GWT整合JSP案例

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目录结构：

以下是源码：

package com.app.client;import com.google.gwt.core.client.EntryPoint;import com.google.gwt.event.dom.client.ClickEvent;import com.google.gwt.event.dom.client.ClickHandler;import com.google.gwt.user.client.Window;import com.google.gwt.user.client.ui.Button;import com.google.gwt.user.client.ui.HorizontalPanel;import com.google.gwt.user.client.ui.RootPanel;import com.google.gwt.user.client.ui.TextBox;/** * Entry point classes define <code>onModuleLoad()</code>. */public class Test implements EntryPoint {/** * This is the entry point method. */public void onModuleLoad() {HorizontalPanel horPanel = new HorizontalPanel();final TextBox titleBox = new TextBox();Button btn = new Button("Send");btn.addClickHandler(new ClickHandler() {@Overridepublic void onClick(ClickEvent event) {String protocol = Window.Location.getProtocol();String host = Window.Location.getHost();Window.open(protocol + "//" + host + "/test/print?text="+titleBox.getValue(), "print", null);}});String protocol = Window.Location.getProtocol();String host = Window.Location.getHost();System.out.println(protocol);System.out.println(host);horPanel.add(titleBox);horPanel.add(btn);RootPanel.get().add(horPanel);}}

package com.app.print;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class PrintServlet extends HttpServlet {private static final long serialVersionUID = 1L;@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {doPost(req, resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {req.setCharacterEncoding("UTF-8");resp.setCharacterEncoding("UTF-8");req.setAttribute("text", req.getParameter("text"));req.getRequestDispatcher("/print.jsp").forward(req, resp);}}

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><style type="text/css"></style></head><body><h1>Text: <%= request.getAttribute("text") %> </h1></body></html>

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee               http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"         version="2.5"         xmlns="http://java.sun.com/xml/ns/javaee">  <!-- Servlets -->  <servlet>    <servlet-name>printservlet</servlet-name>    <servlet-class>com.app.print.PrintServlet</servlet-class>  </servlet>    <servlet-mapping>    <servlet-name>printservlet</servlet-name>    <url-pattern>/test/print</url-pattern>  </servlet-mapping>    <!-- Default page to serve -->  <welcome-file-list>    <welcome-file>Test.html</welcome-file>  </welcome-file-list></web-app>