通过过滤器（Filter）解决JSP的Post和Request中文乱码问题


            jsp代码：





import javax.servlet.*;

import javax.servlet.http.*;



public class CharsetFilter implements Filter

{

  public void destroy() 

  {

    

  }

  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) 

  {

    try

    {

      HttpServletRequest httpRequest = (HttpServletRequest)request;

      String method = httpRequest.getMethod().toLowerCase();

      if(method.equals("post"))

      {

        //如果是post，即表单方法，直接设置charset即可

        request.setCharacterEncoding("UTF-8");

      }

      else if(method.equals("get"))

      {

        //如果是get方法

        request.setCharacterEncoding("UTF-8");

        request = new HttpServletRequestWrapper((HttpServletRequest)request)

        {

          public String getParameter(String str)

          {

            try

            {

              return new String(super.getParameter(str).getBytes("iso-8859-1"),"GBK");

            }

            catch(Exception e)

            {

              return null;

            }

   

          }

        };

      }

      

      chain.doFilter(request, response);

    }

    catch(Exception e){}

  }

  

  public void init(FilterConfig filterConfig) 

  {

    

  }

}



过滤器配置：





<filter>

    <filter-name>CharFilter</filter-name>

    <filter-class>CharsetFilter</filter-class>

</filter>

<filter-mapping>

    <filter-name>CharFilter</filter-name>

    <url-pattern>/*</url-pattern>

    <dispatcher>REQUEST</dispatcher>

</filter-mapping>