updatepanel.java

java私塾里的图书进销存项目的源代码,非常不错,J2SE基础知识复习非常有帮助!

package cn.javass.bookmgr.book.ui.panels;

import java.awt.*;
import javax.swing.JPanel;
import com.borland.jbcl.layout.*;
import javax.swing.*;
import java.awt.event.*;
import cn.javass.bookmgr.util.uiutil.ChangePanel;
import cn.javass.bookmgr.MainFrame;
import cn.javass.bookmgr.book.business.factory.BookFactory;
import cn.javass.bookmgr.book.valueobject.BookModel;
/**
 * 图书模块表现层用于修改图书的Panel
 *
 * <p>Title: Java私塾第一个Java项目——图书进销存系统（单机版）</p>
 * <p>Description: 网址:<a href="http://www.javass.cn">http://www.javass.cn</a>
 * 新电话:[phone]   新地址:北京市海淀区厂洼路5号院深博达商务楼5层</p>
 * <p>Copyright: Copyright (c) 2008</p>
 * <p>Company: Java私塾</p>
 * @author Java私塾
 * @version 1.0
 */
public class UpdatePanel extends JPanel {
  //以下为本界面需要的组件定义
  XYLayout xYLayout1 = new XYLayout();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JLabel jLabel3 = new JLabel();
  JLabel jLabel5 = new JLabel();
  JLabel jLabel6 = new JLabel();
  JTextField txt_Id = new JTextField();
  JTextField txt_name = new JTextField();
  JButton btn_update = new JButton();
  JButton btn_back = new JButton();
  JTextField txt_inPrice = new JTextField();
  JTextField txt_salePrice = new JTextField();
  /**
  * 用来保持对主窗体的引用
  */
  MainFrame mf = null;
  /**
   * 需要修改的图书的String值
   */
  String str  = "";
  /**
  * 构建修改图书的Panel
  * @param mf 主窗体的引用
  * @param str 图书的String值
  */
  public UpdatePanel(MainFrame mf,String str) {
    try {
      this.str = str;
      this.mf = mf;
      jbInit();
    }
    catch(Exception ex) {
      ex.printStackTrace();
    }
  }
  /**
   * 真正进行组件初始化，并构建整个界面
   * @throws Exception
   */
  void jbInit() throws Exception {
    //1:根据传递过来的图书String，转换成为对应的图书Model
    BookModel bm = new BookModel(this.str);
    //2:把值设置到组件上，用于显示
    this.txt_name.setText(bm.getName());
    this.txt_Id.setText(bm.getId());
    this.txt_Id.setEditable(false);
    this.txt_inPrice.setText(""+bm.getInPrice());
    this.txt_salePrice.setText(""+bm.getSalePrice());

    jLabel1.setFont(new java.awt.Font("Dialog", 1, 30));
    jLabel1.setText("修改图书");
    this.setLayout(xYLayout1);
    jLabel2.setText("图书编号");
    jLabel3.setText("图书名称");
    jLabel5.setText("进货价格");
    jLabel6.setText("销售价格");

    btn_update.setText("保存");
    btn_update.addActionListener(new UpdatePanel_btn_update_actionAdapter(this));
    btn_back.setText("返回");
    btn_back.addActionListener(new UpdatePanel_btn_back_actionAdapter(this));
    xYLayout1.setWidth(486);
    xYLayout1.setHeight(397);

    this.add(jLabel1, new XYConstraints(96, 12, 377, 82));
    this.add(jLabel2,   new XYConstraints(13, 91, 77, 30));
    this.add(jLabel3,    new XYConstraints(238, 90, 77, 30));
    this.add(txt_Id,  new XYConstraints(63, 93, 166, 33));
    this.add(txt_name,    new XYConstraints(295, 93, 166, 33));
    this.add(btn_back,      new XYConstraints(307, 251, 117, 46));
    this.add(jLabel5,  new XYConstraints(13, 164, 77, 30));
    this.add(txt_inPrice,     new XYConstraints(63, 169, 166, 33));
    this.add(jLabel6,  new XYConstraints(238, 164, 77, 30));
    this.add(txt_salePrice,     new XYConstraints(295, 169, 166, 33));
    this.add(btn_update, new XYConstraints(142, 251, 117, 46));
  }
  /**
   * 点击修改按钮的事件处理
   * @param e Action事件对象
   */
  void btn_update_actionPerformed(ActionEvent e) {
    //1:收集参数
    String id = this.txt_Id.getText();
    String name = this.txt_name.getText();
    String inPrice = this.txt_inPrice.getText();
    String salePrice = this.txt_salePrice.getText();

    //1.1检测数据
    if(inPrice==null || inPrice.trim().length()==0){
      JOptionPane.showMessageDialog(null,"进货价格不能为空");
      return;
    }
    if(salePrice==null || salePrice.trim().length()==0){
      JOptionPane.showMessageDialog(null,"销售价格不能为空");
      return;
    }

    //2:组织参数
    BookModel bm = new BookModel();
    bm.setId(id);
    bm.setName(name);
    bm.setInPrice(Double.parseDouble(inPrice));
    bm.setSalePrice(Double.parseDouble(salePrice));
    //3:调用逻辑层Api，并获取返回值
    boolean flag = BookFactory.getInstance().createBookEbi().updateBook(bm);
    //4:根据返回值选择新的Panel
    if(flag){
      ChangePanel.changePanel(mf,new ListPanel(mf,false,null));
    }else{
      JOptionPane.showMessageDialog(null,"很遗憾，修改失败了");
    }
  }
  /**
   * 点击返回按钮的事件处理
   * @param e Action事件对象
   */
  void btn_back_actionPerformed(ActionEvent e) {
    ChangePanel.changePanel(mf,new ListPanel(mf,false,null));
  }
}
//以下为事件处理中的Adaper类
class UpdatePanel_btn_update_actionAdapter implements java.awt.event.ActionListener {
  UpdatePanel adaptee;

  UpdatePanel_btn_update_actionAdapter(UpdatePanel adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.btn_update_actionPerformed(e);
  }
}

class UpdatePanel_btn_back_actionAdapter implements java.awt.event.ActionListener {
  UpdatePanel adaptee;

  UpdatePanel_btn_back_actionAdapter(UpdatePanel adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.btn_back_actionPerformed(e);
  }
}