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服务器之家 - 编程语言 - Java教程 - struts1实现简单的登录功能实例(附源码)

struts1实现简单的登录功能实例(附源码)

2020-09-15 14:22sizai Java教程

本篇文章主要介绍了struts1实现简单的登录功能实例(附源码),小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧

环境:myeclipse 14     

1   struts1 框架搭建

在myeclipse新建web project 取名为struts1_login,此时是一个空文档就不截图了然后在project上右键->选择myeclipse->add struts capabilities

struts1实现简单的登录功能实例(附源码)

单击上面install apache struts(1.x)facet

struts1实现简单的登录功能实例(附源码)

点击next

struts1实现简单的登录功能实例(附源码)

选择*.do ,改下包名改成与你项目相关的。如我的包名为com.lichang.struts1

struts1实现简单的登录功能实例(附源码)

点击next

struts1实现简单的登录功能实例(附源码)

点击完成,在我们的web-inf下就会多出struts-config.xml文件

以上就是让myeclipse帮我们加入框架的大概过程。项目的整体结构如下:

struts1实现简单的登录功能实例(附源码)

至此我们的struts1 框架搭建完成2 接着我们就开始编程来实现了。

2 接着我们就开始编程来实现了。

 web.xml 如下:

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<?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>struts1_login</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>
 <servlet>
  <servlet-name>action</servlet-name>
  <servlet-class>org.apache.struts.action.actionservlet</servlet-class>
  <init-param>
   <param-name>config</param-name>
   <param-value>/web-inf/struts-config.xml</param-value>
  </init-param>
  <init-param>
   <param-name>debug</param-name>
   <param-value>3</param-value>
  </init-param>
  <init-param>
   <param-name>detail</param-name>
   <param-value>3</param-value>
  </init-param>
  <load-on-startup>0</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>action</servlet-name>
  <url-pattern>*.do</url-pattern>
 </servlet-mapping>
</web-app>

然后在struts.xml配置loginaction 代码如下:

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<?xml version="1.0" encoding="utf-8"?>
<!doctype struts-config public "-//apache software foundation//dtd struts configuration 1.3//en" "http://struts.apache.org/dtds/struts-config_1_3.dtd">
 
<struts-config>
  <form-beans>
    <form-bean name="loginform" type="com.lichang.struts1.loginactionform"/>
  </form-beans>
  
  <action-mappings>
  <!-- path:指定访问时的路径  type:指定action所在的类(一般是:包名.类名) name:指定和哪个表单(和jsp中javabean
  差不多的东西)对应,该例中name就和com.lichang.struts1.loginactionform类对应-->
    <action path="/login"
        type="com.lichang.struts1.loginaction"
        name="loginform"   
        scope="request"   
        >
      <forward name="success" path="/login_success.jsp" />
      <forward name="error" path="/login_error.jsp"/>   
    </action>
  </action-mappings>
 <message-resources parameter="com.lichang.struts1.applicationresources" />
 
</struts-config>

index.jsp代码如下:

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<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
 
<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html style="text-align:center">
 <head style="text-align:center">
 
 <title>index page</title>
 <meta http-equiv="pragma" content="no-cache">
 <meta http-equiv="cache-control" content="no-cache">
 <meta http-equiv="expires" content="0">
 <!--
<link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
 -->
 </head>
 
 <body style="text-align:center">
 <form action="login.do" method="post">
用户:<input type="text" name="username"><br>
密码:<input type="password" name="password"></br>
 <input type="submit" value="登录">
 </form>
 </body>
</html>

login_error.jsp代码如下:

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<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
 
 
<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
 <head>
  
  <title>error page</title>
  <meta http-equiv="pragma" content="no-cache">
  <meta http-equiv="cache-control" content="no-cache">
  <meta http-equiv="expires" content="0"
  <!--
  <link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  -->
 
 </head>
 <body>
    <%--
  <%=request.getattribute("msg") %>
  --%>
  ${msg }
 </body>
</html>

login_success.jsp代码如下:

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<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
 
 
<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
 <head>
  <title>success page</title>
  <meta http-equiv="pragma" content="no-cache">
  <meta http-equiv="cache-control" content="no-cache">
  <meta http-equiv="expires" content="0"
  
  <!--
  <link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
  -->
 
 </head>
 
 <body>
   ${username },登录成功
 </body>
</html>

loginaction.java代码如下:

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package com.lichang.struts1;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
 
import org.apache.struts.action.action;
import org.apache.struts.action.actionform;
import org.apache.struts.action.actionforward;
import org.apache.struts.action.actionmapping;
//这个类充当控制器
public class loginaction extends action {
  public actionforward execute(actionmapping mapping, actionform form,
      httpservletrequest request, httpservletresponse response)
      throws exception {
    //从actionform中获取username和password
    loginactionform laf = (loginactionform)form;
    string username = laf.getusername();
    string password = laf.getpassword();
    //调用业务逻辑类
    usermanager usermanager = new usermanager();
    try {
      usermanager.login(username, password);
      return mapping.findforward("success");
    }catch(usernotfoundexception e) {
      e.printstacktrace();
      request.setattribute("msg", "用户不能找到,用户名称=" + username );
    }catch(passworderrorexception e) {
      e.printstacktrace();
      request.setattribute("msg", "密码错误");
    }
    return mapping.findforward("error");
  }
}

loginactionform.java代码如下:

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package com.lichang.struts1;
 
import org.apache.struts.action.actionform;
 
/**
 *
 * actionform(表单用于获取用户输入的数据,相当于jsp中的javabean)
 * 不过sturts1在底层上实现了一些特别的方法以至于当java程序员定义了javabean并继承actionform并实现setxxx()方法时
 * 用户表单中元素的值就被一一赋给我们自己定义的变量。如public void setusername(string username)方法就可把form中username
 * 赋给username变量
 *
 */
 
public class loginactionform extends actionform {
  
  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;
  }
  
  
  
}

usermanager.java代码如下:

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package com.lichang.struts1;
//这个类就是用来处理用户登录的业务逻辑
public class usermanager {
 
  public void login(string username, string password) {
    if (!"admin".equals(username)) {
      throw new usernotfoundexception();
    }
    
    if (!"admin".equals(password)) {
      throw new passworderrorexception();
    }
    
  }
}

usernotfoundexception.java代码如下:

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package com.lichang.struts1;
 
public class usernotfoundexception extends runtimeexception {
 
  public usernotfoundexception() {
    // todo auto-generated constructor stub
  }
 
  public usernotfoundexception(string message) {
    super(message);
    // todo auto-generated constructor stub
  }
 
  public usernotfoundexception(throwable cause) {
    super(cause);
    // todo auto-generated constructor stub
  }
 
  public usernotfoundexception(string message, throwable cause) {
    super(message, cause);
    // todo auto-generated constructor stub
  }
 
}

passworderrorexception.java代码如下:

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package com.lichang.struts1;
 
public class passworderrorexception extends runtimeexception {
 
  public passworderrorexception() {
    // todo auto-generated constructor stub
  }
 
  public passworderrorexception(string message) {
    super(message);
    // todo auto-generated constructor stub
  }
 
  public passworderrorexception(throwable cause) {
    super(cause);
    // todo auto-generated constructor stub
  }
 
  public passworderrorexception(string message, throwable cause) {
    super(message, cause);
    // todo auto-generated constructor stub
  }
 
}

运行部分截图

登录界面

struts1实现简单的登录功能实例(附源码)

用户名不存在

struts1实现简单的登录功能实例(附源码)

源代码下载地址:struts1_login.rar

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。

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