pmp study notes

[Struts2 Study Notes (11)] perform input validation on all the methods of action based on the input validation and XML configuration method of action. struts2 Study Notes In struts2, we can verify all the methods of the action or the specified method of the action. Two input verification methods are provided for stru

[Struts2 Study Notes (10)] custom interceptor management permission access, struts2 Study Notes (1) The functions of the interceptor are not directly mentioned in the Code: To customize the Interceptor, you must implement the com. opensymphony. xwork2.interceptor. Interceptor interface: The following is a custom Interc

Java Study Notes 12, java Study Notes The Object class is the parent class of all classes, arrays, and enumeration classes. It is the root class of the class hierarchy. Each class uses an Object as a superclass. All objects (including Array. The Object class implements the following methods: Let's take a look at the

Java Study Notes 10, java Study Notes When a program creates objects, arrays, and other reference objects, the system allocates a memory area for them in the heap memory, and the objects are stored in the memory area, When the object we create is no longer referenced, the memory will become garbage, and finally wait f

SCALA Study Notes (1), SCALA Study Notes (Variable When obtaining the variable value is time-consuming, you can use lazy var.Lazy val forLater = someTimeConsumingOperation () Scala> val first: rest = List (1, 2, 3)First: Int = 1Rest: List [Int] = List (2, 3)Function Definition "=" Is not just used to separate the func

SecureCRT simple settings (Study Notes 2), securecrt Study Notes Cainiao records.I. Change the terminal type Option-global option-default session-edit default settings-terminal-simulation-select type on the right side, and set the buffer size below 2. Set the font and appearance Upper window appearance-Right side s

Linux Study Notes (14) file system management and linux Study Notes1. Review partition and System (1) Partition types Linux partitions generally include primary partitions, extended partitions, and logical partitions. Where: A maximum of four primary partitions can be created; There can be only one extended partition, or one of the primary partitions, that is, th

[Swift] study notes (8)-class and structure, swift Study Notes 1. Definition of classes and struct Class: keyword class, struct: struct 2. Create instances of classes and struct (Instances in other languages are called objects .) let someResolution = Resolution()let someVideoMode = VideoMode() Isn't that easy? W

Mongodb Study Notes 07: mongodb Study Notes Export export in json or csv format Using import to import json or csv Mongodump exports binary bson structure data and index information Mongorestore imports binary files Mongoexport -H host -- port number-u user name-p password-d database name-c table name-f field1,

[Struts2 Study Notes] Section 5: Compile the struts2 action Code and struts2 Study Notes Address: http://blog.csdn.net/sushengmiyan/article/details/40479299 Official documents: http://struts.apache.org/release/2.3.x/docs/coding-struts-2-actions.html Author: sushengmiyan Certificate -------------------------------------

[Study Notes] JavaScript coding specification-type, Study Notes javascript Type Basic Type: when accessing the basic type, the type value should be operated directly. String number boolean null undefined Var a = 0; var B = a; B = 8; console. log (a, B); // 0, 8 Note: 1. Call the console in JavaScript

CUBRID Study Notes 17 transaction rollback, cubrid Study Notes Syntax: ROLLBACK [WORK] The following statement will report an error Alter table code DROP s_name; Insert into code (s_name, f_name) VALUES ('D', 'Diamond '); ERROR: s_name is not defined. Roll back to repair broken wounds Rollback work; Come back Alter t

Html Study Notes 3: html Study Notes Image Tag img Generally, the image is placed in the compiler, the Directory of the current project. Image map: map For example, if a map is located at a certain location, the map is directed to the local XX website. Application: select a part of the current image for Link How

Study Notes for Linux _ Day4 and Study Notes _ day4 The fourth day, continue learning. Today, I saw a saying, "What do you think is what you think? ", This sentence is a bit interesting !!! 1. Command for viewing File Content File dest: view the file type. In Linux, file types include text files, directories, linked fi

Swift 2.0 Study Notes (Day 13)-integer and floating-point data types, swift Study Notes For Original Articles, please reprint them. Reprinted Please note: Guan Dongsheng's blog Swift provides 8, 16, 32, and 64-Bit Signed and unsigned integers. These integer types follow the naming conventions of the C language. I have

Swift 2.0 Study Notes (Day 11)-What about data types ?, Swift Study Notes For Original Articles, please reprint them. Reprinted Please note: Guan Dongsheng's blog When we learn a language, we will learn the Data Type of this language. What types of data are available in Swift? Integer, floating point, Boolean, charact

GUN make study notes in linux (1) and gun Study Notes Chapter 1: Overview 1.1: make Overview In a linux environment, you can easily build your own project using the make tool. The compilation of the entire project requires only one command to complete the compilation, connection, and final execution. However, we need t

Linux Study Notes (12) user and user group management, linux Study Notes The more servers that require higher server security, the more users need to establish a reasonable user permission Level System and server operation specifications. In Linux, the user configuration file is used to view and modify user information

MySQL Study Notes (1), mysql Study NotesPreface Note content is based on the database course of the lab building. If you are interested, you can click it to learn it. It should be a note, so the content may be simple and incomplete. Because note content is mainly for your own learning. 1. MySQL Introduction MySQL is a relational database management system d

Less Study Notes and Study Notes Note in less: Variable: HYBRID: Matching mode: Operation: The operation provides addition, subtraction, multiplication, and Division operations. We can perform operations on attribute values and colors to implement the complex relationship between attribute values. Nested rules: