springMVC--拦截器配置

springMVC--拦截器配置：

自定义拦截器类，实现HandleIntercepor接口或者继承HandlerInterceptorAdaptor类。
springMVC.xml配置：

操作request和responce :

获得requestBody内容：

BufferedReader br = request.getReader();  
while((str = br.readline()) != null){
     body += str ; 
}

获得requestHead :

Emuneration headerNames = request.getHeaderNames();
while(headerNames.hasMoreElements ){
    String name = (String) headerNames.nextElement();
    String headValue = request.getHeader(name);
}

responce写入数据：

  PrintWriter print = responce.getWriter();
  print.append(data.toString() );