sciencequery.java

这是一个用java编写的小小的高校学生成绩管理小,可以实现简单的学生考试管理!

package infomanagement;

import java.awt.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
import com.borland.dbswing.*;
import com.borland.dx.sql.dataset.*;
import java.awt.event.*;
import com.borland.dx.dataset.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class ScienceQuery extends JDialog {
  private JPanel jPanel1 = new JPanel();
  private XYLayout xYLayout1 = new XYLayout();
  private JLabel jLabel1 = new JLabel();
  private JLabel jLabel2 = new JLabel();
  private JLabel jLabel3 = new JLabel();
  private JTextField jtfCardID = new JTextField();
  private JButton jbnQuery = new JButton();
  private Database database1 = new Database();
  private QueryDataSet queryDataSet1 = new QueryDataSet();
  private JdbTable jdbTable1 = new JdbTable();
  private JLabel jLabel4 = new JLabel();
  private JButton jbnExit = new JButton();
  private Column column1 = new Column();
  private Column column2 = new Column();
  private Column column3 = new Column();
  private Column column4 = new Column();
  private Column column5 = new Column();
  private JdbTextField jdbTextField1 = new JdbTextField();
  private QueryDataSet queryDataSet2 = new QueryDataSet();

  public ScienceQuery(Frame frame, String title, boolean modal) {
    super(frame, title, modal);
    try {
      jbInit();
      pack();
    }
    catch(Exception ex) {
      ex.printStackTrace();
    }
  }

  public ScienceQuery() {
    this(null, "", false);
  }
  private void jbInit() throws Exception {
    //设置jPanel1为任意放置
    jPanel1.setLayout(xYLayout1);
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 23));
    jLabel1.setForeground(Color.magenta);
    jLabel1.setBorder(BorderFactory.createEtchedBorder());
    //设置文本标题 理科成绩查询
    jLabel1.setText("                     理科成绩查询");
    jLabel2.setBorder(BorderFactory.createEtchedBorder());
    //设置文本标题 准考证号
    jLabel3.setText("准考证号");
    //设置文本标题
    jbnQuery.setText("执行查询");
    jbnQuery.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jbnQuery_actionPerformed(e);
      }
    });
    //连接数据库（local）
    database1.setConnection(new com.borland.dx.sql.dataset.ConnectionDescriptor("jdbc:odbc:local", "sa", "", false, "sun.jdbc.odbc.JdbcOdbcDriver"));
    //设置文本标题 执行查询
    jLabel4.setText("总成绩");
    //设置文本标题 退出
    jbnExit.setText("退出");
    //添加退出事件
    jbnExit.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jbnExit_actionPerformed(e);
      }
    });
    column1.setColumnName("NewColumn1");
    column1.setDataType(com.borland.dx.dataset.Variant.STRING);
    column1.setPreferredOrdinal(4);
    column1.setServerColumnName("NewColumn1");
    column1.setSqlType(0);
    column2.setColumnName("subject");
    column2.setDataType(com.borland.dx.dataset.Variant.STRING);
    column2.setPrecision(50);
    column2.setPreferredOrdinal(0);
    column2.setSchemaName("dbo");
    column2.setTableName("science2");
    column2.setServerColumnName("subject");
    column2.setSqlType(12);
    column3.setColumnName("subjectNameID");
    column3.setDataType(com.borland.dx.dataset.Variant.LONG);
    column3.setPreferredOrdinal(1);
    column3.setSchemaName("dbo");
    column3.setTableName("science2");
    column3.setServerColumnName("subjectNameID");
    column3.setSqlType(-5);
    column4.setColumnName("cardID");
    column4.setDataType(com.borland.dx.dataset.Variant.LONG);
    column4.setPreferredOrdinal(2);
    column4.setSchemaName("dbo");
    column4.setTableName("science2");
    column4.setServerColumnName("cardID");
    column4.setSqlType(-5);
    column5.setColumnName("achievement");
    column5.setDataType(com.borland.dx.dataset.Variant.STRING);
    column5.setPrecision(50);
    column5.setPreferredOrdinal(3);
    column5.setSchemaName("dbo");
    column5.setTableName("science2");
    column5.setServerColumnName("achievement");
    column5.setSqlType(12);




    this.getContentPane().add(jPanel1, BorderLayout.CENTER);
    //在jPanel1中放置各个控件
    jPanel1.add(jLabel1, new XYConstraints(0, 1, 399, 53));
    jPanel1.add(jLabel3,   new XYConstraints(10, 66, 80, 19));
    jPanel1.add(jtfCardID,    new XYConstraints(97, 66, 80, 21));
    jPanel1.add(jLabel2,   new XYConstraints(0, 53, 398, 49));
    jPanel1.add(jbnQuery,       new XYConstraints(300, 66, 90, 22));
    jPanel1.add(jdbTable1,      new XYConstraints(0, 100, 398, 154));
    jPanel1.add(jLabel4,     new XYConstraints(10, 268, 80, 20));
    jPanel1.add(jbnExit,     new XYConstraints(300, 268, 90, 20));
    jPanel1.add(jdbTextField1,    new XYConstraints(100, 268, 90, 20));
  }
  //定义退出方法
  void cancel(){
    dispose() ;
  }
  //退出事件
  void jbnExit_actionPerformed(ActionEvent e) {
    cancel();
  }
  //执行查询语句
  void jbnQuery_actionPerformed(ActionEvent e) {
    //进行数据查询
    try{
    //获得准考证号
    int cardID1 = Integer.parseInt(jtfCardID.getText().trim());
    //查询学习成绩
    queryDataSet1.setQuery(new com.borland.dx.sql.dataset.QueryDescriptor(database1, "SELECT science2.cardID,science2.subject,science2.achievement,science2.subjectNameID " +
      "FROM info.dbo.science2 where science2.cardID = '"+cardID1+"'", null, true, Load.ALL));
    // queryDataSet1.setColumns(new Column[] {column2, column3, column4, column5, column1});
    //加入到jdbTable1中
    jdbTable1.setDataSet(queryDataSet1);
    //执行sum语句，获得成绩总分
    queryDataSet2.setQuery(new com.borland.dx.sql.dataset.QueryDescriptor(database1, "SELECT SUM(achievement) AS SUM_achievement FROM info.dbo.science2\n" +
      "where science2.cardID ='"+cardID1+"'", null, true, Load.ALL));
    //在jdbTextField1中加入一列
    jdbTextField1.setColumnName("SUM_achievement");
    //把数据集加入到jdbTextField1中
    jdbTextField1.setDataSet(queryDataSet2);
    }
    catch(Exception sql){
      JOptionPane.showMessageDialog(this,"准考证不存在，请重试");
    }
  }
}