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CREATE TABLE `link` (
  `id` int(11) NOT NULL auto_increment,
  `url` varchar(255) default NULL,
  `title` varchar(255) default NULL,
  `creep` int(11) default NULL,
  `crawl` int(11) default NULL,
  `time` datetime default NULL,
  PRIMARY KEY  (`id`),
  UNIQUE KEY `url` (`url`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

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  ...
  Statement stmt = conn.createStatement(); 
  String sql1 = "INSERT INTO `link` (`url`,`title`,`creep`)VALUES ('1www.510baby.com', '510baby', '0')";
  stmt.execute(sql1);
  String sql2 = "INSERT INTO `link` (`url`,`title`,`creep`)VALUES ('2www.510baby.com', '510baby', '0')";
  stmt.execute(sql2);
  stmt.close();
  ...
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  ...
  Statement stmt = conn.createStatement(); 
  String sql3 = "INSERT INTO `link` (`url`,`title`,`creep`)VALUES ('3www.510baby.com', '510baby', '0')";
  stmt.execute(sql1);
  String sql4 = "INSERT INTO `link` (


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