before using Spring, the interface has multiple implementation classes and uses xml to configure bean, so it is convenient to switch
. But it seems that SpringBoot recommends creating a new bunch of @ Configuration classes. What are the advantages of configuring Bean
in @ Bean way? Isn"t it troublesome to switch?
my own experience: third-party things are registered directly by bean, but generally in the form of xml, so I haven't used @ Bean
for my own implementation is usually in the form of annotations, but not @ Bean, but @ Component lets Spring scan and manage it. If there are multiple interfaces, the
annotations and xml that are switched with @ Qualifier ("name") have their own advantages and disadvantages. Look at the meaning of your team. Just unify
. I think they are all the same. The @ Bean method is more flexible. After all, it is java code
.Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder alipay.app_id in value "${alipay.app_id}" Project structure I wrote it in application.properties before it was not configured. I can get the value by using...
such as the title. such as the title. such as the title. ...
@Bean public HttpMessageConverters fastJsonHttpMessageConverters() { 1convert FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter(); 2fastjsonjson; FastJsonConfig fastJsonConfig = new Fast...
thymeleaf 2.+ requires < script th:inline= "javascript " > declare this Is there a better way after thymeleaf3? can the declaration be omitted? I read the document saying that it is recommended to remove . Template updates remove any th:inline= ...
when I actually use it, it s not what the documentation says. my thymeleaf version The code calls the tostring method of the class in this way <script> console.log([[${games}]]) < script> chorme console: an error will be prompted, b...
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...
and input parameters use @ RequestBody annotations ...
Spring boot uses jpa to operate MySQL InnoDB; for example: products; id; quantity; ; id=3211: I see the sql statement on the Internet is: SET AUTOCOMMIT=0; BEGIN WORK; SELECT quantity FROM products WHERE id=3 FOR UPDATE; UPDATE products SET quan...
[resolved] using filterChainDefinitionMap, in shiro such as page remove requires page:remove permission, but you can also access it as long as you access page remove , except for writing multiple ....
recently there are a lot of major updates to springboot2, so I m going to take a look at spring-webflux s use of the built-in netty container as a startup container. although I have just encountered some holes in my hands, I have seen the effect as ...
< H2 > problem description < H2 > in the process of using feign, turn on the circuit breaker by configuring feign.hystrix.enabled=true . However, the fallback will be executed directly after startup and will not determine whether the call was success...
how to use Fastjson, to only process the request message and not to process the return message, or to use the original processing method of SpringBoot? the code to add the Fastjson converter is as follows: @Bean public HttpMessageConverters f...
how is the traffic routing of ele.me double active project designed? API Router ...
configuration file of how application.yaml in SpringBoot is referenced. spring: datasource: druid: url: ${jdbc.url} username: ${jdbc.username} where jdbc.url , jdbc.username is in another file jdbc.yaml . how ...
< H2 > error < H2 > intellij web UserController UserMapper User jdbc pom.xml sql dao.UserMapper controller.UserController Demo10Application ...
Controller @RequestMapping(value = " test", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE}) public String test(User user) { return user.toString(); } @NoArgsConstructor @Data public class User { private String username; ...
< H2 > pol.xml < H2 > <build> <plugins> <plugin> <groupId>org.springframework.boot< groupId> <artifactId>spring-boot-maven-plugin< artifactId> <...
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 ...
...
the error is as follows ...