获取请求头杂七杂八的信息

获取请求头信息

/**
* 获取请求前次页面信息
* @param request
* @return
*/
public static String getReferer(HttpServletRequest request) {
StringBuilder sb = new StringBuilder();
Enumeration<String> sts = request.getHeaders("Referer");
while (sts.hasMoreElements()) {
sb.append(sts.nextElement());
}
return sb.toString();
}

/**
* 获取请求头信息
* @param request
* @return
*/
public static String getUserAgent(HttpServletRequest request) {
StringBuilder sb = new StringBuilder();
Enumeration<String> sts = request.getHeaders("User-Agent");
while (sts.hasMoreElements()) {
sb.append(sts.nextElement());
}
return sb.toString();
}
/**
* 获取请求头语言信息
* @param request
* @return
*/
public static String getAcceptLanguage(HttpServletRequest request) {
StringBuilder sb = new StringBuilder();
Enumeration<String> sts = request.getHeaders("Accept-Language");
while (sts.hasMoreElements()) {
sb.append(sts.nextElement());
}
return sb.toString();
}

/**
*
* @param request
* @return
*/
public static String getCookie(HttpServletRequest request) {
StringBuilder sb = new StringBuilder();
Enumeration<String> sts = request.getHeaders("Cookie");
while (sts.hasMoreElements()) {
sb.append(sts.nextElement());
}
return sb.toString();
}

public static HashMap<String, Object> doPostParams(HttpServletRequest request)
throws ServletException, IOException {

HashMap<String, Object> result = new HashMap<String, Object>();
// 取出客户提交的参数集
Enumeration<String> paramNames = request.getParameterNames();
// 遍历参数集取出每个参数的名称及值
while (paramNames.hasMoreElements()) {
String name = paramNames.nextElement(); // 取出参数名称
String values[] = request.getParameterValues(name); // 根据参数名称取出其值
// 如果参数值集不为空
if (values != null) {
// 如果参数值集中只有一个值
if (values.length == 1) {
try {
// 调用 toUTF(values[0]) 函数 ,(values[0] 即第一个参数值 )
// 方法转换参数值的字元编码
String vlustr = toUTF(values[0]);
// 并将该值以属性的形式藏在 request
request.setAttribute(name, vlustr);
result.put(name, vlustr);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}

// 如果参数值集中有多个值
else {
// 遍历参数值集
for (int i = 0; i < values.length; i++) {
try {
// 回圈依次将每个值调用 toUTF(values[i]) 方法转换参数值的字元编码
String vlustr = toUTF(values[i]);
values[i] = vlustr;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
// 将该值以属性的形式藏在 request
request.setAttribute(name, values);
result.put(name, values);
}
}
}
return result;
}

/**
* 将 inStr 转为 UTF - 8 的编码形式
*
* @param inStr
* 输入字符串
* @return UTF - 8 的编码形式的字符串
* @throws UnsupportedEncodingException
*/
public static String toUTF(String inStr) throws UnsupportedEncodingException {
String outStr = "";
if (inStr != null) {
// outStr=java.net.URLDecoder.decode(inStr);// 不用 decode 了 ,
// 到这的时候就已经自动 decode 过了
// 将字符串转为 UTF-8 编码形式
outStr = new String(inStr.getBytes("iso-8859-1"), "UTF-8");
}
return outStr;
}