我在表中有很多行,我在我的数据库上运行相同的查询,即MySql,但java ResultSet只给出表的第一行.这是我的代码.
public ArrayList<String> getAllAlbumsName(Integer uid) {
ArrayList<String>allAlbumsName = new ArrayList<String>();
try {
String qstring = "SELECT albumname FROM picvik_picture_album WHERE " +
"uid = '" + uid + "';";
System.out.println(qstring);
connection = com.picvik.util.MysqLConnection.getInstance().getConnection();
ptmt = connection.prepareStatement(qstring);
resultSet = ptmt.executeQuery();
if(resultSet.next()) {
System.out.println(resultSet.getString("albumname"));
allAlbumsName.add(resultSet.getString("albumname"));
}
resultSet.close();
ptmt.close();
connection.close();
} catch (Exception e) {
e.printstacktrace();
}
return allAlbumsName;
}
解决方法:
if(resultSet.next()) {
System.out.println(resultSet.getString("albumname"));
allAlbumsName.add(resultSet.getString("albumname"));
}
如果你想获得所有行,它应该是:
while(resultSet.next()) {
System.out.println(resultSet.getString("albumname"));
allAlbumsName.add(resultSet.getString("albumname"));
}
注意:正如@BalusC评论的那样,你的代码会引入sql注入攻击,最好使用ptmt.set …而不是手动构建sql String.