java learning path pluralsight

to set the number of bulk searches for a deferred retrieval policy or an immediate retrieval policy. Bulk retrieval can reduce the number of SELECT statements and improve the performance of deferred or immediate retrieval operations.　　　　4. Multiple-to-one and single-to-a-link retrieval strategies1) As with 　　2) If the Fetch attribute is set to join, then the Lazy property is ignored 3) The advantage of an urgent left outer connection retrieval strategy is that fewer SELECT statements are used

hibernate.jdbc.batch_size: Sets the batch size for bulk delete , batch update and BULK INSERT, similar to the meaning of setting buffer size. The larger the batchsize, the lower the number of times a batch operation sends SQL to the database, the faster it becomes. 2 test result is that when batch size=0, using hibernate to delete 10,000 records for Oracle database takes 25 seconds, Batch Size = 50, delete only need 5 seconds! Oracle Database batchsize=30 is the right time . 　　　　 　　　 1 invali

(I am writing in the same Applicationcontext.xml file, but it does not affect the test function) Now let's write the test code, deploy the project to tomcat before running the code below, and run the Tomcat1 package test; 2 Import java.util.List; 3 Import Org.springframework.context.ApplicationContext; 4 Import Org.springframework.context.support.ClassPathXmlApplicationContext; 5 Import Service. Bookservice; 6 Import entity. Book; 7 public class Test {8 public static void Main (string[]

Java learning path-Burlap LearningToday, let's learn about Burlap. Burlap is an XML-based Remote Call technology, but unlike other XML-based remote technologies (such as SOAP or XML-RPC), Burlap's message structure is as simple as possible, no additional external Definition Language (such as WSDL or IDL) is required ). Burlap and Hessian are the same to a large e

achieve platform independence. In different machines, just call multithreaded code exactly the same, Java to the implementation of multi-threaded to the bottom of the operating system or line libraries to complete, however, the simplicity of multithreaded compilation is the Java becomes attractive server-side development language of the main reason.11) PolymorphismAllows programmers to know the structure a

, execute. r--Read only, can be deleted to see the permissions of the directory;Directory permissions: R-List PermissionsW Create delete file or directoryx whether to enter the directory10. Cat display text file contents(1) Cat file(2)-N Display line number11, TAC reverse display text file content, contrary to cat command12, more paging view files(1) More files(2) blank page, carriage return line down; CTRL + C or Q cancel13, less paging display, you can page forward(1) Less files(2) PageUp up t

; - > Interceptor-refname= "Defaultstack">Interceptor-ref> result>/success.jspresult> Action> Package>Struts>Tokenaction.java1 PackageCom.jason.upload.app;2 3 ImportCom.opensymphony.xwork2.ActionSupport;4 5 Public classTokenactionextendsActionsupport {6 7 /**8 * @Fields: Serialversionuid9 */Ten Private Static Final LongSerialversionuid = 1L; One A PrivateString UserName; - - PublicString GetUserName ()

Intercept (actioninvocation invocation)throwsException { -System.out.println ("Before Invovation.invoke ... "); -String result =Invocation.invoke (); +System.out.println ("After Invovation.invoke ... "); - + returnresult; A } at -}Struts.xml Configuring custom interceptors and using interceptorsXML version= "1.0" encoding= "UTF-8"?>DOCTYPE struts Public "-//apache software foundation//dtd struts Configuration 2.3//en" "Http://struts.apache.or G/dtds/struts-2.3.dtd ">Struts

