【实践】jdbc批量插入数据

 1 /*测试批量写入数据*/
 2         long start = System.currentTimeMillis();
 3         DaoRecord daoRecord = new DaoRecord();
 4         List<T> list = new ArrayList<T>();
 5         for(int i = 1; i <= 1000; i++){
 6             for(int j = 1; j <= 1000; j++){
 7                 T t = new T();
 8                 t.setI(i);
 9                 t.setJ(j);
10                 list.add(t);
11             }
12         }
13         daoRecord.InsertBatch(list);
14         System.out.println("耗时：" + (System.currentTimeMillis()-start)+"毫秒");

 1 //批量写入数据测试
 2     public void InsertBatch(List<T> list){
 3         String sql = "insert into t(go,back) values(?,?)";
 4         DBHelper dbh = new DBHelper(sql);
 5         Connection conn = dbh.returnConn();
 6         try {
 7             conn.setAutoCommit(false);//注意此句一定要为false，原因见第一篇参考文献
 8             PreparedStatement ps = conn.prepareStatement(sql);
 9             for(int i = 0; i < list.size(); i++){
10                 ps.setInt(1, list.get(i).getI());
11                 ps.setInt(2, list.get(i).getJ());
12                 ps.addBatch();
13                 if (i % 10000 == 0){
14                      ps.executeBatch();
15                      conn.commit();
16                  }
17             }
18             ps.executeBatch();
19             conn.commit();
20             conn.close();
21         } catch (SQLException e) {
22             // TODO 自动生成的 catch 块
23             e.printStackTrace();
24         }
25     }