list returned by yy.getXs() is null. Use a debugger to identify … Read more
You can use Lucene, that’s a pretty good full text search engine. Since you are coding in Java it shouldn’t be difficult at all to implement your search feature from Lucene. solved How do I make an search bar at the top of the page like on stackoverflow.com?
The problem is that the radio groups in your HTML form have conflicting names. You’re using the following for all groups: name=”radio” What you need to do is to use a different name for each group; in order words, use the same name for each question within a single group. Assuming your question IDs are … Read more
You need write the image as a byte array to the response’s output stream. Something like this: byte[] imageBytes = getImageAsBytes(); response.setContentType(“image/jpeg”); response.setContentLength(imageBytes.length); response.getOutputStream().write(imageBytes); Then in you JSP you just use a standard img element: <img src=”url to your servlet”> Source: https://stackoverflow.com/a/1154279/1567585 solved How to display an image using inputstream in servlets?