JAVA高级面试进阶训练营视频教程

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进行批量更新的时候发现：

addBatch(sql);

executeBatch 抛出异常后,剩余的sql没有更新，即出现异常之前的都入库了，异常之后即使有可执行sql都不会执行。

百度资料后了解：这是DBMS数据库管理系统控制的，有的DBMS在异常之后，剩下的sql也会执行，有的DBMS异常之后其余的不入库。

我的改进方法如下：public static boolean bachInsertData(List<String> sqlList) {  boolean bool = false;  Connection conn = null;

public static boolean bachInsertData(List<String> sqlList) {
        boolean bool = false;
        Connection conn = null;
        Statement stm = null;
        try {
            conn = MyDAO.getConnection();
            conn.setAutoCommit(false);
            stm = conn.createStatement();
            for (String sql : sqlList) {
                stm.addBatch(sql);
            }
            stm.executeBatch();
            conn.commit();
            bool = true;
        } catch (Exception e) {
            if(e instanceof BatchUpdateException){
                BatchUpdateException bException = (BatchUpdateException)e;
                int[] s = bException.getUpdateCounts();
                logger.info("更新失败数据:"+sqlList.get(s.length));
                if(s.length+1<sqlList.size()){                    
                    List<String> sList = sqlList.subList(s.length+1, sqlList.size());                    
                    bachInsertData(sList);
                }
            }else{
                e.printStackTrace();
                try {
                    if (stm != null)
                        stm.close();
                } catch (SQLException ex) {
                    ex.printStackTrace();
                }
                try {
                    conn.close();
                } catch (SQLException ex) {
                    ex.printStackTrace();
                }
            }            
        } finally {
            try {
                if (stm != null)
                    stm.close();
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
            try {
                conn.close();
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
        }
        return bool;
    }

 

　　以前不知道哇啊啊啊啊，好多得改！！！