servlets

Referencing servlet in HTML file for .war file in Tomcat

由 拥有回忆 提交于 2020-05-17 06:37:05
问题 I have created an index.html file for a Java (.war) application that I deployed on tomcat. I already have a Java Servlet file that queries a remote db server for a picture i stored there. The java servlet file is called ImageServlet.java. I need the HTML page to display that image that the ImageServlet.java queries. I just don't know how I'm able to reference to the servlet as it retrieves my picture. Below is the ImageServlet file: package test; import java.io.ByteArrayOutputStream; import

Why JSP is not supporting 'put' method on form? Is there any way to use put method on jsp form? [duplicate]

由 喜欢而已 提交于 2020-05-13 21:14:30
问题 This question already has answers here : Using PUT method in HTML form (6 answers) Closed 5 years ago . I am trying to implement put method in JSP form, but seems like it is supported, what is the reason behind it ? Where if i am using HTML instead of JSP and calling a servlet implemented to accept put request, then it is working as expected. but same code is not working on JSP. Example of HTML Which is working "index.html">>> <html> <head> <meta http-equiv="Content-Type" content="text/html;

Why JSP is not supporting 'put' method on form? Is there any way to use put method on jsp form? [duplicate]

由 て烟熏妆下的殇ゞ 提交于 2020-05-13 21:13:52
问题 This question already has answers here : Using PUT method in HTML form (6 answers) Closed 5 years ago . I am trying to implement put method in JSP form, but seems like it is supported, what is the reason behind it ? Where if i am using HTML instead of JSP and calling a servlet implemented to accept put request, then it is working as expected. but same code is not working on JSP. Example of HTML Which is working "index.html">>> <html> <head> <meta http-equiv="Content-Type" content="text/html;

Java Servlet 3.0 File Upload - Removing TMP Files

由 落爺英雄遲暮 提交于 2020-05-13 19:13:07
问题 I'm using the Java Servlet 3.0 to upload files, using the @MultipartConfig annotation and request.getParts() to obtain the files. When a file is uploaded, a TMP file is created in the Web Application work directory ( tomcat/work/Catalina/localhost/webappname ). For example: upload_7c59101b_9f97_4e3f_9fa5_e484056d26fa_00000209.tmp The application copies the file to another directory on the server - I'm doing this using the part.write() method but it's also working by obtaining the input stream

One Servlet per path or handle multiple paths in a Servlet?

由 ☆樱花仙子☆ 提交于 2020-05-13 07:48:56
问题 I'm wondering what is the best practice in handeling servlets when dealing with a many pages in a website. Most GET requests in servlets simply return a new jsp page. I had thought of two approaches: Assign a servlet for each path in the webiste e.g a homeservlet for home page, registerservlet for registration page, loginservlet for login page etc. Have a small number of servlets that process multiple paths and handle them accordingly e.g. A UserServlet that could do the job of registration

One Servlet per path or handle multiple paths in a Servlet?

由 社会主义新天地 提交于 2020-05-13 07:48:11
问题 I'm wondering what is the best practice in handeling servlets when dealing with a many pages in a website. Most GET requests in servlets simply return a new jsp page. I had thought of two approaches: Assign a servlet for each path in the webiste e.g a homeservlet for home page, registerservlet for registration page, loginservlet for login page etc. Have a small number of servlets that process multiple paths and handle them accordingly e.g. A UserServlet that could do the job of registration

How to update data in JSP/Servlet

由 和自甴很熟 提交于 2020-05-09 17:17:41
问题 I am beginner in JSP/Servlet and I am stuck. I would like to edit a form but my page is empty after the modification. Here is an example 1) I click on udpate 2) I change the values 3) When I click on Update, I have an empty page, I don't understand the problem? Here is my servlet (UserHandler) public class UserHandler extends HttpServlet { private static String INSERT = "/user.jsp"; private static String Edit = "/edit.jsp"; private static String UserRecord = "/listUser.jsp"; private UserDao

@WebServlet fails in Netbeans 11.0 with java.lang.RuntimeException: com.example.NewServlet.<init>(NewServlet.java:1)

由 六月ゝ 毕业季﹏ 提交于 2020-05-04 05:32:03
问题 Some kind of nightmare - can not launch primitive servlet on Apache Tomcat 9.0.22 (or Glassfish 5.0.1) and Apache NetBeans IDE 11.0 (Build incubator-netbeans-release-404-on-20190319) by using servlet annotations.. Using JDK 1.8u221. Here is the code: @WebServlet(name = "NewServlet", urlPatterns = {"/meow"}) public class NewServlet extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response

@WebServlet fails in Netbeans 11.0 with java.lang.RuntimeException: com.example.NewServlet.<init>(NewServlet.java:1)

由 空扰寡人 提交于 2020-05-04 05:31:51
问题 Some kind of nightmare - can not launch primitive servlet on Apache Tomcat 9.0.22 (or Glassfish 5.0.1) and Apache NetBeans IDE 11.0 (Build incubator-netbeans-release-404-on-20190319) by using servlet annotations.. Using JDK 1.8u221. Here is the code: @WebServlet(name = "NewServlet", urlPatterns = {"/meow"}) public class NewServlet extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response

@WebServlet fails in Netbeans 11.0 with java.lang.RuntimeException: com.example.NewServlet.<init>(NewServlet.java:1)

由 橙三吉。 提交于 2020-05-04 05:30:47
问题 Some kind of nightmare - can not launch primitive servlet on Apache Tomcat 9.0.22 (or Glassfish 5.0.1) and Apache NetBeans IDE 11.0 (Build incubator-netbeans-release-404-on-20190319) by using servlet annotations.. Using JDK 1.8u221. Here is the code: @WebServlet(name = "NewServlet", urlPatterns = {"/meow"}) public class NewServlet extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response
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