Code example for struts1 to implement login function-javaTutorial-php.cn

This article mainly introduces an example of simple login function implemented by struts1 (source code attached). The editor thinks it is quite good, so I will share it with you now and give it as a reference. Let’s follow the editor to take a look.

Environment: MyEclipse 14

1 struts1 framework construction

Create a new web project in MyEclipse and name it struts1_login. At this time, it is an empty document and I will not take a screenshot. Then right-click on the project->select myeclipse->add struts capabilities

Click Install Apache Struts (1. x)Facet

Click next

Select *.do and change the package name to something related to your project of. For example, my package name is com.lichang.struts1

. Click next

and click Finish on our WEB There will be an additional struts-config.xml file under -INF

The above is the general process of letting myeclipse help us add the framework. The overall structure of the project is as follows:

At this point, our struts1 framework has been built 2 and then we started programming to implement it.

2 Then we started programming to implement it.

web.xml is as follows:

<?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>

Copy after login

Then configure LoginAction code in struts.xml as follows:

<?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>

Copy after login

index.jsp code is as follows:

<%@ 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>

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login_error.jsp code is as follows:

<%@ 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>

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login_success.jsp code is as follows:

<%@ 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>

Copy after login

LoginAction.java code is as follows:

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");
  }
}

Copy after login

LoginActionForm.java code as follows:

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;
  }
}

Copy after login

UserManager.java code is as follows:

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();
    }
    
  }
}

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UserNotFoundException.java code is as follows:

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
  }

}

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PasswordErrorException.java code is as follows:

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
  }

}

Copy after login

Run part screenshot

Username does not exist

##Source code download address: struts1_login_jb51.rar

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