LDAP之二：Java 对 LDAP数据库的访问（转载）

package com.geong.cscb.eai;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
import javax.naming.ldap.InitialLdapContext;
import javax.naming.ldap.LdapContext;



public class LDAP{
public static void main(String[] args){

    System.out.println(getPassword("[e-mail]"));
    }
    
    
public static String getPassword(String user){
String password="";   
Attribute pass=null;
String domain=user.split("@")[1];
//System.out.println(domain);
String tmp[]=domain.split("\\.");
StringBuffer dn1=new StringBuffer(""); //通过用户名，解析根后缀.

for(int i=0;i<tmp.length;i++) 
   { if (i!=0) dn1.append(",");
       dn1=dn1.append("dc="+tmp[i]);
     }    
String dn=dn1.toString();

     
try{    
    Hashtable env = new Hashtable();
    env.put(Context.PROVIDER_URL,"ldap://192.168.1.50:389");
    env.put(Context.SECURITY_AUTHENTICATION, "simple");
    env.put(Context.SECURITY_PRINCIPAL, "cn=root"); //用户名
    env.put(Context.SECURITY_CREDENTIALS, "111"); //密码
    env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
    LdapContext ctx = new InitialLdapContext(env, null);
     SearchControls constraints = new SearchControls();
    constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
    NamingEnumeration results = ctx.search(dn,"(mail="+user+")",constraints); 
            
while (results != null && results.hasMore()){
SearchResult sr = (SearchResult) results.next();
Attributes attributes = sr.getAttributes();
     pass = attributes.get("Password");
}
}catch(Exception e){
    e.getStackTrace();
    }
password=pass.toString();
return password;     
}

}