字符编码过滤器

字符编码过滤器

代码

Servlet 部分

package com.anluy.sr.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;

import javax.servlet.http.HttpServlet;

public class SetCharacterEncodingFilter extends HttpServlet implements Filter { private static final long serialVersionUID = 1L;

private String encoding = null ;

public void destroy() {

this.encoding = null ;

}

@Override

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

if( this.encoding != null ){

request.setCharacterEncoding(this.encoding);

response.setContentType("text/html;charset=" + this.encoding);

chain.doFilter(request, response);

}

}

@Override

public void init(FilterConfig filterConfig) throws ServletException {

this.encoding = filterConfig.getInitParameter("encoding"); //从web.xml中读取字符编码

的值

}

}

web.xml 部分

SetCharacterEncodingFilter

com.anluy.sr.filter.SetCharacterEncodingFilter

encoding

UTF-8

SetCharacterEncodingFilter

/*