善用LDAP来做登陆验证（Java 中级）

首先关于是什么是LDAP，请参考 LADP_WIKI

Java 给我们已经提供了Ldap 登陆的API，所以我们就基于Java原生的LDAP 接口进行。

首先，我们需要定义准备LDAP 相关的常量

public static final String SECURITY_AUTHURICATION = "securityAuthurication";
public static final String LDAP_CONTEXT_FACTORY = "com.sun.jndi.ldap.LdapCtxFactory";
public static final String SECTION = "login";
public static final String SERVER = "server";
public static final String AMDIN_NAME = "username";
public static final String ADMIN_PWD = "password";
public static final String ACCOUNT_BASE = "accountBase";
public static final String REFERRAL = "referral";
public static final String SEARCH_SCOPE = "searchScope";
public static final String SEARCH_PATTERN = "searchPattern";
public static final String VALUES_SPLITOR = ",";
public static final String SECURITY_AUTHURICATION = "securityAuthurication";
public static final String LDAP_CONTEXT_FACTORY = "com.sun.jndi.ldap.LdapCtxFactory";

Hashtable<String, String> env = new Hashtable<String, String>();
// 定义查询属性：

env.put(Context.INITIAL_CONTEXT_FACTORY, LDAP_CONTEXT_FACTORY);
env.put(Context.PROVIDER_URL, server);
env.put(Context.REFERRAL, referral);
env.put(Context.SECURITY_AUTHENTICATION, securityAuthurication);
env.put(Context.SECURITY_PRINCIPAL, adminName);
env.put(Context.SECURITY_CREDENTIALS, adminPwd);