Action里取值乱码问题

  今天做了一个简单的structs的添加功能，在action里得到值总是乱码，

1 。 我写了过滤器类

public class SetCharacterEncodingFilter implements Filter {

  protected String encoding = null;
 
  protected FilterConfig filterConfig = null;
  
 
 
 public void destroy() {
  this.encoding = null;
        this.filterConfig = null;

 }

 public void doFilter(ServletRequest request, ServletResponse response,
   FilterChain chain) throws IOException, ServletException {
  
        if ( (request.getCharacterEncoding() == null)) {
            String encoding = selectEncoding(request);
            if (encoding != null) {
                request.setCharacterEncoding(encoding);
            }
        }

        // Pass control on to the next filter
        chain.doFilter(request, response);

 }

 public void init(FilterConfig filterConfig) throws ServletException {
  
  this.filterConfig = filterConfig;
        this.encoding = filterConfig.getInitParameter("encoding");

 }
    protected String selectEncoding(ServletRequest request) {

        return this.encoding;
    }

}

 

2. 在web.xml加了配置

  <filter>
  <filter-name>Set Character Encoding</filter-name>
  <filter-class>
   com.shanxiu.test1.common.SetCharacterEncodingFilter
  </filter-class>
  <init-param>
   <param-name>encoding</param-name>
   <param-value>UTF-8</param-value>
  </init-param>
 </filter>
 <filter-mapping>
  <filter-name>Set Character Encoding</filter-name>
  <url-pattern>*.do</url-pattern>
 </filter-mapping>

我调式了很多次，每次请请求也就走过滤器类的doFilter（），可就是得到值还是乱码。我对那个值进行

new String(friendform.getFdetail().getBytes("ISO8859-1"),"UTF-8"); 处理后，这个值不乱码了，可总不能为

每一个值这样去处理，同事也在帮我看，她在看tomcat里的server.xml

发现在 <Connector> 加了 URIEncoding="UTF-8" 也就是下面这样后，

    <Connector
port="8080"               maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true" URIEncoding="UTF-8" />

试运行一下，不乱码了。写出来，上其他遇到此类情况的朋友。。。