如何提交一個SQL查詢？

解決方法

下麵的示例使用connection.commit()方法來執行查詢。

import java.sql.*;

public class jdbcConn {
   public static void main(String[] args) throws Exception{
      Class.forName("org.apache.derby.jdbc.ClientDriver");
      Connection con = DriverManager.getConnection
      ("jdbc:derby://localhost:1527/testDb","name","pass");
      Statement stmt = con.createStatement();
      String query = "insert into emp values(2,'name1','job')";
      String query1 ="insert into emp values(5,'name2','job')";
      String query2 = "select * from emp";
      ResultSet rs = stmt.executeQuery(query2);
      int no_of_rows = 0;
      while (rs.next()) {
         no_of_rows++;
      }
      System.out.println("No. of rows before commit 
      statement = "+ no_of_rows);
      con.setAutoCommit(false);
      stmt.execute(query1);
      stmt.execute(query);
      con.commit();
      rs = stmt.executeQuery(query2);
      no_of_rows = 0;
      while (rs.next()) {
         no_of_rows++;
      }
      System.out.println("No. of rows after commit 
      statement = "+ no_of_rows);
   }
}      

結果

上麵的代碼示例將產生以下結果。該結果可能會不同。

No. of rows before commit statement = 1
No. of rows after commit statement = 3