标签:总结 web 登录 Spring springframework spring org 第四次
一、基于XML配置与注解的方式使用Spring MVC
1、创建名为SpringMVCDemo01的Spring项目
2、在pom文件里添加依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>net.lxt.spring</groupId>
<artifactId>SpringMVCDemo01</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<!-- spring.version -->
<spring.version>5.3.4</spring.version>
</properties>
<dependencies>
<!--Spring核心-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<!--Spring Bean-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<!--Spring容器-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!--Spring测试-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--Spring Web-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<!--Spring MVC-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--JSP标准标签库-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<!--日志框架-->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!--单元测试-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13</version>
<scope>test</scope>
</dependency>
<!--对json的支持-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.7</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.7</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.7</version>
</dependency>
<!--对xml的支持-->
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
<version>2.5.3</version>
</dependency>
</dependencies>
</project>
3、给项目添加web功能,打开Project Structure窗口,点击Modules选项卡,选中SpringMVCDemo01,点击左上角的“+”,选择“web”
点击“OK”按钮,可以看到项目对了一个web目录
4、在WEB-INF里创建views子目录
1)创建login.jsp登录页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>用户登录</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" >
</head>
<body>
<h3 style="text-align: center">用户登录</h3>
<form id="frmLogin" action="login" method="post">
<table class="tb" border="1" cellpadding="10" style="margin: 0px auto">
<tr>
<td align="center">账号</td>
<td><input id="username" type="text" name="username"/></td>
</tr>
<tr>
<td align="center">密码</td>
<td><input id="password" type="password" name="password"/></td>
</tr>
<tr align="center">
<td colspan="2">
<input type="submit" value="登录"/>
<input type="reset" value="重置"/>
</td>
</tr>
</table>
</form>
<script src="js/check.js"/>
</body>
</html>
2)创建success.jsp登录成功页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>登录成功</title>
</head>
<body>
<h1>${username},登录成功!</h1>
</body>
</html>
3)创建failure.jsp登录失败页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>登录失败</title>
</head>
<body>
<h1>${username},登录失败!</h1>
</body>
</html>
5、创建net.lxt.spring.controller子包,然后在包里创建LoginController类
package net.lxt.spring.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import javax.servlet.http.HttpSession;
@Controller
public class LoginController {
@RequestMapping("/login")
public String login(@RequestParam("username") String username, @RequestParam("password") String password, HttpSession session){
//将从登陆表单获取的用户名写入会话
session.setAttribute("username",username);
//判断用户是否登录成功
if(username.equals("admin") && password.equals("12345")){
//跳转到成功页面
return "success";
}else{
//跳转到失败页面
return "failure";
}
}
@RequestMapping("/")
public String index(){
//返回逻辑视图名
return "index";
}
@RequestMapping("/toLogin")
public String toLogin(){
return "login";
}
}
6、在resources里创建mvc子目录,然后在子目录里创建spring-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
<!--组件扫描-->
<context:component-scan base-package="net.lxt.spring"/>
</beans>
7、在resources/mvc目录里创建spring-mvc-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
<!--采用注解驱动-->
<mvc:annotation-driven/>
<!--扫描控制器-->
<context:component-scan base-package="net.lxt.spring.controller"/>
<!--定义内部资源视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--定义视图控制器-->
<mvc:view-controller path="/" view-name="index"/>
<mvc:view-controller path="/toLogin" view-name="login"/>
<!--处理静态资源的请求-->
<mvc:resources mapping="/images/**" location="/WEB-INF/images/"/>
<mvc:resources mapping="/css/**" location="/WEB-INF/css/"/>
<mvc:resources mapping="/js/**" location="/WEB-INF/js/"/>
</beans>
8、在web.xml里加载Spring配置文件与Spring MVC配置文件。
在web/WEB-INF目录里打开web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!--设置启动首页-->
<welcome-file-list>
<welcome-file>/WEB-INF/views/login.jsp</welcome-file>
</welcome-file-list>
<!--Spring容器加载监听器,让Spring随着Web项目启动而初始化-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--指定Spring配置文件位置-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:mvc/spring-config.xml</param-value>
</context-param>
<!--配置Spring前段控制器,加载Spring MVC配置文件-->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:mvc/spring-mvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern> <!--“/”表明拦截一切请求-->
</servlet-mapping>
<!--设置字符编码过滤器-->
<filter>
<filter-name>Character Encoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Character Encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
9、配置Tomcat服务器
单击工具栏上的【Add Configuration】,弹出【Run/Debug Configurations】窗口
对服务器进行配置
点击【fix】按钮,然后点击【OK】
10、添加项目对Tomcat的依赖
打开【Project Structure】窗口,单击【Dependencies】选项卡
单击【+】按钮,选择【Library】
然后选择Tomcat 8.5.58,点击Add Select按钮,再单击【OK】按钮。
11、配置Artifacts,添加项目正常运行所需的jar包,在WEB-INF下新建一个lib子目录
选在项目依赖的全部jar包,单击右键,选择【Put into /WEB-INF/lib】,点击【OK】按钮
12、运行服务器
二、实战练习
1、修改web.xml文件,注释掉“设置启动首页”元素
2、在views目录里创建首页文件index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>首页</title>
</head>
<body>
<h1>Hello, Spring MVC World!</h1>
</body>
</html>
3、修改登录控制器 - LoginController
查看效果
4、修改首页文件 - index.jsp
<%--
Created by IntelliJ IDEA.
User: DELL
Date: 2021/4/21
Time: 10:13
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
<link rel="stylesheet" href="css/index.css">
</head>
<body>
<h1>Hello,Spring MVC World!</h1>
<a href="toLogin">跳转到登录页面</a><br>
<img src="images/two.png" width="300" height="250"/>
</body>
</html>
5、修改登录控制器 - LoginController,注释掉两个负责页面跳转的方法:index()、toLogin()
6、修改Spring MVC配置文件 - spring-mvc-config.xml
<!--定义视图控制器-->
<mvc:view-controller path="/" view-name="index"/>
<mvc:view-controller path="/toLogin" view-name="login"/>
7、添加静态资源,让Spring MVC正确处理,在WEB-INF里创建images目录,将图片拷贝进来。
8、修改首页文件,增加显示图片的元素
9、修改Spring MVC配置文件,单独处理静态资源
<!--处理静态资源的请求-->
<mvc:resources mapping="/images/**" location="/WEB-INF/images/"/>
10、启动服务器。查看效果
标签:总结,web,登录,Spring,springframework,spring,org,第四次 来源: https://blog.csdn.net/erwaplus/article/details/116444460
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