JSP+Servlet之間亂碼的解決僅僅只需一個Filter過濾器即可，為什么在Struts2.x+Hibernate3.0+Spring2.0（以下簡稱S2SH）中亂碼卻解決不了呢？因為在S2SH的整合中，Struts2.x的監聽監管了JSP頁面與Java代碼的咬合，這個監管也包括編碼的處理，所以當我們編寫了認為萬無一失的過濾器之后卻失效的原因，我的解決方案如下，在此拋磚引玉，如果有更好的辦法和建議，望大家提出來。

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import org.apache.struts2.dispatcher.FilterDispatcher;

public class MyFilter extends FilterDispatcher implements Filter {

    private FilterConfig config = null;

    private String encoding = null;

    @Override

    public void init(FilterConfig config) throws ServletException {

       this.config = config;

    }

    @Override

    public void doFilter(ServletRequest request, ServletResponse response,

           FilterChain chain) throws IOException, ServletException {

       if (encoding == null) {

           encoding = config.getInitParameter("encoding");

       }

       request.setCharacterEncoding(encoding);

       chain.doFilter(request, response);

    }

    @Override

    public void destroy() {

       config = null;

       encoding = null;

    }

}

這個過濾器和平時所編寫不同的是它集成自Struts2.x的FilterDispatcher，另外Web.xml的配置如下：

注意此處的順序，自己編寫的過濾器需要配置在首行

<!-- 解決中文亂碼問題 -->

    <filter>

       <filter-name>encodeFilter</filter-name>

       <filter-class>com.custservice.util.MyFilter</filter-class>

       <init-param>

           <param-name>encoding</param-name>

           <param-value>gb2312</param-value>

       </init-param>

    </filter>

    <filter-mapping>

       <filter-name>encodeFilter</filter-name>

       <url-pattern>/*</url-pattern>

    </filter-mapping>

    <filter>

       <filter-name>myfilter</filter-name>

       <filter-class>

           org.springframework.orm.hibernate3.support.OpenSessionInViewFilter

       </filter-class>

    </filter>

    <filter-mapping>

       <filter-name>myfilter</filter-name>

       <url-pattern>/*</url-pattern>

    </filter-mapping>

    <!-- Struts2的配置 -->

    <filter>

       <filter-name>struts2.x</filter-name>

       <filter-class>

           org.apache.struts2.dispatcher.FilterDispatcher

       </filter-class>

    </filter>

    <filter-mapping>

       <filter-name>struts2.x</filter-name>

       <url-pattern>/*</url-pattern>

    </filter-mapping>

Web.xml配置好后，還需要配置Struts2.x的屬性文件，在Struts2.x的資源文件夾中找到Struts.properties修改如下：

### This can be used to set your default locale and encoding scheme

 struts.locale=en_US

struts.i18n.encoding=iso-8859-1

改成

### This can be used to set your default locale and encoding scheme

 struts.locale=zh_US