建立一个新的JSP文件:
<%@ page language="java" import="de.hunsicker.http.util.*"%>
<%
Browser eins = new Browser(request, session);
out.println(eins.getVersion());
%>
请将下列class文件加入classpath (你要建立同样的目录结构-- de.hunsicker.http.util，当然也可以自己调节包的名称。!):
package de.hunsicker.http.util;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Browser extends HttpServlet
{
protected HttpServletRequest request;
protected HttpSession session;
protected String userAgent;
protected String company; // Firmenname des Herstellers
protected String name; // Bezeichnung des Browsers
protected String version; // Version
protected String mainVersion; // Hauptversion
protected String minorVersion; // Unterversion
protected String os; // Betriebssystem
protected String language = "de"; // Sprachcode Standard
protected Locale locale; // Locale-Objekt mit den aktuellen
// Spracheinstellungen
private Hashtable supportedLanguages; // Untersttzte Sprachen
public Browser(HttpServletRequest request, HttpSession session)
{
this.initialize();
this.request = request;
this.session = session;
this.setUserAgent(this.request.getHeader("User-Agent"));
this.setCompany();
this.setName();
this.setVersion();
this.setMainVersion();
this.setMinorVersion();
this.setOs();
this.setLanguage();
this.setLocale();
}
public void initialize()
{
this.supportedLanguages = new Hashtable(2);
this.supportedLanguages.put("en", "");
this.supportedLanguages.put("de", "");
}
public void setUserAgent(String httpUserAgent)
{
this.userAgent = httpUserAgent.toLowerCase();
}
private void setCompany()
{
if (this.userAgent.indexOf("msie") > -1)
{
this.company = "Microsoft";
}
else if (this.userAgent.indexOf("opera") > -1)
{
this.company = "Opera Software";
}
else if (this.userAgent.indexOf("mozilla") > -1)
{
this.company = "Netscape Communications";
}
else
{
this.company = "unknown";
}
}
/**
* Liefert den Firmennamen des Herstellers des verwendeten Browsers.
*/
public String getCompany()
{
return this.company;
}
private void setName()
{
if (this.company == "Microsoft")
{
this.name = "Microsoft Internet Explorer";
}
else if (this.company == "Netscape Communications")
{
this.name = "Netscape Navigator";
}
else if (this.company == "Operasoftware")
{
this.name = "Operasoftware Opera";
}
else
{
this.name = "unknown";
}
}
/**
* Liefert den Namen des verwendeten Browsers.
*/
public String getName()
{
return this.name;
}
private void setVersion()
{
int tmpPos;
String tmpString;
if (this.company == "Microsoft")
{
String str = this.userAgent.substring(this.userAgent.indexOf("msie") + 5);
this.version = str.substring(0, str.indexOf(";"));
}
else
{
tmpString = (this.userAgent.substring(tmpPos = (this.userAgent.indexOf("/")) + 1, tmpPos + this.userAgent.indexOf(" "))).trim();
this.version = tmpString.substring(0, tmpString.indexOf(" "));
}
}
/**
* Liefert die Versionsnummer des verwendeten Browsers.
*/
public String getVersion()
{
return this.version;
}
private void setMainVersion()
{
this.mainVersion = this.version.substring(0, this.version.indexOf("."));
}
/**
* Liefert die Hauptversionsnummer des verwendeten Browsers.
*/
public String getMainVersion()
{
return this.mainVersion;
}
private void setMinorVersion()
{
this.minorVersion = this.version.substring(this.version.indexOf(".") + 1).trim();
}
/**
* Liefert die Unterversionsnummer des verwendeten Browsers.
*/
public String getMinorVersion()
{
return this.minorVersion;
}
private void setOs()
{
if (this.userAgent.indexOf("win") > -1)
{
if (this.userAgent.indexOf("windows 95") > -1