使用动态代理解决get参数中文乱码

public class RequestHandler implements InvocationHandler {
	HttpServletRequest request;
	public RequestHandler(HttpServletRequest request){
		this.request=request;
		
	}
	
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		// TODO Auto-generated method stub
		
	 	Object result=method.invoke(request, args);
	 	if(method.getName().equals("getParameter")){
                     //根据项目的统一编码类型调整红色部分
	 		if(result != null){
                            result =new String(((String)result).getBytes("ISO-8859-1"),"UTF-8");
                        }
                }
		return result;
	}
}

 在web.xml配置一个过滤器，关键代码如下

 

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		InvocationHandler handler = new RequestHandler((HttpServletRequest)arg0);
		HttpServletRequest request=(HttpServletRequest)Proxy.newProxyInstance(arg0.getClass().getClassLoader(), arg0.getClass().getInterfaces(), handler);
		
		arg2.doFilter(request, arg1);
	}

 通过以上程序的拦截处理，你在action中使用request.getParameter方法获取参数时就可以得到正确的解码值