servlets

问题 My view is HTML 5. I'm using FormData to make a AJAX 2 POST to a Servlet. Inside the servlet i'm trying to read request parameters. I can't see any parameters. However, Google Chrome Dev console shows the request payload. How can I get the same in Servlet code? Any help will be appreciated. Here's the code. JS code var xhr = new XMLHttpRequest(); var formData = new FormData(); formData.append('firstName', 'ABC'); formData.append('lastName', 'XYZ'); xhr.open("POST", targetLocation, true); xhr

问题 I'm working on a setup that takes an http request (GET for testing purposes) to java servlet. How it works is, the ser let takes a request from the browser, parses it and sends it via TCP socket to the 'main' server, which processes the request and sends a response back. The servlet then pulls the HttpServletResponse that was previously stored in an ConcurrentHashMap, opens up the PrintWriter, and sends a response back. Everything's going smoothly, except that the HttpServletResponse doesn't

问题 I'm working on a setup that takes an http request (GET for testing purposes) to java servlet. How it works is, the ser let takes a request from the browser, parses it and sends it via TCP socket to the 'main' server, which processes the request and sends a response back. The servlet then pulls the HttpServletResponse that was previously stored in an ConcurrentHashMap, opens up the PrintWriter, and sends a response back. Everything's going smoothly, except that the HttpServletResponse doesn't

问题 Wondering how can I do the following in JSP/Servlets: Upload a zip file (containing multiple CSV files) Unzip the file to obtian the CSV files Read the CSV files and pump the records into a mySQL database Note: mySQL table is set up and ready for CSV files inputs. Thanks in advance. 回答1: 1: Upload a zip file (containing multiple CSV files) Use a multipart/form-data form with input type="file" in HTML/JSP to be able to select a file and upload it. Use Apache Commons FileUpload in the Servlet

问题 I'm learning Java servlets and I wrote two separate servlets for "GET" and "POST". When a "GET" request is sent to the server, the servlet accesses the database and retrieves everything and converts the result to the format that can be recognized by Google Charts. And when a "POST" request is sent to the server, the servlet gets the parameters and adds them to a Java object and then the DAO adds the data to the database. However, when I hit the "add" button after the input, the web app cannot

问题 I'm learning Java servlets and I wrote two separate servlets for "GET" and "POST". When a "GET" request is sent to the server, the servlet accesses the database and retrieves everything and converts the result to the format that can be recognized by Google Charts. And when a "POST" request is sent to the server, the servlet gets the parameters and adds them to a Java object and then the DAO adds the data to the database. However, when I hit the "add" button after the input, the web app cannot

问题 I'm learning Java servlets and I wrote two separate servlets for "GET" and "POST". When a "GET" request is sent to the server, the servlet accesses the database and retrieves everything and converts the result to the format that can be recognized by Google Charts. And when a "POST" request is sent to the server, the servlet gets the parameters and adds them to a Java object and then the DAO adds the data to the database. However, when I hit the "add" button after the input, the web app cannot

问题 I'm learning Java servlets and I wrote two separate servlets for "GET" and "POST". When a "GET" request is sent to the server, the servlet accesses the database and retrieves everything and converts the result to the format that can be recognized by Google Charts. And when a "POST" request is sent to the server, the servlet gets the parameters and adds them to a Java object and then the DAO adds the data to the database. However, when I hit the "add" button after the input, the web app cannot

问题 I'm learning Java servlets and I wrote two separate servlets for "GET" and "POST". When a "GET" request is sent to the server, the servlet accesses the database and retrieves everything and converts the result to the format that can be recognized by Google Charts. And when a "POST" request is sent to the server, the servlet gets the parameters and adds them to a Java object and then the DAO adds the data to the database. However, when I hit the "add" button after the input, the web app cannot

问题 I have written sample web application with servlets and jsp. As per the below code the action url should be executed automatically according to the "onload". I have written this below code in one of my servlet, The below "onload" form hits the path in action only in Firefox and IE but not in Chrome(41.0.2272.74 beta-m (64-bit)).I have seen the link Chrome - is not working but i did not get proper idea, I have my below code in the end of servelt. there is nothing to execute after this code in