setcharacterencodingfilter.java

Java Struts的学习经典入门例子

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.UnavailableException;

/**
 * Example filter that sets the character encoding to be used in parsing the
 * incoming request
 */
public class SetCharacterEncodingFilter implements Filter {

    /**
     * Take this filter out of service.
     */
    public void destroy() {
    }
    /**
     * Select and set (if specified) the character encoding to be used to
     * interpret request parameters for this request.
     */
    public void doFilter(ServletRequest request, ServletResponse response,
    FilterChain chain)throws IOException, ServletException {

    request.setCharacterEncoding("UTF-8");

    // 传递控制到下一个过滤器
    chain.doFilter(request, response);
    }

    public void init(FilterConfig filterConfig) throws ServletException {
    }
}