[java]代码库package cn.edu.itcast.filter;

import java.io.IOException;

import java.io.UnsupportedEncodingException;

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.HttpServletRequest;

import javax.servlet.http.HttpServletRequestWrapper;

import javax.servlet.http.HttpServletResponse;

// 解决全站中文乱码的问题

public class AllCharacterFilter implements Filter{

private FilterConfig filterConfig ;

@Override

public void init(FilterConfig arg0) throws ServletException {

this.filterConfig = arg0 ;

}

@Override

public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {

System.out.println("整站中文过滤器开始............");

HttpServletRequest request = (HttpServletRequest)req ;

HttpServletResponse response = (HttpServletResponse)res ;

String encoding = filterConfig.getInitParameter("encoding");

if(encoding == null){

encoding = "UTF-8" ;

}

// 默认只能解决POST方式的中文乱码问题

request.setCharacterEncoding(encoding) ;

response.setCharacterEncoding(encoding) ;

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

MyHttpServletRequest myRequest = new MyHttpServletRequest(request);

chain.doFilter(myRequest, response) ;

System.out.println("整站中文过滤器结束............");

}

@Override

public void destroy() {

}

}

// 包装设计模式修改GET请求处理方式

class MyHttpServletRequest extends HttpServletRequestWrapper

{

public MyHttpServletRequest(HttpServletRequest request)

{

super(request);

}

@Override

public String getParameter(String name)

{

String value = super.getParameter(name) ;

if(value != null)

{

String method = super.getMethod() ;

if("get".equalsIgnoreCase(method))

{

try

{

value = new String (value.getBytes("ISO-8859-1"),super.getCharacterEncoding()) ;

} catch (UnsupportedEncodingException e)

{

e.printStackTrace();

}

}

}

return value ;

}

}