Не могу вызвать проблему sendRedirect() после запуска Tomcat проекта Glassfish (но мой друг может) ⇐ JAVA

[Anonymous]

Я создал свой веб-проект Java с помощью Glassfish, он работал отлично, но когда я пытаюсь использовать Tomcat, потому что мой друг, который использует Tomcat для запуска моего проекта, заявил, что мой проект также работает и на его Tomcat. Проблема началась, у меня вот это:

Код: Выделить всё

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$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.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)

Мой код:

Код: Выделить всё

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 = dao.getProductFull();
List size = dao.getSize();
List color = dao.getColor();
List  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 = 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 sizeList = new ArrayList();
for (String s : sizeArray) {
sizeList.add(new Size(product_id, s));
}

List  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 sizeList = new ArrayList();
for (String s : sizeArray) {
sizeList.add(new Size(product_id, s));
}

List  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";
}
}

Это так забавно, когда все мои друзья могут использовать мой код на Tomcat без меня, лол, пожалуйста, помогите!


Подробнее здесь: https://stackoverflow.com/questions/793 ... sh-project