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Struts学习笔记1——管理员登录（本地版）

    博客分类：
  • J2EE
StrutsJavaApacheJSPSQL 
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建立 3 个jsp页面
Login。Jsp 
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>

<body>
<form id="form1" name="form1" method="post" action="login.do">
  <p>用户名：
    <label>
    <input name="username" type="text" id="username" />
    </label>
  </p>
  <p>密码：
    <label>
    <input name="password" type="text" id="password" />
    </label>
  </p>
  <p>
    <label>
    <input type="submit" name="Submit" value="提交" />
    </label>
    <label>
    <input type="reset" name="Submit2" value="重置" />
    </label>
  </p>
</form>
</body>
</html>


Success.jsp 
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
登录成功
</body>
</html>

Errors.jsp 
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
登录失败
</body>
</html>

1 个 form  
package form;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;

public class LoginForm extends ActionForm {
	private String username;
	private String password;
	
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		// TODO Auto-generated method stub
		ActionErrors errors=new ActionErrors();
		if(username.length()<1){
			errors.add("a1",new ActionMessage("username.null"));
		}
		if(password.length()<1){
			errors.add("a2",new ActionMessage("password.null"));
		}
		
		return errors;
	}

	/** 
	 * Method reset
	 * @param mapping
	 * @param request
	 */
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		// TODO Auto-generated method stub
	}

	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;
	}
}


1 个 action  
package action;

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;
import form.LoginForm;

public class LoginAction extends Action {
	
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method
												// stub
		String username = loginForm.getUsername();
		String password = loginForm.getPassword();
		if (username.equals("11") && password.equals("11")) {
			return mapping.findForward("ok");
		}
		return mapping.findForward("nook");

	}
}

Struts-config.xml 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="loginForm" type="form.LoginForm" />

  </form-beans>

  <global-exceptions />
  <global-forwards />
  <action-mappings >
    <action
      attribute="loginForm"
      name="loginForm"
      path="/login"
      scope="request"
      type="action.LoginAction">
      <forward name="ok" path="/success.jsp" />
      <forward name="nook" path="/errors.jsp" />
    </action>
  </action-mappings>
  <message-resources parameter="com.yourcompany.struts.ApplicationResources" />
</struts-config>



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| DispatchActionDemo
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