### 事务提交
```aidl
Connection conn = null;
        try {
            conn = DbKit.getConfig().getDataSource().getConnection();
            DbKit.getConfig().setThreadLocalConnection(conn);
            // 自动提交表成fasle:手动提交
            conn.setAutoCommit(false);
            for (Record r1 : l2) {
                int id = r1.getInt("id");
                String step_code = r1.getStr("step_code");
                sql = "update t_gtzz_sy_laststep  set step_name=?,days_limit=? where id=?";
                Record r = _map.get(step_code);
                Db.update(sql, r.getStr("step_name"), r.getStr("days_limit"), id);
            }
            conn.commit();
        } catch (SQLException e) {
            try {
                if (null != conn) conn.rollback();
            } catch (SQLException e1) {
                e1.printStackTrace();
            }
            throw new ActiveRecordException(e);
        } finally {
            try {
                if (null != conn) conn.close();
            } catch (Exception e2) {
                e2.printStackTrace();
            } finally {
                DbKit.getConfig().removeThreadLocalConnection();
            }
        }
```

### Jfinal批量提交带参数的例子
```aidl
 //Jfinal批量提交带参数的例子
        sql = "update t_gtzz_sy_laststep  set step_name=?,days_limit=? where id=?";
        Object[][] para = new Object[l2.size()][3];
        int cnt = 0;
        for (Record r1 : l2) {
            int id = r1.getInt("id");
            String step_code = r1.getStr("step_code");
            Record r = _map.get(step_code);
            para[cnt][0] = r.getStr("step_name");
            para[cnt][1] = r.getStr("days_limit");
            para[cnt++][2] = id;
        }
        Db.batch(sql, para, 1000);
```

### 记录执行时间
```aidl

long startTime=System.currentTimeMillis();

...

long endTime=System.currentTimeMillis();
long total = endTime - startTime;
System.out.println("耗时时间" + total +"ms");
```