mysql database Save the code as follows: : ...
xml file related configuration and error prompt Cannot resolve symbol classpath:. : properties: the runtime environment is dependent on tomcat7, data validation: <dependency> <groupId>javax.validation< groupId> ...
the test case cannot roll back the data and is inserted directly into the database? applicationContext.xml <context:annotation-config>< context:annotation-config> <!--dataSource--> <bean id="dataSource" class="org...
seniors, use SpringJPA for the first time. Now the entity class has a field that looks like this: private String movie_id; and I want to sort through this field. After inheriting PagingAndSortingRepository, the code is: Sort sort = new Sort(...
session.save (c) converts instantaneous objects into persistent objects, but the c object does not have a primary key. A primary key generation strategy is configured in the configuration file. When native, executes session.save (c), an insert statement...
Hibernate lazily loads the acquired entity class, which has been handled by javaassit. Now there is no time to study javaassit, wants to know how to get the original Class, of the entity class and the original attribute of the entity class and the Class ...
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< H2 > description: < H2 > there are 19 pieces of data in total. When using PageRequest.of (page, limit) for paging query, as long as the limit parameter is greater than 19, it is found to be empty. less than 19:00, function is normal. < H2 > Test C...
one class @Entity public class Shuo{ @Id @GeneratedValue private int id; private String title; private Date date; String content; @ManyToOne(cascade = CascadeType.REFRESH) @JoinColumn(name = "user_id") private User user; : @OneT...
cascading deletions are actually performed but in practice, it is this kind of pseudo deletion that creates flag and assigns 0,1 . is there a callback method that can handle the logic of deletion? Only in this way can we write custom delete logic h...
https: github.com thymeleaf . I use jpa, to cascade the two classes through annotations. in the html page, when you get the object of any class through the thymeleaf tag, it will appear . java.lang.StackOverflowError: null at sun.reflect.misc.Refl...
1. Recently, when I was learning hibernate, a question suddenly occurred to me: can I use hibernate instead of a database to store data? Can it cooperate with hibernate with simple file access? 2. In order to answer this question, I think we should fi...
examples of using wrapper classes on the hibernate official website, public class PersonWrapper { private final Long id; private final String nickName; public PersonWrapper(Long id, String nickName) { this.id = id; this.n...
php preg_replace replacement code is as follows $_POST[ content ] = preg_replace( < s*img(.*) .preg_quote($value[ name ]). (.*)> iUs , <img src=" . $attach[ bigimg ] . " > , $_POST[ content ]); now there is...
What s the difference between vscode and its insiders version? is the vscode insider of the blue icon and the green icon because every time I open the blue vscode, the lower right corner always prompts me to use the vscode insiders version, so I ...
I plan to mount the project of the windows host in the virtual machine and try to access the files of the win host through the ubuntu server, which not only ensures the use of the linux server, but also facilitates editing the code; I create the site di...
$selectTip = $pdo->query("SELECT * FROM `tips_rate` WHERE `tip_id` = ".$row[ id ]." " ); $selecttotal = mysqli_num_rows($selectTip); $rate = $pdo->query("SELEC...
use golang to develop the gin framework for backend api,. Now every time you finish writing an interface, you need to run go build xxx to perform a compilation, then execute the compiled binary file, and then debug the interface. There is a problem in...