a.首先在struts.xml中加固定值（和jsp页面的编码要一致）
<constantname="struts.i18n.encoding"value="UTF-8"></constant>
b.若不行，再写一个filter过滤器，处理中文字符编码转换问题：
packagefilters;
importjava.io.IOException;
importjavax.servlet.Filter;
importjavax.servlet.FilterChain;
importjavax.servlet.FilterConfig;
importjavax.servlet.ServletException;
importjavax.servlet.ServletRequest;
importjavax.servlet.ServletResponse;
public classTomcatFilter implements Filter {
public void destroy()
{ }
public void doFilter(ServletRequest req,ServletResponse res,
FilterChain chain) throws IOException,ServletException {
req.setCharacterEncoding("UTF-8");
chain.doFilter(req, res);
}
public void init(FilterConfig arg0) throwsServletException { }
public boolean accept(Object arg0) throwsIOException {
// TODO Auto-generated method stub
return false;
}
}
注：实现Filter接口，要引入importjavax.servlet.Filter这个包，否则会报错。
然后，在web.xml中进行配置，记住要配在<filter-name>struts2</filter-name>之前。
<filter>
<display-name>TomcatFilter</display-name>
<filter-name>TomcatFilter</filter-name>
<filter-class>filters.TomcatFilter</filter-class>
</filter>
<filter-mapping>
c.要保证数据库的编码与刚才的编码都一致