JDBC查询MySql只显示序号为偶数的记录的原因

这是一段JDBC查询数据库的例子，奇怪的是，执行下来，只能查询到序号为偶数的记录。例如：数据库中有两条符合要求的数据，只能查询到第二条，

有四条符合要求的数据，只能查询到第二条、第四条，依此类推。。

public ArrayList<Task> getPTask1(int userId) {
try {
ArrayList<Task> al = new ArrayList<Task>();
pstmt = (PreparedStatement) ct
.prepareStatement("select * from task where receiverID = ? and publisherID = ? and remark = 2");
pstmt.setInt(1, userId);
pstmt.setInt(2, userId);
ResultSet rs = (ResultSet) pstmt.executeQuery();

while (rs.next()) {
System.out.println(rs.next());
Task task = new Task();
task.setTaskId(rs.getInt(1));
task.setTopic(rs.getString(2));
task.setContent(rs.getString(3));
task.setAddition(rs.getBlob(4));
task.setUserByPublisherId(this.getUById(rs.getInt(5)));
task.setUserByReceiverId(this.getUById(rs.getInt(6)));
task.setDate(rs.getString(7));
task.setRemark(rs.getInt(8));
task.setLevel(rs.getString(9));
task.setAord(rs.getString(10));
task.setReason(rs.getString(11));
task.setDegree(rs.getString(12));
task.setAddName(rs.getString(13));
al.add(task);
System.out.println("task4Content:" + task.getContent());
}
return al;
} catch (Exception e) {
e.printStackTrace();
return null;
}

最后得知，原因是：

rs.next每执行一次，指针移动一行。所以，将System.out.println(rs.next());注释掉后，就会正常了。