www.pudn.com > onlineexam.zip > CheckLogonTag.java

package org.mmxbb.exam.business; 
 
import java.io.IOException; 
import javax.servlet.http.HttpSession; 
import javax.servlet.jsp.JspException; 
import javax.servlet.jsp.JspWriter; 
import javax.servlet.jsp.tagext.TagSupport; 
 
import org.mmxbb.exam.dao.ExamineeDAO; 
 
public class CheckLogonTag 
    extends TagSupport { 
 
  private LogonBean logonBean = new LogonBean(); 
  private String logon = "logon"; 
  private String page = "/index.jsp"; 
  private String role = ""; 
  private String display = "false"; 
  private String logonInfo = ""; 
 
  public String getLogon() { 
    return logon; 
  } 
 
  public void setLogon(String logon) { 
    this.logon = logon; 
  } 
 
  public String getPage() { 
    return page; 
  } 
 
  public void setPage(String page) { 
    this.page = page; 
  } 
 
  public String getRole() { 
    return role; 
  } 
 
  public void setRole(String role) { 
    this.role = role; 
  } 
 
  public String getDisplay() { 
    return display; 
  } 
 
  public void setDisplay(String display) { 
    this.display = display; 
  } 
 
  public int doStartTag() throws JspException { 
    return (SKIP_BODY); 
  } 
 
  public int doEndTag() throws JspException { 
    ExamineeDAO eDAO = null; 
    String examinee_id = null; 
    String examinee_name = null; 
    boolean valid = false; 
    HttpSession session = pageContext.getSession(); 
    if ( (session != null) && (session.getAttribute(logon) != null)) { 
      try { 
        logonBean = (LogonBean) session.getAttribute(logon); 
        examinee_id = logonBean.getLogon(); 
        eDAO = new ExamineeDAO(); 
        examinee_name = eDAO.findByKey(examinee_id).getName(); 
        this.logonInfo = examinee_id + "  ¿¼ÉúÐÕÃû£º" + examinee_name + " "; 
        if (CheckRole(role, logonBean)) { 
          valid = true; 
        } 
      } catch (Exception e) { 
        valid = false; 
      } 
    } 
 
    // Forward control based on the results 
    if (valid) { 
      return (EVAL_PAGE); 
    } else { 
      try { 
        pageContext.forward(page); 
      } catch (Exception e) { 
        throw new JspException(e.toString()); 
      } 
      return (SKIP_PAGE); 
    } 
  } 
 
  public boolean CheckRole(String role, LogonBean logonBean) { 
    if ( (role.equals("admin") && logonBean.isAuthority()) || 
        ( (role.equals("user")) && (logonBean.getLogon() != null) || 
         (! ("".equals(logonBean.getLogon()))))) { 
      if ("true".equals(display)) { 
        print(logonInfo); 
      } 
      return true; 
    } else { 
      return false; 
    } 
  } 
 
  private void print(String text) { 
    JspWriter writer = pageContext.getOut(); 
    try { 
      writer.print(text); 
    } catch (IOException e) { 
      e.printStackTrace(); 
    } 
  } 
 
  /** 
   * Release any acquired resources. 
   */ 
  public void release() { 
    super.release(); 
    this.logon = "logon"; 
    this.page = "/index.jsp"; 
  } 
  public String getLogonInfo() { 
    return logonInfo; 
  } 
  public void setLogonInfo(String logonInfo) { 
    this.logonInfo = logonInfo; 
  } 
}