Roy 网友指出，用Filter处理Struts中文乱码才是王道，原文请参考这里：
Struts Hack！解决中文参数在Form Bean中的乱码问题！
filter的用法，的确是比较有扩展性的一种方法...可以通过filter结合读取web.xml中的filter参数来完成一系列的动作，做法如下：
首先，实现javax.servlet.Filter接口，编写一个处理request编码的过滤器类...
package tutorial.struts.filter;
import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;
import java.io.IOException;
public class SetCharacterEncodingFilter implements Filter {
protected FilterConfig filterConfig;
protected String encodingName;
protected boolean enable;
public SetCharacterEncodingFilter() {
this.encodingName = "UTF-8";
this.enable = false;
}
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
loadConfigParams();
}
private void loadConfigParams() {
//encoding
this.encodingName = this.filterConfig.getInitParameter("encoding");
//filter enable flag
String strIgnoreFlag = this.filterConfig.getInitParameter("enable");
if (strIgnoreFlag.equalsIgnoreCase("true")) {
this.enable = true;
} else {
this.enable = false;
}
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
if(this.enable) {
request.setCharacterEncoding(this.encodingName);
}
chain.doFilter(request, response);
}
public void destroy() {
}
}
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然后，需要在web.xml中注册我们的过滤器类：
filter>
filter-name>Set Character Encodingfilter-name>
filter-class>tutorial.struts.filter.SetCharacterEncodingFilterfilter-class>
init-param>
param-name>encodingparam-name>
param-value>UTF-8param-value>
init-param>
init-param>
param-name>enableparam-name>
param-value>trueparam-value>
init-param>
filter>
filter-mapping>
filter-name>Set Character Encodingfilter-name>
servlet-name>Action Servletservlet-name>
filter-mapping>
filter-mapping>
filter-name>Set Character Encodingfilter-name>
servlet-name>Faces Servletservlet-name>
filter-mapping>
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这样，任何通过Struts，或是JSF的Controller Servlet处理的request，都会在过滤器中先行处理，才把控制权交还给Struts或是JSF，而且Filter中有一个Process Chain的概念，是一个很吸引人的东东~~！