前端处理：

JSP : <%@page  pageEncoding="utf-8" %>
HTML : <meta charset="UTF-8">

后端处理：

GET请求（request）乱码处理：

<!-- Tomcat的sever.xml中添加配置：URIEncoding=utf-8 --><Connector port="8080" protocol="HTTP/1.1"connectionTimeout="20000"redirectPort="8443" URIEncoding="UTF-8"/>

POST请求（request）乱码处理：

<!-- 在web.xml中设置，添加以下配置，此过滤器会进行：request.setCharactorEncoding("utf-8"); -->
<filter><filter-name>encoding</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param>
</filter>
<filter-mapping><filter-name>encoding</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>

响应（response）乱码处理：

<!-- 在springmvc配置文件中添加如下配置 -->
<mvc:annotation-driven><mvc:message-converters register-defaults="true"><bean class="org.springframework.http.converter.StringHttpMessageConverter"><property name="supportedMediaTypes"><list><value>text/html;charset=UTF-8</value><value>application/json;charset=UTF-8</value></list></property></bean></mvc:message-converters>
</mvc:annotation-driven>