public static String getRandomPwd() {
Random rd = new Random();
String n = "";
int getNum;
do {
getNum = Math.abs(rd.nextInt()) % 10 + 48; // 产生数字0-9的随机数
// getNum = Math.abs(rd.nextInt())%26 + 97;//产生字母a-z的随机数
char num1 = (char) getNum;
String dn = Character.toString(num1);
n += dn;
} while (n.length() < 8);
return n;
}
public static double distance(double lat1, double lon1, double lat2, double lon2) {
double theta = lon1 - lon2;
double dist =
Math.sin(deg2rad(lat1)) * Math.sin(deg2rad(lat2))
+ Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.cos(deg2rad(theta));
dist = Math.acos(dist);
dist = rad2deg(dist);
dist = dist * 60 * 1.85315962;
return (dist);
}
public static void list(
String search, int category, Integer size, Integer page, int firstPage, int lastPage) {
List<Ad> ads = null;
List<Category> cats = Category.find("categorytype_id=?1", "1").fetch();
EntityManager entityManager = play.db.jpa.JPA.em();
List<BigInteger> bCounts =
entityManager
.createNativeQuery(
"select count(*) as maxCount from Ad as a group by category_id order by maxCount")
.getResultList();
int min = bCounts.get(0).intValue();
int max = bCounts.get(bCounts.size() - 1).intValue();
bCounts =
entityManager
.createNativeQuery(
"select count(*) as maxCount from Ad as a group by category_id order by category_id ")
.getResultList();
List<String> fonts = new ArrayList<String>();
for (int i = 0; i < bCounts.size(); i++) {
BigInteger count = bCounts.get(i);
int x = Ads.getFontSize(count.intValue(), min, max);
fonts.add(String.valueOf(x));
}
int pagesCount = 0;
page = page != null ? page : 1;
if (search.trim().length() == 0) {
Long l = null;
if (category == 0) {
ads = Ad.find("order by createDate desc").fetch(page, size);
l = Ad.count();
} else {
ads = Ad.find(" category_id=?1 order by createDate desc", category).fetch(page, size);
l = Ad.count(" category_id=?1 ", category);
}
Long l2 = (l / 10);
if ((l % 10) > 0) l2 = (long) (Math.floor(l2) + 1);
pagesCount = Integer.valueOf(l2.intValue());
} else {
search = search.toLowerCase();
Long l = null;
if (category == 0) {
ads =
Ad.find(
"(lower(headline) like ?1 OR lower(description) like ?2)",
"%" + search + "%",
"%" + search + "%")
.fetch(page, size);
l =
Ad.count(
"(lower(headline) like ?1 OR lower(description) like ?2)",
"%" + search + "%",
"%" + search + "%");
} else {
ads =
Ad.find(
" category_id=?1 and (lower(headline) like ?2 OR lower(description) like ?3)",
category,
"%" + search + "%",
"%" + search + "%")
.fetch(page, size);
l =
Ad.count(
"category_id=?1 and (lower(headline) like ?2 OR lower(description) like ?3)",
category,
"%" + search + "%",
"%" + search + "%");
}
Long l2 = (l / 10);
if ((l % 10) > 0) l2 = (long) (Math.floor(l2) + 1);
pagesCount = Integer.valueOf(l2.intValue());
}
if ((lastPage - page) <= 2) {
firstPage = page - 2;
lastPage = page + 7;
if (lastPage > pagesCount) lastPage = pagesCount;
} else if ((page - firstPage) <= 2) {
firstPage = page - 7;
lastPage = page + 2;
if (firstPage < 1) {
firstPage = 1;
lastPage = 10;
}
}
if (lastPage > pagesCount) lastPage = pagesCount;
render(ads, search, size, page, pagesCount, firstPage, lastPage, cats, fonts);
}