encodingfilter.java

持久层hibernate技术使用的一个例子

package cn.hope.front.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.HttpServletRequest;

public class EncodingFilter
    implements Filter {

  FilterConfig config = null;
  // default to GBK
  private String targetEncoding = "GBK";

  public void init(FilterConfig config) throws ServletException {
    this.config = config;
    this.targetEncoding = config.getInitParameter("encoding");
  }

  public void destroy() {
    config = null;
    targetEncoding = null;
  }

  public void doFilter(ServletRequest srequest, ServletResponse sresponse,
                       FilterChain chain) throws IOException, ServletException {

    HttpServletRequest request = (HttpServletRequest) srequest;
    request.setCharacterEncoding(targetEncoding);
    chain.doFilter(srequest, sresponse);
  }
}