JAVA实现301永久重定向方法

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%
// 转到iq.jsp
out.clearBuffer();
response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
String param = request.getQueryString();
response.setHeader("Location","iq.jsp"+(param==null?"":("?"+param)));
%>

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>  
<%  
 // 转到iq.jsp   
out.clearBuffer();   
response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);    
String param = request.getQueryString();  
response.setHeader("Location","iq.jsp"+(param==null?"":("?"+param)));  
%> 

response.setHeader("Location","http://www.laozizhu.com/iq.jsp"+(param==null?"":("?"+param)));

response.setHeader("Location","http://www.laozizhu.com/iq.jsp"+(param==null?"":("?"+param)));  

response.sendRedirect(http://www.baidu.com);

response.sendRedirect("http://www.baidu.com");