你好,我有一个问题我想改变光标位置第一行,但我不知道为什么我的代码不working.when我添加rs2.first():Java JDBC ResultSet中的First()不起作用?
而且我gettign这个错误:
只能在可滚动的ResultSet对象上调用此方法(键入TYPE_SCROLL_INSENSITIVE)。
try{
String driver = "org.apache.derby.jdbc.ClientDriver";
Class.forName(driver).newInstance();
String url = "jdbc:derby://localhost:1527/test";
Connection conn = DriverManager.getConnection(url);
String query = "select * from APP.RANKING";
Statement stmt = conn.createStatement();
Statement stmt2 = conn.createStatement();
ResultSet rs = stmt.executeQuery(query);
ResultSet rs2 = stmt2.executeQuery(query);
while (rs.next()){
String BID = rs.getString("BALLOT_ID");
String CN = rs.getString("CANDIDATE_NAME");
String ROID = rs.getString("USER_ID");
Ro1_ID = ROID;
String RA = rs.getString("RANK");
int rowNum = rs.getRow();
int rowNum2;
boolean In_check = false;
while(rs2.next()){
In_ballot.addElement(BID);
}
rs2.First();
In_ballot.addElement(BID);
}
}
catch(Throwable e) {
System.err.println(e.getMessage());
}
this.InB_list.setModel(In_ballot);
感谢
rs2.beforeFirst()将光标移到第一行之前,而不是第一行。我没有看到rs2.first();在你的代码 – gorn 2012-03-25 01:54:34
对不起,我修改了我的code.al我也加了错误我得到 – user1290721 2012-03-25 01:56:22