我正在尝试更新 ResultSet 中的一行,但它抛出了一个错误。我将常量值传递ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE
给 createStatement。
这是我的代码:
public void modifyPrice(float percentage) throws SQLException {
try {
con = util.connectdb();
con.setAutoCommit(false);
st = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE);
ResultSet rs = st.executeQuery("select * from " + util.dbName
+ ".COFFEES");
while (rs.next()) {
float f = rs.getFloat("PRICE");
rs.updateFloat("PRICE", f * percentage);
rs.updateRow();
}
} catch (SQLException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} finally {
if (st != null) {
st.close();
con.close();
}
}
}
当我执行这个代码块时,下面的堆栈被打印在控制台上。
java.sql.SQLException: Invalid operation for read only resultset: updateFloat
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:131)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:197)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:261)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:269)
at oracle.jdbc.driver.BaseResultSet.updateFloat(BaseResultSet.java:236)
at oracle.jdbc.driver.OracleResultSet.updateFloat(OracleResultSet.java:677)
at tutorial.ModifyResultSet.modifyPrice(ModifyResultSet.java:29)
at tutorial.ModifyResultSet.main(ModifyResultSet.java:15)
谁能帮我解决这个错误?