ORA-01000:超出打开游标的最大数的原因和解决方案

import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; public class Test { public Connection getConnection() { String url = "jdbc:oracle:thin:@localhost:1521:ora9i"; String user = "scott"; String password = "tiger"; Connection con = null; try { Class.forName("oracle.jdbc.driver.OracleDriver").newInstance(); con = DriverManager.getConnection(url, user, password); } catch (Exception e) { e.printStackTrace(); } return con; } public static void main(String[] args) throws SQLException { long a = 13819100000L; long b = 13819100600L; // 问题点 Connection con = null; Statement stmt = null; Test insert = new Test(); try { con = insert.getConnection(); for (long c = a; c <= b; c++) { String sql = "insert into telepnum values(" + c + ")"; stmt = con.createStatement(); // 这里是问题的所在 stmt.executeUpdate(sql); } System.out.println("OK"); } catch (Exception e) { e.printStackTrace(); } finally { if (con != null) { con.close(); } } }

分析
在循环里面每次都
stmt=con.createStatement();
而没有释放，这样每个都占用了一个服务器的游标资源，最后造成失败

解决方案

1增加关闭语句

con = insert.getConnection(); for (long c = a; c <= b; c++) { String sql = "insert into telepnum values(" + c + ")"; stmt = con.createStatement(); // 这里是问题的所在 stmt.executeUpdate(sql); stmt.close(); // 用完了就关闭好了 }

2改装成批量更新

con = insert.getConnection(); con.setAutoCommit(false); stmt = con.createStatement(); // 移动到这里，Statemet是可以重用的 for (long c = a; c <= b; c++) { String sql = "insert into telepnum values(" + c + ")"; stmt.addBatch(sql); } stmt.executeBatch(); con.commit();