批量insert
http://blog.csdn.net/xiaoxian8023/article/details/20155429
Mysql jdbc 批处理数据，需要给jdbc连接加上rewriteBatchedStatements=true。默认jdbc是不会开启批处理。
例如：jdbc:mysql://10.250.4.98:3306/dbname rewriteBatchedStatements=true
Java UpdateBatchSample：
官网forums
39,260053,263456#msg-263456
MySQL itself has no real "batch" API for prepared statements. If you add the configuration property "rewriteBatchedStatements=true" to your JDBC connection string for Connector/J, the driver will rewrite batches of prepared INSERTs into multi-value form, and all other forms of statements into multi-statements, which does give a large performance gain (7-10x).
注意：
jdbc driver 版本需要 5.1.8 及以上