时间：2023-02-09 06:27:01 | 来源：建站知识
时间：2023-02-09 06:27:01 来源：建站知识
一.实现重定向
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1void sendRedirect(String var1) throws IOException;2.新建一个类，类名为：Redirectservlet。1protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {2 resp.sendRedirect("/Response/img");3}5.注册url，添加映射：1 <servlet>2 <servlet-name>Redirect</servlet-name>3 <servlet-class>com.gowork.servlet.Redirectservlet</servlet-class>4 </servlet>5 <servlet-mapping>6 <servlet-name>Redirect</servlet-name>7 <url-pattern>/red</url-pattern>8 </servlet-mapping>6.启动项目，访问localhost:8080/Response/red。1public class requesttext extends HttpServlet {2 @Override3 protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {4 System.out.println("现在已经进入这个请求了！");5 }6}如果我们进入过这个重定向页面就会输出：现在已经进入这个请求了。1<servlet>2 <servlet-name>newRedirect</servlet-name>3 <servlet-class>com.gowork.servlet.requesttext</servlet-class>4</servlet>5<servlet-mapping>6 <servlet-name>newRedirect</servlet-name>7 <url-pattern>/loign</url-pattern>8</servlet-mapping>如果我们访问/rednew，就会向后端的com.gowork.servlet.requesttext发出请求。1<!-- https://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->2<dependency>3 <groupId>javax.servlet.jsp</groupId>4 <artifactId>jsp-api</artifactId>5 <version>2.2.1-b03</version>6 <scope>provided</scope>7</dependency>我们进入pom.xml，导入上面的jsp。1String name =req.getParameter("username");2String pass =req.getParameter("password");34System.out.println(name+":"+pass);56resp.sendRedirect("");重定向要注意路径问题，否则容易404问题。关键词：原理,运用,实战
