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When we use Spring MVC, we must know that for security reasons, our JSP files will be placed under WEB-INF. But we don't have direct access to resources in / WEB-INF / directory outside, do we? Access can only be carried out through internal server in the form of forwarding, so the bottom of the Internal ResourceViewResolver can help us solve ...

Interceptor== (emphasis)== 1. Overview of custom interceptors Spring MVC can also use interceptors to intercept requests. Users can customize interceptors to achieve specific functions. Customized interceptors can implement Handler Interceptor in ...

About org.springframework.web.HttpMediaTypeNotSupportedException: Content type'application/x-www-form-urlencoded;charset=UTF-8'not supported and Could not read document: Unrecognized token': was expecting ('true','false'or'null') exception resoluti ...

The actual behavior of the Tomcat server: Because: Enter in the browser's address bar: localhost:8080/ProjectName / resource path Where the resource path: It's the resource path in @WebServlet("/demo3") 1. Through this path, the class poi ...

##Template Engine In addition to JSP, SpringBoot also provides many other template engines, such as freemarker, thymeleaf, and so on. JSP is officially not recommended for SpringBoot, and Thymeleaf is the view layer technology recommended for Sprin ...

I. Brief Introduction Filter in Servlet is a server-side program that implements javax.servlet.Filter interface. Its main purpose is to filter character encoding and make some business logic judgments, such as access to pages. Its working principle is that as long as you configure the web.xml file to intercept client requests, it will help you ...

Recently, I learned the javaweb link and implemented a user management system following the teacher's teaching steps. No more bb, just start. First step: database design For the time being, the system only uses one user table, which is equivale ...

request object request object is mainly used to receive data transmitted from client to server through HTTP protocol link. The main method of request is to deal with the parameters and options in the request submitted by the client browser. Partial methods: object getAttribute(String name) //Returns ...

1. Receiving request parameters through entity bean s For get and post submission requests, it is important to note that the bean's attribute name must be the same as the request parameter name. Example: We submit a form on register.jsp page. There are three submissions: uname, upass, urepass, that ...

Spring MVC provides us with a unified exception handling mechanism in the following four ways. It's important to note that if we want to use a unified exception handling mechanism, then we don't have to try the exception that needs unified processing. catch... Instead, it is handled uniformly by excepti ...