Illegal operation on empty result set
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数据库操作的错误信息:Illegal operation on empty result set.
错误原因分析:
Statement stmt = conn.createStatement();
ResultSet rs=stmt.executeQuery("select * from register where name='cai'");
while(rs.next()){ //这里必须循环遍历
String passwd = rs.getString("psw");//返回一条记录
System.out.println(passwd );
}
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