sampleprincipal.java

JAVA安全登陆体系的简单实现

package sample.principal;

import java.security.Principal;


public class SamplePrincipal implements Principal, java.io.Serializable {

    private String name;

    public SamplePrincipal(String name) {
		if (name == null)
		    throw new NullPointerException("illegal null input");

		this.name = name;
    }

    public String getName() {
		return name;
    }

    public String toString() {
		return("SamplePrincipal:  " + name);
    }

   
    public boolean equals(Object o) {
		if (o == null)
		    return false;
	
	        if (this == o)
	            return true;
	 
	        if (!(o instanceof SamplePrincipal))
	            return false;
	        SamplePrincipal that = (SamplePrincipal)o;
	
		if (this.getName().equals(that.getName()))
		    return true;
		return false;
    }
 
   
    public int hashCode() {
		return name.hashCode();
    }
}