標籤:單向OneToMany一個使用者有多張照片,User----->Images是一對多關聯性,在資料庫中Images維護一個外鍵useid1、在映射關係的主控方Image這邊,我們什麼都不做。(為什麼說Images是主控方呢?因為外鍵又Images維護)2、在映射關係的被控方User這邊,需要添加@OneToMany、@JoinColumn註解public class
標籤:一、使用base標籤,使相對路徑和絕對路徑可以同時使用但是,base標籤對Ie低版本不相容(IE8及IE8以下)不過,鑒於IE在國內具有無與倫比的統治地位,所以,換了個寫法:<script type="text/javascript">//解決IE對base不能很好支援的問題var base = document.getElementsByTagName("base")[0].getAttribute("href");window.location
LeetCode,leetcodeoj題目描述:Given a non-negative integer num, repeatedly add all its digits until the result has only one digit.For example:Given num = 38, the process is like: 3 + 8 = 11, 1 + 1 = 2. Since 2 has only one digit, return
LeetCode,leetcodeoj題目描述:Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the length is 3. For "
hdu5443 The Water Problem(長春網路賽),hdu5443長春The Water ProblemTime Limit: 1500/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 207 Accepted Submission(s): 166Problem DescriptionIn Land waterless, water is a very
leetcode筆記:Set Matrix Zeroes,leetcodezeroes 一.題目描述Given a m*n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Follow up: Did you use extra space? A straight forward solution using O(mn) space is probably a bad