inputscore.java~63~

java语言写的

package scoremis;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
import java.util.*;
import javax.swing.table.*;
/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2007</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class InputScore extends JFrame{
  String kc,bj;
  JPanel p=new JPanel(); //构造个各组件
  JLabel l1=new JLabel("课程:");
  JComboBox course=new JComboBox();
  JLabel l2=new JLabel("班级:");
  JComboBox tgreade=new JComboBox();
  JLabel l3=new JLabel("学期:");
  JComboBox term=new JComboBox();
  JButton sure=new JButton("查询");
  JButton tijiao=new JButton("提交");
  JButton quit=new JButton("退出");
  String tname="",psd,sql="";
  ResultSet rs=null;
  Vector tempvector=new Vector(1,1);
  DefaultTableModel model=new DefaultTableModel();
  JTable dbtable=new JTable(model);
  JScrollPane jScrollPane1=new JScrollPane(dbtable);
 public InputScore(String uname,String psd) {
   try{
     tname=uname;
     this.psd=psd;
     jbInit();
   }catch(Exception exception){
     exception.printStackTrace();
     }
  }
  private void jbInit() throws Exception{
    getContentPane().setLayout(new BorderLayout());//添加各组件
    l1.setFont(new java.awt.Font("Dialog", 0, 12));
    course.setFont(new java.awt.Font("Dialog", 0, 12));
    l2.setFont(new java.awt.Font("Dialog", 0, 12));
    tgreade.setFont(new java.awt.Font("Dialog", 0, 12));
    l3.setFont(new java.awt.Font("Dialog", 0, 12));
    term.setFont(new java.awt.Font("Dialog", 0, 12));
    sure.setFont(new java.awt.Font("Dialog", 0, 12));
    tijiao.setFont(new java.awt.Font("Dialog", 0, 12));
    quit.setFont(new java.awt.Font("Dialog", 0, 12));
    jScrollPane1.setFont(new java.awt.Font("Dialog", 0, 12));
    p.add(l1);p.add(course);p.add(l2);p.add(tgreade);p.add(l3);p.add(term);
    p.add(sure);p.add(tijiao);p.add(quit);
    sure.addActionListener(new chaxun());//给组件添加监视器
    tijiao.addActionListener(new chaxun());
    quit.addActionListener(new chaxun());
    model.addColumn("学号");//给表格添加各列
    model.addColumn("姓名");
    model.addColumn("成绩");
    getContentPane().add(jScrollPane1,"Center");
    this.getContentPane().add(p,BorderLayout.NORTH);
    course.addItem("请选择课程");
    course.addActionListener(new cquery());
    tgreade.addItem("请选择班级");
    term.addItem("请选择学期");
    sql="select distinct T_C.cname from T_C,teacher where teacher.name='"+tname+"' and teacher.ID=T_C.tID";
    try{         //给课程添加项目
      dbconn db=new dbconn();
      rs=db.Query(sql);
      while(rs.next()){
        course.addItem(rs.getString(1));
      }
    }catch(Exception er){System.out.println(er.toString());}
  }
class cquery implements ActionListener{       //给”班级“和”学期“添加项目
      public void actionPerformed(ActionEvent e){
        dbconn db=new dbconn();
        if(e.getSource()==course){
          kc=(String)course.getSelectedItem();
          sql="select T_C.Cgreade,T_C.Term from T_C,teacher where teacher.name='"+tname+"' and teacher.ID=T_C.tID and T_C.cname='"+kc+"'";
          try{
            tgreade.removeAllItems();
            tgreade.addItem("请选择班级");
            rs=db.Query(sql);
            while(rs.next()){
              tgreade.addItem(rs.getString(1));
              term.addItem(rs.getString(2));
            }
          }catch(Exception e2){System.out.println(e2.toString()); }
        }
      }
   }
   class chaxun implements ActionListener{      //用于处理查询事件：查询学生
     public void actionPerformed(ActionEvent e){
       dbconn db=new dbconn();
       kc=(String)course.getSelectedItem();
       bj=(String)tgreade.getSelectedItem();
       sql="select * from S_C where CID='"+kc+"' and Tgreade='"+bj+"'";
       boolean luru=false;
       try{
         ResultSet rs=db.Query(sql);
         if(rs.next()){
           luru=true;
         }
       }catch(Exception e1){System.out.println(e1.toString());}
       if(e.getSource()==sure){     //录入前先查询
         if(luru==true){
           //JOptionPane.showMessageDialog(null,"成绩未录入!!");
           JOptionPane.showMessageDialog(null,"成绩已经录入,不能再重新录入!!");
         }else {
           sql="select ID,name from student where greade='"+bj+"'";
           //sql="select student.ID,student.name,S_C.score from S_C,student where student.greade='"+bj+"' and student.greade=S_C.Tgreade";
           try{     //删除表格中原有的数据
             int j=model.getRowCount();
             if(j>0){
               for(int i=0;i<j;i++)
                 model.removeRow(0);
           }
           rs=db.Query(sql);
           while(rs.next()){
             tempvector=new Vector(1,1);
             tempvector.add(rs.getString(1));
             tempvector.add(rs.getString(2));
             model.addRow(tempvector);
             }
         }catch(Exception e2){System.out.println(e2.toString());}
       }
      }else if(e.getSource()==tijiao){   //用于处理 提交 事件：录入成绩
         int n=model.getRowCount();
         PreparedStatement updatestmt;
         String xq=(String)term.getSelectedItem();
         if(luru==false){
           sql="insert into S_C values(?,?,'"+bj+"','"+xq+"','"+kc+"',?)";
           try{
             if (model.getValueAt(n-1, 2)!=null) {
                 updatestmt = db.conn.prepareStatement(sql);
                 for (int i=0;i<n;i++){
                   updatestmt.clearParameters();
                   updatestmt.setString(1, (String) model.getValueAt(i, 0));
                   updatestmt.setString(2, (String) model.getValueAt(i, 1));
                   updatestmt.setFloat(3, Float.parseFloat((String)model.getValueAt(i, 2)));
                   updatestmt.executeUpdate();
                 }JOptionPane.showMessageDialog(null, "添加成功");
               }else
                 JOptionPane.showMessageDialog(null, "未录入完数据");
                 db.close();
           }catch(Exception e3){
             System.out.println(e3.toString());
           }
         }
       }else if(e.getSource()==quit){   //处理”退出“事件
         setVisible(false);
       }
     }
   }
}