用Struts，Spring和hibernate实现登录操作

亦凉 2022-06-17 10:22 130阅读 0赞

刚刚接触Java web 开发，写了一个登录界面，谈谈自己做的时候的一些 感受和具体步骤。

写一个登录的功能首先得有一个页面吧

0.配置环境，因为我是用的myeclipse 我全部是通过myeclipse - Project Facets --一次性导入了Struts，spring 和hibernate。自动生成了

![Image 1][]所以后面就不说怎么导的了。

1. 写jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <html>
      <body>    
         <form action= "loginAction" method = "post">
            请您输入账号 ： <input name = "username"  type = "text"><br>
            请您输入密码 ：  <input name = "password" type = "password"><br>
                      <input type = "submit" value = "登录" >
         </form>
      </body>
    
    </html>

这个页面有一个<form action="   ">

action 相当于是这个表单的内容要提交给谁

可以先不写

2.编写loginAction

package action;
    
    import service.LoginService;
    
    import com.opensymphony.xwork2.ActionSupport;
    
    public class LoginAction extends ActionSupport {
    	private String username;
    	  private String password;
         	public String getUsername() {
    			return username;
    		}
    		public void setUsername(String username) {
    			this.username = username;
    		}
    
    		public String getPassword() {
    			return password;
    		}
    
    		public void setPassword(String password) {
    			this.password = password;
    		}
    	 
      public String execute() {
           if(username.equals("admin") && password.equals("123456")) {
          return "success";
        } else {
          return "error";
        }
      }
      //Geter and Seter
    }

这里可以把先前写的jsp页面的action填上去。

3.配置Struts

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
    
    <struts>
      <constant name="struts.devMode" value="true"/>
      <constant name="struts.i18n.encoding" value="GBK"/>
      <package name="default" namespace="/" 
        extends="struts-default">
        
        <action name="loginAction" class="action.LoginAction">
          <result name="success">/loginSuccess.jsp</result>
          <result name="error">/loginFail.jsp</result>
          </action>
      </package>
    </struts>

这里是在loginAction 返回的是SUCCESS则跳转到loginSuccess.jsp页面，错误同理。jsp页面怎么写就不详细介绍了

4.整合Spring

先写一个LoginService接口

package service;
    
    public interface LoginService  {
      public boolean login(String username,String password);
    }

LoginServiceImpl去实现LoginService中的方法。

package service.impl; import service.LoginService; public class LoginServiceImpl implements LoginService { public boolean login(String username, String password) { if(username.equals("admin") && password.equals("123456")) { return true; } else { return false; } } }

5.修改LoginAction

package action;
    
    import service.LoginService;
    
    import com.opensymphony.xwork2.ActionSupport;
    
    public class LoginAction extends ActionSupport {
    	private String username;
    	  private String password;
    	 private LoginService loginService;
    	  
    	  public LoginService getLoginService() {
    		return loginService;
    	}
    
    	public void setLoginService(LoginService loginService) {
    		this.loginService = loginService;
    	}
    
    	public String getUsername() {
    			return username;
    		}
    
    		public void setUsername(String username) {
    			this.username = username;
    		}
    
    		public String getPassword() {
    			return password;
    		}
    
    		public void setPassword(String password) {
    			this.password = password;
    		}
    	 
      public String execute() {
    	  if(loginService.login(username, password)){
          // if(username.equals("admin") && password.equals("123456")) {
          return "success";
        } else {
          return "error";
        }
      }
      //Geter and Seter
    }

6.修改applicationContext.xml 把loginServiceImpl注入给Action

<?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:p="http://www.springframework.org/schema/p"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd" xmlns:tx="http://www.springframework.org/schema/tx">
     
      <bean id="loginAction" class="action.LoginAction">
        <property name="loginService">
          <ref bean="loginService"/>
        </property>
      </bean>
    </beans>

7.整合hibernate

连接数据库

<?xml version='1.0' encoding='UTF-8'?>
    <!DOCTYPE hibernate-configuration PUBLIC
              "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
              "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
    
    <hibernate-configuration>
    
        <session-factory>
            <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
            <property name="connection.url">jdbc:mysql://localhost:3306/demo1</property>
            <property name="connection.username">root</property>
            <property name="connection.password">123</property>
            <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        </session-factory>
    
    </hibernate-configuration>

8.添加实体及映射文件

package entity;
    
    public class User {
    	private String username;
    	private String password;
    	public String getUsername() {
    		return username;
    	}
    	public void setUsername(String username) {
    		this.username = username;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    }

<?xml version="1.0"?>  
    <!DOCTYPE hibernate-mapping PUBLIC   
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"  
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">  
          
    <hibernate-mapping>  
        <class name="entity.User" table="userlist">  
            <id name="username" column = "username">  
                <generator class="uuid"/>  
            </id>  
            <property name="password"  column = "password" />
        </class>  
    </hibernate-mapping>

映射文件和实体类放在同一个包下，映射文件就新建一个xml文件，把名字改成 实体名.hbm.xml就行。

然后再在hibernate.cfg.xml中添加映射 <mapping resource="entity/User.hbm.xml"/>（添加在 <session-factory> 里）

9.添加Dao层 LoginDao 接口

package dao;
    
    public interface LoginDao {
    	public boolean login(String username, String password) ;
    }

LoginDaoImpl实现

package dao.impl;
    import hibernate.HibernateSessionFactory;
    import java.util.List;
    import org.hibernate.*;
    import dao.LoginDao;
    
    
    public class LoginDaoImpl implements LoginDao {
      public boolean login(String username, String password) {
        Session session = HibernateSessionFactory.getSession();
        Query query = session.createQuery("from User where username='"+username+"' and password='"+password+"'");
        
        List list = query.list();
        if(list.size() > 0) { return true; }
        else { return false; }
      }
    }

10.修改LoginServiceImpl

package service.impl; import service.LoginService; import dao.LoginDao; public class LoginServiceImpl implements LoginService { private LoginDao loginDao; public LoginDao getLoginDao() { return loginDao; } public void setLoginDao(LoginDao loginDao) { this.loginDao = loginDao; } public boolean login(String username, String password) { return loginDao.login(username, password); } }

11.修改applicationContext.xml，将loginDaoImpl 注入loginServiceImpl

这样用ssh框架实现登录功能的程序就做好啦

这是我第一次写博客，写的不好有不对的地方请多多见谅，欢迎指出更正

[Image 1]: