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Servlet: packageorg.jimmy.testwebproject2019012602.servlet.download;importjava.io.FileInputStream;importjava.io.IOException;importjava.io.InputStream;importjavax.servlet.ServletException;importjavax.servlet.ServletOutputStream;importjavax.servlet.http.HttpServlet;importjavax.servlet.http.HttpServletRequest;importj...
importjava.io.File;importjava.io.IOException;importjava.io.PrintWriter;importjava.util.ArrayList;importjava.util.List;importjava.util.UUID;importjavax.servlet.ServletException;importjavax.servlet.http.HttpServlet;importjavax.servlet.http.HttpServletRequest;importjavax.servlet.http.HttpServletResponse;importnet....
Technologies Java SE Java SE Universal Subscription Java SE Embedded Jakarta EE 8 Java Card What's New in Java Learn more: The world's premier developer conference for the Java community Learn more: Introducing Java SE 24 Learn more about the OpenJDK Project ...
provided:表示依赖项由运行时环境提供,如在Java Web项目中,Servlet API由应用服务器提供,不需要打包到项目中。 依赖传递性:Maven的依赖管理具有传递性,即项目的直接依赖所依赖的库也会被自动引入。例如,项目A依赖于项目B,项目B又依赖于项目C,那么项目C也会被引入到项目A中。不过,在实际应用中,可能会因为依赖传递...
Java Technologies Java Servlet Technology Java Servlet technology provides Web developers with a simple, consistent mechanism for extending the functionality of a Web server and for accessing existing business systems. A servlet can almost be thought of as an applet that runs on the server side--wit...
Java Platform Enterprise Edition (Java EE), the standard in community-driven enterprise software, is developed using the Java Community Process.
The lifecycle of a servlet is controlled by the container in which the servlet has been deployed. When a request is mapped to a servlet, the container performs the following steps. If an instance of the servlet does not exist, the web container ...
The HttpServlet class provides methods, such as doGet and doPost, for handling HTTP-specific services.This chapter focuses on writing servlets that generate responses to HTTP requests. The Example ServletsThis chapter uses the Duke’s Bookstore application to illustrate the tasks involved in ...
public void download(String userName, String password, String fileId, HttpServletResponse httpServletResponse){ List userEntityList = userRepository.queryUserEntitiesByUserNameAndPassword(userName, password); if (userEntityList.size() == 0){ httpServletResponse.setStatus(401); return; } List fileEnt...