Type Project 'generatorSqlmapCustom' is missing required library: 'lib/mysql-connector-java-5.1.28-b

使用generatorSqlmapCustom对数据库进行****，生成接口和xml，还有实体时出错：

Project 'generatorSqlmapCustom' is missing required library:' 'lib/mysql-connector-java-5.1.28-bin.jar

表示当前工程lib目录下的mysql-connector-java-5.1.28-bin.jar包缺失，重新下载一个新的mysql的jar包放入lib目录下，build path该jar包，然后再对项目右击Properties->Java Build Path->Libraries->add External JARs,删除失效的mysqljar包路径即可。