firstpage.java

这是一个java编写的程序

/**
 * Example Mapper Application
 * by: Marty Phelan
 *
 * This example is free software; you can redistribute it and/or
 * modify it as you wish.  It is released to the public domain.
 *
 * This example is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */
package com.taursys.examples.simpleweb;

import java.util.Date;

import com.taursys.servlet.ServletForm;
import com.taursys.util.DataTypes;
import com.taursys.xml.TextField;

/**
 * This form demonstrates some of the basics of ServletForms and a TextField.
 * This page also demonstrates the recycle feature of ServletApp.  This
 * ServletForm will be recycled after each use.  This saves on ServletForm
 * creation overhead.
 */
public class FirstPage extends ServletForm {
  TextField currentTime = new TextField(DataTypes.TYPE_DATE);

  /**
   * Constructs a new FirstPage and initializes component properties.
   */
  public FirstPage() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  /**
   * Set component properties here.  It is not recommended to put anything
   * other than property settings in here.  Any Exception will cause the
   * constructor to fail.
   */
  private void jbInit() throws Exception {
    this.setDocumentURI("resource:///forms/FirstPage.html");
    currentTime.setParameter("mytime");
    currentTime.setId("currentTime");
    this.add(currentTime);
  }

  /**
   * One time initialization of the ServletForm.  This method is invoked ONCE.
   * It is the first method invoked by the doGet method.  If the form is
   * recycled, it will NOT be invoked again by doGet.
   */
  protected void initForm() throws java.lang.Exception {
    super.initForm();
    // Display the original time this form was created
    // by manipulating the DOM directly, without using a component
    getDocumentAdapter().setElementText("createTime", new Date().toString());
  }

  /**
   * This method is invoked by doGet to open the form.
   * It is invoked after any parameters have been read, but before input
   * values have been read.  Override this method to provide custom
   * behavior such as opening data sources.  There is no need to invoke
   * super.openForm().
   */
  protected void openForm() throws java.lang.Exception {
    currentTime.setValue(new Date());
  }
}