Java learning path-Spring's HttpInvoker LearningHessian and Burlap are both based on HTTP, and both of them solve the firewall penetration problem caused by RMI. However, when the passed RPC message contains a serialized object, RMI wins Hessian and Burlap. Hessian and Burlap both adopt private serialization mechanisms, while RMI uses

table.-css_xhtml: the templates in this topic are similar to the templates in XHTML themes, but they will be used for layout and typesetting using CSS-ajax: the template in this topic is based on the XHTML theme of the German template, but adds some Ajax features.　　2. Modify the Theme:-through the UI Tag's theme Property-in a form, if the theme property of a UI tag is not given, it will use the theme of this form-add a Theme property in page, request, session, or application-modify the Struts.u

little bit more than C + +, for example: int i = f ();int F () {return 11;}? The function f () is required to be declared in C + +, but it is not required in Java.And the following code:1 Public classtest{2 3 inti = g (j);//Illegal forward reference4 5 intj =f ();6 7 intGinti) {8 9 return2 *i;?Ten One }? A - inti =f (); - the intF () {return11;} - -}?It's not working in

(^): Same as false. The difference is true;or (|): As long as one is true;With (): As long as there is a false is the false;Three mesh operator: judgment statement? "For true execution", "for false execution";Calculation operators Operator Description + 、—、 *,/,%, =, + + 、-- Basic operators 12>>3 Move right 3 times, equivalent to 12/2 of the 3-time Square 3 Move left 3 times, equivalent to 3*2 3-time A+=b

Simple Java Class Development general principles: The name of the class must be meaningful, and then how to say, let people see it. All properties within a class must use private encapsulation and provide the Setter,getter method There can be more than one construction method in a class, but you must keep a parameterless construction method No output statements are allowed in the class, all outputs must be given to the Class r

choice."In Tyr1235831 's masterpiece, he mentions:": LZ Research Two dog, looking for a job next year, see brother and sister looking for work so painful, I also began to examine themselves, to prepare early.: But LZ technical slag, in the laboratory only one Web project a year, and feel some do not take the kind of shot. In fact, the LZ Lab project is completely unrelated to the web, but just to be assigned to this task, it is done, and basically is to take the former things changed.: So make

, which can be accessed within the same package Protected This class, subclass, and package can be accessed Inheritance: extends (keywords)Cast: instanceceof (keyword)Final: The final modification cannot be changed, cannot be inherited, cannot be rewritten;Abstract class:Modified with abstract;cannot be instantiated directly;Abstract method is used to modify the method.Abstract classes are generally used as parent classes of other classes, but must be rewritten;Can

throughout the class. The member variables of a class are also classified as static variables (class variables) and instance variables.If you precede the type of a member variable with the keyword static, such a member variable is called a static variable. The valid range of static variables can span classes, even within the entire program. int x=10; static int y=10; Here x is an instance variable and y is a static variable.Local variables: Variables defined in the method body of a class, loc

Java: the path from basic to advanced learning-creation of Sudoku games (1), java advancedPreface Most people have played this game, so the specific game itself is not described. See Baidu Encyclopedia: http://baike.baidu.com/subview/961/10842669.htmRules and objectives The rule of DT independence is simple, that is, d

For Yesterday Java Learning Road (a)--thinking in Java static method of the class can not be accessed to create a non-static class, the internal class is modified to be static class, easy to operate. Now gives you a second, highly efficient way to add no deletions. You can copy and paste an inner class from a class you create into a class, and as an external clas

If this class can be cloned, the next step is the clone method: Public Objectclone () nbsp { try{ countersetobj= (CounterSet) super.clone (); obj.packets= (int[]) packets.clone (); Obj.size=size; Returnobj; }catch (clonenotsupportedexceptione) { Thrownewinternalerror ("Unexpected clonenotsupportedexception: "+e.getmessage ()); } } class method The method to begin writing the class: /** *setthe Packetcounters * (suchaswhenrestoringfromadatabase) */ Protectedfin

the variable name arr in the stack area, new int[5] in the heap area, open up 5 contiguous space in the heap area, the default int is 0When we re-assign arr to a new variable, it just gives the new variable the memory address. static initialization of arrays Dynamic initialization: int[] arr = new Int[5]Static initialization:Format: data type [] Array name = new data type []{element ...}Simplification: data type [] Array name = {element ...} traversal of an array If it's