package com.jcdm.common.utils;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.net.URLDecoder;
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import java.net.URLEncoder;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import javax.servlet.ServletRequest;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import org.springframework.web.context.request.RequestAttributes;
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import org.springframework.web.context.request.RequestContextHolder;
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import org.springframework.web.context.request.ServletRequestAttributes;
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import com.jcdm.common.constant.Constants;
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import com.jcdm.common.core.text.Convert;
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/**
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* 客户端工具类
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*
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* @author jc
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*/
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public class ServletUtils
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{
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/**
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* 获取String参数
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*/
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public static String getParameter(String name)
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{
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return getRequest().getParameter(name);
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}
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/**
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* 获取String参数
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*/
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public static String getParameter(String name, String defaultValue)
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{
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return Convert.toStr(getRequest().getParameter(name), defaultValue);
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}
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/**
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* 获取Integer参数
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*/
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public static Integer getParameterToInt(String name)
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{
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return Convert.toInt(getRequest().getParameter(name));
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}
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/**
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* 获取Integer参数
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*/
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public static Integer getParameterToInt(String name, Integer defaultValue)
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{
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return Convert.toInt(getRequest().getParameter(name), defaultValue);
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}
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/**
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* 获取Boolean参数
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*/
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public static Boolean getParameterToBool(String name)
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{
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return Convert.toBool(getRequest().getParameter(name));
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}
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/**
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* 获取Boolean参数
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*/
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public static Boolean getParameterToBool(String name, Boolean defaultValue)
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{
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return Convert.toBool(getRequest().getParameter(name), defaultValue);
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}
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/**
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* 获得所有请求参数
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*
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* @param request 请求对象{@link ServletRequest}
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* @return Map
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*/
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public static Map<String, String[]> getParams(ServletRequest request)
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{
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final Map<String, String[]> map = request.getParameterMap();
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return Collections.unmodifiableMap(map);
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}
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/**
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* 获得所有请求参数
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*
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* @param request 请求对象{@link ServletRequest}
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* @return Map
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*/
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public static Map<String, String> getParamMap(ServletRequest request)
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{
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Map<String, String> params = new HashMap<>();
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for (Map.Entry<String, String[]> entry : getParams(request).entrySet())
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{
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params.put(entry.getKey(), StringUtils.join(entry.getValue(), ","));
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}
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return params;
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}
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/**
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* 获取request
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*/
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public static HttpServletRequest getRequest()
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{
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return getRequestAttributes().getRequest();
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}
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/**
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* 获取response
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*/
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public static HttpServletResponse getResponse()
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{
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return getRequestAttributes().getResponse();
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}
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/**
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* 获取session
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*/
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public static HttpSession getSession()
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{
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return getRequest().getSession();
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}
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public static ServletRequestAttributes getRequestAttributes()
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{
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RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
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return (ServletRequestAttributes) attributes;
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}
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/**
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* 将字符串渲染到客户端
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*
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* @param response 渲染对象
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* @param string 待渲染的字符串
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*/
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public static void renderString(HttpServletResponse response, String string)
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{
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try
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{
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response.setStatus(200);
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response.setContentType("application/json");
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response.setCharacterEncoding("utf-8");
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response.getWriter().print(string);
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}
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catch (IOException e)
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{
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e.printStackTrace();
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}
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}
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/**
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* 是否是Ajax异步请求
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*
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* @param request
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*/
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public static boolean isAjaxRequest(HttpServletRequest request)
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{
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String accept = request.getHeader("accept");
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if (accept != null && accept.contains("application/json"))
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{
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return true;
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}
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String xRequestedWith = request.getHeader("X-Requested-With");
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if (xRequestedWith != null && xRequestedWith.contains("XMLHttpRequest"))
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{
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return true;
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}
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String uri = request.getRequestURI();
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if (StringUtils.inStringIgnoreCase(uri, ".json", ".xml"))
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{
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return true;
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}
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String ajax = request.getParameter("__ajax");
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return StringUtils.inStringIgnoreCase(ajax, "json", "xml");
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}
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/**
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* 内容编码
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*
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* @param str 内容
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* @return 编码后的内容
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*/
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public static String urlEncode(String str)
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{
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try
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{
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return URLEncoder.encode(str, Constants.UTF8);
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}
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catch (UnsupportedEncodingException e)
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{
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return StringUtils.EMPTY;
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}
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}
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/**
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* 内容解码
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*
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* @param str 内容
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* @return 解码后的内容
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*/
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public static String urlDecode(String str)
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{
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try
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{
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return URLDecoder.decode(str, Constants.UTF8);
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}
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catch (UnsupportedEncodingException e)
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{
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return StringUtils.EMPTY;
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}
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}
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}
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