web.xml配置（必須放在struts2配置之前）：

<!-- 字元編碼過濾器配置-->

<filter>
<filter-name>CharEncodingFilter</filter-name>
<filter-class>com.crm.tools.CharEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name> 
<param-value>UTF-8</param-value> 
</init-param>
</filter>
<filter-mapping>
<filter-name>CharEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>


<!-- Struts2過濾器配置-->
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<!-- 其它配置-->
 

自定義CharEncodingFilter類實現Filter介面：

package com.crm.tools;

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 javax.servlet.annotation.WebFilter;

/**
 * 字元過濾器
 */

@WebFilter("/CharEncodingFilter")
public class CharEncodingFilter implements Filter {

　　//設定為UTF-8
    public void doFilter(ServletRequest request, ServletResponse response,

        FilterChain chain) throws IOException, ServletException {
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        chain.doFilter(request, response);

    }

　　//初始化
    public void init(FilterConfig filterConfig) throws ServletException {
      
    }

　　//銷燬
    public void destroy() {

    }

}
 

字元編碼過濾器必須放在其它過濾器之前，還有請求的表單必須為post，反正我試過，不指定method屬性進行提交的話，會出現亂碼