loginaction.java

这是我自己做的一个选课系统

package org.struts2.actions;

import java.util.List;

import org.hibernate.dao.LoginDAO;
import org.hibernate.dao.StudentDAO;
import org.hibernate.dao.TeacherDAO;

import org.struts2.common.PageAction;
import org.struts2.util.Constants;
import org.struts2.util.Pager;

import com.opensymphony.xwork2.Action;

public class LoginAction extends PageAction{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	private LoginDAO loginDAO;
	
	private TeacherDAO teacherDAO;
	
	private StudentDAO studentDAO;
	
	private String username;

	private String password;
	
	private String role;

	

	public void validate() {
		clearErrorsAndMessages();
		
		if (username == null || username.equals("")) {
			addFieldError("username", getText("login.error.username"));
		}
		if (password == null || password.equals("")) {
			addFieldError("password", getText("login.error.password"));
		}
	}

	public String execute() throws Exception {
		boolean isValid = false;
		List list = null;
		if(role.equals("student")){
			isValid = this.studentDAO.isValid(username, password);
		}else if(role.equals("teacher")){
			isValid = this.teacherDAO.isValid(username, password);
		}else if(role.equals("admin")){
			isValid = this.loginDAO.isValid(username, password);
		}
		if (isValid) {
			setSession(Constants.USERNAME_KEY,username);
			setSession(Constants.USERNAME_ROLE,role);
			if(role.equals("student")){
				list = this.getStudentDAO().findAllByUsername(username);
			}else if(role.equals("teacher")){
				list = this.teacherDAO.findAllByUsername(username);
			}
			
		    setSession(Constants.USERINFO_KEY,list);
			return Action.SUCCESS;
		} else {
			super.addActionError(super.getText("login.message.failed"));
			return Action.INPUT;
		}
		
	}

	public TeacherDAO getTeacherDAO() {
		return teacherDAO;
	}

	public void setTeacherDAO(TeacherDAO teacherDAO) {
		this.teacherDAO = teacherDAO;
	}

	public StudentDAO getStudentDAO() {
		return studentDAO;
	}

	public void setStudentDAO(StudentDAO studentDAO) {
		this.studentDAO = studentDAO;
	}

	public LoginDAO getLoginDAO() {
		return loginDAO;
	}

	public void setLoginDAO(LoginDAO loginDAO) {
		this.loginDAO = loginDAO;
	}

	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 getRole() {
		return role;
	}

	public void setRole(String role) {
		this.role = role;
	}

}