springMVC配置文件
<?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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--自动扫描包-->
<!-- 开启ioc 注解事务支持-->
<context:component-scan base-package="cn"></context:component-scan>
<!--开启spiring mvc注解支持-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--配置spring 中的视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="resolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean id="loginInterceptor" class="cn.hp.interceptor.LoginInterceptor"></bean>
</mvc:interceptor>
</mvc:interceptors>
</beans>
web.xml文件在我上一篇文章中拦截器https://blog.csdn.net/best_p1/article/details/118637785
登陆验证
package cn.hp.action;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpSession;
@Controller
public class UserAction {
@RequestMapping("/test1.do")
public String test01(){
System.out.println("正在执行test1这个业务逻辑");
return "index";
}
@RequestMapping("/test2.do")
public String test02(){
System.out.println("正在执行test2这个业务逻辑");
return "index";
}
@RequestMapping("/login.do")
public String login(String userName, String pwd, Model model,HttpSession session){
if (userName.equals("zs")&&pwd.equals("123")){
session.setAttribute("user",userName);
return "redirect:/main.do";
}else {
model.addAttribute("msg","用户名和密码错误");
return "login";
}
}
@RequestMapping("/main.do")
public String main(){
return "main";
}
@RequestMapping("/loginOut.do")
public String loginOut(HttpSession session){
session.invalidate();
return "login";
}
}
登录的拦截器LoginInterceptor：
package cn.hp.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
String path= request.getRequestURI();
if(path.indexOf("login.do")>0){
return true;
}
Object obj= request.getSession().getAttribute("user");
if (obj!=null){
return true;
}else {
request.setAttribute("msg","别想歪心思！请登录！");
request.getRequestDispatcher("login.jsp").forward(request,response);
return false;
}
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
}
}
jsp页面： login.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="login.do" method="post">
账号：<input type="text" name="userName"><br/>
密码：<input type="password" name="pwd"><br/>
<input type="submit" value="登录">
</form>
${msg}
</body>
</html>
main.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
${user}
<a href="loginOut.do">退出</a>
</body>
</html>
验证账号密码
进行拦截 登录才能访问
登录成功 可以访问test1.do test2.do
点击退出清除session
总结
本篇文章就到这里了，希望能给你带来帮助，也希望能够您能够关注编程网的更多内容!
