降低mysql事务隔离级别

　　测试代码的时候实验了下降低事物隔离级别：

            Connection conn = null;
            try {
                conn = DBUtils.getConnection();
                conn.setAutoCommit(false);
                conn.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
　　　　　　　　............

　　然而，报错了

java.sql.SQLException: Cannot execute statement: impossible to write to binary log since BINLOG_FORMAT = STATEMENT and at least one table uses a storage engine 
limited to row-based logging. InnoDB is limited to row-logging when transaction isolation level is READ COMMITTED or READ UNCOMMITTED.

　　于是看了下BINLOG_FORMAT ： 

　　

　　于是：

　　

　　

　　这样就可以了，或者据说换MIXED模式也可以，不过没测试。