今天第一次换了netBeans平台来做东西，第一感觉还不错，但没想到卡在struts1.2.9上面了。
一直以来是用struts中的filter的方法来处理中文问题，但是没想到这次从struts1.0换到1.2.9，那个filter怎么设置都不行了。于是，花了一下午来看这部分。
最后找到解决方法了，还是在网上找到的，修改了一点代码后，可以正确运行了。代码如下：
原理就是struts的那个Action有问题，不够完善。重写一个这个方法就可以了。
重写一个类，如下：
package name.sahara.youth.struts;
/**
*
* @author jiahaolin
*/
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionServlet;
public class ActionServletUTF8Encoding extends ActionServlet {
protected void process(HttpServletRequest request,
HttpServletResponse response)
throws java.io.IOException, javax.servlet.ServletException {
request.setCharacterEncoding("UTF-8");
super.process(request, response);
}
}
这个类重写了process方法，然后再通过修改web.xml实现功能：修改的部分如下：
<servlet>
<servlet-name>action</servlet-name>
<!-- <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>-->
<servlet-class>name.sahara.youth.struts.ActionServletUTF8Encoding</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>3</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>3</param-value>
</init-param>
<load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
120
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>
index.jsp
</welcome-file>
</welcome-file-list>
一看就明白是什么意思，因此也很容易配置。
另外，现在我的应用仍然加了filter，不知道是不是要两个配合才能使用。
FILTER的代码如下：
package name.sahara.filters;
import javax.servlet.*;
import java.io.IOException;
/**
* <p>
* Filter that sets the character encoding to be used in parsing the incoming
* request, either unconditionally or only if the client did not specify a
* character encoding. Configuration of this filter is based on the following
* initialization parameters:
* </p>
* <ul>
* <li><strong>encoding</strong> - The character encoding to be configured for
* this request, either conditionally or unconditionally based on the
* <code>ignore</code> initialization parameter. This parameter is required,
* so there is no default.</li>
* <li><strong>ignore</strong> - If set to "true", any character encoding
* specified by the client is ignored, and the value returned by the
* <code>selectEncoding()</code> method is set. If set to "false,
* <code>selectEncoding()</code> is called <strong>only</strong> if the
* client has not already specified an encoding. By default, this parameter is
* set to "true".</li>
* </ul>
*
* <p>
* Although this filter can be used unchanged, it is also easy to subclass it
* and make the <code>selectEncoding()</code> method more intelligent about
* what encoding to choose, based on characteristics of the incoming request
* (such as the values of the <code>Accept-Language</code> and
* <code>User-Agent</code> headers, or a value stashed in the current user's
* session.
* </p>
*
* @author <a href="mailto:jwtronics@yahoo.com">John Wong</a>
*
* @version $Id: SetCharacterEncodingFilter.java,v 1.1 2002/04/10 13:59:27
* johnwong Exp $
*/
public class SetCharacterEncodingFilter implements Filter {
// ----------------------------------------------------- Instance Variables
/**
* The default character encoding to set for requests that pass through this
* filter.
*/
protected String encoding = null;
/**
* The filter configuration object we are associated with. If this value is
* null, this filter instance is not currently configured.
*/
protected FilterConfig filterConfig = null;
/**
* Should a character encoding specified by the client be ignored?
*/
protected boolean ignore = true;
// --------------------------------------------------------- Public Methods
/**
* Take this filter out of service.
*/
public void destroy() {
this.encoding = null;
this.filterConfig = null;
}
/**
* Select and set (if specified) the character encoding to be used to
* interpret request parameters for this request.
*
* @param request
* The servlet request we are processing
* @param result
* The servlet response we are creating
* @param chain
* The filter chain we are processing
*
* @exception IOException
* if an input/output error occurs
* @exception ServletException
* if a servlet error occurs
*/
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
// Conditionally select and set the character encoding to be used
if (ignore || (request.getCharacterEncoding() == null)) {
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
}
// Pass control on to the next filter
chain.doFilter(request, response);
}
/**
* Place this filter into service.
*
* @param filterConfig
* The filter configuration object
*/
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
String value = filterConfig.getInitParameter("ignore");
if (value == null)
this.ignore = true;
else if (value.equalsIgnoreCase("true"))
this.ignore = true;
else if (value.equalsIgnoreCase("yes"))
this.ignore = true;
else
this.ignore = false;
}
// ------------------------------------------------------ Protected Methods
/**
* Select an appropriate character encoding to be used, based on the
* characteristics of the current request and/or filter initialization
* parameters. If no character encoding should be set, return
* <code>null</code>.
* <p>
* The default implementation unconditionally returns the value configured
* by the <strong>encoding</strong> initialization parameter for this
* filter.
*
* @param request
* The servlet request we are processing
*/
protected String selectEncoding(ServletRequest request) {
return (this.encoding);
}
}
web.xml配置如下：
<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>name.sahara.filters.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF8</param-value>
</init-param>
<init-param>
<param-name>ignore</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Set Character Encoding</filter-name>
<servlet-name>*</servlet-name>
</filter-mapping>
今天太晚了，就不多试验了，明天再试一试吧。不过，乱码问题是绝对没有了。我用多个SERVLET容器测试过了。
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