![]() |
The Java Developers Almanac 1.4Order this book from Amazon. |
e222. Protecting System PropertiesAccess to system properties (System.getProperty() ) is controlled
with a policy file (see e220 Managing Policy Files). Here are
examples of policy file entries for controlling access to system
properties.
// grant all classes loaded from h1.com ability to read the `myprop' system properties grant codeBase "http://h1.com/-" { permission java.util.PropertyPermission "myprop", "read"; }; // grant ability to write the `myprop' system properties grant codeBase "http://h2.com/-" { permission java.util.PropertyPermission "myprop", "write"; }; // grant ability to read and write the `myprop' system properties grant codeBase "http://h3.com/-" { permission java.util.PropertyPermission "myprop", "read,write"; }; // grant ability to read all properties that start with `myprops.' grant codeBase "http://h4.com/-" { permission java.util.PropertyPermission "myprops.*", "read"; }; // grant ability to read all system properties grant codeBase "http://h5.com/-" { permission java.util.PropertyPermission "*", "read"; }; // grant ability to write all system properties grant codeBase "http://h6.com/-" { permission java.util.PropertyPermission "*", "write"; }; // grant ability to read and write all system properties grant codeBase "http://h7.com/-" { permission java.util.PropertyPermission "*", "read,write"; };
e220. Managing Policy Files e221. Protecting Files
© 2002 Addison-Wesley. |