アプレットとJSP通信

クライアント側でアプレットを読み込んだ後に動的に割り当てられる変数の値を取得したい。アプレットはJSPページに埋め込まれています。そのJSPページ内で、私はその価値を得たいと思っています。アプレットとJSP通信

public class CheckJavaVersion extends Applet 
{ 
private static Label versionCheck; 
public static String javaVersion; 
public void init() 
{ 
try 
{ 
Color colFrameBackground = new Color(198, 0, 0); 
this.setBackground(colFrameBackground); 
versionCheck = new Label("Java Version:"+System.getProperty("java.version")); 
this.add(versionCheck); 
javaVersion = versionCheck.getText(); 
} 
}

JSPページ：ソースコードは以下の通りです

<html> 
<head><title>Display Java Version</title> 
</head> 
<body> 
<jsp:plugin code="com.applets.CheckJavaVersion" codebase="/AppletURLComm" type="applet"> 
</jsp:plugin> 
</body> 
</html>

は、今私は、JSPページにjavaversion変数にアクセスしたいです。その変数にアクセスすると、nullの値が与えられます。変数を値で取得するには？

出典

2011-01-31 user596761

これはJSPとは関係ありません。クライアント（アプレット）に存在する変数を取得する必要があります。だからあなたはjavascriptでこれを行う必要があります。 See hereとhere

出典

2011-01-31 14:30:52 Bozho

非常に役立つリンク:) –

*package thumb; 
/** 
* @author Ravi Thapa 
* @since May 20, 2014 
* @version 1.0 This class will get thumb impression image and verification 
* String 
*/ 
public class ThumbVerification extends JApplet 
     implements ActionListener { 
     base64Image = null; 
     base64FMR = null; 
/* 
here is code for thumb image capture code 
*/ 

    public static byte[] decodeImage(String imageDataString) { 
     return Base64.decodeBase64(imageDataString.getBytes()); 
    } 
    public String getBase64FMR() { 
     return base64FMR; 
    } 
    public String getBase64Image() { 
     return base64Image; 
    } 
}

私は、コードをコンパイルし、jarファイルに変換し、

D:\Thumb\build\classes\thumb>keytool -genkey -keystore myKeystore -alias myself 
Enter keystore password: 
Re-enter new password: 
What is your first and last name? 
    [Unknown]: Ravi 
What is the name of your organizational unit? 
    [Unknown]: abc 
What is the name of your organization? 
    [Unknown]: abc 
What is the name of your City or Locality? 
    [Unknown]: Lucknow 
What is the name of your State or Province? 
    [Unknown]: UP 
What is the two-letter country code for this unit? 
    [Unknown]: 91 
Is CN=Ravi Thapa, OU=NIC, O=NIC, L=Lucknow, ST=UP, C=91 correct? 
    [no]: yes 
Enter key password for <myself> 
     (RETURN if same as keystore password): 
Re-enter new password: 
D:\SECUGEN_DRIVERS\Thumb\build\classes\thumb>keytool -selfcert -alias myself -kystore myKeystore 
Illegal option: -kystore 
keytool -selfcert [OPTION]... 
Generates a self-signed certificate 
Options: 
-alias <alias>     alias name of the entry to process 
-sigalg <sigalg>    signature algorithm name 
-dname <dname>     distinguished name 
-startdate <startdate>   certificate validity start date/time 
-validity <valDays>    validity number of days 
-keypass <arg>     key password 
-storetype <storetype>   keystore type 
-keystore <keystore>   keystore name 
-storepass <arg>    keystore password 
-providername <providername> provider name 
-providerclass <providerclass> provider class name 
-providerarg <arg>    provider argument 
-providerpath <pathlist>  provider classpath 
-v        verbose output 
Use "keytool -help" for all available commands 
D:\SECUGEN_DRIVERS\Thumb\build\classes\thumb>keytool -list -keystore myKeystore 
Enter keystore password: 
Keystore type: JKS 
Keystore provider: SUN 
Your keystore contains 1 entry 
myself, Apr 15, 2014, PrivateKeyEntry, 
Certificate fingerprint (SHA1): 24:9C:50:D7:49:47:27:EB:87:9A:BA:89:F4:19:72:6A:02:AF:1B:3F 
D:\SECUGEN_DRIVERS\Thumb\build\classes\thumb>jarsigner -keystore myKeystore Thumb.jar myself 
Enter Passphrase for keystore: 
jar signed. 
Warning: 
The signer certificate will expire within six months. 
No -tsa or -tsacert is provided and this jar is not timestamped. Without a timestamp, users may not be able to validate this jar after the signer certificate's expiration date (2014-07-14) or after any future revocation date.

が

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> 
<%@ page import="java.io.File"%> 
<html> 
    <head> 
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></meta> 
     <meta http-equiv="cache-control" content="no-cache"/> 
     <script type="text/javascript"> 
     function getVarData(){ 
        var thumbImp = document.Applet1.getBase64FMR(); 
        var thumbImpImage = document.Applet1.getBase64Image(); 
        document.getElementById('varThumb').value = thumbImp; 
        document.getElementById('varThumbImage').value = thumbImpImage; 
     } 
     </script> 
    </head> 
    <body> 
     <table> 
      <tr> 
       <td> 
        <applet code="thumb.ThumbVerification" width="120" height="170" id="Applet1" name="AppletABC" 
          archive="<%=request.getContextPath()%>/Thumb.jar"></applet> 
       </td> 
      </tr> 
     </table> 
    </body> 
</html> 
SEND THE DATA USING HIDDEN FIELD 
<input type="submit" value=" SAVE " onclick="getVarData();"/> 

       <input type="hidden" id="varThumb" name="varThumb"/> 
       <input type="hidden" id="varThumbImage" name="varThumbImage"/>*

出典

2014-12-08 12:32:16

私はやったJSPファイルにjarファイルを入れて署名しましたあなたと同じ、良い答え:) –

答えて

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