FilterテクノロジーによるPOST要求の符号化

Webでxmlでは、必ずこのFilterを一番前に置くことを覚えておいてください

<filter>
    <display-name>EncodingFilter</display-name>
    <filter-name>EncodingFilter</filter-name>
    <filter-class>bruce.zhao.cms.backend.view.EncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>EncodingFilter</filter-name>
    <url-pattern>/admin/*</url-pattern>
  </filter-mapping>

 
 

/**
 * Servlet Filter implementation class EncodingFilter
 */
public class EncodingFilter implements Filter {

	private String encoding;
    /**
     * Default constructor. 
     */
    public EncodingFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here
		HttpServletRequest httpServletRequest=(HttpServletRequest)request;
		httpServletRequest.setCharacterEncoding(encoding);
		// pass the request along the filter chain
		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
		encoding=fConfig.getInitParameter("encoding");
	}

}