如何使用 jndi 显示 ldap 目录的所有对象类描述

问题描述

我想显示 LDAP 目录架构中存在的所有对象类，以帮助用户输入可用的对象类以添加新条目.

I want to show all objectclasses present in schema of LDAP Directory to help user to input available objectclasses for adding new entry.

DirContext schema = ctx.getSchema("");
Attributes answer = schema.getAttributes("ClassDefinition/person");

但这仅显示有关人员的信息.

but that shows information about person only.

推荐答案

你要查询subschema subentry 即cn=schema(以下代码已针对 Apache Directory Server 进行了测试)

You have to query the subschema subentry i.e cn=schema (the below code has been tested against the Apache Directory Server)

DirContext ctx = new InitialLdapContext( env, null );

SearchControls searchControls = new SearchControls();
searchControls.setSearchScope( SearchControls.OBJECT_SCOPE );
searchControls.setReturningAttributes( new String[]
    { "objectClasses" } );
NamingEnumeration<SearchResult> results = ctx.search( "cn=schema", "(ObjectClass=*)", searchControls );

SearchResult result = results.next();
Attributes entry = result.getAttributes();

Attribute objectClasses = entry.get( "objectClasses" );
System.out.println( objectClasses );