encodingfilter.java

公司自己开发的工作流引擎

package cn.com.iaspec.encodingfilter.web;

import javax.servlet.ServletException;
import javax.servlet.ServletContext;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.http.HttpSession;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class EncodingFilter
    implements Filter{

  private FilterConfig config=null;

  // default to ASCII
  private String targetEncoding="ASCII";

  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);
    // move on to the next
    chain.doFilter(srequest,sresponse);
  }
}