anyone who has used oracle knows that the self-increasing id, of oracle is usually implemented by sequence. I only marked @ Id, on the entity and did not mark it to other additional comments. I thought there would be an error in save, but it actually ...
this is a question post with nothing to do, the problem encountered by the beginner of programming, there is no solution, I do not know which seniors have ideas, but also hope to give me some advice. is like this The project uses spring-data-jpa as ...
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...
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...
there is a set collection of tag classes in the user class; maintain relationships only from the user class, one-to-many @ OneToMany @JoinTable(name="shuo_tag", inverseJoinColumns=@JoinColumn(name="tag_id"), jo...
RT, in a 64-bit system, assuming that the actual memory is 3GB, what happens if the program requests 6GB memory and writes to the requested memory? ...
my front end has been developing with things related to Dcloud. Recently, a technical difficulty is related to Android background service. I want to turn APP into a rogue software. I would like to ask if you write the code of Android Source. How can I us...
the click event itself can be executed normally. Now the need to re-assign the html in the BODY as a string js will be invalid. ...
has a pop-up window but does not copy successfully < script type= "text javascript " > window.onload=function () { function test(){ var aux = document.createElement("input"); var content = test ; aux.setAttr...
problem description when installing the pcntl extension, there was an error when installing make, as shown in figure . ...