摘要：array开销小，长度初始化时必须就确定。list 长度可变，删除与增加很方便。array定义： String [] strs= new String[5];//strs=={"a","d","e","df","dfg"} 错误 或者 String [] strs={"a","d","e","df","dfg"} //注意{}整体赋值，只能用在初始化时list定义： List<Object& 阅读全文

摘要：apache common email组件需要mail.jar, commons-email-1.2.jarpackage utils;import org.apache.commons.mail.EmailAttachment;import org.apache.commons.mail.EmailException;import org.apache.commons.mail.HtmlEmail;import org.apache.commons.mail.MultiPartEmail;public class EmailUtil { public static void s... 阅读全文