for example, I learned about the introduction to spring websocket through the following URL https: spring.io guides gs m. but guides only talks about broadcast websocket, but I want to know how to implement the peer-to-peer websocket function. Is th...
for example: what is the relationship and difference between MVC and web MVC, SpringMVC and Spring web MVC? ...
has an entity class with two attributes, startNum and endNum. so how to verify that startNum must be less than endNum? by javavalidation ...
...
< H2 > background < H2 > in order to be compatible with a variety of businesses, I want to use some design patterns in the project for ease of management. for example, I need to create a user and return userid,. Each business is created in a differen...
...
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> ...
wants to implement such a function through a custom interceptor: if the client requests that the file website img abc.jpg exists, it will be returned, if it does not exist, the file will be created and returned. May I ask how to achieve it? ...
as shown in the figure I created a route for a fan domain name. Parsing all requests directly opens the same vue single page; then parse the specific route through vue-router . due to the need to verify the login authorized by Wechat, all can ...
based on the framework of DUBBO,SSM and easyui, I wrote a function of uploading pictures, uploading and sharing music, and now I can t get that file tomcat in controller. <form id="upload_form" enctype="multipart form-data" ac...
am I full of question marks in Chinese when I integrate Springmvc and freemarker? this is an error screenshot Code presentation @ Bean public FreeMarkerConfigurer freeMarkerConfigurer () { FreeMarkerConfigurer configurer = new FreeMarkerConfig...
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; ...
recently I want to try a relatively simple development method. only writes sql statements in the xml file, and both incoming and outgoing parameters are map. Do something else in controller and service. then write a test code. this is the param, of...
encountered an awkward problem. My Springmvc can access static files through url, but there is no way to access jsp files under WEB-INF pages through url I wrote this sentence in my servlet-xml < mvc:resources mapping= " pages ** " location= " W...
divided into two parts, the first part, let s take a look at the error message , the second part, look at the code logic . part I: error message: GoShopping :: Entity DAO DAO Mapper in namespace in mapper, there is no such path as s...
how does java web automatically select databases? For example, automatically connect to localhost:3306, in the test environment and connect to the domain name in the formal environment: 3306? ...
try not to be serious, is the kind that the complexity of the foreground and background implementation is about the same, or the foreground implementation may be a little easier, are put in the background to implement I think it s better to ...
how should I open the index implementation on the home page of the website to query the relevant data from the background database and then bind it to the page? ...
select <include refid="Base_Column_List" > from sys_permission where id = -sharp{id,jdbcType=INTEGER} < select> < mapper> if you change dao to List < SysRole > getRoleWithPermission (Inte...
I don t understand; Why not all pass strings directly ...
javascritp advanced programming says that when an object is defined literally, the Object constructor is not actually called. So how was this object created? someone asked this question before, but I took a look at the answer. It s still in the clouds....
...
problem description as shown in the figure below, when thinkphp5 logs out, he always jumps to the interface that waits for 3 seconds. Is there any way to jump to the login interface without going through the waiting interface? the environmental bac...
< H1 > question < H1 > when registering models using the beego framework, an error is reported: panic: <orm.RegisterModel> cannot use non-ptr model struct `.` if you look at the description, you should pass in the pointer, but I passed the poi...
my Vue project is like this. My body is a routed page that can jump to many pages (eg: a, b, c component). header and footer both exist on the page when routing to different pages. there are some methods in my header , but when I body ro...