现象是：更新操作完成后，本应该是中文的字段都莫名其妙变成了乱码。

比较了两个版本的代码，经过排除后，发现问题出在一个filter中，下面是出问题的代码：

public class MyFilter extends StrutsPrepareAndExecuteFilter {  public void doFilter (ServletRequest servletRequest......) {    HttpServletRequest request  =(HttpServletRequest)servletrequest;    // 就是这一行，如果没有这一行，就不会出现乱码的现象    (String) name = request.getParameter("person.name");    ...    ...    super.doFilter(.....);  }}}

解决办法：

web.xml 增加编码过滤器
      
     
      encoding
       
     
         com.skysz.framework.filter.encoding.EncodingFilter  
      
    EnCodingFilter 实现类public class EncodingFilter implements Filter { private String encoding; public void init(FilterConfig config) throws ServletException {  this.encoding = config.getInitParameter("encoding");  if (StringUtils.isNullOrBlank(this.encoding)) {   this.encoding = "UTF-8";  }} public void doFilter(ServletRequest srequest, ServletResponse sresponse,   FilterChain chain) throws IOException, ServletException {  HttpServletRequest request = (HttpServletRequest) srequest;  request.setCharacterEncoding(encoding);  chain.doFilter(srequest, sresponse); }public void destroy() { }}