umbrella
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于 2004-03-06 18:16
因需要基于WEB的MAIL发送程序(其实就是取回密码时发送密码),在网上看到一段MAIL程序,现在将其修改为WEB界面SERVLET处理并提交数据库寻找用户名的以发送回密码。大家可研究交流下。另外使用的时候建个表单,把用户名提交到getpost就可以了。
有三个类,一个是数据库类(dbconn.java),一个是MAIL发送类(mymail.java),还有一个是
SERVLET取得表单用户名及一些返回给用户的信息(getpost.java)。
调试此程序需要下载JAVAMAIL包与JAF包。可到SUN公司去下载。
dbconn.java类:
package webmail; import javax.sql.*; import java.sql.*;
/** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright 2004</p> * <p>Company: </p> * @author unascribed * @version 1.0 */
public class dbconn {
String username;//数据库帐号
String password;//数据库密码
String drivername;//驱动名称
String url;//数据库地址
Connection conn;//连接对象
public dbconn()
{
}
public Connection getconn() throws SQLException,Exception
{
username="root";
password="";
drivername="org.gjt.mm.mysql.Driver";
url="jdbc:mysql://localhost/news";
Class.forName( drivername ).newInstance();
conn=DriverManager.getConnection(url,username,password);
return conn;
}
}
getpost.java类:
package webmail; import javax.servlet.*; import javax.servlet.http.*; import javax.sql.*; import java.sql.*; import java.util.*; import java.io.*; /** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright 2004</p> * <p>Company: </p> * @author unascribed * @version 1.0 */
public class getpost extends HttpServlet{
String username="";//用户名
String pass=null;//用户密码
Connection conn=null;//连接对象
ResultSet rs=null;//结果集
String mail=null;//用户MAIL地址
public getpost()
{
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException
{
PrintWriter out=response.getWriter();
this.username=(String)request.getParameter("username");
System.out.println("取得用户名");
try
{
Check(username);
}
catch(Exception e)
{
System.out.println("连接出错!");
}
if(pass!=null)
{
System.out.println("准备建立MAIL对象");
mymail themail = new mymail();
themail.setNeedAuth(true);//设置是否需要MAIL帐号与密码验证
themail.setSubject("你的密码");
themail.setBody("你的用户名是:"+this.username+" 你的密码是:"+this.pass);
themail.setTo(this.mail);
themail.setFrom("crhwan@21cn.com");
themail.setNamePass("username","password");//在此输入你的MAIL帐号与密码
if(themail.sendout() == false)
{
return;
}
String ok=new String("发送成功,密码已发送到你注册时的MAIL信箱地址,请查收!".getBytes("GBK"),"ISO-8859-1");
out.println("<script language='javascript'>alert('"+ok+"');history.back();</script>");
}
else
{
System.out.println("对不起,发送失败!");
String no=new String("对不起,没有找到你的用户名!".getBytes("GBK"),"ISO-8859-1");
out.println("<script language='javascript'>alert('"+no+"');history.back();</script>");
return;
}
}
public void Check(String username) throws Exception,SQLException
{
try
{
dbconn get=new dbconn();
conn=get.getconn();
String name=username;
Statement query=conn.createStatement();
String sql="select * from userlist where username='"+name+"'";
rs=query.executeQuery(sql);
System.out.println("准备取得密码");
if(!rs.next())
{
System.out.println("对不起,没有找到你的用户名!");
this.pass=null;
return;
}
else
{
this.mail=rs.getString("f_email");
this.pass=rs.getString("password");
}
}
catch(Exception e)
{
System.out.println("数据出错!");
}
}
}
mymail.java类:
package webmail; import java.util.*; import javax.mail.*; import javax.mail.internet.*; import java.util.Date; import javax.activation.*; import java.io.*; public class mymail {
private MimeMessage mimeMsg; //MIME邮件对象
private Session session; //邮件会话对象 private Properties props; //系统属性 private boolean needAuth = false; //smtp是否需要认证
private String username = ""; //smtp认证用户名和密码 private String password = "";
private Multipart mp; //Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象
/** * */ public mymail() { setSmtpHost("smtp.21cn.com");//SMTP服务器 createMimeMessage(); }
