解决中文乱码的问题

1 借助spring web.xml中增加

<filter>      
<filter-name>Set Character Encoding</filter-name>      
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>      
<init-param>      
    <param-name>encoding</param-name>      
    <param-value>utf8</param-value>      
</init-param>      
</filter>      
<filter-mapping>      
    <filter-name>Set Character Encoding</filter-name>      
    <url-pattern>/*</url-pattern>      
</filter-mapping>  

如果不用spring怎么办呢？

<filter>  
   <filter-name>encodingFilter</filter-name>  
   <filter-class>com.rda.commons.filter.ChineseFilter</filter-class>  
   <init-param>  
    <param-name>encoding</param-name>  
    <param-value>UTF-8</param-value>  
   </init-param>  
   <init-param>  
    <param-name>forceEncoding</param-name>  
    <param-value>true</param-value>  
   </init-param>  
</filter>  
<filter-mapping>  
   <filter-name>encodingFilter</filter-name>  
   <url-pattern>/*</url-pattern>  
</filter-mapping>  

配置文件，然后呢，转码的过滤器就要自己写咯

package com.filter;   
  
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.http.HttpServlet;   
import javax.servlet.http.HttpServletRequest;   
import javax.servlet.http.HttpServletResponse;   
  
/**  
*   
* 创建人：ayanline  
* 创建时间：2008-9-21  
* 类作用：中文转码过滤器  
*  
*/  
@SuppressWarnings("serial")   
public class ChineseFilter extends HttpServlet implements Filter   
{   
private FilterConfig filterConfig;   
  
public void init(FilterConfig filterConfig) throws ServletException   
{   
   this.filterConfig = filterConfig;   
}   
  
public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain)   
{   
   try  
   {   
    String encoding = filterConfig.getInitParameter("encoding");   
    //从WEB.xml配置文件中取出参数，这样我们可以通过配置修改编码格式.   
    request.setCharacterEncoding(encoding);//设置请求的编码格式   
  
    filterChain.doFilter(request, response);   
   }   
   catch (ServletException sx)   
   {   
    filterConfig.getServletContext().log(sx.getMessage());   
   }   
   catch (IOException iox)   
   {   
    filterConfig.getServletContext().log(iox.getMessage());   
   }   
}   
  
public void destroy()   
{   
}   
  
protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException   
{   
   super.doGet(arg0, arg1);   
}   
  
protected void doPost(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException   
{   
   super.doPost(arg0, arg1);   
}   
  
/**  
* @function 验证数据是否为空，如果为空则转换  
* @param param  
* @return String  
*/  
public String checkNull(String param)   
{   
   if (param == null || param.equals(""))   
   {   
    return "";   
   }   
   else  
   {   
    return param;   
   }   
}   
} 

或

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 NewFilterDispatcher extends FilterDispatcher {
     private static String encoding = "utf-8";
 
        public void init(FilterConfig filterConfig) throws ServletException {
            super.init(filterConfig);
            String encodingParam = filterConfig.getInitParameter("encoding");
            if (encodingParam != null && encodingParam.trim().length() != 0) {
                encoding = encodingParam;
            }
        }
 
        public void doFilter(ServletRequest request, ServletResponse response,
                FilterChain chain) throws IOException, ServletException {
            request.setCharacterEncoding(encoding);
            super.doFilter(request, response, chain);
        }
}