<%@ page contentType="text/html; charset=UTF-8"%>
统一编码，页面使用UTF-8，数据库也用，同时TOMCAT的POST和GET方式传数据也要设置为UTF-8，
POST方式好说,request.setCharacterEncoding("UTF-8")就可以了，GET方式就要修改server.xml
<Connector port="80" maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100" debug="0"
connectionTimeout="20000" disableUploadTimeout="true" URIEncoding="UTF-8"/>