java ldap查询同名用户 代码

以下是Java中使用LDAP查询同名用户的代码示例：

import javax.naming.*;
import javax.naming.directory.*;

public class LDAPSearch {
    public static void main(String[] args) {
        String searchFilter = "(&(objectClass=user)(cn=John Smith))"; // LDAP搜索过滤器
        String[] requiredAttributes = {"cn", "mail", "telephoneNumber"}; // 查询返回的属性
        
        // LDAP连接参数
        String ldapUrl = "ldap://ldap.example.com:389";
        String ldapBaseDn = "dc=example,dc=com";
        String ldapUsername = "cn=admin,dc=example,dc=com";
        String ldapPassword = "adminpassword";
        
        // 创建LDAP连接
        Hashtable<String, String> env = new Hashtable<>();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, ldapUrl);
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
        env.put(Context.SECURITY_PRINCIPAL, ldapUsername);
        env.put(Context.SECURITY_CREDENTIALS, ldapPassword);
        
        try {
            // 连接LDAP服务器
            DirContext ctx = new InitialDirContext(env);
            
            // 执行搜索
            NamingEnumeration<SearchResult> results = ctx.search(ldapBaseDn, searchFilter, getSimpleSearchControls(requiredAttributes));
            
            // 处理搜索结果
            while (results.hasMore()) {
                SearchResult result = (SearchResult) results.next();
                Attributes attrs = result.getAttributes();
                Attribute attr = attrs.get("cn");
                String cn = (String) attr.get();
                attr = attrs.get("mail");
                String mail = (String) attr.get();
                attr = attrs.get("telephoneNumber");
                String telephoneNumber = (String) attr.get();
                System.out.println("cn: " + cn + ", mail: " + mail + ", telephoneNumber: " + telephoneNumber);
            }
            
            // 关闭LDAP连接
            ctx.close();
        } catch (NamingException e) {
            e.printStackTrace();
        }
    }
    
    // 获取LDAP搜索控制器
    private static SearchControls getSimpleSearchControls(String[] attributes) {
        SearchControls controls = new SearchControls();
        controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
        controls.setTimeLimit(30000);
        controls.setReturningAttributes(attributes);
        return controls;
    }
}

请注意，你需要替换代码中的LDAP连接参数和搜索过滤器，以适应你的LDAP服务器和搜索需求。