samsung study notes 4

1. How to judge the session is about to expire! . 5
2. spring_security3.2 detailed configuration of the training note
http://wenku.baidu.com/link?url=UFfTJ3fXKAIJd1sqcYtKpF2qBjgv-bncgpkXCxFpI5Lz8JxEjvnS1LNgWOfsYH3fG9g288sIBGOxDE9ToT8cinTGdIeN0ToWCbv_3a4YbmW

3. decimal number into binary
Integer.toString (88, 2); .

4 digit string Convert to decimal number
Long.parseLong("100000000000000001011", 2); or Integer.parseInt("1011", 2);

5. spring security 3 extends HttpSessionEventPublisher to count online users
6. The difference between Java Vector and ArrayList
7. Several The difference between Context
8. java interview question 3: the role and difference between BeanFactory and ApplicationContext in spring?
9. Difference between Thread.currentThread().getContextClassLoader() and Class.getClassLoader()
10. Basic principles of log4j 11. Log4j

configure category, appender, layout
http://www.360doc.com/content/13/0110/10/6161903_259299022.shtml
12. Why use abstract classes to implement interfaces in Java
Abstract classes are just classes used to define public properties and public methods.
13. The difference between getRequestURI and getRequestURL (transfer)
14.jstl fmt
http://spaceflysky-163-com.iteye.com/blog/241238
15. JSTL (fn function)
16. jstl <c:url> tag
http:/ /www.yiibai.com/jstl/jstl_core_url_tag.html
17. The usage of response.encodeURL
18. Spring Security3 - MVC integration tutorial (first understanding of Spring Security3)
19. The values ​​that can be obtained by the System.getProperty() method of java

19. Java The usage of enum is explained in detail
20. "Java Virtual Machine Principle Diagram" 1.2, the constant pool in the class file
21. What is the difference between Unicode-BE and Unicode-LE?
http://zhidao.baidu.com/link?url=b4qebzdKg9ihwDoxj1JaMDpVqd5g2Bm9nXpnFhQrDTTZU7s1CQNbkIXIvc9MiBi_vwtA5rKS3X4cXEOuGGnVcz4RguZkcuDO7ZAzVIgBvZq

22 is the HTTP request and response process distinguish the HTTPS
http://www.linuxidc.com/Linux/2015-08/121197.htm

23. A comes with the Java class encryption MessageDigest class (encrypted MD5 and SHA)

23. @RequestParam @RequestBody @PathVariable and other parameter binding annotations
24. Error setting null for parameter #10 with JdbcType OTHER .
25. Mybatis/Ibatis, the return value of database operations
26. ModelAndView details
27. How to clean the project in Eclipse and the role of clean
28. Spring internationalization--read messageSource from the database
springMVC <spring:message> internationalization
29. Spring: source code interpretation Spring IOC principle
30. POI&JXL usage and difference
31. javax. servlet (Servlet API Documentation)
32. Upload and download of Spring mvc files

33. Oracle left join, right join, full outer join, (+) sign function

34. The difference between regular expression ^$ plus and no plus:
all plus, match all, without adding can match the substring
"abcde". replae(/[az]/,”P”)Pbcde
“abcde”.replae(/^[az]$/,”P”) abcde
34. [Spring MVC] - Read MessageSource from database
35．Oracle uses the escape keyword to achieve like matching special characters, and the escape of & characters

36. SQL primary key and foreign key constraints
37. Detailed explanation of Oracle cascade operation
38. StringUtils official website api
http://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/StringUtils.html

39. The difference between oracle, mysql, and sqlserver functions
40. Oracle index details
41. Use oracle keywords as table fields to create a new table
42. Detailed explanation of ORACLE triggers
43. Difference between SQL truncate, delete and drop
44. oracle_plsql_ programming details
45. Talking about WebLogic and Tomcat
46. What is EJB, is it really that mysterious?
47．Detailed steps to configure WebLogic
48．The construction of eclipse integrated weblogic development environment