当我认为胜利在望的时候，发现resin好像不支持grant codeBase "file:xxxx 。

grant codeBase "file:/data/ftpdata/user01.test.com/-" {
 permission java.io.FilePermission "/data/ftpdata/user01.test.com/-", "read,write,delete";
};
     上面的语句，语法上没有问题，但就是不起作用。那个codebase目录下的文件，对本目录没有任何权限。

        resin的官方论坛里面，有人在2001年，针对resin1.2.5就提出了和我一摸一样的疑问（http://www.caucho.com/support/resin-interest/0105/0106.html），作者发现问题是由于resin的classloader是非安全的，因此改了resin原文件后解决了问题（http://www.caucho.com/support/resin-interest/0105/0112.html），但是我看resin3的源代码，里面已经基于java.security.SecureClassLoader，因此应该不是这个原因了。
     以下是我的resin.policy文件：

grant codeBase "file:${java.home}/lib/-" {
 permission java.security.AllPermission;
};

grant codeBase "file:${java.home}/jre/lib/-" {
 permission java.security.AllPermission;
};

grant codeBase "file:${resin.home}/lib/-" {
 permission java.security.AllPermission;
};

grant {
 permission java.util.PropertyPermission "*", "read";
 permission java.io.SerializablePermission "enableSubstitution";
 permission java.lang.reflect.ReflectPermission "suppressAccessChecks"; 
 permission java.lang.RuntimePermission "accessClassInPackage.*";
 permission java.lang.RuntimePermission "getClassLoader";
 permission java.lang.RuntimePermission "accessDeclaredMembers";
 permission java.lang.RuntimePermission "modifyThreadGroup";
 permission java.lang.RuntimePermission "setContextClassLoader";
 permission java.lang.RuntimePermission "setIO";
 permission java.lang.RuntimePermission "stopThread";
 permission java.lang.RuntimePermission "createClassLoader";
 permission java.lang.RuntimePermission "getProtectionDomain";
 permission java.lang.RuntimePermission "defineClassInPackage";
 permission java.security.SecurityPermission "putProviderProperty.SunJCE";
 permission java.security.SecurityPermission "insertProvider.SunJCE";
 permission java.util.logging.LoggingPermission "control";
 permission java.lang.RuntimePermission "getAttribute";
 permission java.util.PropertyPermission "jaxp.debug", "read";
 permission ognl.OgnlInvokePermission "invoke.*";
 permission java.net.SocketPermission "localhost:3306","connect";
 permission java.io.FilePermission "${resin.home}/-", "read";
 permission java.io.FilePermission "${java.home}/-", "read";
 permission java.io.FilePermission "/tmp/-","read,write,delete";
 permission java.io.FilePermission "/tmp","read,write,delete";
 permission java.io.FilePermission ".","read";
 permission java.io.FilePermission "/home/apps/java/jdk/lib/tools.jar","read";
 permission java.io.FilePermission "/bin/sh", "read,execute";
};

//以下语句没有任何作用，/data/ftpdata/user01.test.com/下的jsp对这个目录没有读的权限
grant codeBase "file:/data/ftpdata/user01.test.com/-" {
 permission java.io.FilePermission "/data/ftpdata/user01.test.com/-", "read,write,delete";
};