我正在写一个批量电子邮件程序使用JavaMail应用程序接口。我有一个Microsoft Exhange服务器,我正在尝试将电子邮件发送到该服务器。当我运行我的程序时,我得到以下错误:
**com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2057)
at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:1862)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport
当读取类型为MySQL的BigInt列(例如,下面的BIGINT(21) UNSIGNED )时,火花不能在以下代码段中将java.math.BigDecimal转换为String:
val driver = "com.mysql.jdbc.Driver"
val server = ...
val infoSchema = "INFORMATION_SCHEMA"
val port = 3306
val user = ...
val pw = ...
val dbUrl = s"jdbc:mysql://$server:$port/$infoSchema
我有一个用于node.js的sqlite3 js控制器函数:
exports.findUser=function findUser(user){
var temp ;
var db = new sqlite3.Database('kitchen.db');
var stmt_user_find = "SELECT * FROM user WHERE un = ?";
db.all(stmt_user_find,user,save);
function save(err, rows) {
if (err) throw err;
console.lo