JAVA Applet java.policy异常导致无法访问

1.在html中载入java applet时报异常policy...

可以在浏览器使用的jvm的jre（D:\Program Files\Java\jre6\lib\security\java.policy） 下添加如下内容：

permission java.security.AllPermission;

 //Add  SocketPermissions for each host that applets can connect to.
        //Use "*" to allow applets to connect to any host.
        permission java.net.SocketPermission "HOSTNAME1","connect,resolve";
        permission java.net.SocketPermission "mydomain.com","connect,resolve";
        permission java.net.SocketPermission "HOSTNAME3","connect,resolve";

 //Windows based systems use this line
        permission java.io.FilePermission "${java.home}\\lib\\security\\cacerts","read";
        //UNIX users comment out the previous line and uncomment the following
        permission java.io.FilePermission "${java.home}/lib/security/cacerts","read";

 //Shouldn't need to change anything below here.
 permission java.util.PropertyPermission "TN5250J_SSL_TYPE", "read,write";
 permission java.util.PropertyPermission "java.home","read";
    permission java.util.PropertyPermission "user.dir","read";
 permission java.util.PropertyPermission "file.seperator","read";
    // change the following to "read,write" if you want the user to be able to save
    permission java.io.FilePermission "TN5250JDefaults.props", "read";
 permission java.io.FilePermission "keymap","read,write";
 permission java.io.FilePermission "macros","read,write";
 permission java.io.FilePermission "scripts","read";