奇怪的乱码问题 居然参数传递时出现乱码 请高手解答

今天练习一个添加学生信息的，出现了奇怪的乱码。使用的是Struts2+hibernate3
首先贴出其代码：
AddStudent.java

public class AddStudent extends ActionSupport{



	private static final long serialVersionUID = 1178440535366734465L;

	private String name;

	private String password;

	private String sex;

	private String email;

	private String jiguan;

	private String phone;

	private String tel;

	private String id;

	private String department;

	private StudentDAO stuDao;

	

	private StudentDAO getStudentDAO(){

		return DAOFactory.getInstance().createStudentDAO();

	}

	public String execute() throws Exception{

		stuDao = this.getStudentDAO();

		Student stu = new Student();

		try{

			stu.setId(new String(getId()));

			stu.setName(new String(getName().getBytes("ISO-8859-1"),"GB2312"));

			stu.setPassword(new String(getPassword().getBytes("ISO-8859-1"),"UTF-8"));

			stu.setDepartment(new String(getDepartment().getBytes("ISO-8859-1"),"utf-8"));

			stu.setSex(new String(getSex().getBytes("ISO-8859-1"),"utf-8"));

			stu.setJiguan(new String(getJiguan().getBytes("ISO-8859-1"),"utf-8"));

			stu.setEmail(getEmail());

			stu.setPhone(getPhone());

			stu.setTel(getTel());

			System.out.println(getName() +getPhone()+getDepartment());

		}catch(UnsupportedEncodingException e){

			e.printStackTrace();

		}

		boolean result=stuDao.saveStudent(stu);

		if(result){

			return SUCCESS;

		}else{

			return INPUT;

		}

	}

        //......setter getter

}

StudentDAOImp.java

public class StudentDAOImp implements StudentDAO {

	private static Log log = LogFactory.getLog(StudentDAOImp.class);



        //保存学生信息

	public boolean saveStudent(Student stu){

		System.out.println(stu.getName() +stu.getPhone());

		try{

			Session s= HibernateUtil.currentSession();

			HibernateUtil.beginTransaction();

			s.save(stu);

			HibernateUtil.commitTransaction();

			HibernateUtil.closeSession();

			return true;

		}catch(Exception e){

			log.fatal(e);

		}

		return false;

	}

}

当在页面中输入一些数据之后，在控制台输出如下数据：
某某23484461信电学院 //这是AddStudent类中System.out.println(); 输出的
??23484461 //这是StudentDAOImp类中的saveStudent方法中的System.out.输出的
这样存入数据库中的当然也是乱码。


如果在StudentDAOImp中直接实例一个类，也可以正常输出和存入数据库中而且没有乱码。


请高手解答这个是问什么啊？

<hibernate-configuration>

	<session-factory>

		<property name="connection.driver_class">com.mysql.jdbc.Driver</property>

		<property name="connection.url">jdbc:mysql://localhost:3306/stuman</property>

		<property name="connection.username">root</property>

		<property name="connection.useUnicode">true</property>

		<property name="connection.characterEncoding">UTF-8</property> 

		<property name="connection.password">123</property>

		<property name="connection.pool_size">5</property>

		<property name="dialect">org.hibernate.dialect.MySQLDialect</property>

		<!-- <property name="hbm2ddl.auto">create</property> -->

		<property name="show_sql">true</property>

		<mapping resource="Admin.hbm.xml" />

		<mapping resource="Teacher.hbm.xml"/>

		<mapping resource="Student.hbm.xml"/>

		<mapping resource="Course.hbm.xml"/>

		<mapping resource="Classes.hbm.xml"/>

		<mapping resource="Enrol.hbm.xml"/>

	</session-factory>

</hibernate-configuration>