5、Java安全机制解析

Java安全机制解析

1. Java默认沙箱权限与策略

在Java的默认沙箱环境中，权限设置对于保障系统安全至关重要。以下是部分权限设置代码示例：

// backward compatibility.
permission java.lang.RuntimePermission "stopThread";
// allows anyone to listen on unprivileged ports
permission java.net.SocketPermission "localhost:1024−", "listen";
// "standard" properies that can be read by anyone
permission java.util.PropertyPermission "java.version", "read";
permission java.util.PropertyPermission "java.vendor", "read";
permission java.util.PropertyPermission "java.vendor.url", "read";
permission java.util.PropertyPermission "java.class.version",
                                         "read";
permission java.util.PropertyPermission "os.name", "read";
permission java.util.PropertyPermission "os.versi