SpringMVC实现简单登录

超、凢脫俗 2022-05-25 13:37 260阅读 0赞

1.基本环境：eclipse+jdk1.8+Tomcat9.0+springmvc各种jar

2.把jar导入到lib下，在build path中添加这些jar

3.创建一个server，作为运行时用。

4.目录如下：

70

index.jsp

  1. <%@ page language="java" contentType="text/html; charset=utf-8"
  2.     pageEncoding="utf-8"%>
  3. <!DOCTYPE html>
  4. <html>
  5. <head>
  6. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  7. <title>Insert title here</title>
  8. </head>
  9. <body>
  10.     <form action="login.do" method="post">
  11.         <label>用户名：</label><input type="text" name="username"/><br>
  12.         <label>密码：</label><input type="password" name="password"/><br>
  13.         <input type="submit" value="提交"/>
  14.     </form>
  15. </body>
  16. </html>

succ.jsp

  1. <%@ page language="java" contentType="text/html; charset=utf-8"
  2.     pageEncoding="utf-8"%>
  3. <!DOCTYPE html>
  4. <html>
  5. <head>
  6. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  7. <title>成功</title>
  8. </head>
  9. <body>
  10.     <div>
  11.      <%
  12.          String name = (String)request.getAttribute("username");
  13.         String pwd = (String)request.getAttribute("password");
  14.      %>
  15.         <p>用户名：<%=name %></p>
  16.         <p>密码：<%=pwd %></p>
  17.     </div>
  18. </body>
  19. </html>

applicationContext.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
  4.     xmlns:context="http://www.springframework.org/schema/context"
  5.     xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
  6.     xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
  7.         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
  8.         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
  9.         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
  10.         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
  11. </beans>

springmvc.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
  4.     xmlns:mvc="http://www.springframework.org/schema/mvc"
  5.     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
  6.         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
  7.         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
  8.   <!-- 启用spring mvc注解 -->
  9.     <context:component-scan base-package="com.chunyan.spring"></context:component-scan>
  10.     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  11.         <property name="prefix" value="/"></property>
  12.         <property name="suffix" value=".jsp"></property>
  13.     </bean> 
  14. <!--  在名为'springmvc'的DispatcherServlet中找不到具有URI [/ThirdPage/login.do]的HTTP请求的映射 -->
  16.     <!-- 在实际开发中通常都需配置 mvc:annotation-driven 标签 -->
  17.      <mvc:annotation-driven></mvc:annotation-driven>  
  18. </beans>

web.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  3.   <display-name>ThirdPage</display-name>
  4.   <welcome-file-list>
  5.     <welcome-file>index.jsp</welcome-file>
  6.   </welcome-file-list>
  8.   <listener>
  9.     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>      
  10.   </listener>
  12.   <context-param>
  13.         <param-name>contextConfigLocation</param-name>
  14.         <param-value>classpath*:applicationContext.xml</param-value>
  15.   </context-param>
  17.   <servlet>
  18.       <servlet-name>springmvc</servlet-name>
  19.       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  20.       <init-param>
  21.           <param-name>contextConfigLocation</param-name>
  22.           <param-value>/WEB-INF/classes/springmvc.xml</param-value>
  23.       </init-param>
  24.       <load-on-startup>1</load-on-startup>
  25.   </servlet>
  27.   <servlet-mapping>
  28.        <servlet-name>springmvc</servlet-name>
  29.         <url-pattern>*.do</url-pattern>
  30.   </servlet-mapping>
  31. </web-app>

Usercontroller.java

  1. package com.chunyan.spring;
  3. import javax.servlet.http.HttpServletRequest;
  5. import org.springframework.stereotype.Controller;
  6. import org.springframework.web.bind.annotation.RequestMapping;
  7. @Controller
  8. public class UserController{
  9.     @RequestMapping("/login")
  10.     public String login(String username, String password, HttpServletRequest request) {
  11.         System.out.println("用户名："+username+"\t密码："+password); 
  12.         request.setAttribute("username", username);
  13.         request.setAttribute("password", password);
  15.         return "succ";
  16.     }
  17. }

运行结果：

70 1

70 2

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