我一直在尝试在Cpp服务器和Java applet客户端之间建立连接,但是当我运行applet时,我在浏览器中收到此错误。我在信任存储文件中有证书(如果我不需要,请告诉我)。任何帮助将不胜感激。
访问被拒绝(“java.util.propertypermission” “javax.net.ssl.truststore”“写”)
import java.awt.*;
import java.applet.*;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import java.io.*;
import javax.swing.*;
public class no2 extends Applet {
int width, height;
public void init() {
System.setProperty("javax.net.ssl.trustStore", "keystore.jks");
System.setProperty("javax.net.ssl.trustStorePassword", "changeit");
String trustStore = System.getProperty("javax.net.ssl.trustStore");
if (trustStore == null) {
System.out.println("javax.net.ssl.trustStore is not defined");
} else {
System.out.println("javax.net.ssl.trustStore = " + trustStore);
}
try {
PrintWriter toServer = null;
BufferedReader fromServer = null;
SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket sslsocket = (SSLSocket) sslsocketfactory.createSocket("192.168.0.10", 12120);
String[] newProtocols = {"TLSv1"};
sslsocket.setEnabledProtocols(newProtocols);
toServer = new PrintWriter(sslsocket.getOutputStream(), true);
toServer.println("Data1\n");
toServer.println("Data2\n");
InputStreamReader isr = new InputStreamReader(sslsocket.getInputStream());
fromServer = new BufferedReader(isr, 1);
} catch (Exception exception) {
exception.printStackTrace();
}
}
}
答案 0 :(得分:1)
您无法在Applet中设置系统属性。您也无法访问本地文件(keystore.jks)系统(除非您请求获得特定权限)。
您可以像documentation中所述将特殊参数传递给JVM,如下所示:
<APPLET archive="my_applet.jar" code="MyApplet" width="300" height="300">
<PARAM name="java_arguments" value="-Djavax.net.ssl.trustStore=keystore.jks">
</APPLET>
但是,请再次注意访问本地文件所需的特殊权限。