1导入servlet需要的jar包
<dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency>
2新建servlet,继承HttpServlet并实现里面的方法
package controller; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class UserController extends HttpServlet{ private static final long serialVersionUID = 1L; @Override public void init() throws ServletException { super.init(); } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String name=req.getParameter("account"); String password=req.getParameter("password"); ServletOutputStream out=resp.getOutputStream(); out.print("name"+name+"password"+password); } }
3在web.xml里面配置servlet(此时就可以在浏览器里面访问到方法了,/example/user)
<servlet> <!-- servlet的内部名称,自定义。尽量有意义 --> <servlet-name>User</servlet-name> <!-- servlet的类全名: 包名+简单类名 --> <servlet-class>controller.UserController</servlet-class> </servlet> <servlet-mapping> <!-- servlet的内部名称,一定要和上面的内部名称保持一致!! --> <servlet-name>User</servlet-name> <!-- servlet的映射路径(访问servlet的名称) --> <url-pattern>/user</url-pattern> </servlet-mapping>
4jsp请求方法(这里的路径可以为user也可以为/example/user,但不可以为/user或example/user)
<body> <form action="user"> 账号:<input type="text" name="account"> 密码:<input type="password" name="password"> <input type="submit"> </form> </body>