如何通过JNDI更改LDAP密码

Hashtable<String, String> env = new Hashtable<>();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://ldap.example.com:389");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=admin,dc=example,dc=com");
env.put(Context.SECURITY_CREDENTIALS, "adminPassword");

InitialContext ctx = new InitialContext(env);

String userDN = "uid=john,ou=users,dc=example,dc=com";
Attributes attrs = ctx.getAttributes(userDN);

ModificationItem[] mods = new ModificationItem[1];
mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE, new BasicAttribute("userPassword", "newPassword"));

ctx.modifyAttributes(userDN, mods);

ctx.close();