全手写struts用户登录系统

最新推荐文章于 2025-11-28 13:55:45 发布

原创最新推荐文章于 2025-11-28 13:55:45 发布 · 384 阅读

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本文介绍了一个基于Struts框架的简单登录系统实现过程。包括使用struts-config.xml进行配置，通过ActionForm收集用户输入，利用Action处理业务逻辑并跳转页面等内容。

本程序系统主要有一下几大部分：

总控制器struts-congig.xml配置文件、xml配置文件、登录welcome和Err的jsp页面、还有最后的两个表单和小控制器（小队长）LoginAction

login.jsp:

  <body>
  <!-- login.jsp  strutslogin为项目名login为配置的资源名 -->
    <form action="/strutslogin/login.do" method="post">
    	u:<input type="text" name="username"><br>
    	p:<input type="password" name="password"><br>
    	<input type="submit" value="登录">
    </form>
  </body>

web.xml：

 <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/config/struts-config.xml</param-value>
    </init-param>
  </servlet>
  
  <filter>
  	<filter-name>MyFilter1</filter-name>
  	<filter-class>com.dqd.filters.MyFilter1</filter-class>
  </filter>
  
  <filter-mapping>
  	<filter-name>MyFilter1</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
  
  
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

struts-config.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!-- struts-config文件 -->
<!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> <!-- 表单 -->
		<form-bean name="userForm" type="com.dqd.forms.UserForm"></form-bean>
	</form-beans>
	
	<action-mappings><!-- 小队长 -->
		<action path="/login" name="userForm" type="com.dqd.actions.LoginAction">
		
		<forward name="ok" path="/WEB-INF/wel.jsp"></forward>
		<forward name="err" path="/WEB-INF/err.jsp"></forward>
		
		</action>
		
	</action-mappings>
</struts-config>

UserForm表单（继承ActionForm）:

public class UserForm 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;
	}
	
}

LoginAction(小队长继承Action)：

public class LoginAction extends Action {
	//loginAction
	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		UserForm userform = (UserForm) form;
		request.setAttribute("username1", userform.getUsername());
		System.out.println("用户名="+userform.getUsername());
		if("123".equals(userform.getPassword())){
			return mapping.findForward("ok");
		}else{
			return mapping.findForward("err");
		}
	}
	
}

Filter(控制乱码)：

    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) {
        // TODO Auto-generated method stub
    	try{
    		arg0.setCharacterEncoding("UTF-8");
    		arg2.doFilter(arg0, arg1);
    		arg1.setContentType("text/html;charset=utf-8");
    		System.out.print("aaaaa");
    	}catch(Exception e){
    		e.printStackTrace();
    	}
    }