jdbc实现批量提交rollback

最近上了一个老项目，要修改一些业务，具体的思路是在jsp中实现对数据的某些批量操作，因此做一下笔记。

1.整体jdbc建立连接/关闭连接

            conn = DbUtil.getConnection();
            statement = conn.createStatement();
            resultSet = null;
            //保存当前提交状态
            boolean autoCommit = conn.getAutoCommit();
            //关闭自动提交
            conn.setAutoCommit(false);
            String updateMANUALSql = "*****";
            statement.addBatch(updateMANUALSql);
            try {
                statement.executeBatch();
                conn.commit();
            } catch (Exception e) {
                e.printStackTrace();
                conn.rollback();
            } finally {
                //重置
                conn.setAutoCommit(autoCommit);
                //清除批处理命令
                statement.clearBatch();
            }
            //关闭resultSet
            if (resultSet != null) {
                try {
                    resultSet.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
                resultSet = null;
            }
            //关闭statement
            statement.clearBatch();
            if (statement != null) {
                try {
                    statement.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
                statement = null;
            }
            //关闭数据库连接
            if (conn != null) {
                try {
                    conn.close();
                } catch (SQLException ex) {
                    ex.printStackTrace();
                }
                conn = null;
            }

2.批量插入更改删除数据优化

    String sql = "insert into arp_standard(guid, devicebrand, devicename, deviceip, ipaddress, " +
                     "macaddress, createtime) values(?,?,?,?,?,?,?)";
        try{
            conn = DBConnection.getConnection();
            ps = conn.prepareStatement(sql);

    //保存当前提交状态
    boolean autoCommit = conn.getAutoCommit();
    //关闭自动提交
    conn.setAutoCommit(false);

            int len = list.size();
            for(int i=0; i<len; i++) {
                ps.setString(1, list.get(i).getGuid());
                ps.setString(2, list.get(i).getDeviceBrand());
                ps.setString(3, list.get(i).getDeviceName());
                ps.setString(4, list.get(i).getDeviceIp());
                ps.setString(5, list.get(i).getIpAddress());
                ps.setString(6, list.get(i).getMacAddress());
                ps.setString(7, list.get(i).getCreateTime());

                //插入代码打包，等一定量后再插入
                ps.addBatch();
                //每200次提交一次
                if((i!=0 && i%200==0) || i==len-1){//可以设置不同的大小；如50，100，200，500，1000等等
                    ps.executeBatch();
                    //提交，批量插入数据库中。
                    conn.commit();
                    ps.clearBatch();
                }
            }