MyJavawebProject/src/com/filter/EncodingFilter.java

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//字符编码的过滤器
package com.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 EncodingFilter implements Filter{
	public EncodingFilter(){
		System.out.println("过滤器构造");
	}
	public void destroy() {
		System.out.println("过滤器销毁");
	}
	public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {
		request.setCharacterEncoding("utf-8"); //将编码改为utf-8
		response.setContentType("text/html;charset=utf-8");
		chain.doFilter(request, response);
	}
 
	public void init(FilterConfig arg0) throws ServletException {
		System.out.println("过滤器初始化");
	}
 
}