web项目使用spring时，可以使用Spring提供的字符集过滤filter，非常方便对于有中文的字符设置
<!-- 设置请求编码格式为UTF-8 --> <filter> <filter-name>springEncoding</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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter>
需要设置的两个参数为encoding、forceEncoding,分别设置字符集，及是否设置字符集，该filter也非常简单
public class CharacterEncodingFilter extends OncePerRequestFilter
{
public CharacterEncodingFilter()
{
forceEncoding = false;
}
public void setEncoding(String encoding)
{
this.encoding = encoding;
}
public void setForceEncoding(boolean forceEncoding)
{
this.forceEncoding = forceEncoding;
}
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException
{
if(encoding != null && (forceEncoding || request.getCharacterEncoding() == null))
{
request.setCharacterEncoding(encoding);
if(forceEncoding)
response.setCharacterEncoding(encoding);
}
filterChain.doFilter(request, response);
}
private String encoding;
private boolean forceEncoding;
}
主要流程即判断是否需要设置字符集，及设置什么字符集。对于web项目来说非常简单易用
Spring CharacterEncodingFilter
原文：http://www.cnblogs.com/ikuman/p/4172562.html