Spring 过滤器获取前置请求地址

　　

String method = StringUtils.trimToEmpty(request_.getMethod()).toUpperCase();
String strBackUrl = "";
String entryId = "";
String common_url = "http://" + request_.getServerName() //服务器地址
+ ":" + request_.getServerPort() //端口号
+ request_.getContextPath() //项目名称
+ request_.getServletPath() //请求页面或其他地址
+ "?";
if (method.equals("POST")) {
Map<String, String[]> params = request.getParameterMap();
String queryString = "";
for (String key : params.keySet()) {
String[] values = params.get(key);
for (int i = 0; i < values.length; i++) {
String value = values[i];
queryString += key + "=" + value + "&";
}
}
// 去掉最后一个空格
try {
if (!"".equals(queryString)) {
strBackUrl = common_url+ queryString.substring(0,queryString.length() - 1);
} else {
strBackUrl = common_url.substring(0,common_url.length() - 1);
}
} catch (Exception e) {
logger.debug("", e);
}
} else if (method.equals("GET")) {
strBackUrl = common_url + (request_.getQueryString()); //参数
} else {
logger.debug("此连接不打印");
}