利用动态代理解决网站乱码问题

利用动态代理解决网站乱码问题

新建一个Filter，配置设置为REQUEST或全局

代码如下：

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    final HttpServletRequest req = (HttpServletRequest)request;

    HttpServletRequest myrequest = (HttpServletRequest) Proxy.newProxyInstance(EcodeingFilter.class.getClassLoader(), 
            req.getClass().getInterfaces(), new InvocationHandler() {
    
        @Override
        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
            Object obj = null;
            if ("getParameter".equalsIgnoreCase(method.getName())) {
                String md = req.getMethod();
                if ("GET".equalsIgnoreCase(md)) {
                    String v = (String) method.invoke(req, args);
                    return new String(v.getBytes("iso-8859-1"), "UTF-8");
                }else if ("POST".equals(md)) {
                    req.setCharacterEncoding("UTF-8");
                    return method.invoke(req, args);
                }
            }else {//PUT
                    return method.invoke(req, args);
            }
            return obj;
        }
    } );
    
    chain.doFilter(myrequest, response);
}