这里写自定义目录标题
java String 对象为空格时,长度不为0
通常判断null,空字符串或者空格方式如下:
if (emailAddr == null || emailAddr.length()==0 || emailAddr.equals("") || emailAddr.trim().isEmpty()) {
addressName = jointMailAddr(lastName,emplId);
}else {
addressName = psabEmplVo.getEmailAddr();
}