原创 ORA-04062 timestamp of procedure '''xxxx' has changed
P_XX失敗!ORA-04062: timestamp of procedure "A" has been changed. 原因是P_XX中調用了存過A,但是P_XX編譯後,A又被修改了,所以A修改後要重新編譯P_XX。
原创 oracle的循環
在存儲過程中, BEGIN FOR REC IN(SELECT * FROM table_name) LOOP SQL_TEXT:='INSERT INTO table_name (column1
原创 點擊頭像更換頭像
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <!--引進jquery,script纔有
原创 後臺doc轉pdf文件
最近做一個投稿系統,投稿之後要將.doc文件轉換成.pdf文件,經過查找資料,過程如下: 後臺: @PostMapping(value = "/auTouSubmit") public String auTouSubmit(@M
原创 springboot集成themeleaf問題
Deprecated configuration property 'spring.thymeleaf.content-type' spring.thymeleaf.content-type=text/html已過時, 改成: s
原创 Servlet.service() for servlet [dispatcherServlet] in context with path [/shdemo] threw exception
controller層: @RequestMapping(value = "/hello",method = RequestMethod.GET) public ModelAndView sayHi(){ ret
原创 The origin server did not find ...原始服務器沒有找到目標資源的當前表示
出現404,並且報錯信息爲: The origin server did not find a current representation for the target resource or is not willing to dis
原创 mysql 笛卡爾乘積 + 左右連接+全連接
部分來源於https://blog.csdn.net/u013272574/article/details/87916669 用於測試的有兩張表表,student(id,name,psd),grade(stu_id,score) 1.
原创 循環
在存儲過程中, BEGIN FOR REC IN(SELECT * FROM table_name) LOOP SQL_TEXT:='INSERT INTO table_name (column1
原创 where exists(select 1 from...)與where a.id=b.id的區別
測試表有student(id,name,psd),grade(stu_id,score) SELECT * FROM student a,grade b WHERE a.`id`=b.`stu_id` 等價於 SELECT * F
原创 配置QQ郵件客戶端,後臺處理髮送郵件
1.首先獲取QQ郵箱授權碼 開啓POP3服務 https://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256 2.在.yml文件中配置 mail:
原创 springboot + thymeleaf連接表達式,多參數
單參數 <a href="xx.html" th:href="@{/user/details(id=${user.id})}" th:text="${user.name}"></a> 結果:<a target="_blank" hr
原创 springboot+jpa+thymeleaf 按條件分頁
1.添加依賴,pom.xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="ht
原创 前端出現的問題
1.讓子div的寬度一直和父div的寬度保持一致 -webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;