небольшой пример по теме проблемы
сервлет Page1Servlet
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 Page1Servlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,
IOException {
request.getRequestDispatcher("/jsp/page1.jsp").forward(request, response);
}
}
jsp страница - page1.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Page1</title>
</head>
<body>
<a href="page2?var1=123&var2=456">press me</a>
</body>
</html>
сервлет Page2Servlet:
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 Page2Servlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
if(request.getParameter("back_button") != null) {
response.sendRedirect("page1?var1=789");
return;
}
String var1 = request.getParameter("var1");
String var2 = request.getParameter("var2");
request.setAttribute("var1", var1);
request.setAttribute("var2", var2);
request.getRequestDispatcher("/jsp/page2.jsp").forward(request, response);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
}
jsp страница - page2.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Page1</title>
</head>
<body>
var1=<%=request.getAttribute("var1")%><br/>
var2=<%=request.getAttribute("var2")%><br/>
<form method="post">
<input type="submit" value="go back to page1" name="back_button"/>
</form>
</body>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<servlet>
<servlet-name>page1</servlet-name>
<servlet-class>Page1Servlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>page1</servlet-name>
<url-pattern>/page1</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>page2</servlet-name>
<servlet-class>Page2Servlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>page2</servlet-name>
<url-pattern>/page2</url-pattern>
</servlet-mapping>
</web-app>
</html>
и вот после того как я возвращаюсь на первую страницу через кнопку на второй - проблема как избавится от var1=789 в строке URL?
