etfilter.java

出试卷系统（包括前台教师出卷系统

package 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;

public class ETFilter implements Filter {
	private static final String DEFAULT_ENCODING = "GBK";
	private String encoding;

	public void destroy()
	{
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
	{
		request.setCharacterEncoding(encoding);
		response.setCharacterEncoding(encoding);
		chain.doFilter(request, response);
	}

	public void init(FilterConfig filterConfig) throws ServletException
	{
		this.encoding = filterConfig.getInitParameter("encoding");
		if(encoding==null || "".equals(encoding.trim()) || encoding.trim().length()==0){
			encoding = DEFAULT_ENCODING;
		}
	}

}