SpringMVC简单的登录

深碍√TFBOYSˉ_ 2023-10-17 07:58 31阅读 0赞

一、创建WebProject工程, 选择对应的Maven

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二、修改pom.xml文件 (将dependencies所有的都替换)

<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>springmvc</groupId>
    	<artifactId>springmvc</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<packaging>war</packaging>
    	<name />
    	<description />
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    	<dependencies>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-webmvc</artifactId>
    			<version>4.1.6.RELEASE</version>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-tx</artifactId>
    			<version>4.1.6.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>javax.servlet</groupId>
    			<artifactId>javax.servlet-api</artifactId>
    			<version>3.1-b05</version>
    		</dependency>
    	</dependencies>
    	<build>
    		<finalName>springmvc</finalName>
    		<sourceDirectory>${basedir}/src</sourceDirectory>
    		<outputDirectory>${basedir}/WebRoot/WEB-INF/classes</outputDirectory>
    		<resources>
    			<resource>
    				<directory>${basedir}/src</directory>
    				<excludes>
    					<exclude>**/*.java</exclude>
    				</excludes>
    			</resource>
    		</resources>
    		<plugins>
    			<plugin>
    				<artifactId>maven-war-plugin</artifactId>
    				<configuration>
    					<webappDirectory>${basedir}/WebRoot</webappDirectory>
    					<warSourceDirectory>${basedir}/WebRoot</warSourceDirectory>
    				</configuration>
    			</plugin>
    			<plugin>
    				<artifactId>maven-compiler-plugin</artifactId>
    				<configuration>
    					<source>1.6</source>
    					<target>1.6</target>
    				</configuration>
    			</plugin>
    		</plugins>
    	</build>
    </project>

三、创建src/main/java; source Folder 如图所示(控制层controll; 业务层service;)

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四、spring-mvc.xml配置文件放在(WEB-INF文件下）

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**spring-mvc.xml**

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
    		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    
    	<context:component-scan base-package="com.hlx" />
    
    </beans>

**修改web.xml文件**

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="3.0" 
    	xmlns="http://java.sun.com/xml/ns/javaee" 
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    	http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
      <display-name></display-name>	
      
       
       <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
      
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:applicationContext.xml</param-value>
      </context-param> 
       
      <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>/WEB-INF/spring-mvc.xml</param-value>
        </init-param>
      </servlet>
      
      <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>*.html</url-pattern>
      </servlet-mapping>
    </web-app>

**五、创建JSP页面**

**login.jsp页面**

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>登录</title>
    </head>
    <body>
       <p style="color:red;font-size:16px">${error}</p>
    	<form action="login.html" method="post">
    		<p>
    			用户名： <input name="uname" type="text">
    		</p>
    		<p>
    			密  码： <input name="upasswd" type="password">
    		</p>
    		<p>
    			<input type="submit" value="登录">
    		</p>
    	</form>
    
    
    
    </body>
    </html>

**success.jsp页面**

六、上面具体类的代码：

package com.hlx.service;
    
    import org.springframework.stereotype.Service;
    import org.springframework.web.servlet.ModelAndView;
    
    @Service
    public class LoginService {
    	
    	/**
    	 * 业务方法
    	 * @param err
    	 * @param ok
    	 * @param name
    	 * @param pwd
    	 * @return
    	 */
    	public ModelAndView doLogin(String err,String ok,String name,String pwd){
    		
    		//判断
    		if(name==null || "".equals(name)){
    			return new  ModelAndView(err, "error", "用户名不能为空！");
    		}
    		if(pwd==null || "".equals(pwd)){
    			return new  ModelAndView(err, "error", "密码不能为空！");
    		}
    		
    		// uname = admin , passwd = aaa
    		if("admin".equals(name)  && "aaa".equals(pwd)){
    			return new ModelAndView(ok);
    		}
    		
    		return new ModelAndView(err, "error", "用户名或者密码错误");
    		
    	}
    
    }

package com.hlx.controll;
    
    import javax.annotation.Resource;
    import javax.servlet.http.HttpServletRequest;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.servlet.ModelAndView;
    
    import com.hlx.service.LoginService;
    
    @Controller
    public class LoginControll {
     
    	//业务
    	@Resource
    	private LoginService service;
    	
    	
    	//请求
    	@Resource
    	HttpServletRequest request;
    	
    	/**
    	 * 跳转的页面
    	 * @return
    	 */
    	@RequestMapping("index")
    	public ModelAndView toLoginPage(){
    		return new ModelAndView("jsp/login.jsp");
    		
    	}
    	/**
    	 * 调用业务方法
    	 * 
    	 * @return
    	 */
    	@RequestMapping("login")
    	public ModelAndView doLogin(){
    		//跳转的错误页面
    		String errPageString = "jsp/login.jsp";
    		//跳转的成功页面
    		String okPageString = "jsp/success.jsp";
    		
    		//获得用户名或密码
    		String name = request.getParameter("uname");
    		String pwd = request.getParameter("upasswd");
    		
    		//调用业务方法
    		return service.doLogin(errPageString,okPageString,name,pwd);
    	}
    	
    	
    	
    }

效果如下：

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[Center]: https://img-blog.csdn.net/20160718110100186?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 1]: https://img-blog.csdn.net/20160718110413265?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 2]: https://img-blog.csdn.net/20160718110819767?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 3]: https://img-blog.csdn.net/20160718111520067?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 4]: https://img-blog.csdn.net/20160718111532082?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 5]: https://img-blog.csdn.net/20160718111543550?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 6]: https://img-blog.csdn.net/20160718111600645?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center