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package com.huaheng.common.utils;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import com.huaheng.common.support.Convert;
/**
* 客户端工具类
*
* @author huaheng
*/
public class ServletUtils
{
/**
* 获取String参数
*/
public static String getParameter(String name)
{
return getRequest().getParameter(name);
}
/**
* 获取String参数
*/
public static String getParameter(String name, String defaultValue)
{
return Convert.toStr(getRequest().getParameter(name), defaultValue);
}
/**
* 获取Integer参数
*/
public static Integer getParameterToInt(String name)
{
return Convert.toInt(getRequest().getParameter(name));
}
/**
* 获取Integer参数
*/
public static Integer getParameterToInt(String name, Integer defaultValue)
{
return Convert.toInt(getRequest().getParameter(name), defaultValue);
}
/**
* 获取request
*/
public static HttpServletRequest getRequest()
{
return getRequestAttributes().getRequest();
}
/**
* 获取response
*/
public static HttpServletResponse getResponse()
{
return getRequestAttributes().getResponse();
}
/**
* 获取session
*/
public static HttpSession getSession()
{
return getRequest().getSession();
}
public static ServletRequestAttributes getRequestAttributes()
{
RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
return (ServletRequestAttributes) attributes;
}
/**
* 将字符串渲染到客户端
*
* @param response 渲染对象
* @param string 待渲染的字符串
* @return null
*/
public static String renderString(HttpServletResponse response, String string)
{
try
{
response.setContentType("application/json");
response.setCharacterEncoding("utf-8");
response.getWriter().print(string);
}
catch (IOException e)
{
e.printStackTrace();
}
return null;
}
/**
* 是否是Ajax异步请求
*
* @param request
*/
public static boolean isAjaxRequest(HttpServletRequest request)
{
String accept = request.getHeader("accept");
if (accept != null && accept.indexOf("application/json") != -1)
{
return true;
}
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String xRequestedWith = request.getHeader("X-Requested-With");
if (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1)
{
return true;
}
String uri = request.getRequestURI();
if (StringUtils.inStringIgnoreCase(uri, ".json", ".xml"))
{
return true;
}
String ajax = request.getParameter("__ajax");
if (StringUtils.inStringIgnoreCase(ajax, "json", "xml"))
{
return true;
}
return false;
}
}
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