servlet入門
阿新 • • 發佈:2020-08-28
import javax.servlet.*; import java.io.IOException; /* 一、javaweb動態資源目錄結構 * WEB-INF - classes:存放位元組碼檔案 - lib:存放jar包 - web.xml:web專案核心配置檔案 二、訪問動態資源的步驟 1、資源地址:http://localhost:8080/A01javaweb_war_exploded/first * http://localhost:8080:找到伺服器 * /A01javaweb_war_exploded(虛擬目錄):找到專案 * /first(資源名稱):找到資源 2、web.xml:對映關係 <servlet> <servlet-name>first</servlet-name> <servlet-class>FirstServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>first</servlet-name> <url-pattern>/first</url-pattern> </servlet-mapping> 3、Servlet:實現介面,由tomcat建立物件並呼叫service方法*/ public class FirstServlet implements Servlet { @Override public void init(ServletConfig servletConfig) throws ServletException { } @Override public ServletConfig getServletConfig() { return null; } @Override public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException { System.out.println("執行service方法"); } @Override public String getServletInfo() { return null; } @Override public void destroy() { } }