Spring MVC登录实例

工程目录结构：

导入jar：

controllers.LoginController.java

package controllers;import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import domain.*;
import model.Login;@Controller
@RequestMapping("/user")
public class LoginController {@RequestMapping(value = "/login", method = RequestMethod.POST)public ModelAndView checkUser(User u) {Login login = new Login();ModelAndView mv = new ModelAndView();if (login.verify(u.getUsername(), u.getPwd(), u.getCla().getClassName())) {mv.setViewName("loginSuccess");mv.addObject("username", u.getUsername());} elsemv.setViewName("loginFailed");return mv;}
}

domain.Classes.java

package domain;public class Classes {private String className;public String getClassName() {return className;}public void setClassName(String className) {this.className = className;}
}

domain.User.java

package domain;import domain.Classes;
public class User {private String username;private String pwd;private Classes cla;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPwd() {return pwd;}public void setPwd(String pwd) {this.pwd = pwd;}public Classes getCla() {return cla;}public void setCla(Classes cla) {this.cla = cla;}
}

model.Login.java

package model;public class Login {public boolean verify(String username, String password, String classname) {if (username.equals("zlm") && password.equals("123") && classname.equals("jk1702"))return true;elsereturn false;}
}

spring-mvc.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"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"><!-- 默认的注解映射的支持 --><mvc:annotation-driven /><!-- 开启Controller注解支持 配置自定扫描的包 --><context:component-scan base-package="controllers" /><!-- 配置视图解析器: 返回值解析为实际的物理视图 --><beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/jsp/"></property><property name="suffix" value=".jsp"></property></bean>
</beans>

jsp.loginFailed.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login Failed</title>
</head>
<body><h3>Username or password or class error!</h3>
</body>
</html>

jsp.loginSuccess.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login Success</title>
</head>
<body><h3>Congratulations!</h3><p>User ${requestScope.username} login Success!</p>
</body>
</html>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"id="WebApp_ID" version="3.0"><display-name>Spring-MVC</display-name><welcome-file-list><welcome-file>index.html</welcome-file><welcome-file>index.htm</welcome-file><welcome-file>index.jsp</welcome-file><welcome-file>default.html</welcome-file><welcome-file>default.htm</welcome-file><welcome-file>default.jsp</welcome-file></welcome-file-list><filter><filter-name>encodingFilter</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><init-param><param-name>forceEncoding</param-name><param-value>true</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping>
</web-app>

login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login Page</title>
</head>
<body><form action="user/login" method="post">Username:<input type="text" name="username" /><br/> Password:<input type="password" name="pwd" /> <br/>Class:<input type="text" name="cla.className" /><br/><input type="submit" value="Login" /></form>
</body>
</html>

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