Java的几个实用小Util函数（日期处理和http）

/**

* 根据日期返回当前日期是一年的第几天

* @param date

* @return

*/

public static int orderDate(String dateStr) {

if(dateStr == null || dateStr.trim().length() == 0) return 0;

int dateSum = 0;

int year = Integer.valueOf(dateStr.substring(0, 4));

int month = Integer.valueOf(dateStr.substring(5, 7));

int day = Integer.valueOf(dateStr.substring(8, 10));

for (int i = 1; i < month; i++) {

switch (i) {

case 1:

case 3:

case 5:

case 7:

case 8:

case 10:

case 12:

dateSum += 31;

break;

case 4:

case 6:

case 9:

case 11:

dateSum += 30;

break;

case 2:

if (((year % 4 == 0) & (year % 100 != 0)) | (year % 400 == 0))

dateSum += 29;

else

dateSum += 28;

}

}

return dateSum = dateSum + day;

}

/**

* @ 获得两个日期之间的 格式化的日期（天）集合

*/

public static List<String> getMMDDList(String start, String end) {

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

SimpleDateFormat sdfout = new SimpleDateFormat("MMdd");

List<String> list = new ArrayList<String>();

try {

Date date_start = sdf.parse(start);

Date date_end = sdf.parse(end);

Date date = date_start;

Calendar cd = Calendar.getInstance();

while (date.getTime() <= date_end.getTime()) {

list.add(sdfout.format(date));

cd.setTime(date);

cd.add(Calendar.DATE, 1);// 增加一天

date = cd.getTime();

}

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return list;

}

/**

*

* @方法名：testWsdlConnection

* @功能说明：测试webservice地址是否可用

* @return

*/

public static boolean testWsdlConnection(String address){

boolean flag = false;

try {

URL urlObj = new URL(address);

HttpURLConnection oc = (HttpURLConnection) urlObj.openConnection();

oc.setUseCaches(false);

oc.setConnectTimeout(5000);
//设置超时时间5s

int status = oc.getResponseCode();//请求状态

if(200 == status){

return true;

}

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}catch (Exception e) {

e.printStackTrace();

}

return flag;

}