JSP页面传输到MySQL数据库时，中文为乱码（数据库中存储乱码）解决方法：
将所有的涉及到编码的都设置为utf-8即可。
执行mysql> show variables like 'character%';命令查看mysql使用的编码方式：
mysql> show variables like 'character%'; +--------------------------+------------------------------------------------------+ | Variable_name | Value | +--------------------------+------------------------------------------------------+ | character_set_client | utf8 | | character_set_connection | utf8 | | character_set_database | utf8 | | character_set_filesystem | binary | | character_set_results | utf8 | | character_set_server | latin1 | | character_set_system | utf8 | | character_sets_dir | D:Program Filesmysql-5.6.20-winx64sharecharsets | +--------------------------+------------------------------------------------------+
修改数据库编码执行命令： mysql> alter database db_name character set utf8;
修改其他编码： mysql> set names 'utf8';
设置JSP页面编码：在页面顶部添加：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
修改数据库连接DriverManager.getConnection(url, usr, pwd)的url：
String url = "jdbc:mysql://localhost:3306/db_name?useUnicode=true&characterEncoding=utf-8";
在发送页面和接收页面顶部都添加以下代码：
<% request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html; charset=utf-8");
%>推荐：MySQL教程
