java怎么连接exchange收发邮件

/**
serverName 接收邮件地址
user 用户信息
pwd 密码
path 邮件临时储存路径
max 每次接收邮件的最大数量
**/
public int receive(String serverName, String user, String pwd, String path, int max) throws Exception {
        //新建ExchangeVersion.Exchange2007_SP1版本的Exchange服务
    ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
    String[] userInfo = user.split("/");
    //用户认证信息
        ExchangeCredentials credentials = new WebCredentials(userInfo[1], pwd,userInfo[0]);
        service.setCredentials(credentials);
        //设置Exchange连接的服务器地址
        service.setUrl(new URI(serverName));
        //绑定邮箱
        Folder inbox = Folder.bind(service, WellKnownFolderName.Inbox);
        //获取邮箱文件数量
        int count = inbox.getTotalCount();
        if(max > 0) count = count > max ? max : count; 
        //循环获取邮箱邮件
        ItemView view = new ItemView(count);
        FindItemsResults<Item> findResults = service.findItems(inbox.getId(), view);
        for (Item item : findResults.getItems()) {
            EmailMessage message = EmailMessage.bind(service, item.getId());
            List<Attachment> attachs = message.getAttachments().getItems();
            try{
                if(message.getHasAttachments()){
                    for(Attachment f : attachs){
                        if(f instanceof FileAttachment){
                                //接收邮件到临时目录
                            File tempZip = new File(path,f.getName());
                            ((FileAttachment)f).load(tempZip.getPath());
                        }
                    }
                    //删除邮件
                    message.delete(DeleteMode.HardDelete);
                }
            }catch(Exception err){
                log.equals(err);
            }
        }
        return count;
    }