java 批量删除多张表数据

public String deleteMore(String... a) {// TODO Auto-generated method stubString return_code = "0000";Statement st=null;String sql = "";Connection con=null;try {con=JdbcManager.getMySqlConnection();st=con.createStatement();for (String str : a) {sql="delete from "+str;st.addBatch(sql);}st.executeBatch();} catch (Exception e) {return_code = "1111";e.printStackTrace();} finally {DataSourceUtils.closeStatement(st);}return return_code;}