Tomcat 表单乱码解决办法

Filter web.xml 的配置

 

<filter>
   <filter-name>TomcatFormFilter</filter-name>
   <filter-class>filters.TomcatFormFilter</filter-class>
</filter>
<filter-mapping>
   <filter-name>TomcatFormFilter</filter-name>
   <url-pattern>*.do</url-pattern>
</filter-mapping>

 

文件源码

 

package filters;
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.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
public class TomcatFormFilter implements Filter {
/**
   * Request.java
   * 对 HttpServletRequestWrapper 进行扩充, 不影响原来的功能并能提供所有的 HttpServletRequest
   * 接口中的功能. 它可以统一的对 Tomcat 默认设置下的中文问题进行解决而只需要用新的 Request 对象替换页面中的
   * request 对象即可.
   */
class Request extends HttpServletRequestWrapper
{
     public Request(HttpServletRequest request) {
     super(request);
     }
   /**
   * 转换由表单读取的数据的内码.
   * 从 ISO 字符转到 UTF-8 或 GBK.
   */
   public String toChi(String input) {
      try {
        byte[] bytes = input.getBytes("ISO8859-1");
        return new String(bytes, "UTF-8");
      }
      catch (Exception ex) {
      }
      return null;
   }
     /**
      * Return the HttpServletRequest holded by this object.
      */
     private HttpServletRequest getHttpServletRequest()
     {
         return (HttpServletRequest)super.getRequest();
     }
   /**
   * 读取参数 -- 修正了中文问题.
   */
     public String getParameter(String name)
     {
     return toChi(getHttpServletRequest().getParameter(name));
     }
   /**
   * 读取参数列表 - 修正了中文问题.
   */
     public String[] getParameterValues(String name)
     {
        String values[] = getHttpServletRequest().getParameterValues(name);
        if (values != null) {
          for (int i = 0; i < values.length; i++) {
            values[i] = toChi(values[i]);
          }
        }
        return values;
     }
}
public void destroy() {
  
}
public void doFilter(ServletRequest request, ServletResponse response,
    FilterChain chain) throws IOException, ServletException {
   HttpServletRequest httpreq = (HttpServletRequest)request;
   if(httpreq.getMethod().equals("POST")) {
    request.setCharacterEncoding("GBK");
   } else {
    request = new Request(httpreq);
   }
   chain.doFilter(request, response);
}
public void init(FilterConfig filterConfig) throws ServletException {
}
}