【下载文档:  使用JSP读取客户端信息.txt 】

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使用JSP读取客户端信息
使用JSP读取客户端信息 　 请阅读以下代码。如果你的使用要求不同，可对这些代码加以很方便的修改。这些代码可以使你获得： 公司company, 用户name，版本version，main version，minor version 操作系统(未完成!)，语言language，locale等。 建立一个新的JSP文件: 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 || this.userAgent.indexOf(\"win95\") > -1) { this.os = \"Windows 95\"; } if (this.userAgent.indexOf(\"windows 98\") > -1 || this.userAgent.indexOf(\"win98\") > -1) { this.os = \"Windows 98\"; } if (this.userAgent.indexOf(\"windows nt\") > -1 || this.userAgent.indexOf(\"winnt\") > -1) { this.os = \"Windows NT\"; } if (this.userAgent.indexOf(\"win16\") > -1 || this.userAgent.indexOf(\"windows 3.\") > -1) { this.os = \"Windows 3.x\"; } } } /** * Liefert den Namen des Betriebssystems. */ public String getOs() { return this.os; } private void setLanguage() { String prefLanguage = this.request.getHeader(\"Accept-Language\"); if (prefLanguage != null) { String language = null; StringTokenizer st = new StringTokenizer(prefLanguage, \",\"); int elements = st.countTokens(); for (int idx = 0; idx elements; idx++) { if (this.supportedLanguages.containsKey((language = st.nextToken()))) { this.language = this.parseLocale(language); } } } } /* * Hilfsfunktion fr setLanguage(). */ private String parseLocale(String language) { StringTokenizer st = new StringTokenizer(language, \"-\"); if (st.countTokens() == 2) { return st.nextToken(); } else { return language; } } /** * Liefert das L?nderkürzel der vom Benutzer * bevorzugten Sprache. */ public String getLanguage() { return this.language; } private void setLocale() { this.locale = new Locale(this.language, \"\"); } /** * Liefert ein Locale-Objekt mit der Sprach-Prferenz des verwendeten Browsers */ public Locale getLocale() { return this.locale; } }