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I was built my java web project with Glassfish , it worked perfectly but when I'm trying to use Tomcat because my friend who use Tomcat to run my project claimed that my project also work on his Tomcat too. The problem has begin , i got this :
java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
at org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:494)
at Controller.Admin.ProductManagerController.processRequest(ProductManagerController.java:177)
at Controller.Admin.ProductManagerController.doGet(ProductManagerController.java:184)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
My code :
package Controller.Admin;
import DAO.productDAO;
import Entity.Category;
import Entity.Color;
import Entity.Product;
import Entity.Size;
import Entity.User;
import java.io.IOException;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* @author vietth
*/
public class ProductManagerController extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html; charset=UTF-8");
String action = request.getParameter("action");
try {
HttpSession session = request.getSession();
User user = (User) session.getAttribute("user");
if (user != null && user.getIsAdmin().equalsIgnoreCase("true")) {
productDAO dao = new productDAO();
// Display product list
if (action == null || action.equals("")) {
List<Product> product = dao.getProductFull();
List<Size> size = dao.getSize();
List<Color> color = dao.getColor();
List<Category> category = dao.getCategory();
request.setAttribute("CategoryData", category);
request.setAttribute("ProductData", product);
request.setAttribute("SizeData", size);
request.setAttribute("ColorData", color);
request.getRequestDispatcher("/admin/product.jsp").forward(request, response);
}
// Navigate to product insertion page
if (action.equalsIgnoreCase("insert")) {
List<Category> category = dao.getCategory();
request.setAttribute("CategoryData", category);
request.getRequestDispatcher("/admin/productinsert.jsp").forward(request, response);
}
// Handle product insertion
if (action.equalsIgnoreCase("insertproduct")) {
String product_id = request.getParameter("product_id");
String category_id = request.getParameter("category_id");
String product_name = request.getParameter("product_name");
String product_price = request.getParameter("product_price");
String product_size = request.getParameter("product_size");
String product_color = request.getParameter("product_color");
String product_quantity = request.getParameter("product_quantity");
String product_img = "images/" + request.getParameter("product_img");
String product_describe = request.getParameter("product_describe");
product_id = (product_id == null || product_id.isEmpty()) ? "NEW" : product_id;
category_id = (category_id == null || category_id.isEmpty()) ? "1" : category_id;
product_name = (product_name == null || product_name.isEmpty()) ? "NEW" : product_name;
product_price = (product_price == null || product_price.isEmpty()) ? "0" : product_price;
product_size = (product_size == null || product_size.isEmpty()) ? "" : product_size;
product_color = (product_color == null || product_color.isEmpty()) ? "" : product_color;
product_quantity = (product_quantity == null || product_quantity.isEmpty()) ? "0" : product_quantity;
product_img = (product_img == null || product_img.isEmpty()) ? "default.jpg" : product_img;
product_describe = (product_describe == null || product_describe.isEmpty()) ? "No description" : product_describe;
int quantity = Integer.parseInt(product_quantity);
BigDecimal price = new BigDecimal(product_price);
int cid = Integer.parseInt(category_id);
Category cate = new Category(cid);
String[] sizeArray = product_size.split("\\s*,\\s*");
String[] colorArray = product_color.split("\\s*,\\s*");
List<Size> sizeList = new ArrayList<>();
for (String s : sizeArray) {
sizeList.add(new Size(product_id, s));
}
List<Color> colorList = new ArrayList<>();
for (String c : colorArray) {
colorList.add(new Color(product_id, c));
}
Product product = new Product();
product.setCate(cate);
product.setProduct_id(product_id);
product.setProduct_name(product_name);
product.setProduct_price(price);
product.setProduct_describe(product_describe);
product.setQuantity(quantity);
product.setImg(product_img);
product.setSize(sizeList);
product.setColor(colorList);
productDAO dao1 = new productDAO();
dao1.insertProduct(product);
response.sendRedirect("productmanager");
}
// Handle product update
if (action.equalsIgnoreCase("updateproduct")) {
String product_id = request.getParameter("product_id");
String category_id = request.getParameter("category_id");
String product_name = request.getParameter("product_name");
String product_price = request.getParameter("product_price");
String product_size = request.getParameter("product_size");
String product_color = request.getParameter("product_color");
String product_quantity = request.getParameter("product_quantity");
String product_img = "images/" + request.getParameter("product_img");
String product_describe = request.getParameter("product_describe");
int quantity = Integer.parseInt(product_quantity);
BigDecimal price = new BigDecimal(product_price);
int cid = Integer.parseInt(category_id);
Category cate = new Category(cid);
String[] sizeArray = product_size.split("\\s*,\\s*");
String[] colorArray = product_color.split("\\s*,\\s*");
List<Size> sizeList = new ArrayList<>();
for (String s : sizeArray) {
sizeList.add(new Size(product_id, s));
}
List<Color> colorList = new ArrayList<>();
for (String c : colorArray) {
colorList.add(new Color(product_id, c));
}
Product product = new Product();
product.setCate(cate);
product.setProduct_id(product_id);
product.setProduct_name(product_name);
product.setProduct_price(price);
product.setProduct_describe(product_describe);
product.setQuantity(quantity);
product.setImg(product_img);
product.setSize(sizeList);
product.setColor(colorList);
dao.updateProduct(product);
response.sendRedirect("productmanager");
}
// Handle product deletion
if (action.equalsIgnoreCase("deleteproduct")) {
String product_id = request.getParameter("product_id");
dao.deleteProduct(product_id);
response.sendRedirect("productmanager");
}
} else {
response.sendRedirect("user?action=login");
}
} catch (Exception e) {
e.printStackTrace();
response.sendRedirect("404.jsp");
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
@Override
public String getServletInfo() {
return "Product management servlet";
}
}
That's so funny when all my friends can use my code on Tomcat without me , lol , please help !
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