public mymail(String smtp){ setSmtpHost(smtp); createMimeMessage(); }
/** * @param hostName String */ public void setSmtpHost(String hostName) { System.out.println("设置系统属性:mail.smtp.host = "+hostName); if(props == null)props = System.getProperties(); //获得系统属性对象
props.put("mail.smtp.host",hostName); //设置SMTP主机 }
/** * @return boolean */ public boolean createMimeMessage() { try{ System.out.println("准备获取邮件会话对象!"); session = Session.getDefaultInstance(props,null); //获得邮件会话对象 } catch(Exception e){ System.err.println("获取邮件会话对象时发生错误!"+e); return false; }
System.out.println("准备创建MIME邮件对象!"); try{ mimeMsg = new MimeMessage(session); //创建MIME邮件对象 mp = new MimeMultipart();
return true; } catch(Exception e){ System.err.println("创建MIME邮件对象失败!"+e); return false; } }
/** * @param need boolean */ public void setNeedAuth(boolean need) { System.out.println("设置smtp身份认证:mail.smtp.auth = "+need); if(props == null)props = System.getProperties();
if(need){ props.put("mail.smtp.auth","true"); }else{ props.put("mail.smtp.auth","false"); } }
/** * @param name String * @param pass String */ public void setNamePass(String name,String pass) { username = name; password = pass; }
/** * @param mailSubject String * @return boolean */ public boolean setSubject(String mailSubject) { System.out.println("设置邮件主题!"); try{ mimeMsg.setSubject(mailSubject); return true; } catch(Exception e) { System.err.println("设置邮件主题发生错误!"); return false; } }
/** * @param mailBody String */ public boolean setBody(String mailBody) { try{ BodyPart bp = new MimeBodyPart(); bp.setContent("<meta http-equiv=Content-Type content=text/html; charset=??????>"+mailBody,"text/html;charset=??????"); mp.addBodyPart(bp);
return true; } catch(Exception e){ System.err.println("设置邮件正文时发生错误!"+e); return false; } }
/** * @param name String * @param pass String */ public boolean addFileAffix(String filename) {
System.out.println("增加邮件附件:"+filename);
try{ BodyPart bp = new MimeBodyPart(); FileDataSource fileds = new FileDataSource(filename); bp.setDataHandler(new DataHandler(fileds)); bp.setFileName(fileds.getName());
mp.addBodyPart(bp);
return true; } catch(Exception e){ System.err.println("增加邮件附件:"+filename+"发生错误!"+e); return false; } }
/** * @param name String * @param pass String */ public boolean setFrom(String from) { System.out.println("设置发信人!"); try{ mimeMsg.setFrom(new InternetAddress(from)); //设置发信人 return true; } catch(Exception e) { return false; } }
/** * @param name String * @param pass String */ public boolean setTo(String to){ if(to == null)return false;
try{ mimeMsg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to)); return true; } catch(Exception e) { return false; }
}
/** * @param name String * @param pass String */ public boolean setCopyTo(String copyto) { if(copyto == null)return false; try{ mimeMsg.setRecipients(Message.RecipientType.CC,(Address[])InternetAddress.parse(copyto)); return true; } catch(Exception e) { return false; } }
/** * @param name String * @param pass String */ public boolean sendout() { try{ mimeMsg.setContent(mp); mimeMsg.saveChanges(); System.out.println("正在发送邮件....");
Session mailSession = Session.getInstance(props,null); Transport transport = mailSession.getTransport("smtp"); transport.connect((String)props.get("mail.smtp.host"),username,password); transport.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.TO)); //transport.send(mimeMsg);
System.out.println("发送邮件成功!"); transport.close();
return true; } catch(Exception e) { System.err.println("邮件发送失败!"+e); return false; } }
}
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