characterfilter.java

学生成绩管理系统JPA做的

package com.fengmanfei.student.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 CharacterFilter implements Filter {

	private String characterEncoding;

	private boolean enabled;

	public void destroy() {
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {

		if (enabled) {
			request.setCharacterEncoding(characterEncoding);
			response.setCharacterEncoding(characterEncoding);
		}

		chain.doFilter(request, response);

	}

	public void init(FilterConfig config) throws ServletException {
		characterEncoding = config.getInitParameter("characterEncoding");
		enabled = "1".equals(config.getInitParameter("enabled"));
	}

}